SL44-M3/9AT Equivalent & Substitute Parts

Part Overview

The SL44-M3/9AT 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 fully RoHS3 compliant with REACH unaffected designation.

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the Schottky diode rectifier category. Alternative sources and packaging configurations are available to support supply chain flexibility and design requirements.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution relationships for the SL44-M3/9AT are established based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 4 A (or higher)
Voltage - Forward (Vf) (Max) @ If: 440 mV @ 4 A (or lower)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 125°C (minimum)
Technology: Schottky

Parametric Equivalent Parts share identical electrical specifications and package configuration, differing only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) or manufacturer source.

Manufacturer Recommended Parts meet the core voltage and current requirements but may exhibit variations in forward voltage, reverse leakage current, or capacitance characteristics. These parts are suitable for applications where the primary performance envelope is maintained within acceptable design margins.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Packaging Format	Product Status
SL44-M3/9AT	Vishay General Semiconductor	40	4	440 @ 4 A	500 @ 40 V	DO-214AB, SMC	Tape & Reel (TR)	Active
SL44-E3/9AT	Vishay General Semiconductor	40	4	440 @ 4 A	500 @ 40 V	DO-214AB, SMC	Tape & Reel (TR)	Active
SL44-E3/57T	Vishay General Semiconductor	40	4	440 @ 4 A	500 @ 40 V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Active
SK44L_R1_00001	Panjit International Inc.	40	4	440 @ 4 A	200 @ 40 V	DO-214AB, SMC	Tape & Reel (TR)	Active
B340-13-F	Diodes Incorporated	40	3	500 @ 3 A	500 @ 40 V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Active
SK84L-TP	Micro Commercial Co	40	8	650 @ 8 A	1000 @ 40 V	DO-214AB, SMC	Tape & Reel (TR)	Not For New Designs

Engineering Selection Recommendations

Parametric Equivalent Selection (SL44-E3/9AT, SL44-E3/57T, SK44L_R1_00001):

These parts maintain identical electrical performance specifications to the SL44-M3/9AT. Selection between these equivalents is determined by packaging format availability and supply chain requirements. SL44-E3/9AT and SL44-M3/9AT are both supplied in Tape & Reel format. SL44-E3/57T is supplied in Cut Tape & Digi-Reel® format. SK44L_R1_00001 (Panjit International Inc.) exhibits lower reverse leakage current (200 µA versus 500 µA at 40 V), which may provide performance advantages in low-leakage applications. All three maintain Active product status and full RoHS3 compliance.

Manufacturer Recommended Alternatives (B340-13-F, SK84L-TP):

B340-13-F (Diodes Incorporated) operates at 3 A average rectified current with 500 mV forward voltage at 3 A. This part is suitable for applications where current requirements do not exceed 3 A and forward voltage margin is acceptable. Active product status and RoHS3 compliance are maintained.

SK84L-TP (Micro Commercial Co) is rated for 8 A average rectified current, providing higher current capacity than the SL44-M3/9AT. However, this part carries "Not For New Designs" product status and exhibits higher forward voltage (650 mV @ 8 A) and reverse leakage current (1 mA @ 40 V). Selection of SK84L-TP is limited to legacy design support or applications requiring the elevated current rating where forward voltage and leakage characteristics are acceptable.

All substitute parts maintain the DO-214AB (SMC) package configuration, surface mount mounting type, -55°C to 125°C operating temperature range (or extended), and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SL44-E3/9AT be used as a direct replacement for SL44-M3/9AT?

A: Yes. SL44-E3/9AT is a parametric equivalent with identical electrical specifications (40 V, 4 A, 440 mV forward voltage, 500 µA reverse leakage). Both are supplied by Vishay General Semiconductor in Tape & Reel format with Active product status. The parts are electrically and mechanically interchangeable.

Q: What is the difference between SL44-E3/57T and SL44-M3/9AT?

A: The electrical specifications are identical. The difference is packaging format: SL44-E3/57T is supplied in Cut Tape & Digi-Reel® format, while SL44-M3/9AT is supplied in Tape & Reel format. Selection depends on assembly equipment compatibility and supply chain requirements.

Q: Is SK44L_R1_00001 (Panjit) equivalent to SL44-M3/9AT?

A: SK44L_R1_00001 is a parametric equivalent with matching voltage (40 V), current (4 A), and forward voltage (440 mV @ 4 A) specifications. The reverse leakage current is lower (200 µA versus 500 µA at 40 V). Both parts use the DO-214AB (SMC) package and are Active status. The lower leakage characteristic may provide advantages in specific circuit applications.

Q: Can B340-13-F replace SL44-M3/9AT?

A: B340-13-F is not a direct replacement. While it maintains 40 V reverse voltage rating and DO-214AB package, it is rated for 3 A average rectified current (versus 4 A) with 500 mV forward voltage at 3 A (versus 440 mV @ 4 A). B340-13-F is suitable only for applications where current requirements do not exceed 3 A and forward voltage margin is acceptable.

Q: Why is SK84L-TP marked "Not For New Designs"?

A: SK84L-TP carries "Not For New Designs" product status, indicating the manufacturer has discontinued active development and support for this part. While it remains available in inventory (4204 pcs), it is not recommended for new circuit designs. Use of SK84L-TP is limited to legacy design support or maintenance applications.

Q: What are the key differences between SK84L-TP and SL44-M3/9AT?

A: SK84L-TP is rated for 8 A average rectified current (versus 4 A), providing higher current capacity. However, it exhibits higher forward voltage (650 mV @ 8 A versus 440 mV @ 4 A) and significantly higher reverse leakage current (1 mA @ 40 V versus 500 µA). SK84L-TP also supports extended operating temperature to 150°C. Selection of SK84L-TP is appropriate only when the elevated current rating is required and higher forward voltage and leakage are acceptable to the circuit design.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SL44-E3/9AT, SL44-E3/57T, SK44L_R1_00001, B340-13-F, SK84L-TP) are RoHS3 compliant and REACH unaffected, matching the compliance status of the SL44-M3/9AT.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) and Cut Tape & Digi-Reel® (CT) are different packaging and delivery formats for surface mount components. Tape & Reel is continuous reel format suitable for high-volume automated assembly. Cut Tape & Digi-Reel® provides smaller quantities in tape format with reel options. Selection depends on assembly equipment, order quantity, and supply chain logistics.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: Parametric equivalents (SL44-E3/9AT, SL44-E3/57T, SK44L_R1_00001) are fully interchangeable due to identical electrical specifications. Manufacturer recommended alternatives (B340-13-F, SK84L-TP) have different electrical characteristics and must be evaluated individually against circuit design requirements before substitution.

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