20ETF04STRL Equivalent & Substitute Parts

Part Overview

The 20ETF04STRL is a general-purpose fast recovery rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 400 V DC reverse voltage and 20 A average rectified current in a TO-263AB (D2PAK) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements. Suitable alternatives maintain the same electrical performance envelope or provide enhanced specifications within compatible mechanical packages.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	20 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 20 A
Reverse Recovery Time (trr)	160 ns
Current - Reverse Leakage @ Vr	100 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-40°C ~ 150°C

Substitute Part Grouping Explanation

Substitution eligibility for the 20ETF04STRL is determined by the following critical parameters: voltage rating (minimum 400 V DC reverse), current rating (minimum 20 A average rectified), fast recovery speed classification, surface mount technology, and compatible D2PAK package footprint. Parts meeting these baseline requirements are classified as direct equivalents or functional upgrades.

Direct Parametric Equivalents maintain identical electrical specifications and are interchangeable without circuit modification:

Voltage - DC Reverse (Vr): 400 V minimum
Current - Average Rectified (Io): 20 A minimum
Package: TO-263AB (D2PAK)
Speed: Fast Recovery classification

Functional Upgrades exceed the baseline specifications in current rating or reverse recovery performance while maintaining voltage compatibility and package compatibility:

Voltage - DC Reverse (Vr): 400 V or higher
Current - Average Rectified (Io): Greater than 20 A
Package: TO-263AB (D2PAK)
Speed: Fast Recovery classification

Parameter Comparison

Parameter	20ETF04STRL (Main)	VS-20ETF04S-M3	RFUH20NS3STL	STTH30R04G	STTH30R04G-TR
Manufacturer	Vishay	Vishay	Rohm	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	350 V	400 V	400 V
Current - Average Rectified (Io)	20 A	20 A	20 A	30 A	30 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 20 A	1.3 V @ 20 A	1.5 V @ 20 A	1.45 V @ 30 A	1.45 V @ 30 A
Reverse Recovery Time (trr)	160 ns	160 ns	25 ns	100 ns	100 ns
Current - Reverse Leakage @ Vr	100 µA @ 400 V	100 µA @ 400 V	10 µA @ 350 V	15 µA @ 400 V	15 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Operating Temperature - Junction	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 175°C	-40°C ~ 175°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

VS-20ETF04S-M3 is the direct parametric equivalent to the 20ETF04STRL. This Vishay part maintains identical electrical specifications including 400 V reverse voltage, 20 A current rating, 1.3 V forward voltage, and 160 ns reverse recovery time. The part is currently in active production status with ROHS3 compliance, addressing the obsolescence of the original part while preserving all electrical performance characteristics. Packaging is supplied in tube format.

STTH30R04G and STTH30R04G-TR are functional upgrades manufactured by STMicroelectronics. Both parts provide enhanced current capacity at 30 A while maintaining 400 V reverse voltage compatibility. Reverse recovery time is improved to 100 ns compared to the original 160 ns specification. Operating temperature range extends to 175°C. These parts are suitable for applications requiring higher current margins or improved switching performance. STTH30R04G is supplied in tube packaging, while STTH30R04G-TR is supplied in cut tape and Digi-Reel format.

RFUH20NS3STL is a Rohm Semiconductor alternative with equivalent 20 A current rating and fast recovery characteristics. This part features significantly improved reverse recovery time at 25 ns and reduced reverse leakage current at 10 µA. The reverse voltage rating is 350 V, which is lower than the original 400 V specification. This part is suitable for applications where the 350 V rating is sufficient and where improved switching performance is beneficial. Packaging is supplied in tape and reel format.

All substitute parts maintain surface mount technology and D2PAK package compatibility with the original 20ETF04STRL. All active alternatives carry ROHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can VS-20ETF04S-M3 be used as a direct replacement for 20ETF04STRL?

A: Yes. VS-20ETF04S-M3 is a direct parametric equivalent with identical voltage rating (400 V), current rating (20 A), forward voltage (1.3 V @ 20 A), and reverse recovery time (160 ns). Both parts use the same TO-263AB (D2PAK) package. The primary difference is product status: VS-20ETF04S-M3 is in active production with ROHS3 compliance, while 20ETF04STRL is obsolete.

Q: What are the differences between STTH30R04G and STTH30R04G-TR?

A: STTH30R04G and STTH30R04G-TR are electrically identical parts with the same specifications. The difference is packaging format: STTH30R04G is supplied in tube packaging, while STTH30R04G-TR is supplied in cut tape and Digi-Reel format. Both maintain the same D2PAK footprint and electrical performance.

Q: Can STTH30R04G be used in place of 20ETF04STRL?

A: STTH30R04G is a functional upgrade suitable for applications where higher current capacity is beneficial. It provides 30 A current rating versus the original 20 A, maintains 400 V reverse voltage compatibility, and improves reverse recovery time to 100 ns. The D2PAK package footprint is identical. Applications operating at or near the original 20 A specification will function correctly with this higher-rated part.

Q: Why is RFUH20NS3STL rated at 350 V instead of 400 V?

A: RFUH20NS3STL is a Rohm Semiconductor design with a 350 V reverse voltage rating. This part is suitable for applications where the circuit voltage does not exceed 350 V. The part offers significant advantages in reverse recovery time (25 ns versus 160 ns) and reverse leakage current (10 µA versus 100 µA), making it beneficial for switching performance in compatible voltage applications.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (VS-20ETF04S-M3, RFUH20NS3STL, STTH30R04G, and STTH30R04G-TR) carry ROHS3 compliance certification. The original 20ETF04STRL is RoHS non-compliant. This compliance difference is significant for applications subject to RoHS regulatory requirements.

Q: What is the temperature operating range difference between the main part and substitutes?

A: The original 20ETF04STRL and VS-20ETF04S-M3 both operate from -40°C to 150°C junction temperature. RFUH20NS3STL operates to 150°C maximum. STTH30R04G and STTH30R04G-TR extend the upper operating temperature to 175°C, providing additional thermal margin in high-temperature applications.

Q: Do all parts use the same D2PAK package?

A: Yes. All parts listed use the TO-263-3 D2PAK (2 Leads + Tab) package with TO-263AB supplier device package designation. The footprint and mechanical compatibility are identical across all parts, allowing direct PCB substitution without layout modification.

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