RC12KB100K Equivalent & Substitute Parts

Part Overview

The RC12KB100K is a 100 kOhms ±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 equivalent substitutes necessary for ongoing applications and new designs requiring compatible performance parameters.

Substiute Parts

RC12KB100K

Stackpole Electronics IncIn Stock: 796RC12KB100K Datasheet

Current PartRFQ

ASRM12JB100K

Stackpole Electronics IncIn Stock: 957ASRM12JB100K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASRM12JB100K qualifies as a manufacturer-recommended substitute for the RC12KB100K based on the following substitution criteria:

Matching Parameters:

• Resistance value: 100 kOhms (identical)
• Power rating: 0.5W (1/2W) (identical)
• Package type: Axial (identical)
• Number of terminations: 2 (identical)
• Manufacturer: Stackpole Electronics Inc (same source)

Allowable Variations:

• Tolerance: ±5% (tighter than ±10% original specification, acceptable for applications requiring the original tolerance or better)
• Composition: Metal Film (alternative to Carbon Composition, maintains electrical performance at rated specifications)
• Operating temperature: -55°C ~ 155°C (extended upper range, backward compatible)
• Temperature coefficient: 0 / -1800ppm/°C (specified for metal film type)

The substitute maintains functional equivalence through identical resistance, power rating, and package configuration while offering improved tolerance and extended temperature capability.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB100K is the manufacturer-recommended substitute for the obsolete RC12KB100K. Selection of this substitute is based on:

Product Status: The RC12KB100K is obsolete, while the ASRM12JB100K is active and available in production quantities (927 Pcs in stock).

Compliance: Both parts maintain ROHS3 compliance status, ensuring regulatory alignment for applications subject to RoHS requirements.

Electrical Equivalence: Identical resistance value and power rating ensure direct functional replacement in circuit applications. The tighter ±5% tolerance of the substitute provides equal or improved performance compared to the ±10% specification of the original part.

Thermal Performance: The extended operating temperature range (-55°C ~ 155°C) of the substitute accommodates all applications within the original temperature specification (-55°C ~ 125°C).

Physical Compatibility: Identical axial package configuration and termination count enable direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB100K directly replace the RC12KB100K in existing designs?

A: Yes. Both parts share identical resistance value, power rating, package type, and termination configuration. The substitute's tighter tolerance and extended temperature range provide equal or improved performance.

Q: What is the difference between carbon composition and metal film resistor types?

A: Carbon composition resistors (RC12KB100K) use a carbon-based resistive element, while metal film resistors (ASRM12JB100K) use a thin metal film. Metal film resistors typically offer tighter tolerance, lower temperature coefficient, and better frequency response. Both types are suitable for general-purpose applications at the specified power rating.

Q: Does the ±5% tolerance of the substitute affect circuit performance?

A: The ±5% tolerance of the ASRM12JB100K is tighter than the ±10% specification of the RC12KB100K. This provides equal or improved accuracy for applications designed to the original ±10% tolerance specification.

Q: Are there any thermal considerations when substituting these parts?

A: The ASRM12JB100K operates to 155°C, exceeding the original 125°C maximum. Both parts are suitable for applications within the original -55°C ~ 125°C range. No thermal derating is required for equivalent operating conditions.

Q: What is the physical size difference between these parts?

A: RC12KB100K: 0.142" Dia x 0.374" L (3.60mm x 9.50mm). ASRM12JB100K: 0.118" Dia x 0.354" L (3.00mm x 9.00mm). The substitute is slightly smaller, ensuring compatibility with existing board layouts.

Q: Are both parts RoHS compliant?

A: The RC12KB100K is ROHS3 compliant. RoHS compliance status for the ASRM12JB100K is not specified in the provided data. Verify compliance requirements with the manufacturer or supplier for specific applications.