Ohmite 45J56R 56 Ohm 5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 45J56R is a 56 Ohm, 5% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact axial form factor. The part maintains Active product status with 1039 units in current inventory. Substitute parts are identified when original stock becomes unavailable or when packaging requirements differ while maintaining identical electrical and mechanical specifications.

Substiute Parts

45J56R

OhmiteIn Stock: 114545J56R Datasheet

Current PartRFQ

45J56RE

OhmiteIn Stock: 75145J56RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45J56R is determined by strict equivalence across the following critical parameters:

• Resistance value: 56 Ohms
• Tolerance: ±5%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Number of terminations: 2

The identified substitute part 45J56RE maintains complete electrical and mechanical equivalence across all specified parameters. Substitution differences are limited to packaging format (Bulk vs. standard) and compliance certifications, which do not affect functional performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J56R and 45J56RE are Active products from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

45J56R is appropriate for applications where standard packaging is required and RoHS non-compliant components are acceptable per design specifications.

45J56RE is appropriate for applications requiring RoHS compliance or bulk packaging formats. This part provides the same electrical performance with enhanced compliance certification status.

Both parts are suitable for direct substitution in circuit designs where the 56 Ohm, 5W, ±5% tolerance axial wirewound resistor specification is required. Packaging format and compliance requirements are the only differentiating factors between these equivalent components.

Frequently Asked Questions (FAQ)

Q: Can 45J56RE be used as a direct replacement for 45J56R?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (56 Ohms), tolerance (±5%), power rating (5W), composition (wirewound), package type (axial), and physical dimensions (0.343" Dia x 0.937" L). The only differences are packaging format and RoHS compliance status.

Q: What is the difference between the packaging formats?

A: The 45J56R uses standard packaging, while the 45J56RE uses bulk packaging. Both formats contain the same component with identical specifications. Packaging format selection depends on procurement and inventory management requirements.

Q: Does RoHS compliance affect circuit performance?

A: No. RoHS compliance is a material composition and manufacturing standard that does not alter the electrical or thermal performance of the resistor. Both parts deliver identical functional characteristics in circuit applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm). They are mechanically interchangeable in PCB layouts and through-hole applications.

Q: What is the operating temperature range?

A: The 45J56RE specifies an operating range of -55°C to 275°C. The 45J56R does not provide an explicit operating temperature range in available documentation. Both parts maintain the same ±20ppm/°C temperature coefficient.

Q: Can these parts be used interchangeably in new designs?

A: Yes. Both parts meet the specification for a 56 Ohm, 5W, ±5% tolerance axial wirewound resistor. Design selection should consider RoHS compliance requirements and packaging preferences.