RC12JB220R Equivalent & Substitute Parts

Part Overview

The RC12JB220R is a 220 Ohms ±5% 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 currently obsolete, making equivalent and substitute parts necessary for ongoing circuit maintenance, repair, and legacy system support.

Substiute Parts

RC12JB220R

Stackpole Electronics IncIn Stock: 1067RC12JB220R Datasheet

Current PartRFQ

ASRM12JB220R

Stackpole Electronics IncIn Stock: 1034ASRM12JB220R Datasheet

MFR RecommendedRFQ

RC12KB220R

Stackpole Electronics IncIn Stock: 860RC12KB220R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RC12JB220R is determined by the following critical parameters: resistance value (220 Ohms), tolerance (±5%), power rating (0.5W), and axial package configuration. The substitute parts identified maintain these core electrical specifications while differing in composition type and operating temperature range.

The two substitute parts are grouped as follows:

ASRM12JB220R: Maintains identical resistance, tolerance, and power rating with an upgraded composition (metal film instead of carbon composition) and extended operating temperature range (-55°C to 155°C). This part is active in production status.

RC12KB220R: Maintains identical resistance and power rating with relaxed tolerance (±10% versus ±5%) and identical carbon composition. This part is also obsolete.

Parameter Comparison

Engineering Selection Recommendations

ASRM12JB220R is the preferred substitute for new designs and long-term applications. This part maintains the required ±5% tolerance specification, is currently in active production status, and offers an extended operating temperature range of -55°C to 155°C. The metal film composition with flame retardant coating provides enhanced reliability characteristics compared to the obsolete carbon composition original.

RC12KB220R is suitable only when tolerance relaxation to ±10% is acceptable for the application. Both the main part and this substitute are obsolete, limiting long-term availability. This option should be considered only for temporary repairs or when the application circuit tolerates the wider tolerance specification.

Frequently Asked Questions (FAQ)

Q: Can ASRM12JB220R directly replace RC12JB220R in all applications?

A: ASRM12JB220R maintains the critical electrical parameters (220 Ohms, ±5%, 0.5W, axial package) required for direct substitution. The metal film composition and extended temperature range represent improvements over the original carbon composition design. Physical dimensions differ slightly (0.118" Dia x 0.354" L versus 0.142" Dia x 0.374" L), which may require verification in space-constrained layouts.

Q: What is the tolerance difference between RC12JB220R and RC12KB220R?

A: RC12JB220R specifies ±5% tolerance, while RC12KB220R specifies ±10% tolerance. This means RC12KB220R allows a wider resistance variation range. Selection between these depends on circuit requirements for precision.

Q: Why is ASRM12JB220R preferred despite composition differences?

A: ASRM12JB220R is in active production status, ensuring ongoing availability, whereas both RC12JB220R and RC12KB220R are obsolete. The metal film composition with flame retardant coating meets modern safety and reliability standards while maintaining all critical electrical specifications.

Q: Are there physical dimension constraints when substituting?

A: Yes. ASRM12JB220R measures 0.118" Dia x 0.354" L, while RC12JB220R measures 0.142" Dia x 0.374" L. Both RC12KB220R and RC12JB220R share identical dimensions. Verify PCB layout and component spacing before substitution in space-limited applications.

Q: Do all substitute parts meet RoHS compliance?

A: RC12JB220R and RC12KB220R are both ROHS3 Compliant. RoHS status for ASRM12JB220R is not specified in the provided data.