FR3J Equivalent & Substitute Parts Reference

Part Overview

The FR3J is a general-purpose rectifier diode manufactured by SMC Diode Solutions, rated for 600 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Identifying equivalent and substitute parts ensures design continuity and maintains supply chain reliability for applications requiring 600 V / 3 A rectification performance.

Substiute Parts

FR3J

SMC Diode SolutionsIn Stock: 18279FR3J Datasheet

Current PartRFQ

RS3J

Taiwan Semiconductor CorporationIn Stock: 30289RS3J Datasheet

DirectRFQ

MURS360T3G

onsemiIn Stock: 105192MURS360T3G Datasheet

SimilarRFQ

RS3J-13-F

Diodes IncorporatedIn Stock: 17488RS3J-13-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FR3J are classified based on strict electrical and mechanical parameter matching within the 600 V / 3 A rectifier diode category. All substitute candidates maintain the following core requirements:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Direct Manufacturer Equivalent (RS3J): Identical electrical ratings and package configuration with active product status and improved availability.

Similar Manufacturer Part (MURS360T3G): Meets all core electrical and mechanical requirements with enhanced performance characteristics (lower reverse recovery time, extended temperature range) and highest inventory availability.

Parametric Equivalent (RS3J-13-F): Matches all critical electrical parameters including forward voltage and reverse leakage specifications with active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): RS3J-13-F is the optimal substitute, providing identical electrical performance specifications (1.3 V forward voltage, 250 ns reverse recovery time, 5 µA reverse leakage) with active product status, RoHS3 compliance, and confirmed availability. This part maintains full parameter compatibility with the FR3J across all critical electrical and thermal characteristics.

For Enhanced Performance Applications: MURS360T3G offers superior reverse recovery time (75 ns versus 250 ns) and extended maximum junction temperature rating (-65 to 175 °C versus -65 to 150 °C), with the highest inventory availability (105,100 pieces). This part is suitable for applications requiring faster switching performance or operation at elevated temperatures. Forward voltage is marginally lower (1.25 V versus 1.3 V), resulting in reduced power dissipation.

For Active Supply Chain Continuity: RS3J provides direct manufacturer equivalence with active product status and substantial inventory (30,200 pieces). This part is suitable for applications where forward voltage specification is not critical. Operating temperature range is slightly reduced (-55 to 150 °C minimum versus -65 to 150 °C), which may impact designs requiring full cold-temperature operation.

All substitute parts maintain identical package configuration (DO-214AB, SMC), surface mount compatibility, and regulatory compliance (REACH Unaffected, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can RS3J be used as a direct replacement for FR3J? A: RS3J meets all core electrical requirements (600 V, 3 A, 250 ns recovery time) and package specifications (DO-214AB, SMC). The primary difference is operating temperature range (-55 to 150 °C for RS3J versus -65 to 150 °C for FR3J). RS3J is suitable for applications not requiring operation below -55 °C.

Q: What is the difference between MURS360T3G and RS3J-13-F? A: Both parts meet the 600 V / 3 A electrical requirements and DO-214AB package specification. MURS360T3G features significantly faster reverse recovery time (75 ns versus 250 ns) and extended temperature range (-65 to 175 °C versus -65 to 150 °C). RS3J-13-F provides identical reverse recovery time and reverse leakage characteristics to the FR3J. Selection depends on whether faster switching performance or extended temperature operation is required.

Q: Are all substitute parts RoHS3 compliant? A: RS3J, MURS360T3G, and RS3J-13-F are all RoHS3 compliant. The original FR3J does not specify RoHS status in the provided data.

Q: Do all substitute parts have the same package configuration? A: Yes. All substitute parts (RS3J, MURS360T3G, RS3J-13-F) use the DO-214AB (SMC) surface mount package, ensuring mechanical and thermal compatibility with FR3J PCB layouts.

Q: What is the significance of reverse recovery time differences? A: Reverse recovery time (trr) affects switching speed and electromagnetic interference characteristics. MURS360T3G (75 ns) switches faster than FR3J, RS3J, and RS3J-13-F (250 ns each). Faster recovery reduces switching losses in high-frequency applications but may increase EMI. Selection depends on circuit operating frequency and EMI requirements.

Q: Which substitute part has the best availability? A: MURS360T3G has the highest inventory (105,100 pieces), followed by RS3J (30,200 pieces) and RS3J-13-F (17,400 pieces).

Q: Can MURS360T3G be used in applications requiring -65 °C minimum temperature operation? A: Yes. MURS360T3G operating temperature range is -65 to 175 °C, which covers the full cold-temperature requirement. RS3J minimum operating temperature is -55 °C, which does not meet this requirement.

Q: Are there differences in reverse leakage current between substitute parts? A: Yes. FR3J and RS3J-13-F specify 5 µA reverse leakage at 600 V, while RS3J and MURS360T3G specify 10 µA. This difference may be significant in high-impedance or precision analog circuits where leakage current affects performance.