RC12KT220R Equivalent & Substitute Parts

Part Overview

The RC12KT220R is a 220 Ohms ±10% 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 classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

RC12KT220R

Stackpole Electronics IncIn Stock: 686RC12KT220R Datasheet

Current PartRFQ

ASRM1JA220K

Stackpole Electronics IncIn Stock: 1048ASRM1JA220K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12KT220R requires evaluation against the following critical parameters:

Resistance Value: The substitute must provide 220 Ohms nominal resistance. The RC12KT220R operates at 220 Ohms; however, the listed substitute ASRM1JA220K specifies 220 kOhms (220,000 Ohms), representing a 1000x difference in resistance value. This fundamental mismatch in electrical specification prevents direct substitution.

Power Rating: The RC12KT220R is rated at 0.5W. The substitute ASRM1JA220K is rated at 1W, which exceeds the original specification and is acceptable from a power dissipation standpoint.

Tolerance: The RC12KT220R operates at ±10% tolerance. The substitute ASRM1JA220K provides ±5% tolerance, which is tighter and acceptable.

Package Configuration: Both components utilize axial through-hole packaging, ensuring mechanical and footprint compatibility.

Composition and Features: The RC12KT220R is carbon composition with non-inductive and pulse withstanding characteristics. The substitute ASRM1JA220K is metal film with flame retardant coating, pulse withstanding, and safety features, representing a different technology class.

Compliance: Both components are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA220K cannot serve as a direct substitute for the RC12KT220R due to a critical resistance value mismatch. The substitute specifies 220 kOhms while the original part specifies 220 Ohms—a 1000-fold difference that would render the substitute non-functional in the original circuit application.

For applications requiring an active, ROHS3-compliant axial resistor with 220 Ohms resistance, alternative components from the active product portfolio must be evaluated. The ASRM1JA220K is suitable only for applications requiring 220 kOhms resistance with the specified tolerance, power rating, and temperature range.

Both components meet modern regulatory compliance standards (ROHS3, REACH unaffected), ensuring environmental and safety conformance for new designs.

Frequently Asked Questions (FAQ)

Q: Can ASRM1JA220K replace RC12KT220R in my circuit?

A: No. The ASRM1JA220K specifies 220 kOhms resistance, while the RC12KT220R specifies 220 Ohms. This 1000x difference in resistance value makes the substitute incompatible with the original application.

Q: What is the primary reason for seeking a substitute for RC12KT220R?

A: The RC12KT220R is classified as obsolete. Active component alternatives with matching electrical specifications (220 Ohms, 0.5W, axial package) must be identified for procurement and design continuity.

Q: Are the package types compatible between these two resistors?

A: Yes. Both RC12KT220R and ASRM1JA220K utilize axial through-hole packaging, ensuring mechanical and footprint compatibility. However, package compatibility alone does not qualify a substitute when electrical specifications differ.

Q: What are the key parameters that determine resistor substitution?

A: Resistance value, tolerance, power rating, operating temperature range, and package type are the primary parameters governing resistor substitution. Composition type (carbon composition vs. metal film) may also influence performance in specific applications.

Q: Is ASRM1JA220K an active product?

A: Yes. ASRM1JA220K is classified as active with 1005 pieces in stock, providing superior availability compared to the obsolete RC12KT220R.