FESF8JTHE3_A/P Equivalent & Substitute Parts

Part Overview

The FESF8JTHE3_A/P is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates at 600 V reverse voltage with an 8 A average rectified current rating and features fast recovery characteristics with a 50 ns reverse recovery time. The device is packaged in an ITO-220AC configuration with an isolated tab and is qualified to AEC-Q101 automotive standards. The part maintains active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 600 V, 8 A general-purpose rectification in through-hole configurations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.5 @ 8	V @ A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10 @ 600	µA @ V
Mounting Type	Through Hole	—
Package / Case	TO-220-2 Full Pack, Isolated Tab	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the FESF8JTHE3_A/P are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following key parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 8 A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): Must be ≤ 500 ns
Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 600 V

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package / Case: TO-220 family configurations
Operating Temperature - Junction: Must support -55°C to 150°C range or equivalent

Compliance Criteria:

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
Product Status: Active or equivalent

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (equal or higher current ratings with compatible electrical characteristics).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
FESF8JTHE3_A/P	Vishay	600	8	1.5 @ 8A	50	10 @ 600V	ITO-220AC	-55 to 150	Active
FESF8JT-E3/45	Vishay	600	8	1.5 @ 8A	50	10 @ 600V	ITO-220AC	-55 to 150	Active
FFPF10UA60ST	onsemi	600	10	2.3 @ 10A	120	100 @ 600V	TO-220F-2L	-65 to 150	Obsolete
RFNL10TJ6SGC9	Rohm	600	10	1.3 @ 10A	150	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFNL15TJ6SGC9	Rohm	600	15	1.3 @ 15A	160	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFNL20TJ6SGC9	Rohm	600	20	1.3 @ 20A	180	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFNL5TJ6SGC9	Rohm	600	5	1.3 @ 5A	130	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFV12TG6SGC9	Rohm	600	12	2.8 @ 12A	45	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFV12TJ6SGC9	Rohm	600	12	2.8 @ 12A	45	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFV15TG6SGC9	Rohm	600	15	2.8 @ 15A	50	10 @ 600V	TO-220ACFP	-40 to 150	Active
RFV15TJ6SGC9	Rohm	600	15	2.8 @ 15A	50	10 @ 600V	TO-220ACFP	-40 to 150	Active

Engineering Selection Recommendations

Parametric Equivalent:

FESF8JT-E3/45 is a direct parametric equivalent to FESF8JTHE3_A/P, manufactured by Vishay General Semiconductor - Diodes Division. Both parts share identical electrical specifications: 600 V reverse voltage, 8 A average rectified current, 1.5 V forward voltage at 8 A, 50 ns reverse recovery time, and 10 µA reverse leakage current at 600 V. Both are packaged in ITO-220AC configurations with isolated tabs and operate across the -55°C to 150°C junction temperature range. Both maintain active product status and ROHS3 compliance. This part is suitable for direct replacement without circuit modification.

Manufacturer-Recommended Alternatives:

Rohm Semiconductor offers a series of 600 V general-purpose rectifier diodes in TO-220ACFP packaging that provide equal or higher current ratings while maintaining 600 V reverse voltage capability and fast recovery characteristics. These parts are active products with ROHS3 compliance and REACH unaffected status.

RFNL10TJ6SGC9 (10 A) and RFNL5TJ6SGC9 (5 A) provide current ratings bracketing the 8 A specification. RFNL10TJ6SGC9 offers 25% higher current capacity with 1.3 V forward voltage at 10 A and 150 ns reverse recovery time. RFNL5TJ6SGC9 provides a lower-current alternative with 1.3 V forward voltage at 5 A and 130 ns reverse recovery time.

RFNL15TJ6SGC9 and RFNL20TJ6SGC9 provide higher current ratings (15 A and 20 A respectively) for applications requiring increased current capacity while maintaining 600 V reverse voltage and fast recovery operation.

RFV12TJ6SGC9 and RFV15TJ6SGC9 offer 12 A and 15 A current ratings with 45 ns and 50 ns reverse recovery times respectively, providing faster switching characteristics than the base RFNL series.

FFPF10UA60ST (onsemi) is listed as manufacturer-recommended but carries obsolete product status. This part provides 10 A current rating at 600 V but exhibits higher forward voltage (2.3 V @ 10 A), higher reverse recovery time (120 ns), and higher reverse leakage current (100 µA @ 600 V) compared to the primary part. Use of this part is not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can FESF8JT-E3/45 be used as a direct replacement for FESF8JTHE3_A/P?

A: Yes. FESF8JT-E3/45 is a parametric equivalent with identical electrical and mechanical specifications. Both parts are manufactured by Vishay, operate at 600 V and 8 A, feature 50 ns reverse recovery time, and are packaged in ITO-220AC configurations. Direct substitution is supported without circuit modification.

Q: What is the difference between ITO-220AC and TO-220ACFP packaging?

A: Both are TO-220 family through-hole packages with isolated tabs. ITO-220AC is the Vishay designation, while TO-220ACFP is the Rohm designation. Both support identical PCB footprints and mounting procedures. The packages are mechanically and electrically compatible for through-hole applications.

Q: Can I use RFNL10TJ6SGC9 (10 A) in place of FESF8JTHE3_A/P (8 A)?

A: RFNL10TJ6SGC9 meets the 600 V reverse voltage requirement and exceeds the 8 A current requirement with a 10 A rating. However, it exhibits different electrical characteristics: 1.3 V forward voltage at 10 A (versus 1.5 V at 8 A for the primary part) and 150 ns reverse recovery time (versus 50 ns). These differences affect power dissipation and switching performance. Substitution is permissible only if circuit design accommodates these parameter variations.

Q: Why is FFPF10UA60ST listed as manufacturer-recommended if it is obsolete?

A: FFPF10UA60ST is included in the substitute list based on the provided input data. However, its obsolete product status indicates it is no longer in active production. The part exhibits higher forward voltage drop, longer reverse recovery time, and higher reverse leakage current than the primary part. New designs should not incorporate this part; existing designs using this part should transition to active alternatives such as RFNL10TJ6SGC9 or RFV12TJ6SGC9.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Voltage - DC Reverse (Vr) rating of 600 V or higher, (2) Current - Average Rectified (Io) rating of 8 A or higher, (3) Fast Recovery speed classification (≤ 500 ns reverse recovery time), (4) Reverse leakage current not exceeding 10 µA @ 600 V, and (5) Through-hole mounting in TO-220 family packaging. All substitute parts listed meet these criteria.

Q: Are all substitute parts ROHS3 compliant and AEC-Q101 qualified?

A: All substitute parts listed are ROHS3 compliant and REACH unaffected. However, only FESF8JTHE3_A/P and FESF8JT-E3/45 carry explicit AEC-Q101 automotive qualification. Rohm parts (RFNL and RFV series) and onsemi FFPF10UA60ST do not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 qualification, use FESF8JT-E3/45 as the substitute.

Q: What is the operating temperature range for substitute parts?

A: FESF8JTHE3_A/P and FESF8JT-E3/45 operate across -55°C to 150°C junction temperature. Rohm parts (RFNL and RFV series) specify -40°C to 150°C maximum junction temperature. FFPF10UA60ST operates across -65°C to 150°C. For applications requiring -55°C minimum operation, use Vishay parts (FESF8JTHE3_A/P or FESF8JT-E3/45) or verify that -40°C minimum is acceptable for Rohm alternatives.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) affects power dissipation and voltage drop across the diode during conduction. FESF8JTHE3_A/P exhibits 1.5 V @ 8 A, while Rohm RFNL series parts exhibit 1.3 V @ rated current, and RFV series parts exhibit 2.8 V @ rated current. Lower forward voltage reduces power dissipation and heat generation. Higher forward voltage increases power dissipation. Circuit thermal design and power supply regulation must accommodate these differences.

Q: What does reverse recovery time (trr) indicate?

A: Reverse recovery time is the interval required for a forward-conducting diode to cease conduction after reverse bias is applied. FESF8JTHE3_A/P features 50 ns trr, indicating fast switching. Longer trr values (such as 150 ns for RFNL10TJ6SGC9) result in slower switching transitions and increased switching losses in high-frequency applications. Shorter trr values (such as 45 ns for RFV12TJ6SGC9) reduce switching losses. Application switching frequency determines whether trr differences are significant.

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