SRT CHR 4020 Series

Product Features

Non-magnetic thick film chip resistor
Resistance range from 1Ω to 10MΩ
Tolerances from ±0.5% to ±20%
TCR from ±50 ppm/°C to ±250 ppm/°C
Power rating of 2W (at +70°C)
Temperature range from -55°C up to +155°C

Applications

The CHR 4020 non-magnetic resistor series from SRT Resistor Technology offers a wide resistance range from 1Ω up to 10MΩ, power rating of 2W³⁾ and voltage rating of 500V trimmed or 1500V untrimmed (tolerances ≥5%), all in a small 4020 surface mount package. By utilising SRT’s thick film resistor technology, they are able to offer low tolerances down to ±0.5% (between 100Ω and 1MΩ) and TCR as low as ±50 ppm/°C (between +25°C and +85°C). The CHR 4020 resistor series contains no organics making them suitable for high vacuum applications and offer PtAg (platinum silver) terminations for conductive gluing and soldering.

Surface-mount thick film chip resistor
Available in any resistance between 1Ω and 10MΩ
4020 package
Power rating of 2W³⁾ at +70°C
Voltage rating of 500V trimmed or 1500V untrimmed (tolerances ≥5%)
Tolerances as low as ±0.5% over the resistance range of 100Ω up to 1MΩ
TCR as low as ±50 ppm/°C over the resistance range of 10Ω to 10MΩ
Temperature range from -55°C up to +155°C
Non-magnetic
PtAg (platinum silver) terminations for conductive gluing and soldering
RF versions available (untrimmed resistors)
No organics

Zero ohm jumper option available with a resistance value of less than 0.05Ω.

The CHR non-magnetic resistor series is also available with an extended high temperature range version (up to +300°C). Please see the separate CHR-HT product pages for further information.

Custom tolerance, TCR and VCR options are available upon request. Please contact us for further information and availability.

The below table gives full specifications for each resistor model available including the CHR 4020 series:

¹⁾ TCR: in ppm/K; +25°C…+125°C; TCR below standard TCR (highest value): +25°C…+85°C
²⁾ Continuous operating voltage (U_, U_eff): V ≤ √(P*R) or max. working voltage (the lower value)
³⁾ At continuous power dissipation the dimensions of solder-pads have to secure a sufficient heat removal Power Mode: 2W as CHR 2512-HT (P₇₀=2W, P₃₀₀=0W) and 3W as CHR 4020-HT (P₇₀=3W, P₃₀₀=0W) respectively. Higher power rating requires an adequate heat removal (e.g. increased solder pads or Copper thicknesses). The user has to guarantee, that solder joints will not run over their load limit. The resistor must not exceed the specified operating temperature range

SRT CHR 4020 Series

Resistance Value
Temperature Coefficient
Tolerance
Clear

Custom resistance value (Ω) *
Custom AT Range (AT) *
Custom Capacity (lbs) *
Custom Pressure (Bar/PSI) *
Custom Resistance Value Element 1 (Ω) *
Custom Resistance Value Element 2 (Ω) *
Custom lead length (mm) *
Custom lead length (inches) *

Quantity

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Specifications

Weight	0.00000 kg
Dimensions	0.60 x 5.10 x 10.20mm
Maximum Resistance	10MΩ
Minimum Resistance	1Ω
Package / Size	Surface-mount, 4020
Power Rating	2W
Product Type	Thick Film, Non-Magnetic, Resistor
Resistance Value	Custom (1Ω – 10Ω), Custom (10Ω – 100Ω), Custom (100Ω – 1MΩ), Custom (1MΩ – 10MΩ)
Series / Model	CHR
Temperature Coefficient	±50 ppm/°C, ±100 ppm/°C, ±250 ppm/°C
Temperature Range (°C)	-55 to +155°C
Termination / Connection	PtAg
Tolerance	±0.5%, ±1%, ±2%, ±5%, ±10%, ±20%

RoHS Compliant Product – SRT with Exemption

This product is available compliant to the RoHS EU directive 2011/65/EU, however, the following exemptions according to the RoHS annex are applicable:

No. 7(a) – 'Lead in high melting temperature type solders (i.e. lead-based alloys containing 85% by weight or more lead)' used in leaded resistors
No. 7(c)-I – 'Electrical and electronic components containing lead in glass or ceramic…or in a glass or ceramic matrix compound' used in chip resistors and leaded thick film resistors

SRT CHR Technical Library

We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:

DOCUMENTATION
	SRT CHR high ohmic SMD chip resistor datasheet