NPS2B-75RJ8 Equivalent & Substitute Parts

Part Overview

The NPS2B-75RJ8 is a 75 Ohm ±5% 30W thick film chip resistor manufactured by Riedon in D2PAK (TO-263-3) package configuration. This current sense resistor is designed for high-power applications requiring moisture resistance and operates across -40°C to 155°C. The part is active and in stock, with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this product category.

Substiute Parts

NPS2B-75RJ8

RiedonIn Stock: 924NPS2B-75RJ8 Datasheet

Current PartRFQ

PWR263S-35-75R0F

Bourns Inc.In Stock: 828PWR263S-35-75R0F Datasheet

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PWR263S-35-75R0J

Bourns Inc.In Stock: 949PWR263S-35-75R0J Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NPS2B-75RJ8 is determined by the following critical parameters:

• Resistance Value: Must be 75 Ohms
• Tolerance: ±5% or tighter (±1% acceptable)
• Package: TO-263-3, D2PAK (2 Leads + Tab) mechanical compatibility
• Composition: Thick Film
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature: Must support -40°C ~ 155°C minimum range
• Features: Current Sense capability required
• Regulatory Compliance: ROHS3 Compliant, MSL 1

The substitute parts PWR263S-35-75R0J and PWR263S-35-75R0F meet these criteria with enhanced power ratings (35W vs. 30W) and automotive-grade qualification (AEC-Q200), providing functional equivalence with improved performance margins.

Parameter Comparison

Engineering Selection Recommendations

Both Bourns PWR263S-35 series parts provide functional equivalence to the NPS2B-75RJ8 with the following considerations:

PWR263S-35-75R0J maintains ±5% tolerance matching the original specification while providing 35W power capability and AEC-Q200 automotive qualification. This part is suitable for direct substitution in applications where tolerance and power margin are primary concerns.

PWR263S-35-75R0F offers ±1% tolerance, providing tighter resistance accuracy than the original part. This variant is appropriate for applications requiring enhanced precision while maintaining all other electrical and mechanical compatibility parameters.

Both substitute parts extend the operating temperature range to -55°C, providing improved low-temperature performance. All parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and current sense functionality required for this application category.

Frequently Asked Questions (FAQ)

Q: Can PWR263S-35-75R0J and PWR263S-35-75R0F be used interchangeably with NPS2B-75RJ8?

A: Yes. Both parts share identical resistance values, package configurations, composition, and temperature coefficients. The primary differences are tolerance (±5% vs. ±1%) and power rating (35W vs. 30W), which represent functional improvements or equivalent performance.

Q: What is the significance of the 35W power rating on the substitute parts?

A: The substitute parts are rated for 35W compared to the original 30W specification. This higher power rating provides additional thermal margin in applications operating near the original part's power limit, without affecting electrical compatibility.

Q: Are the D2PAK packages mechanically identical?

A: The packages are mechanically compatible for PCB mounting. Dimensional variations exist (NPS2B-75RJ8: 12.70mm x 10.16mm vs. PWR263S-35: 10.10mm x 10.40mm), but both conform to TO-263-3 D2PAK specifications and are suitable for the same footprint applications.

Q: Does AEC-Q200 qualification affect substitution eligibility?

A: AEC-Q200 is an automotive-grade qualification present on the Bourns parts but not specified for the original NPS2B-75RJ8. This qualification does not prevent substitution; it indicates additional quality and reliability testing performed by the manufacturer.

Q: What is the difference between ±5% and ±1% tolerance?

A: Tolerance defines the acceptable resistance variation from the nominal 75 Ohm value. ±5% allows 71.25–78.75 Ohms; ±1% allows 74.25–75.75 Ohms. Applications requiring tighter resistance accuracy should use PWR263S-35-75R0F.