RC12KB470R Equivalent & Substitute Parts

Part Overview

The RC12KB470R is a 470 Ohms ±10% 0.5W 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

RC12KB470R

Stackpole Electronics IncIn Stock: 1031RC12KB470R Datasheet

Current PartRFQ

ASRM12JB470R

Stackpole Electronics IncIn Stock: 684ASRM12JB470R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KB470R is determined by the following critical parameters:

Resistance Value: 470 Ohms (exact match required)

Power Rating: 0.5W minimum (1/2W axial package)

Package Configuration: Axial through-hole format with compatible physical dimensions

Operating Temperature Range: Minimum -55°C to 125°C coverage

Tolerance: The original ±10% tolerance establishes the acceptable accuracy band. Substitute parts with tighter tolerance (±5%) remain functionally compatible as they fall within the original specification envelope.

Composition Flexibility: While the original uses carbon composition, metal film construction is acceptable provided all electrical and thermal parameters are met or exceeded.

The ASRM12JB470R meets all substitution criteria through equivalent resistance, power rating, axial package format, and extended operating temperature range (-55°C to 155°C).

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB470R is the designated manufacturer-recommended substitute for the obsolete RC12KB470R. Selection is based on the following factors:

Product Status: The original RC12KB470R is obsolete. The ASRM12JB470R maintains active production status, ensuring availability for current and future procurement.

Electrical Equivalence: Both components provide 470 Ohms resistance at 0.5W power rating. The substitute's ±5% tolerance is superior to the original ±10%, providing tighter accuracy within the original specification band.

Thermal Performance: The ASRM12JB470R extends the operating temperature range to -55°C to 155°C, exceeding the original -55°C to 125°C specification and providing enhanced thermal margin.

Compliance: Both components are ROHS3 compliant and carry EAR99 ECCN classification, maintaining regulatory alignment for legacy system applications.

Physical Compatibility: Axial package format and through-hole termination ensure direct mechanical and electrical compatibility in existing circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB470R directly replace the RC12KB470R in existing assemblies?

A: Yes. Both components share identical resistance value (470 Ohms), power rating (0.5W), package type (axial), and operating temperature range coverage (-55°C to 125°C). The substitute's tighter tolerance and extended temperature range provide equivalent or improved performance.

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

A: The original RC12KB470R uses carbon composition technology, while the ASRM12JB470R employs metal film construction. Both achieve the specified 470 Ohms resistance and 0.5W power rating. Metal film construction typically offers tighter tolerance (±5% vs. ±10%) and improved temperature stability.

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

A: The RC12KB470R measures 0.142" diameter × 0.374" length (3.60mm × 9.50mm). The ASRM12JB470R measures 0.118" diameter × 0.354" length (3.00mm × 9.00mm). Both are axial through-hole packages with 2 terminations. The substitute is slightly smaller but remains compatible with standard 0.1" pitch circuit board layouts.

Q: Why is the ASRM12JB470R recommended over other potential 470 Ohm resistors?

A: The ASRM12JB470R is the manufacturer-recommended substitute specified by Stackpole Electronics Inc. It maintains the same resistance value, power rating, and package format while providing active product status, improved tolerance, extended temperature range, and regulatory compliance.

Q: What compliance certifications apply to both components?

A: Both the RC12KB470R and ASRM12JB470R are ROHS3 compliant and classified as EAR99 for export control purposes. The REACH status for the original is listed as REACH Unaffected.