RC1KB150K Equivalent & Substitute Parts

Part Overview

The RC1KB150K is a 150 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

RC1KB150K

Stackpole Electronics IncIn Stock: 968RC1KB150K Datasheet

Current PartRFQ

ASRM1JA150K

Stackpole Electronics IncIn Stock: 1027ASRM1JA150K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1KB150K is determined by the following critical parameters:

• Resistance Value: 150 kOhms (exact match required)
• Power Rating: 1W (exact match required)
• Package Type: Axial (exact match required)
• Tolerance: ±10% or better (±5% is acceptable as a tighter specification)
• Operating Temperature Range: Minimum -55°C to 125°C coverage
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The ASRM1JA150K meets all substitution criteria with improved specifications in tolerance (±5% versus ±10%) and extended upper operating temperature (155°C versus 125°C). Both components share identical resistance, power rating, and axial package configuration.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA150K is a direct functional substitute for the RC1KB150K. Both components are manufactured by Stackpole Electronics Inc and maintain ROHS3 compliance and REACH unaffected status. The substitute offers improved tolerance specification (±5% versus ±10%) and extended operating temperature range (-55°C to 155°C versus -55°C to 125°C), making it suitable for applications requiring tighter resistance accuracy or higher temperature operation.

The primary consideration is the physical dimension difference: the ASRM1JA150K is smaller (4.00mm diameter × 11.00mm length versus 5.70mm diameter × 14.30mm length). PCB layout and mechanical clearance must be evaluated to confirm compatibility with the original design. The composition change from carbon composition to metal film may affect circuit behavior in applications sensitive to noise characteristics or frequency response, though both compositions meet the specified 1W power rating and pulse-withstanding requirements.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA150K directly replace the RC1KB150K in all applications?

A: The ASRM1JA150K is electrically compatible as a 150 kOhms 1W axial resistor. Physical dimensions differ, requiring verification of PCB layout and mechanical clearance. Composition change from carbon to metal film may affect performance in noise-sensitive circuits.

Q: What is the significance of the tolerance difference between ±10% and ±5%?

A: The ±5% tolerance of the ASRM1JA150K provides tighter resistance accuracy compared to the ±10% specification of the RC1KB150K. This is beneficial for precision circuits but does not prevent substitution in applications designed for ±10% tolerance.

Q: Are both parts RoHS compliant?

A: Yes, both the RC1KB150K and ASRM1JA150K are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Why is the RC1KB150K listed as obsolete?

A: The RC1KB150K is an older carbon composition resistor design. Stackpole Electronics Inc continues to manufacture the ASRM1JA150K as an active product with improved specifications and modern manufacturing standards.

Q: Does the smaller size of the ASRM1JA150K affect its performance?

A: The smaller dimensions do not affect electrical performance. Both components are rated for 1W power dissipation and meet pulse-withstanding requirements. Size difference is a mechanical consideration only.

Q: What is the temperature coefficient difference, and does it matter?

A: The ASRM1JA150K specifies a temperature coefficient of 0/-1800ppm/°C, while the RC1KB150K does not provide this specification. For applications operating across the full temperature range, the ASRM1JA150K's specified temperature coefficient provides predictable resistance variation.