S4-680RJ8 Equivalent & Substitute Parts

Part Overview

The S4-680RJ8 is a 680 Ohms ±5% 2W wirewound chip resistor in 4525 J-Lead package manufactured by Riedon. This component is designed for current sense applications and features flame proof, moisture resistant, and pulse withstanding characteristics. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies requiring high reliability and environmental protection.

Substitute parts are identified when electrical and mechanical parameters remain within acceptable tolerances for the application, allowing for component interchangeability while maintaining circuit performance and compliance requirements.

Substiute Parts

S4-680RJ8

RiedonIn Stock: 955S4-680RJ8 Datasheet

Current PartRFQ

S4-680RF1

RiedonIn Stock: 956S4-680RF1 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

The S4-680RF1 qualifies as a substitute for the S4-680RJ8 based on the following criteria:

Matching Parameters:

• Resistance value: 680 Ohms (identical)
• Power rating: 2W (identical)
• Composition: Wirewound (identical)
• Package / Case: 4525 J-Lead (identical)
• Physical dimensions: 0.449" L x 0.252" W, 0.197" height (identical)
• Operating temperature range: -55°C ~ 275°C (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Features: Current Sense, Flame Proof, Moisture Resistant, Pulse Withstanding, Safety (identical)
• RoHS Status: ROHS3 Compliant (identical)
• MSL: 1 (Unlimited) (identical)

Distinguishing Parameter:

• Tolerance: S4-680RF1 provides ±1% tolerance versus ±5% tolerance of S4-680RJ8

The S4-680RF1 represents an upgrade path where tighter tolerance specification is required while maintaining all other electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both S4-680RJ8 and S4-680RF1 maintain Active product status with ROHS3 compliance and REACH affected designation. Selection between these parts depends on tolerance requirements for the specific application.

The S4-680RJ8 with ±5% tolerance is suitable for applications where standard tolerance specifications are acceptable. The S4-680RF1 with ±1% tolerance provides improved accuracy for circuits requiring tighter resistance value control. Both parts share identical mechanical packaging, thermal characteristics, and protective features, ensuring direct substitution capability at the board level.

Frequently Asked Questions (FAQ)

Q: Can S4-680RF1 replace S4-680RJ8 in existing designs?

A: Yes. The S4-680RF1 is mechanically and electrically compatible with the S4-680RJ8. Both parts use the 4525 J-Lead package with identical dimensions and mounting characteristics. The primary difference is tolerance specification, where S4-680RF1 provides tighter tolerance (±1% versus ±5%).

Q: What is the tolerance difference between these parts?

A: The S4-680RJ8 has ±5% tolerance, meaning the actual resistance value can vary between 646 Ohms and 714 Ohms. The S4-680RF1 has ±1% tolerance, with actual resistance between 673 Ohms and 687 Ohms. The ±1% specification provides greater accuracy for precision applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.449" L x 0.252" W (11.40mm x 6.40mm) with a maximum seated height of 0.197" (5.00mm). They are fully compatible for PCB layout and assembly processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both S4-680RJ8 and S4-680RF1 are ROHS3 compliant, REACH affected, and carry MSL 1 (Unlimited) moisture sensitivity rating. They share identical operating temperature range (-55°C ~ 275°C) and temperature coefficient (±20ppm/°C).

Q: Which part should be selected for current sense applications?

A: Both parts are rated for current sense applications with identical flame proof, moisture resistant, and pulse withstanding features. Selection depends on the tolerance accuracy required by the circuit design. Standard tolerance (±5%) is adequate for most current sense applications unless precision measurement is critical.