Riedon S3-0R3J8 Equivalent & Substitute Parts

Part Overview

The Riedon S3-0R3J8 is a 300 mOhms ±5% 3W wirewound chip resistor in 6327 J-Lead package configuration. This current sense resistor is designed for precision measurement applications requiring low resistance values with high power dissipation capability. The component features flame proof, moisture resistant, and pulse withstanding characteristics, making it suitable for demanding industrial and automotive environments. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating, substitute parts are identified to provide design flexibility for procurement, inventory optimization, or performance enhancement scenarios.

Substiute Parts

S3-0R3J8

RiedonIn Stock: 1115S3-0R3J8 Datasheet

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S3-0R3F1

RiedonIn Stock: 956S3-0R3F1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S3-0R3J8 are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion is the maintenance of identical resistance value (300 mOhms), power rating (3W), package configuration (6327 J-Lead), and physical dimensions. The S3-0R3F1 qualifies as a direct substitute because it maintains all critical parameters while offering an upgrade in tolerance specification.

Key parameters determining substitutability:

• Resistance value: 300 mOhms (exact match required)
• Power rating: 3W (exact match required)
• Package / Case: 6327 J-Lead (exact match required)
• Physical dimensions: 0.626" L x 0.272" W, 0.268" height (exact match required)
• Operating temperature range: -55°C ~ 275°C (exact match required)
• Composition: Wirewound (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Both the S3-0R3J8 and S3-0R3F1 are active products manufactured by Riedon with identical ROHS3 compliance and REACH affected status. The S3-0R3F1 represents an upgrade path, offering tighter tolerance specification (±1% versus ±5%) while maintaining all other electrical and mechanical characteristics. Selection between these parts depends on circuit tolerance requirements. For applications requiring standard tolerance specifications, the S3-0R3J8 is appropriate. For applications demanding higher precision in resistance value, the S3-0R3F1 is the suitable alternative. Both parts maintain identical thermal performance, package footprint, and environmental protection features across the full operating temperature range of -55°C to 275°C.

Frequently Asked Questions (FAQ)

Q: Can the S3-0R3F1 be used as a direct replacement for the S3-0R3J8 in existing designs?

A: Yes. The S3-0R3F1 maintains identical resistance value, power rating, package configuration, and physical dimensions. The primary difference is tolerance specification, where S3-0R3F1 provides ±1% tolerance compared to ±5% in the S3-0R3J8. This represents an upgrade in precision without affecting mechanical or thermal compatibility.

Q: What are the critical parameters that must match for substitution?

A: Resistance value (300 mOhms), power rating (3W), package type (6327 J-Lead), physical dimensions (0.626" L x 0.272" W x 0.268" height), and operating temperature range (-55°C ~ 275°C) must remain identical. All substitute parts listed maintain these specifications.

Q: Are there any compliance or certification differences between the main part and substitute?

A: No. Both the S3-0R3J8 and S3-0R3F1 carry identical ROHS3 compliance, REACH affected status, and moisture sensitivity level (MSL 1 - Unlimited). Regulatory and environmental certifications are equivalent across both parts.

Q: What is the significance of the tolerance difference between these parts?

A: Tolerance specification defines the acceptable deviation range from the nominal 300 mOhms resistance value. The S3-0R3J8 allows ±5% deviation (285-315 mOhms), while the S3-0R3F1 allows ±1% deviation (297-303 mOhms). Selection depends on circuit measurement accuracy requirements.

Q: Are the thermal and environmental characteristics identical?

A: Yes. Both parts operate across the identical temperature range (-55°C ~ 275°C) and share identical feature sets: current sense capability, flame proof construction, moisture resistance, pulse withstanding capability, and safety certification. Environmental protection and thermal performance are equivalent.