RC12JT2M40 Equivalent & Substitute Parts

Part Overview

The RC12JT2M40 is a 2.4 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 production support and legacy system maintenance.

Substiute Parts

RC12JT2M40

Stackpole Electronics IncIn Stock: 1016RC12JT2M40 Datasheet

Current PartRFQ

RC12KT2M40

Stackpole Electronics IncIn Stock: 961RC12KT2M40 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12JT2M40 is determined by the following critical parameters:

• Resistance Value: Must be 2.4 MOhms
• Power Rating: Must be 0.5W (1/2W)
• Package Type: Must be Axial through-hole
• Physical Dimensions: Must match 0.142" Dia × 0.374" L (3.60mm × 9.50mm)
• Composition: Must be Carbon Composition
• Features: Must include Non-Inductive and Pulse Withstanding characteristics
• Operating Temperature Range: Must support -55°C to 125°C
• Compliance: Must maintain ROHS3 compliance

The RC12KT2M40 qualifies as a substitute despite a tolerance difference (±10% versus ±5%) because all other electrical and mechanical parameters remain identical. The tolerance relaxation from ±5% to ±10% represents the primary trade-off in this substitution relationship.

Parameter Comparison

Engineering Selection Recommendations

The RC12KT2M40 is the manufacturer-recommended substitute for the obsolete RC12JT2M40. Both components are manufactured by Stackpole Electronics Inc and maintain identical electrical performance across all critical parameters except tolerance specification.

Selection of the RC12KT2M40 is appropriate for applications where the ±10% tolerance specification is acceptable within circuit design margins. The substitute maintains full compliance with ROHS3 requirements and operates across the identical temperature range (-55°C to 125°C). The active product status of the RC12KT2M40 ensures ongoing availability and supply chain continuity.

The RC12KT2M40 is supplied in Tape & Reel (TR) packaging format, which differs from the standard packaging of the original part. This packaging format is standard for high-volume production environments and does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the RC12KT2M40 be used as a direct replacement for the RC12JT2M40?

A: Yes, the RC12KT2M40 is the manufacturer-recommended substitute. All electrical and mechanical parameters are identical except for tolerance specification, which relaxes from ±5% to ±10%. Direct pin-for-pin and footprint compatibility is maintained.

Q: What is the primary difference between these two parts?

A: The tolerance specification differs. The RC12JT2M40 provides ±5% tolerance, while the RC12KT2M40 provides ±10% tolerance. All other parameters—resistance value, power rating, package type, dimensions, composition, and operating temperature range—are identical.

Q: Does the tolerance difference affect circuit performance?

A: Tolerance impact depends on circuit design requirements. Applications with tight tolerance requirements may require circuit re-evaluation. Applications with tolerance margins of ±10% or greater will experience no functional difference.

Q: Why is the RC12JT2M40 obsolete?

A: The RC12JT2M40 has been discontinued by the manufacturer. The RC12KT2M40 represents the active product line continuation for this resistance value and power rating.

Q: Are there packaging differences between these parts?

A: Yes. The RC12JT2M40 uses standard packaging, while the RC12KT2M40 is supplied in Tape & Reel (TR) format. Both maintain identical axial through-hole physical dimensions (0.142" Dia × 0.374" L). Tape & Reel packaging is standard for production environments and does not affect component functionality or PCB mounting.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RC12JT2M40 and RC12KT2M40 are ROHS3 compliant and REACH unaffected, maintaining identical regulatory compliance profiles.