FR6J-TP Equivalent & Substitute Parts

Part Overview

The FR6J-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600V DC reverse voltage and 6A average rectified current in a surface mount DO-214AB (HSMC) package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility within the 600V voltage class while accommodating the current rating and thermal operating range of the original specification.

Key Parameters

Parameter	FR6J-TP Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 6	V @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	10 @ 600	µA @ V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the FR6J-TP is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 600V to ensure equivalent blocking capability.

Current Rating: The FR6J-TP is rated for 6A average rectified current. Substitute parts rated at 6A or higher current capacity are direct replacements. Parts rated below 6A (3A, 2A, 5A) are downgrades and operate within reduced current margins.

Package Type: The DO-214AB (SMC) surface mount package is standard across all listed alternatives, ensuring mechanical and thermal interface compatibility.

Speed Classification: The FR6J-TP employs fast recovery technology (≤500ns). Substitute parts with fast recovery characteristics maintain switching performance; parts with standard recovery (>500ns) represent a performance trade-off.

Reverse Recovery Time (trr): The FR6J-TP specifies 250ns. Faster recovery times (35ns to 85ns) improve switching efficiency; slower times (1.5µs) reduce switching performance.

Operating Temperature Range: The FR6J-TP operates from -55°C to 150°C. Substitutes with equal or wider temperature ranges ensure thermal compatibility.

Compliance: All listed parts maintain ROHS3 compliance and MSL 1 rating, matching the original specification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	Speed	trr [ns]	Ir @ Vr [µA @ V]	Tj Range [°C]	Package	Status
FR6J-TP	Micro Commercial Co	600	6	1.3 @ 6	Fast Recovery ≤500ns	250	10 @ 600	-55 to 150	DO-214AB (HSMC)	Obsolete
S5JC-13-F	Diodes Incorporated	600	5	1.15 @ 5	Standard Recovery >500ns	—	10 @ 600	-65 to 150	DO-214AB (SMC)	Active
CURC305-G	Comchip Technology	600	3	1.7 @ 3	Fast Recovery ≤500ns	75	5 @ 600	-40 to 150	DO-214AB (SMC)	Active
ES3J	Good-Ark Semiconductor	600	3	1.7 @ 3	Fast Recovery ≤500ns	35	10 @ 600	-55 to 150	DO-214AB (SMC)	Active
MURS360T3G	onsemi	600	3	1.25 @ 3	Fast Recovery ≤500ns	75	10 @ 600	-65 to 175	DO-214AB (SMC)	Active
RS3J-13-F	Diodes Incorporated	600	3	1.3 @ 3	Fast Recovery ≤500ns	250	5 @ 600	-65 to 150	DO-214AB (SMC)	Active
S3J	Diotec Semiconductor	600	3	1.15 @ 3	Standard Recovery >500ns	1500	5 @ 600	-50 to 150	DO-214AB (SMC)	Active
S3J-13-F	Diodes Incorporated	600	3	1.15 @ 3	Standard Recovery >500ns	—	10 @ 600	-65 to 150	DO-214AB (SMC)	Active
STTH2R06S	STMicroelectronics	600	2	1.7 @ 2	Fast Recovery ≤500ns	50	2 @ 600	-40 to 175	DO-214AB (SMC)	Active
STTH3L06S	STMicroelectronics	600	3	1.3 @ 3	Fast Recovery ≤500ns	85	3 @ 600	-40 to 175	DO-214AB (SMC)	Active
STTH3R06S	STMicroelectronics	600	3	1.7 @ 3	Fast Recovery ≤500ns	35	3 @ 600	-40 to 175	DO-214AB (SMC)	Active

Engineering Selection Recommendations

Current Capacity Considerations:

The FR6J-TP operates at 6A average rectified current. Among the listed substitutes, only S5JC-13-F approaches this rating at 5A. All other alternatives are rated at 3A or below, representing significant current derating. Selection of lower-current parts requires circuit analysis to confirm that peak and average current demands do not exceed the substitute part's rating.

Voltage Compatibility:

All substitute parts maintain the 600V DC reverse voltage rating, ensuring equivalent blocking capability across the full voltage class.

Active Product Status:

All substitute parts listed carry Active product status, ensuring ongoing availability and manufacturing support. The FR6J-TP is classified as Obsolete, making substitution necessary for new designs and long-term procurement.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original specification. REACH status is consistent across all alternatives.

Thermal Operating Range:

The FR6J-TP specifies -55°C to 150°C junction temperature operation. Substitutes from STMicroelectronics (STTH series) and onsemi (MURS360T3G) extend the upper temperature limit to 175°C, providing enhanced thermal margin. Diodes Incorporated parts (RS3J-13-F, S3J-13-F) and Good-Ark ES3J maintain compatibility within the original range or extend to -65°C minimum.

Recovery Speed Trade-offs:

Fast recovery diodes (CURC305-G, ES3J, MURS360T3G, RS3J-13-F, STTH series) maintain the FR6J-TP's switching performance characteristics. Standard recovery alternatives (S3J, S3J-13-F, S5JC-13-F) exhibit longer reverse recovery times (>500ns to 1.5µs), reducing switching efficiency in high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 3A-rated diode as a direct replacement for the 6A FR6J-TP?

A: No. The FR6J-TP is rated for 6A average rectified current. Substituting a 3A-rated part creates a 50% current derating margin. This substitution is only valid if circuit analysis confirms that actual average and peak current demands remain below 3A. Exceeding the substitute part's current rating causes thermal stress and premature failure.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes (trr ≤500ns) switch off more quickly, reducing switching losses and enabling operation at higher frequencies. Standard recovery diodes (trr >500ns) exhibit longer reverse recovery times, increasing switching losses. The FR6J-TP employs fast recovery technology. Substitutes with standard recovery (S3J, S3J-13-F, S5JC-13-F) are suitable only for low-frequency applications where switching speed is not critical.

Q: Are all substitute parts compatible with the DO-214AB package footprint?

A: Yes. All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and thermal interface compatibility with the original FR6J-TP footprint. The HSMC variant designation on the FR6J-TP refers to the same physical package.

Q: Which substitute part most closely matches the FR6J-TP electrical characteristics?

A: RS3J-13-F from Diodes Incorporated provides the closest electrical match, with identical forward voltage (1.3V @ 3A) and reverse recovery time (250ns) specifications. However, RS3J-13-F is rated at 3A, requiring current derating analysis. S5JC-13-F provides the highest current rating (5A) among active substitutes, though it employs standard recovery technology.

Q: Does the operating temperature range affect substitution decisions?

A: Yes. The FR6J-TP operates from -55°C to 150°C. Substitutes with wider temperature ranges (STMicroelectronics STTH series: -40°C to 175°C; onsemi MURS360T3G: -65°C to 175°C) provide enhanced thermal margin. Parts with narrower ranges (CURC305-G: -40°C to 150°C) may be unsuitable for applications requiring full -55°C minimum operation.

Q: What is the significance of reverse leakage current specifications?

A: Reverse leakage current (Ir) indicates the small current flowing through the diode when reverse-biased. The FR6J-TP specifies 10µA @ 600V. Substitutes with lower leakage (STTH2R06S: 2µA; STTH3L06S: 3µA; RS3J-13-F: 5µA) reduce standby power consumption. Higher leakage (all others: 10µA) matches the original specification. Leakage differences are typically negligible in most applications.

Q: Can I substitute the FR6J-TP in a high-frequency switching application?

A: Only with fast recovery substitutes. Fast recovery diodes (CURC305-G, ES3J, MURS360T3G, RS3J-13-F, STTH series) maintain the FR6J-TP's switching performance. Standard recovery alternatives (S3J, S3J-13-F, S5JC-13-F) are unsuitable for high-frequency operation due to longer reverse recovery times, which increase switching losses and electromagnetic interference.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in surface mount DO-214AB (SMC) packages. Packaging formats vary: Cut Tape (CT) & Digi-Reel®, or Tape & Reel (TR). These are logistics variants of the same physical package and do not affect electrical or mechanical compatibility. Selection depends on procurement and assembly requirements.

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