High-Voltage Resistors - Rhopoint Components

Caddock MG -15 Range

Lee Waterman — Thu, 25 Nov 2021 15:53:52 +0000

The MG precision high-voltage axial resistor range with “-15” ratings from Caddock offers a resistance range from 6.5MΩ up to 2GΩ, an extended voltage rating of up to 48kV and a power rating up to 15W. The MG -15 series offers tolerances of ±1% and ±5% and has demonstrated stability of 0.01% per 1,000 hours in extended load life testing. Caddock’s Micronox^® resistance films are the source of their outstanding combination of performance features.

Cylindrical high voltage axial leaded resistor
Resistance values from 6.5MΩ up to 2GΩ *
Tolerances of ±1% and ±5%
TCR as tight as ±80 ppm/°C from -15°C to +105°C, referenced to +25°C
Operating Temperature Range of -55°C to +225°C
Maximum operating voltage from 1.6kV up to 48kV *
Maximum power rating from 1W up to 15W *
Excellent long-term stability of 0.01% per 1,000 hours
All models are manufactured with Caddock’s non-inductive design

_{* Dependent on selected resistor model}

Typical applications for the MG precision high-voltage axial resistor range with “-15” include:

TWT HV power supplies
Electron microscopes
E-beam equipment
Electrical distribution HV monitor dividers
X-ray systems
Geophysical instruments
Medical electronics
HV & Compact instrument probes

Caddock MG -15 Range Specification Table

Model No.	Wattage	Max voltage	Coating dielectric strength	Resistance range	Tolerance	TCR
MG714	1W	1.6kV	750AC_rms	6.5MΩ to 20MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG715	1W	3.2kV	750AC_rms	26MΩ to 50MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG716	1.5W	6.4kV	750AC_rms	70MΩ to 75MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG717	1.5W	3.2kV	750AC_rms	17MΩ to 75MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG721	2W	6.4kV	750AC_rms	51MΩ to 100MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG730	3W	9.6kV	1000AC_rms	77MΩ to 250MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG731	2.6W	6.4kV	1000AC_rms	40MΩ to 150MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG735	3.6W	16kV	1000AC_rms	178MΩ to 300MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG740	3.6W	9.6kV	1000AC_rms	64MΩ to 300MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG745	5W	24kV	1000AC_rms	288MΩ to 500MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG750	5W	16kV	1000AC_rms	128MΩ to 500MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG780	7.5W	24kV	1000AC_rms	192MΩ to 750MΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG785	8W	32kV	1000AC_rms	320MΩ to 1GΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG810	10W	40kV	1000AC_rms	400MΩ to 1.25GΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)
MG815	15W	48kV	1000AC_rms	384MΩ to 2GΩ	±1% / ±5%	±80 ppm/°C from -15°C to +105°C (Referenced to +25°C)

Caddock Electronics, Inc. manufactures High Performance, High Stability Film Resistors designed for precision applications. Caddock uses unique resistance film technologies and process technologies to create solutions for performance demanding applications. Their product line consists of over 250 models, spanning a multitude of series, all of which are manufactured at their facilities in Roseburg, Oregon, USA. Please visit www.caddock.com for more information.

The post Caddock MG -15 Range appeared first on Rhopoint Components.

Caddock MG Extended Range

Lee Waterman — Thu, 25 Nov 2021 15:53:12 +0000

The MG precision high-voltage axial resistor range with extended values from Caddock offers a resistance range from 600Ω up to 10GΩ and a voltage rating up to 30kV with the possibility of 1.5 times maximum continuous operating voltage for 5 seconds. The power rating for these resistors is up to 15W with the possibility of 5 times rated power for 5 seconds (not exceeding maximum voltage). The MG series offers tolerances of ±1% and ±5% and has demonstrated stability of 0.01% per 1,000 hours in extended load life testing. Caddock’s Micronox^® resistance films are the source of their outstanding combination of performance features.

Cylindrical high voltage axial leaded resistor
Resistance values from 600Ω up to 10GΩ *
Tolerances of ±1% and ±5%
TCR as tight as ±80 ppm/°C from +25°C to +105°C, -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
Operating Temperature Range of -55°C to +225°C
Maximum operating voltage from 2kV up to 30kV *
Maximum power rating from 1.5W up to 15W *
Excellent long-term stability of 0.01% per 1,000 hours
All models are manufactured with Caddock’s non-inductive design

_{* Dependant on selected resistor model}

Typical applications for the MG precision high-voltage axial resistor range with extended values include:

TWT HV power supplies
Electron microscopes
E-beam equipment
Electrical distribution HV monitor dividers
X-ray systems
Geophysical instruments
Medical electronics
HV & Compact instrument probes

Caddock MG Extended Range Specification Table

Model No.	Wattage	Max voltage	Coating dielectric strength	Resistance range	Tolerance	TCR
MG717	1.5W	2kV	750AC_rms	600Ω to 225MΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG721	2W	4kV	750AC_rms	200Ω to 300MΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG730	3W	6kV	1000AC_rms	500Ω to 750MΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG731	2.6W	4kV	1000AC_rms	200Ω to 750MΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG735	3.6W	10kV	1000AC_rms	750Ω to 1GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG740	3.6W	6kV	1000AC_rms	300Ω to 1.5GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG745	5W	15kV	1000AC_rms	1kΩ to 1.5GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG750	5W	10kV	1000AC_rms	400Ω to 2.5GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG780	7.5W	15kV	1000AC_rms	600Ω to 3.75GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG785	8W	20kV	1000AC_rms	800Ω to 5GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG810	10W	25kV	1000AC_rms	1kΩ to 6.25GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
MG815	15W	30kV	1000AC_rms	1kΩ to 10GΩ	±1% / ±5%	±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C

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Caddock MX500 Series

Admin — Mon, 23 Nov 2020 20:52:39 +0000

The MX500 series from Caddock are cost effective high voltage resistors for industrial and general purpose applications, with a resistance range from 1MΩ to 1000MΩ and a maximum operating temperature of +175°C. These parts are the RoHS equivalent to the Caddock MX400 series, they have a maximum power rating of up to 10W (MX585 model) and tolerance of ±1.0% standard. The MX500 resistors combine the proven performance of Caddock’s Micronox® resistance system with new cost-efficient design elements and the non-inductive serpentine pattern coated with the high-quality, high-temperature black silicone conformal coating material. These resistors are intended for the design of high voltage systems where the system is not exposed to full military or space grade operating conditions.

High ohmic high voltage axial leaded through-hole resistor
Utilises Caddock’s Micronox® resistance film
Coated with the high-quality, high-temperature black silicone conformal coating material
Lead wires feature Caddock’s standard RoHS compliant axial lead resistor lead wire, a nickel clad copper wire with a thin gold plate
Resistance values available between 1MΩ and 1000MΩ
TCR ±80 ppm/°C (between 0°C and +70°C)
Tolerance of ±1.0% standard
Maximum power rating of up to 10W (MX585 model)
Maximum operating temperature +175°C
Five sizes and power ratings

For full military or space grade operating conditions, we recommend Caddock’s TG Low TC precision high voltage resistors or MG precision high voltage resistors.

The below table gives the specifications available for the complete MX500 resistor series:

1. Power rating (wattage): maximum continuos power in free-air up to +70°C

2. Operating voltage (rms AC or DC): maximum continuos operating voltage applied in free-air up to +70°C, not to exceed rated power

3. Temperature coefficient: 80ppm/°C ref. to +25°C, ΔR taken at 0°C and +70°C

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Caddock USF340 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF340 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 50Ω and 20MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF340 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 50Ω and 20MΩ
TCR of ±5 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 300V
Ceramic package provides cool operation
Maximum power rating of 0.33W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF340 model:

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Caddock USF240 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF240 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 50Ω and 10MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF240 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 50Ω and 10MΩ
TCR of ±2 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 300V
Ceramic package provides cool operation
Maximum power rating of 0.33W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF240 model:

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Caddock USF270 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF270 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 990KΩ and 5MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF270 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 990KΩ and 5MΩ
TCR of ±2 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 1,400V
Ceramic package provides cool operation
Maximum power rating of 0.75W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF270 model:

The post Caddock USF270 Series appeared first on Rhopoint Components.

Caddock USF271 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF271 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 9.9MΩ and 10MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF271 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 9.9MΩ and 10MΩ
TCR of ±2 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 2,500V
Ceramic package provides cool operation
Maximum power rating of 0.75W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF271 model:

The post Caddock USF271 Series appeared first on Rhopoint Components.

Caddock USF370 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF370 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 990KΩ and 10MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF370 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 990KΩ and 10MΩ
TCR of ±5 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 1,400V
Ceramic package provides cool operation
Maximum power rating of 0.75W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF370 model:

The post Caddock USF370 Series appeared first on Rhopoint Components.

Caddock USF371 Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USF371 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 19.8MΩ and 25MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF371 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

Ultra-stable radial leaded film through-hole resistors
Resistance values available are between 19.8MΩ and 25MΩ
TCR of ±5 ppm/°C
Tolerance of ±0.01% or ±0.1%
Temperature range -40°C to +85°C
Maximum working voltage of 2,500V
Ceramic package provides cool operation
Maximum power rating of 0.75W at +85°C
Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

Precise amplifier gain setting
Precise resistor bridge circuits
Precise transducer sense circuits
Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF371 model:

The post Caddock USF371 Series appeared first on Rhopoint Components.

Caddock USFS Series

Admin — Mon, 23 Nov 2020 20:03:23 +0000

The USFS series from Caddock are high voltage, ultra stable, low TCR selected resistor sets. The resistance values available for the complete sets are 30MΩ, 50MΩ and 100MΩ all with a TCR of 2 ppm/°C and a tolerance of ±0.10% for each set. The USFS resistor sets are designed for use in high voltage systems that require the very best temperature and long term stability. These are manufactured with Caddock’s Tetrinox® resistance film system, the individual resistors that form these sets are individually characterised using automated data acquisition systems and then selected to form a set resistance.

Ultra-stable radial leaded film through-hole resistor sets
Sets are available with either 3 or 5 selected USF300 series resistors (model dependent)
Resistance values available for the complete sets are 30MΩ, 50MΩ and 100MΩ
TCR for the complete sets of ±2 ppm/°C
Tolerance for the complete sets of ±0.1%
Temperature range -40°C to +85°C
Voltage coefficient as low as 0.005 ppm/V per resistor set (model dependent)
Ceramic package provides cool operation
Multiple USFS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings
Utilising Caddock’s Tetrinox® resistance film systems

Multiple USFS selected resistor sets can be used in series to form a string of resistors that achieve a higher total resistance and a higher voltage rating with 2 ppm/°C overall temperature coefficient.

The below table gives the specifications available for the complete USFS series:

* Please see the datasheet for the specification notes.

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