RC12JB100R Equivalent & Substitute Parts

Part Overview

The RC12JB100R is a 100 Ohms ±5% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse withstanding characteristics, designed for applications requiring robust performance across industrial temperature ranges. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing procurement and system maintenance.

Substiute Parts

RC12JB100R

Stackpole Electronics IncIn Stock: 1032RC12JB100R Datasheet

Current PartRFQ

ASRM12JB100R

Stackpole Electronics IncIn Stock: 1172ASRM12JB100R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12JB100R is determined by the following critical parameters:

• Resistance value: 100 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)
• Operating temperature range: minimum -55°C ~ 125°C (substitute must meet or exceed)
• RoHS compliance: ROHS3 Compliant (maintained)

The ASRM12JB100R qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the substitute uses metal film composition instead of carbon composition, both materials satisfy the specified resistance, tolerance, power rating, and package requirements. The substitute's extended operating temperature range (-55°C ~ 155°C) exceeds the original specification, providing enhanced thermal performance.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB100R is the qualified substitute for the obsolete RC12JB100R. Selection is based on the following factors:

• Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment
• The substitute is currently active in production, providing long-term availability compared to the obsolete main part
• Electrical specifications (resistance, tolerance, power rating) are identical
• Axial package configuration remains unchanged, supporting direct board-level replacement
• The substitute's extended operating temperature range (-55°C ~ 155°C) provides additional thermal margin beyond the original specification (-55°C ~ 125°C)
• Physical dimensions are slightly smaller in the substitute, which may require PCB layout verification for applications with tight spacing constraints

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB100R directly replace the RC12JB100R in existing designs?

A: The ASRM12JB100R meets all critical electrical and mechanical specifications required for substitution. The axial package configuration, resistance value, tolerance, and power rating are identical. Physical dimensions are slightly smaller (0.118" Dia x 0.354" L versus 0.142" Dia x 0.374" L), which should not impact most applications but should be verified for designs with tight component spacing.

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

A: The main difference is composition: RC12JB100R uses carbon composition, while ASRM12JB100R uses metal film with flame retardant coating. Both compositions satisfy the specified electrical parameters. The substitute offers an extended operating temperature range (155°C maximum versus 125°C).

Q: Why is the RC12JB100R listed as obsolete?

A: The RC12JB100R is classified as obsolete by the manufacturer. The ASRM12JB100R is the active equivalent, ensuring continued availability for new procurement and system maintenance.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Regulatory compliance is maintained with the substitute.

Q: What should be considered when implementing this substitution?

A: Verify PCB layout compatibility due to the slightly smaller physical dimensions of the substitute. Confirm that the extended operating temperature range of the substitute (-55°C ~ 155°C) is acceptable for the application. Both parts are axial through-hole components with identical termination counts, supporting direct replacement.