RC1KB100K Equivalent & Substitute Parts

Part Overview

The RC1KB100K is a 100 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 essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

RC1KB100K

Stackpole Electronics IncIn Stock: 910RC1KB100K Datasheet

Current PartRFQ

ASRM1JA100K

Stackpole Electronics IncIn Stock: 9779ASRM1JA100K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1KB100K is determined by the following critical parameters:

• Resistance Value: 100 kOhms (exact match required)
• Power Rating: 1W (minimum requirement)
• Package Type: Axial (mechanical and electrical interface requirement)
• Operating Temperature Range: Must support -55°C to 125°C minimum
• Regulatory Compliance: ROHS3 compliance maintained

The ASRM1JA100K qualifies as a direct substitute based on matching resistance, power rating, axial package configuration, and regulatory compliance. While the substitute features improved tolerance (±5% versus ±10%) and extended temperature capability (-55°C to 155°C), these represent enhancements rather than deviations from the original specification.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA100K is the qualified substitute for the obsolete RC1KB100K. Both components maintain ROHS3 compliance and REACH unaffected status. The substitute is currently in active production with 9768 units available in inventory, compared to the main part's obsolete status with limited stock of 886 units.

The ASRM1JA100K provides superior tolerance performance (±5% versus ±10%) and extended operating temperature capability (-55°C to 155°C versus -55°C to 125°C), ensuring compatibility with the original specification while offering improved performance margins. The metal film composition of the substitute provides enhanced stability compared to the carbon composition of the original part.

Physical dimensions differ slightly, with the substitute measuring 0.157" diameter by 0.433" length versus the original 0.224" diameter by 0.563" length. This dimensional reduction may require PCB layout verification for applications with space constraints.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA100K directly replace the RC1KB100K in all applications?

A: Yes, the ASRM1JA100K meets or exceeds all critical electrical parameters of the RC1KB100K. Both components share identical resistance value (100 kOhms), power rating (1W), axial package configuration, and regulatory compliance (ROHS3). Physical dimensions differ slightly; verify PCB layout compatibility before implementation.

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

A: The main differences are composition (carbon composition versus metal film), tolerance (±10% versus ±5%), and operating temperature range (-55°C to 125°C versus -55°C to 155°C). The substitute offers improved tolerance and extended temperature capability.

Q: Why is the RC1KB100K obsolete?

A: The RC1KB100K is classified as obsolete by the manufacturer. The ASRM1JA100K represents the current active production equivalent from Stackpole Electronics Inc.

Q: Are there any compatibility concerns with the smaller physical dimensions of the ASRM1JA100K?

A: The ASRM1JA100K is physically smaller (0.157" Dia x 0.433" L) than the RC1KB100K (0.224" Dia x 0.563" L). Verify that the substitute component fits within the available PCB space and does not interfere with adjacent components or mechanical assemblies.

Q: Do both resistors meet the same regulatory requirements?

A: Yes, both the RC1KB100K and ASRM1JA100K are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99.