RC12JB7M50 Equivalent & Substitute Parts

Part Overview

The RC12JB7M50 is a 7.5 MOhms ±5% 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 high resistance values with tight tolerance specifications. The part is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

RC12JB7M50

Stackpole Electronics IncIn Stock: 1241RC12JB7M50 Datasheet

Current PartRFQ

RC12KB7M50

Stackpole Electronics IncIn Stock: 884RC12KB7M50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12JB7M50 is determined by the following critical parameters:

Electrical Parameters:

• Resistance value: 7.5 MOhms (exact match required)
• Power rating: 0.5W minimum
• Composition: Carbon composition
• Features: Non-inductive, pulse withstanding capability

Mechanical Parameters:

• Package type: Axial configuration
• Physical dimensions: 0.142" Dia × 0.374" L
• Termination count: 2-pin axial leads

Tolerance Consideration: The RC12JB7M50 specifies ±5% tolerance. Substitute parts with equal or tighter tolerance specifications maintain circuit performance. Parts with relaxed tolerance (±10%) are acceptable only where circuit design permits wider resistance variation.

Compliance Parameters:

• RoHS3 compliance required
• Operating temperature range: -55°C to 125°C minimum

Parameter Comparison

Engineering Selection Recommendations

The RC12KB7M50 is the manufacturer-recommended substitute for the obsolete RC12JB7M50. Both parts share identical electrical specifications, physical dimensions, and compliance certifications. The primary difference is tolerance specification: RC12KB7M50 carries ±10% tolerance versus the original ±5%.

Selection of RC12KB7M50 is appropriate for applications where the circuit design accommodates ±10% resistance variation. The substitute maintains all critical functional characteristics: carbon composition construction, non-inductive properties, pulse withstanding capability, and identical operating temperature range.

The active product status of RC12KB7M50 ensures ongoing availability and supply chain continuity, addressing the obsolescence of the original part.

Frequently Asked Questions (FAQ)

Q: Can RC12KB7M50 be used as a direct replacement for RC12JB7M50?

A: Yes, RC12KB7M50 is the manufacturer-recommended substitute. Both parts have identical resistance values, power ratings, physical dimensions, and package configurations. The tolerance difference (±10% versus ±5%) must be evaluated against circuit requirements.

Q: What is the tolerance difference between these parts?

A: RC12JB7M50 specifies ±5% tolerance, while RC12KB7M50 specifies ±10% tolerance. This means RC12KB7M50 resistance values may vary within a wider range. Substitution is valid only if circuit design permits this wider tolerance band.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.142" diameter × 0.374" length (3.60mm × 9.50mm) in axial configuration. Direct PCB mounting without modification is possible.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both RC12JB7M50 and RC12KB7M50 are ROHS3 compliant and REACH unaffected.

Q: Why is RC12JB7M50 obsolete?

A: RC12JB7M50 is listed as obsolete by the manufacturer. RC12KB7M50, the active substitute, provides equivalent functionality with relaxed tolerance specifications.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -55°C to 125°C, providing identical thermal performance characteristics.