RC12KB100R Equivalent & Substitute Parts

Part Overview

The RC12KB100R is a 100 Ohms ±10% 0.5W 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 currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

RC12KB100R

Stackpole Electronics IncIn Stock: 781RC12KB100R Datasheet

Current PartRFQ

ASRM12JB100R

Stackpole Electronics IncIn Stock: 1172ASRM12JB100R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KB100R is determined by the following critical parameters:

• Resistance value: 100 Ohms (exact match required)
• Power rating: 0.5W minimum (equal or greater acceptable)
• Package type: Axial configuration (mechanical and electrical compatibility)
• Operating temperature range: Must encompass or exceed -55°C to 125°C
• Regulatory compliance: ROHS3 compliance maintained

The ASRM12JB100R qualifies as a substitute based on matching resistance, power rating, axial package, and regulatory compliance. The substitute offers improved tolerance (±5% versus ±10%) and extended operating temperature range (-55°C to 155°C), providing enhanced performance characteristics while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB100R is the manufacturer-recommended substitute for the obsolete RC12KB100R. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute is currently in active production with confirmed inventory availability (1089 pcs), whereas the original part is obsolete with limited stock (699 pcs).

The ASRM12JB100R provides functional equivalence with the following advantages: tighter tolerance specification (±5%), extended operating temperature range (155°C maximum versus 125°C), and metal film composition with flame retardant coating. The axial package configuration ensures direct mechanical compatibility in existing PCB layouts and through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB100R directly replace the RC12KB100R in existing designs?

A: Yes. Both components share identical resistance values (100 Ohms), power ratings (0.5W), and axial package configurations. The substitute meets or exceeds all critical electrical and mechanical parameters required for functional equivalence.

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 precision and thermal performance.

Q: Are there any compatibility concerns with the different physical dimensions?

A: The ASRM12JB100R has slightly smaller dimensions (0.118" Dia x 0.354" L versus 0.142" Dia x 0.374" L). This reduction in size presents no compatibility issues for through-hole mounting and may provide improved board layout flexibility.

Q: Why is the original RC12KB100R obsolete?

A: The RC12KB100R is classified as obsolete by the manufacturer. The ASRM12JB100R represents the current active product line offering equivalent functionality with enhanced specifications.

Q: Do both parts maintain the same regulatory certifications?

A: Yes. Both the RC12KB100R and ASRM12JB100R are ROHS3 compliant and REACH unaffected, ensuring compliance with current environmental and safety regulations.