SL44-M3/57T Equivalent & Substitute Parts

Part Overview

The SL44-M3/57T is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 4 A average rectified current in a DO-214AB (SMC) surface mount package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or packaging preferences while maintaining identical functional specifications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	440 mV @ 4 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SL44-M3/57T is determined by strict equivalence across the following critical parameters: Voltage - DC Reverse (Vr) maximum rating of 40 V, Current - Average Rectified (Io) of 4 A, Voltage - Forward (Vf) maximum of 440 mV at 4 A, Fast Recovery speed characteristic (≤ 500ns, > 200mA), Current - Reverse Leakage of 500 µA at 40 V, DO-214AB (SMC) package configuration, Surface Mount mounting type, and Operating Temperature - Junction range of -55°C to 125°C. All substitute parts must maintain identical electrical performance within these parameters and comply with RoHS3 and REACH requirements. Packaging format variations (Tape & Reel versus Cut Tape & Digi-Reel) do not affect functional substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Package	Mounting	Tj (Operating)	Product Status	Packaging Format
SL44-M3/57T	Vishay General Semiconductor - Diodes Division	40 V	4 A	440 mV @ 4 A	Fast Recovery ≤ 500ns, > 200mA	500 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Tape & Reel (TR)
SL44-E3/57T	Vishay General Semiconductor - Diodes Division	40 V	4 A	440 mV @ 4 A	Fast Recovery ≤ 500ns, > 200mA	500 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
SL44-E3/9AT	Vishay General Semiconductor - Diodes Division	40 V	4 A	440 mV @ 4 A	Fast Recovery ≤ 500ns, > 200mA	500 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Tape & Reel (TR)
SL44-M3/9AT	Vishay General Semiconductor - Diodes Division	40 V	4 A	440 mV @ 4 A	Fast Recovery ≤ 500ns, > 200mA	500 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Tape & Reel (TR)
SK44L_R1_00001	Panjit International Inc.	40 V	4 A	440 mV @ 4 A	Fast Recovery ≤ 500ns, > 200mA	200 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Tape & Reel (TR)
B340-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500ns, > 200mA	500 µA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
SK84L-TP	Micro Commercial Co	40 V	8 A	650 mV @ 8 A	Fast Recovery ≤ 500ns, > 200mA	1 mA @ 40 V	DO-214AB, SMC	Surface Mount	-55°C ~ 150°C	Not For New Designs	Tape & Reel (TR)

Engineering Selection Recommendations

Parametric Equivalents (Vishay SL44 Series): The parts SL44-E3/57T, SL44-E3/9AT, and SL44-M3/9AT are direct parametric equivalents to the SL44-M3/57T. All four parts share identical electrical specifications across voltage, current, forward voltage drop, and reverse leakage parameters. These parts differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and are suitable for direct substitution in any application. All maintain Active product status and RoHS3 compliance.

Cross-Manufacturer Parametric Equivalent (Panjit): The SK44L_R1_00001 from Panjit International Inc. meets all critical electrical parameters with one exception: reverse leakage current is specified at 200 µA @ 40 V, which is lower than the 500 µA specification of the SL44-M3/57T. This represents improved performance in the reverse leakage characteristic. The part maintains identical voltage, current, forward voltage, and speed ratings. Active product status and RoHS3 compliance are confirmed.

Manufacturer Recommended Alternatives: The B340-13-F from Diodes Incorporated and SK84L-TP from Micro Commercial Co are listed as manufacturer-recommended alternatives but do not meet full parametric equivalence. The B340-13-F is rated for 3 A average rectified current (versus 4 A) and exhibits 500 mV forward voltage drop at 3 A (versus 440 mV at 4 A). The SK84L-TP is rated for 8 A current capacity with 650 mV forward voltage drop at 8 A and carries a "Not For New Designs" product status designation. These parts are suitable only when application requirements permit reduced current capacity or when higher current capability is required, respectively.

Frequently Asked Questions (FAQ)

Q: Can SL44-E3/57T replace SL44-M3/57T in production?

A: Yes. Both parts are parametric equivalents with identical electrical specifications. The difference is packaging format: SL44-E3/57T is supplied in Cut Tape & Digi-Reel format while SL44-M3/57T is supplied in Tape & Reel format. Electrical performance and mechanical compatibility are identical.

Q: What is the difference between SL44-M3/9AT and SL44-M3/57T?

A: Both parts are electrically identical 40 V, 4 A Schottky diodes in DO-214AB packages. The suffix designation (9AT versus 57T) indicates different tape configurations within the Tape & Reel packaging format. Electrical performance is equivalent.

Q: Is SK44L_R1_00001 from Panjit a suitable substitute?

A: Yes. The SK44L_R1_00001 meets all critical electrical parameters: 40 V reverse voltage, 4 A current rating, 440 mV forward voltage drop, and Fast Recovery speed. The reverse leakage current is 200 µA @ 40 V, which is lower than the 500 µA specification of the SL44-M3/57T, representing improved performance. The part is Active status and RoHS3 compliant.

Q: Why is SK84L-TP listed as a substitute if it has different ratings?

A: SK84L-TP is listed as a manufacturer-recommended alternative, not a direct parametric equivalent. It provides higher current capacity (8 A versus 4 A) and is suitable when application requirements exceed the 4 A rating of the SL44-M3/57T. However, it carries "Not For New Designs" status and exhibits higher forward voltage drop (650 mV @ 8 A). Use only when increased current capacity is required.

Q: Can B340-13-F replace SL44-M3/57T?

A: B340-13-F is not a parametric equivalent. It is rated for 3 A average rectified current (lower than the 4 A rating) and exhibits 500 mV forward voltage drop at 3 A (higher than the 440 mV at 4 A). Use only when application requirements permit reduced current capacity.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant. Compliance status is confirmed for SL44-E3/57T, SL44-E3/9AT, SL44-M3/9AT, SK44L_R1_00001, B340-13-F, and SK84L-TP.

Q: What is the operating temperature range for these diodes?

A: The SL44-M3/57T and all Vishay SL44 series equivalents operate from -55°C to 125°C junction temperature. The Panjit SK44L_R1_00001 operates within the same range. The SK84L-TP extends to -55°C to 150°C. The B340-13-F operates from -55°C to 125°C.

Q: Does packaging format affect electrical performance?

A: No. Packaging format differences (Tape & Reel, Cut Tape & Digi-Reel, or specific tape configurations) do not affect electrical performance or mechanical compatibility in the DO-214AB (SMC) package. Format selection is determined by assembly equipment and supply chain requirements.

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