RC1KB2K20 Equivalent & Substitute Parts

Part Overview

The RC1KB2K20 is a 2.2 kOhms ±10% 1W through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse-withstanding characteristics, with an operating temperature range of -55°C to 125°C. The product is currently obsolete, making identification of suitable substitute components necessary for ongoing maintenance, repair, and legacy system support. Equivalent parts must maintain the same resistance value, power rating, and axial package configuration while meeting applicable compliance standards.

Substiute Parts

RC1KB2K20

Stackpole Electronics IncIn Stock: 1184RC1KB2K20 Datasheet

Current PartRFQ

ASRM1JA2K20

Stackpole Electronics IncIn Stock: 907ASRM1JA2K20 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1KB2K20 is based on the following critical parameters:

• Resistance Value: 2.2 kOhms (exact match required)
• Power Rating: 1W (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Tolerance: ±10% or tighter (±5% acceptable as improvement)
• Operating Temperature Range: Minimum -55°C to 125°C coverage
• Compliance: ROHS3 compliance maintained

The ASRM1JA2K20 qualifies as a direct substitute based on matching resistance, power rating, and axial package. While it employs metal film composition instead of carbon composition, it maintains superior tolerance (±5%), extended operating temperature range (-55°C to 155°C), and equivalent pulse-withstanding capability with flame retardant coating.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA2K20 is the qualified substitute for the obsolete RC1KB2K20. Both components are manufactured by Stackpole Electronics Inc and maintain ROHS3 compliance. The substitute offers improved tolerance specification (±5% versus ±10%), extended operating temperature range (155°C maximum versus 125°C), and active product status ensuring continued availability. The metal film composition with flame retardant coating provides enhanced safety characteristics while maintaining equivalent pulse-withstanding performance. Physical dimensions differ slightly (4.00mm × 11.00mm versus 5.70mm × 14.30mm), requiring verification of board layout compatibility in legacy applications.

Frequently Asked Questions (FAQ)

Q: Can ASRM1JA2K20 directly replace RC1KB2K20 in all applications?

A: Yes, for applications requiring 2.2 kOhms ±10% 1W axial resistors. The substitute meets or exceeds all critical electrical parameters. Physical dimension differences must be verified against available board space.

Q: What is the primary difference between these two resistors?

A: RC1KB2K20 uses carbon composition construction with ±10% tolerance, while ASRM1JA2K20 uses metal film construction with ±5% tolerance. Both maintain 1W power rating and axial package configuration.

Q: Why is the substitute part smaller in physical size?

A: Metal film resistors achieve the same power rating in a more compact form factor compared to carbon composition resistors. The ASRM1JA2K20 measures 4.00mm × 11.00mm versus 5.70mm × 14.30mm for the RC1KB2K20.

Q: Are both parts RoHS compliant?

A: Yes, both RC1KB2K20 and ASRM1JA2K20 are ROHS3 compliant.

Q: What is the temperature coefficient difference?

A: RC1KB2K20 does not specify a temperature coefficient. ASRM1JA2K20 specifies 0/-1800ppm/°C, indicating superior temperature stability typical of metal film construction.

Q: Is the substitute part currently available?

A: Yes, ASRM1JA2K20 is active product status with 863 pieces in stock, whereas RC1KB2K20 is obsolete.