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shenzhen kawaxin electronics co.,ltd
CHM CRM Precision High-Value Chip Resistors

CHM CRM Precision High-Value Chip Resistors

Product catalog summary

Overview: This document provides technical specifications and ordering information for CHM and CRM series precision high-value chip resistors manufactured by Shenzhen KWX Electronics Co., Ltd. These resistors are designed for high-temperature and high-voltage applications, suitable for use in high vacuum environments.

Specifications:

Power Ratings: Available in 125mW, 250mW, 350mW, 500mW, 1000mW, and 1500mW.
Size and Dimensions: Various sizes including 0805, 1206, 1210, 2010, 2512, and 4020 with specific length, width, and thickness measurements.
Materials: CHM series uses PtAg for conductive gluing and soldering, while CRM series features a nickel-barrier with matte tin.
Temperature Coefficient of Resistance (TCR): Ranges from ±5ppm/°C to ±5000ppm/°C.
Voltage Coefficient of Resistance (VCR): Typical values are negative and vary depending on TCR.

Performance and Standards:

Operating Temperature Range: -55°C to 155°C.
High Working Voltage: Up to 6000V.
Climatic Category: 55/155/56 according to EN 60068-1.
Solderability: Compliant with EN 60068-2-58 for both lead-free and lead-containing soldering.
Long-term Stability: Load life at 70°C for 1000 hours and storage at 125°C for 1000 hours.

Ordering Information:

Series Name: CHM or CRM.
Power Rating: Specified in mW.
Resistance Tolerance: Options include ±0.5%, ±1%, ±5%, ±10%, ±20%, and ±30%.
Resistance Value: Expressed in ohms, e.g., 100K0 for 100KΩ.
TCR: Specified in ppm/°C.

Features:

Non-magnetic properties (CHM only).
Suitable for high-temperature applications up to 300°C (CHM-HT).
Low temperature and voltage dependency.

Additional Notes: The document includes detailed tables with specific dimensions, tolerances, and performance metrics for various resistor configurations. It also references IEC60068 standards for testing methods.

Catalog excerpts

CHM CRM Precision High-Value Chip Resistors-1

0 Features I Meander structured high value chip resistors in thick film technology II Low temperature and voltage dependency HI High working voltage up to 6000 V IV Suitable for high vacuum applications - no organics V High temperature application up to 300° C possible (CHM-HT) ^ Non-magnetic (CHM only) L — Length, B — Width, D — Thickness, C — Width of wrap around (in mm) CHM--PtAg for conductive glueing and soldering (non-magnetic, high temp. application) Series Name Size Power Resistance Rating Tolerance If no requirements for TCR and taping are given, the standard value (highest value in table) will be supplied and packaging is bulk. Standard measuring voltage is 10V. Different voltages on request and agreement (specify explicitly).

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CHM CRM Precision High-Value Chip Resistors-2

4) Up to 6 months after shipment; longer at storage in Nitrogen Data not specified according to EN 140401-802 (CECC 40401-802)

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