TWM3J43R Equivalent & Substitute Parts

Part Overview

The TWM3J43R is a 43 Ohm, 5%, 3W through-hole resistor manufactured by Ohmite in the TWM series. This component features metal oxide film construction with flame-proof and safety characteristics, designed for radial mounting applications. The TWM3J43R is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The active equivalent TWM3J43RE provides functional replacement with improved compliance status.

Substiute Parts

TWM3J43R

OhmiteIn Stock: 757TWM3J43R Datasheet

Current PartRFQ

TWM3J43RE

OhmiteIn Stock: 1086TWM3J43RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TWM3J43R is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 43 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Metal Oxide Film
• Package configuration: Radial
• Operating temperature range: -55°C to 275°C
• Temperature coefficient: ±350ppm/°C
• Physical dimensions and termination count

The TWM3J43RE meets all these criteria and serves as a direct functional equivalent. Packaging differences (bulk vs. standard) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TWM3J43RE is the direct equivalent for the obsolete TWM3J43R. Both components are manufactured by Ohmite and share identical electrical specifications, thermal characteristics, and physical dimensions. The primary distinction is product status and regulatory compliance: the TWM3J43R is obsolete and RoHS non-compliant, while the TWM3J43RE is active and ROHS3 compliant. For new designs or production requiring regulatory compliance, the TWM3J43RE is the appropriate selection. For legacy system maintenance where the original part is unavailable, the TWM3J43RE provides full functional and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can TWM3J43RE be used as a direct replacement for TWM3J43R in existing designs?

A: Yes. The TWM3J43RE is electrically and mechanically identical to the TWM3J43R. All electrical parameters, thermal characteristics, and physical dimensions are equivalent. The components are pin-compatible and require no circuit modifications.

Q: What is the difference between TWM3J43R and TWM3J43RE?

A: The TWM3J43R is obsolete and RoHS non-compliant. The TWM3J43RE is the active production equivalent with ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The TWM3J43R and TWM3J43RE use identical radial package configurations with the same physical dimensions (0.492" L x 0.354" W, 1.024" max height). Packaging format (bulk vs. standard) does not affect component compatibility or performance.

Q: What are the key parameters that define substitution for this resistor?

A: Substitution is determined by resistance value (43 Ohms), tolerance (±5%), power rating (3W), composition (metal oxide film), package type (radial), operating temperature range (-55°C to 275°C), and physical dimensions. All these parameters must match for functional equivalence.

Q: Is the TWM3J43RE suitable for applications requiring RoHS compliance?

A: Yes. The TWM3J43RE is ROHS3 compliant, making it suitable for applications with RoHS requirements. The obsolete TWM3J43R is RoHS non-compliant.