Ohmite 45J250 Equivalent & Substitute Parts

Part Overview

The Ohmite 45J250 is a 250 Ohm, 5% tolerance, 5W through-hole resistor with axial wirewound construction from the Ohmicone® 40 series. This component is currently active in production and maintains 750 pieces in new original stock. The part is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS regulations or customer specifications requiring RoHS certification.

Substiute Parts

45J250

OhmiteIn Stock: 82845J250 Datasheet

Current PartRFQ

45J250E

OhmiteIn Stock: 96245J250E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Ohmite 45J250 is based on strict electrical and mechanical parameter matching within the Ohmicone® 40 series. The substitute part must maintain identical specifications across the following critical parameters:

• Resistance value: 250 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)
• Termination count: 2

The identified substitute, Ohmite 45J250E, meets all electrical and mechanical requirements for direct substitution. The primary distinction between the main part and substitute is packaging format and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the Ohmite 45J250 and 45J250E are active production components from the same manufacturer and series. Selection between these parts is determined by regulatory and compliance requirements:

The 45J250 is suitable for applications where RoHS compliance is not mandated or where legacy component specifications are required.

The 45J250E is the appropriate selection for applications subject to RoHS3 compliance requirements or customer specifications requiring RoHS certification. This substitute maintains identical electrical performance and mechanical compatibility while meeting current environmental compliance standards.

Both parts carry REACH Unaffected status and EAR99 export classification. Inventory availability is adequate for both options.

Frequently Asked Questions (FAQ)

Q: Can the 45J250E directly replace the 45J250 in existing designs?

A: Yes. The 45J250E is electrically and mechanically identical to the 45J250. Both components share the same resistance value, tolerance, power rating, wirewound composition, axial package configuration, temperature coefficient, and physical dimensions. Direct substitution is supported without circuit modification.

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

A: The primary differences are RoHS compliance status and packaging format. The 45J250E is ROHS3 compliant, while the 45J250 is RoHS non-compliant. The 45J250E is supplied in bulk packaging, whereas the 45J250 uses standard packaging. All electrical and mechanical specifications are identical.

Q: Which part should be selected for new designs?

A: For new designs subject to RoHS regulations or customer RoHS requirements, the 45J250E is the appropriate selection. Both parts are active in production with adequate inventory levels.

Q: Are there any performance differences between the 45J250 and 45J250E?

A: No. Both parts maintain identical electrical characteristics, including 250 Ohm resistance, ±5% tolerance, 5W power rating, ±20ppm/°C temperature coefficient, and wirewound construction. Performance in circuit operation is equivalent.

Q: What are the physical dimensions of these resistors?

A: Both the 45J250 and 45J250E measure 0.343 inches in diameter by 0.937 inches in length (8.70mm x 23.80mm). These dimensions are identical and support direct mechanical substitution in PCB layouts and component mounting applications.