RC12KB47K0 Equivalent & Substitute Parts

Part Overview

The RC12KB47K0 is a 47 kOhms ±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

RC12KB47K0

Stackpole Electronics IncIn Stock: 1017RC12KB47K0 Datasheet

Current PartRFQ

ASRM12JB47K0

Stackpole Electronics IncIn Stock: 778ASRM12JB47K0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KB47K0 is determined by the following critical parameters:

• Resistance Value: Must be 47 kOhms
• Power Rating: Must be 0.5W (1/2W) minimum
• Package Type: Must be Axial for mechanical and electrical compatibility
• Operating Temperature Range: Must encompass or exceed -55°C to 125°C
• Regulatory Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The ASRM12JB47K0 qualifies as a manufacturer-recommended substitute. While it differs in composition (metal film vs. carbon composition) and tolerance (±5% vs. ±10%), these differences represent improvements in performance characteristics. The substitute maintains identical resistance value, power rating, and axial package configuration, with an extended operating temperature range and enhanced regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB47K0 is the manufacturer-recommended substitute for the obsolete RC12KB47K0. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system replacements.

The substitute part offers improved tolerance (±5% vs. ±10%) and an extended operating temperature range (-55°C to 155°C vs. -55°C to 125°C), providing enhanced performance margins in temperature-sensitive applications. The metal film composition with flame retardant coating represents a technological advancement over the original carbon composition design.

For applications where the original carbon composition characteristics are functionally required, alternative carbon composition resistors with matching specifications (47 kOhms, ±10%, 0.5W, axial package) from other manufacturers may be evaluated based on identical electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB47K0 directly replace the RC12KB47K0 in existing designs?

A: Yes. Both components share identical resistance value (47 kOhms), power rating (0.5W), and axial package configuration. The substitute meets or exceeds all critical electrical and mechanical parameters required for functional compatibility.

Q: What is the significance of the tolerance difference (±5% vs. ±10%)?

A: The ASRM12JB47K0 provides tighter tolerance, resulting in more precise resistance values. This represents an improvement over the original specification and does not create compatibility issues in applications designed for the ±10% tolerance of the RC12KB47K0.

Q: Why does the substitute have a higher operating temperature range?

A: The ASRM12JB47K0 extends the upper operating temperature limit to 155°C (vs. 125°C for the RC12KB47K0). This expanded range provides additional thermal margin and does not affect compatibility with applications operating within the original -55°C to 125°C specification.

Q: Are there physical dimension differences between these components?

A: Yes. The RC12KB47K0 measures 0.142" Dia x 0.374" L (3.60mm x 9.50mm), while the ASRM12JB47K0 measures 0.118" Dia x 0.354" L (3.00mm x 9.00mm). The substitute is slightly smaller, which may affect board layout in space-constrained applications but does not impact electrical performance.

Q: Do both components maintain the same regulatory compliance?

A: Yes. Both the RC12KB47K0 and ASRM12JB47K0 are ROHS3 compliant and REACH unaffected, ensuring compliance with current environmental and safety regulations.