R5J250 Equivalent & Substitute Parts

Part Overview

The R5J250 is a 250 Ohms ±5% 5W through-hole wirewound resistor manufactured by Ohmite, part of the PC-58 series. This component features flame retardant coating and safety construction, designed for axial lead configuration. The part is currently active in production with 627 units in stock. Finding equivalent or substitute parts may be necessary due to supply constraints, packaging preferences, or specific application requirements where alternative lead configurations are acceptable.

Substiute Parts

R5J250

OhmiteIn Stock: 673R5J250 Datasheet

Current PartRFQ

R5J250E

OhmiteIn Stock: 733R5J250E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the R5J250 is based on maintaining electrical equivalence across the following critical parameters:

• Resistance value: 250 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Temperature coefficient: ±260ppm/°C (exact match required)
• Safety features: Flame retardant coating and safety construction (exact match required)
• Manufacturer: Ohmite PC-58 series (exact match required)

The R5J250E qualifies as a parametric equivalent because it maintains all electrical specifications and safety features. The primary difference is the lead configuration: R5J250 uses axial leads while R5J250E uses radial leads. This distinction affects PCB layout and mounting orientation but does not alter electrical performance or thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

Selection between R5J250 and R5J250E depends on PCB layout requirements and regulatory compliance needs:

The R5J250 (axial configuration) is suitable for applications where axial lead mounting is specified in the design or where existing PCB layouts accommodate axial component placement.

The R5J250E (radial configuration) is the preferred choice when radial lead mounting is required by PCB design constraints. Additionally, R5J250E offers ROHS3 compliance, making it the appropriate selection for applications subject to RoHS3 regulatory requirements. Both parts maintain identical electrical performance and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can R5J250E replace R5J250 in any application?

A: R5J250E is electrically equivalent to R5J250 in all specifications. However, substitution requires PCB layout compatibility with radial lead configuration. Axial-to-radial conversion is not a direct board-level swap without design modification.

Q: What is the primary difference between these parts?

A: The R5J250 features axial leads (both terminals on opposite ends), while R5J250E features radial leads (both terminals on the same end). Electrical performance, power rating, resistance value, and tolerance are identical.

Q: Does lead configuration affect electrical performance?

A: No. Lead configuration affects only physical mounting and PCB layout. Electrical characteristics, including resistance, tolerance, temperature coefficient, and power dissipation, remain unchanged between axial and radial versions.

Q: Is RoHS compliance a factor in substitution?

A: RoHS compliance is a regulatory consideration, not an electrical one. R5J250E is ROHS3 compliant while R5J250 is not. Applications subject to RoHS3 requirements must use R5J250E.

Q: Are both parts from the same manufacturer and series?

A: Yes. Both R5J250 and R5J250E are manufactured by Ohmite and belong to the PC-58 series, ensuring consistent quality and performance standards.

Q: What packaging options are available?

A: R5J250 is supplied in Box packaging, while R5J250E is supplied in Bulk packaging. Packaging choice may affect procurement quantities and handling procedures but does not impact component performance.