S4-68RJ2 Equivalent & Substitute Parts

Part Overview

The S4-68RJ2 is a 68 Ohms ±5% 2W wirewound chip resistor in 4525 J-Lead package manufactured by Riedon. This component is designed for current sense applications with integrated safety features including flame proof, moisture resistant, and pulse withstanding characteristics. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies requiring reliable current sensing in harsh operating environments spanning -55°C to 275°C.

Substitute parts are identified when electrical specifications, mechanical compatibility, and safety certifications remain equivalent or provide enhanced performance within the same package footprint and application context.

Substiute Parts

S4-68RJ2

RiedonIn Stock: 831S4-68RJ2 Datasheet

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S4-68RF1

RiedonIn Stock: 1075S4-68RF1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The S4-68RF1 qualifies as a direct substitute for the S4-68RJ2 based on the following criteria:

Electrical Equivalence: Both parts maintain 68 Ohms resistance and 2W power rating. The S4-68RF1 provides tighter tolerance (±1% versus ±5%), which represents an upgrade in precision without altering the fundamental electrical behavior in current sense applications.

Mechanical Compatibility: Identical package designation (4525 J-Lead), physical dimensions (0.449" L x 0.252" W / 11.40mm x 6.40mm), and seated height (0.197" / 5.00mm) ensure direct board-level compatibility without layout modifications.

Environmental & Safety Specifications: Both parts share identical operating temperature range (-55°C to 275°C), temperature coefficient (±20ppm/°C), and feature set (Current Sense, Flame Proof, Moisture Resistant, Pulse Withstanding, Safety). Moisture Sensitivity Level remains 1 (Unlimited) for both.

Compliance & Status: Both parts are Active status, ROHS3 compliant, REACH affected, and carry identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications.

Parameter Comparison

Engineering Selection Recommendations

Both S4-68RJ2 and S4-68RF1 are Active status components with full ROHS3 compliance and REACH compliance status. Selection between these parts depends on tolerance requirements for the application circuit.

The S4-68RJ2 with ±5% tolerance is suitable for general current sensing applications where standard precision meets circuit performance requirements. The S4-68RF1 with ±1% tolerance provides enhanced precision for applications requiring tighter resistance accuracy. Both parts maintain identical thermal performance, safety certifications, and environmental ratings across the full operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can S4-68RF1 directly replace S4-68RJ2 in existing designs?

A: Yes. The S4-68RF1 is mechanically and electrically compatible with identical package dimensions, power rating, and operating temperature range. The tighter tolerance (±1% versus ±5%) represents an upgrade in precision without requiring circuit modifications.

Q: What is the primary difference between these two parts?

A: The tolerance specification differs. S4-68RJ2 specifies ±5% tolerance while S4-68RF1 specifies ±1% tolerance. All other electrical, mechanical, and environmental parameters are identical.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both parts operate across -55°C to 275°C with identical temperature coefficient of ±20ppm/°C, making them suitable for harsh thermal environments.

Q: Do these parts require special handling or storage?

A: Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both S4-68RJ2 and S4-68RF1 are ROHS3 compliant and REACH affected, meeting current electronic component regulatory standards.