WW3JTR250 Equivalent & Substitute Parts

Part Overview

The WW3JTR250 is a 250 mOhms ±5% 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring low-resistance, high-power dissipation in a compact axial package with moisture-resistant construction. The part maintains Active product status with 919 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

WW3JTR250

Stackpole Electronics IncIn Stock: 1022WW3JTR250 Datasheet

Current PartRFQ

WW3FTR250

Stackpole Electronics IncIn Stock: 1531WW3FTR250 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the WW3JTR250 is determined by maintaining the following critical parameters:

• Resistance value: 250 mOhms (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.187" Dia x 0.560" L (exact match required)
• Temperature coefficient: ±90ppm/°C (exact match required)
• Operating temperature range: -55°C to 350°C (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

The WW3FTR250 qualifies as a substitute part because it maintains all critical electrical and mechanical parameters. The tolerance specification differs (±1% versus ±5%), which represents an upgrade in precision rather than a deviation from compatibility requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the WW3JTR250 and WW3FTR250 maintain Active product status and full ROHS3 compliance. Selection between these parts is determined by tolerance requirements and packaging format availability. The WW3JTR250 is supplied in Tape & Reel format with ±5% tolerance specification. The WW3FTR250 is supplied in Cut Tape format with ±1% tolerance specification. Applications requiring tighter resistance tolerance specifications will benefit from the WW3FTR250 upgrade. Packaging format selection depends on assembly process requirements and inventory management protocols.

Frequently Asked Questions (FAQ)

Q: Can WW3FTR250 be used as a direct replacement for WW3JTR250?

A: Yes. The WW3FTR250 maintains identical resistance value, power rating, composition, package type, physical dimensions, temperature coefficient, and operating temperature range. The tolerance specification is tighter (±1% versus ±5%), which does not create compatibility issues in applications designed for the WW3JTR250.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous tape wound on a reel, suitable for high-volume automated assembly. Cut Tape packaging supplies components on tape segments, suitable for lower-volume applications or manual assembly processes. Both formats contain identical components.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts share identical temperature coefficient (±90ppm/°C), operating temperature range (-55°C to 350°C), power rating (3W), and resistance value (250 mOhms). Performance differences are limited to tolerance specification only.

Q: What compliance certifications apply to both parts?

A: Both WW3JTR250 and WW3FTR250 are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99. Both parts are suitable for applications requiring regulatory compliance in these categories.

Q: How does tolerance affect component selection?

A: Tolerance defines the acceptable resistance variation from the nominal 250 mOhms value. The WW3JTR250 allows ±5% variation (237.5 to 262.5 mOhms), while WW3FTR250 allows ±1% variation (247.5 to 252.5 mOhms). Applications with strict resistance specifications require the tighter tolerance of WW3FTR250.