Ohmite 20J250 10W 250 Ohms Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 20J250 is a 10W wirewound resistor with 250 ohms resistance and ±5% tolerance, designed for through-hole axial applications. This component features flame retardant coating and safety-rated construction, making it suitable for industrial and safety-critical applications. The part is currently active in production with 1088 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when packaging requirements differ.

Substiute Parts

20J250

OhmiteIn Stock: 118420J250 Datasheet

Current PartRFQ

20J250E

OhmiteIn Stock: 104820J250E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 20J250 are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

• Resistance value: 250 Ohms
• Tolerance: ±5%
• Power rating: 10W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±30ppm/°C
• Physical dimensions: 0.394" Dia x 1.858" L
• Termination count: 2

The substitute part 20J250E maintains identical electrical specifications and physical form factor. The primary distinction is packaging format: the main part (20J250) is supplied in box packaging, while the substitute (20J250E) is supplied in bulk packaging. Both parts are from the same manufacturer series and share the same flame retardant coating and safety features.

Parameter Comparison

Engineering Selection Recommendations

Both the 20J250 and 20J250E are active production parts from Ohmite's series 20 wirewound resistor line. Selection between these parts should be based on the following criteria:

20J250 (Box Packaging): Select this part number when box packaging is required for inventory management, component traceability, or procurement specifications. This part is RoHS non-compliant.

20J250E (Bulk Packaging): Select this part number when bulk packaging is acceptable and RoHS compliance is required. This variant meets RoHS standards while maintaining identical electrical and mechanical specifications.

Both parts are electrically and mechanically interchangeable in circuit applications where the specified resistance, tolerance, power rating, and temperature coefficient are required. The choice between them depends on packaging requirements and regulatory compliance needs for the end application.

Frequently Asked Questions (FAQ)

Q: Are the 20J250 and 20J250E electrically identical?

A: Yes. Both parts have identical resistance (250 Ohms), tolerance (±5%), power rating (10W), temperature coefficient (±30ppm/°C), and composition (wirewound). They are electrically interchangeable.

Q: What is the difference between these part numbers?

A: The primary differences are packaging format (box versus bulk) and RoHS compliance status. The 20J250E is RoHS compliant, while the 20J250 is not. Both maintain identical physical dimensions and electrical characteristics.

Q: Can I use 20J250E as a direct replacement for 20J250 in my circuit?

A: Yes, from an electrical and mechanical standpoint. However, verify that RoHS compliance requirements for your application are met. If your design or procurement specification requires non-RoHS parts, the 20J250 is the appropriate choice.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.394" diameter by 1.858" length (10.00mm x 47.20mm) and use the same axial through-hole package configuration.

Q: Which part should I specify for new designs?

A: For new designs, specify 20J250E if RoHS compliance is required by your application or regulatory environment. Both parts are active production items with adequate inventory levels.

Q: Do these parts have the same temperature coefficient?

A: Yes. Both parts have a temperature coefficient of ±30ppm/°C, ensuring consistent performance across the operating temperature range.