RC12KB47R0 Equivalent & Substitute Parts

Part Overview

The RC12KB47R0 is a 47 Ohm, ±10% tolerance, 0.5W axial through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse withstanding characteristics, designed for applications requiring robust performance across the -55°C to 125°C operating temperature range. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support, maintenance, and new production alternatives.

Substiute Parts

RC12KB47R0

Stackpole Electronics IncIn Stock: 1001RC12KB47R0 Datasheet

Current PartRFQ

ASRM12JB47R0

Stackpole Electronics IncIn Stock: 983ASRM12JB47R0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KB47R0 is determined by the following critical parameters:

• Resistance Value: Must be 47 Ohms (exact match required)
• Power Rating: Must be 0.5W minimum to maintain thermal performance
• Package Type: Must be Axial to ensure mechanical and electrical compatibility
• Operating Temperature Range: Must encompass or exceed -55°C to 125°C
• Compliance: Must maintain ROHS3 compliance for regulatory alignment

The ASRM12JB47R0 qualifies as a direct substitute based on matching resistance, power rating, and axial package configuration. While the substitute features improved tolerance (±5% versus ±10%) and extended temperature capability (-55°C to 155°C), these represent performance enhancements rather than deviations from the original specification.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB47R0 is the manufacturer-recommended substitute for the obsolete RC12KB47R0. Both components are ROHS3 compliant and manufactured by Stackpole Electronics Inc, ensuring regulatory consistency and supply chain continuity.

The substitute part maintains identical resistance and power rating specifications while offering tighter tolerance control (±5% versus ±10%) and extended operating temperature range (-55°C to 155°C versus -55°C to 125°C). The shift from carbon composition to metal film construction provides improved stability and reliability characteristics suitable for modern applications.

For systems currently using the RC12KB47R0, the ASRM12JB47R0 provides direct functional replacement with enhanced performance margins. The active product status of the substitute ensures long-term availability and supply security.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB47R0 directly replace the RC12KB47R0 in existing designs?

A: Yes. Both components share identical resistance value (47 Ohms), power rating (0.5W), and axial package configuration. The substitute meets or exceeds all critical electrical and mechanical parameters of the original part.

Q: What is the significance of the tolerance difference between ±10% and ±5%?

A: The substitute's tighter tolerance (±5%) provides improved resistance value accuracy compared to the original specification (±10%). This represents an enhancement that does not compromise compatibility; circuits designed for ±10% tolerance will operate within specification with a ±5% component.

Q: Why has the RC12KB47R0 been discontinued?

A: The RC12KB47R0 is classified as obsolete. The ASRM12JB47R0 represents the current active equivalent from the same manufacturer, reflecting industry evolution toward metal film resistor technology.

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

A: The RC12KB47R0 measures 0.142" diameter × 0.374" length (3.60mm × 9.50mm), while the ASRM12JB47R0 measures 0.118" diameter × 0.354" length (3.00mm × 9.00mm). Both are axial package format; the substitute is slightly more compact but remains compatible with standard through-hole PCB layouts.

Q: Do both parts maintain the same compliance certifications?

A: Yes. Both the RC12KB47R0 and ASRM12JB47R0 are ROHS3 compliant and REACH unaffected, ensuring regulatory alignment for applications subject to these requirements.