Riedon S1-0R3J8 Equivalent & Substitute Parts

Part Overview

The Riedon S1-0R3J8 is a 300 mOhms ±5% wirewound chip resistor rated at 0.5W (1/2W) in a 1913 J-Lead package. This current sense resistor is designed for applications requiring precision low-resistance measurements with flame-proof, moisture-resistant, and pulse-withstanding characteristics. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when electrical and mechanical parameters align within the allowed specifications for this product category.

Substiute Parts

S1-0R3J8

RiedonIn Stock: 779S1-0R3J8 Datasheet

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S1-0R3F1

RiedonIn Stock: 1502S1-0R3F1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S1-0R3J8 are qualified based on the following criteria:

• Identical resistance value: 300 mOhms
• Identical power rating: 0.5W (1/2W)
• Identical package / case: 1913 J-Lead
• Identical physical dimensions: 0.189" L x 0.130" W (4.80mm x 3.30mm)
• Identical operating temperature range: -55°C ~ 275°C
• Identical composition: Wirewound
• Tolerance may vary within acceptable electrical performance parameters
• Identical RoHS and MSL compliance status

The S1-0R3F1 qualifies as a direct substitute with improved tolerance specification (±1% versus ±5%), maintaining all other critical electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the S1-0R3J8 and S1-0R3F1 are Active status components from Riedon with identical ROHS3 compliance and MSL ratings. The S1-0R3F1 offers improved tolerance specification at ±1% compared to the ±5% tolerance of the S1-0R3J8, while maintaining identical electrical ratings, package configuration, and operating temperature range. Selection between these parts depends on circuit tolerance requirements and application-specific accuracy specifications. Both parts maintain full compliance with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the S1-0R3F1 be used as a direct replacement for the S1-0R3J8?

A: Yes. The S1-0R3F1 is electrically and mechanically compatible with the S1-0R3J8. Both parts share identical resistance values, power ratings, package types, physical dimensions, and operating temperature ranges. The primary difference is tolerance specification.

Q: What is the tolerance difference between these parts?

A: The S1-0R3J8 has ±5% tolerance, while the S1-0R3F1 has ±1% tolerance. The tighter tolerance of the S1-0R3F1 provides greater resistance accuracy for precision current sensing applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.189" L x 0.130" W (4.80mm x 3.30mm) with a maximum seated height of 0.126" (3.20mm). They use the same 1913 J-Lead package configuration.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the S1-0R3J8 and S1-0R3F1 are ROHS3 compliant with MSL rating of 1 (Unlimited) and REACH affected status.

Q: What is the operating temperature range for these resistors?

A: Both parts operate across the temperature range of -55°C to 275°C, supporting applications in extreme thermal environments.

Q: Are these parts suitable for current sensing applications?

A: Yes. Both parts are specified as current sense resistors with wirewound composition, flame-proof, moisture-resistant, pulse-withstanding, and safety features designed for low-resistance measurement circuits.