RC12KB33K0 Equivalent & Substitute Parts

Part Overview

The RC12KB33K0 is a 33 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 classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

RC12KB33K0

Stackpole Electronics IncIn Stock: 1024RC12KB33K0 Datasheet

Current PartRFQ

ASRM1JA33K0

Stackpole Electronics IncIn Stock: 1192ASRM1JA33K0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KB33K0 is determined by the following critical parameters:

• Resistance Value: Must be 33 kOhms
• Package Configuration: Must be axial through-hole format
• Power Rating: Substitute must meet or exceed 0.5W requirement
• Tolerance: Substitute tolerance of ±5% or better is acceptable for applications requiring the original ±10% specification
• Composition Type: Metal film composition is acceptable as a substitute for carbon composition when electrical performance requirements are met
• Compliance: RoHS3 compliance maintained across substitutes
• Operating Temperature Range: Substitute must support the -55°C to 125°C range or broader

The ASRM1JA33K0 meets these substitution criteria with improved specifications in power rating (1W vs. 0.5W), tolerance (±5% vs. ±10%), and composition (metal film with flame retardant coating).

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA33K0 is the manufacturer-recommended substitute for the obsolete RC12KB33K0. Both components are manufactured by Stackpole Electronics Inc and maintain ROHS3 compliance. The substitute provides enhanced specifications including doubled power rating (1W vs. 0.5W), improved tolerance (±5% vs. ±10%), and extended operating temperature range (-55°C to 155°C vs. -55°C to 125°C). The metal film composition with flame retardant coating and safety features represents an active product with ongoing availability, addressing the procurement constraints associated with the obsolete carbon composition original.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA33K0 directly replace the RC12KB33K0 in existing designs?

A: Yes. Both components share identical resistance value (33 kOhms), axial package configuration, and operating temperature minimum (-55°C). The substitute exceeds the original power rating and tolerance specifications, making it suitable for direct substitution in applications designed for the RC12KB33K0.

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

A: The substitute ASRM1JA33K0 provides tighter tolerance (±5%) compared to the original RC12KB33K0 (±10%). This represents improved precision and is acceptable for applications requiring the original specification, as tighter tolerance does not create incompatibility.

Q: How do the composition differences affect performance?

A: The RC12KB33K0 uses carbon composition while the ASRM1JA33K0 uses metal film. Both compositions support the required 33 kOhms resistance value and pulse withstanding characteristics. Metal film composition in the substitute provides improved stability and temperature coefficient performance (0/-1800ppm/°C).

Q: Are both components RoHS compliant?

A: Yes. Both the RC12KB33K0 and ASRM1JA33K0 are ROHS3 compliant, ensuring compatibility with RoHS-regulated applications and supply chains.

Q: What is the availability status of these components?

A: The RC12KB33K0 is classified as obsolete. The ASRM1JA33K0 is an active product with current manufacturing and distribution, providing long-term procurement reliability.