RC14JB120R Equivalent & Substitute Parts

Part Overview

The RC14JB120R is a 120 Ohm ±5% 1/4W axial through-hole 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 classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

RC14JB120R

Stackpole Electronics IncIn Stock: 771RC14JB120R Datasheet

Current PartRFQ

ASRM12JB120R

Stackpole Electronics IncIn Stock: 1047ASRM12JB120R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC14JB120R is determined by the following critical parameters:

• Resistance Value: Must be 120 Ohms
• Tolerance: Must be ±5% or tighter
• Package Type: Must be Axial through-hole configuration
• Power Rating: Must be equal to or greater than 0.25W
• Operating Temperature Range: Must encompass or exceed -55°C to 125°C
• Compliance: Must maintain RoHS3 compliance

The ASRM12JB120R meets all substitution criteria. While it features a higher power rating (0.5W vs. 0.25W) and different composition (metal film vs. carbon composition), these represent functional improvements that maintain backward compatibility in circuit applications. The substitute part operates across an extended temperature range (-55°C to 155°C) and retains all required compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB120R is the manufacturer-recommended substitute for the obsolete RC14JB120R. Both components are manufactured by Stackpole Electronics Inc and maintain identical resistance and tolerance specifications. The substitute part is currently in active production status with 963 units in stock, ensuring supply chain continuity.

The ASRM12JB120R provides functional advantages including doubled power dissipation capacity (0.5W vs. 0.25W), extended operating temperature range (155°C maximum vs. 125°C), and enhanced reliability features including flame retardant coating. Both parts maintain ROHS3 compliance and are suitable for direct substitution in axial through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB120R directly replace the RC14JB120R in existing designs?

A: Yes. Both components share identical resistance (120 Ohms) and tolerance (±5%) specifications. The substitute part features a higher power rating and extended temperature range, making it functionally compatible for direct substitution in axial through-hole circuit positions.

Q: What is the primary difference between these two resistor types?

A: The RC14JB120R uses carbon composition construction, while the ASRM12JB120R uses metal film construction. The metal film substitute provides improved stability, lower temperature coefficient (0/-1800ppm/°C), and enhanced pulse withstanding characteristics.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the RC14JB120R and ASRM12JB120R are ROHS3 compliant and REACH unaffected, meeting current electronic component regulatory requirements.

Q: Why is the RC14JB120R classified as obsolete?

A: The RC14JB120R is an older carbon composition design. The ASRM12JB120R represents the current active equivalent from the same manufacturer, offering improved performance characteristics and ongoing production support.

Q: Are there any physical dimension differences between these parts?

A: Yes. The RC14JB120R measures 0.094" diameter × 0.248" length (2.40mm × 6.30mm), while the ASRM12JB120R measures 0.118" diameter × 0.354" length (3.00mm × 9.00mm). Both use standard axial through-hole packaging and are compatible with standard PCB layouts designed for axial resistor components.