Riedon S4-0R2J1 Equivalent & Substitute Parts

Part Overview

The Riedon S4-0R2J1 is a 200 mOhms ±5% 2W wirewound chip resistor in 4525 J-Lead package configuration. This current sense resistor is designed for applications requiring precision measurement of electrical current through low-resistance paths. The component features flame-proof and moisture-resistant construction with pulse-withstanding capability, making it suitable for demanding industrial and automotive environments. As an active product with robust inventory availability, the S4-0R2J1 serves as a primary selection for new designs and existing applications requiring current sensing functionality.

Substiute Parts

S4-0R2J1

RiedonIn Stock: 1113S4-0R2J1 Datasheet

Current PartRFQ

S4-0R2F2

RiedonIn Stock: 4986S4-0R2F2 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Riedon S4-0R2J1 is determined by the following critical parameters that must remain constant across equivalent parts:

• Resistance value: 200 mOhms (exact match required)
• Power rating: 2W (exact match required)
• Package / Case: 4525 J-Lead (exact match required)
• Operating temperature range: -55°C ~ 275°C (exact match required)
• Physical dimensions: 0.449" L x 0.252" W, 0.197" max height (exact match required)
• Composition: Wirewound (exact match required)
• Features: Current Sense, Flame Proof, Moisture Resistant, Pulse Withstanding, Safety (exact match required)

The tolerance specification (±5% vs ±1%) represents the primary differentiator among qualified substitutes. Tighter tolerance variants maintain all other electrical and mechanical characteristics while providing improved measurement accuracy for current sensing applications.

Parameter Comparison

Engineering Selection Recommendations

Both the S4-0R2J1 and S4-0R2F2 are active products manufactured by Riedon with full ROHS3 compliance and REACH affected status. Selection between these parts depends on tolerance requirements for current measurement accuracy. The S4-0R2J1 with ±5% tolerance is suitable for applications where measurement uncertainty within this range is acceptable. The S4-0R2F2 with ±1% tolerance provides tighter resistance control for applications requiring higher measurement precision. Both parts maintain identical electrical performance characteristics, thermal ratings, and mechanical compatibility within the 4525 J-Lead package format.

Frequently Asked Questions (FAQ)

Q: Can the S4-0R2F2 directly replace the S4-0R2J1 in existing designs?

A: Yes. The S4-0R2F2 is a direct mechanical and electrical substitute. It occupies the same footprint, operates across the same temperature range, and maintains identical power handling characteristics. The primary difference is improved tolerance specification (±1% vs ±5%), which provides better measurement accuracy without requiring circuit modifications.

Q: What is the significance of tolerance in current sense resistor selection?

A: Tolerance defines the maximum deviation of actual resistance from the nominal 200 mOhms value. The ±5% tolerance of the S4-0R2J1 allows resistance between 190 mOhms and 210 mOhms. The ±1% tolerance of the S4-0R2F2 constrains resistance between 198 mOhms and 202 mOhms. Tighter tolerance reduces measurement error in current sensing circuits where voltage drop across the resistor is converted to a current signal.

Q: Are there any packaging or thermal considerations when substituting these parts?

A: No. Both parts use identical 4525 J-Lead packaging with matching physical dimensions and thermal characteristics. They operate across the same temperature range (-55°C ~ 275°C) and share identical moisture sensitivity classification (MSL 1). No layout or thermal management modifications are required.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the S4-0R2J1 and S4-0R2F2 are ROHS3 compliant and REACH affected. They carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8533.21.0080) and moisture sensitivity ratings.

Q: Which part should be selected for new designs?

A: Selection depends on measurement accuracy requirements. For applications where ±5% tolerance is acceptable, the S4-0R2J1 is appropriate. For designs requiring tighter current measurement accuracy, the S4-0R2F2 with ±1% tolerance is the preferred choice. Both are active products with adequate inventory support.