Ohmite 45J2R0 2 Ohm 5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 45J2R0 is a 2 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 is currently active in production with 1078 units in stock. Substitute parts may be required due to packaging preferences, compliance requirements, or inventory availability across different distribution channels.

Substiute Parts

45J2R0

OhmiteIn Stock: 115045J2R0 Datasheet

Current PartRFQ

45J2R0E

OhmiteIn Stock: 87145J2R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45J2R0 is determined by strict equivalence across the following critical parameters:

• Resistance Value: 2 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power Rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package Type: Axial (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Physical Dimensions: 0.343" Dia x 0.937" L / 8.70mm x 23.80mm (exact match required)

The substitute part 45J2R0E meets all electrical and mechanical parameters. Variations in packaging format (Bulk vs. standard), RoHS compliance status, and operating temperature range do not affect functional equivalence for circuit-level substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J2R0 and 45J2R0E are functionally equivalent at the circuit level. Selection between these parts should be based on the following criteria:

Select 45J2R0 when:

• Standard packaging format is required for your procurement workflow
• RoHS non-compliant components are acceptable for your application

Select 45J2R0E when:

• RoHS compliance is mandated by design requirements or regulatory standards
• Bulk packaging format aligns with your assembly process
• Operating temperature range specification (-55°C ~ 275°C) is required for documentation

Both parts are active products with confirmed inventory availability. The choice between them does not affect electrical performance, thermal characteristics, or mechanical fit in axial through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can 45J2R0E be used as a direct replacement for 45J2R0 in existing designs?

A: Yes. The 45J2R0E is a direct functional equivalent. All critical electrical parameters (resistance, tolerance, power rating, temperature coefficient) and mechanical dimensions are identical. The part can be substituted without circuit redesign or PCB layout modification.

Q: What is the difference between the standard and bulk packaging formats?

A: Packaging format refers to the quantity and presentation method for component delivery. The 45J2R0 uses standard packaging, while the 45J2R0E uses bulk packaging. This affects procurement and handling but does not impact component performance or compatibility.

Q: Does RoHS compliance affect component performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical or thermal performance. Both the RoHS non-compliant 45J2R0 and RoHS compliant 45J2R0E deliver identical circuit performance.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm). They are mechanically interchangeable in axial through-hole applications without PCB modification.

Q: Why does 45J2R0E specify an operating temperature range while 45J2R0 does not?

A: The operating temperature range (-55°C ~ 275°C) provided for 45J2R0E represents the qualified operating limits for that specific part variant. Both parts use identical wirewound composition and temperature coefficient (±50ppm/°C), ensuring equivalent thermal stability across standard industrial temperature ranges.

Q: Can I mix 45J2R0 and 45J2R0E components in the same production batch?

A: Yes. Since both parts are electrically and mechanically equivalent, they can be used interchangeably within the same assembly. However, if RoHS compliance documentation is required for the entire product, all resistors should be sourced from the RoHS compliant variant (45J2R0E).