SS15-M3/5AT Equivalent & Substitute Parts

Part Overview

The SS15-M3/5AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active and fully compliant with RoHS3 and REACH regulations. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and manufacturing standards. Alternative part numbers may be required due to inventory availability, manufacturing discontinuation, or supply chain optimization while maintaining circuit performance within specified parameters.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	750	mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS15-M3/5AT are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 50 V reverse voltage rating, 1 A average rectified current, 750 mV forward voltage drop at 1 A, fast recovery speed, and DO-214AC (SMA) surface mount package. These parts are direct functional replacements with no circuit performance variation.

Manufacturer Recommended Substitutes include parts that meet the primary electrical requirements (50 V, 1 A, fast recovery, SMA package) but may exhibit minor variations in secondary parameters such as forward voltage, reverse leakage current, or operating temperature range. These parts are qualified alternatives when primary equivalents are unavailable.

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Ir @ Vr [µA]	Tj (Min-Max) [°C]	Package	Product Status
SS15-M3/5AT	Vishay General Semiconductor - Diodes Division	50	1	750	200 @ 40V	-65 to 150	DO-214AC (SMA)	Active
B150-E3/61T	Vishay General Semiconductor - Diodes Division	50	1	750	200 @ 50V	-65 to 150	DO-214AC (SMA)	Active
B150-M3/61T	Vishay General Semiconductor - Diodes Division	50	1	750	200 @ 50V	-65 to 150	DO-214AC (SMA)	Active
SS15-E3/61T	Vishay General Semiconductor - Diodes Division	50	1	750	200 @ 50V	-65 to 150	DO-214AC (SMA)	Active
B150-13-F	Diodes Incorporated	50	1	700	500 @ 50V	-65 to 150	DO-214AC (SMA)	Active
MBRA140T3G	onsemi	40	1	550	500 @ 40V	-55 to 125	DO-214AC (SMA)	Active
SS15	Taiwan Semiconductor Corporation	50	1	750	200 @ 50V	-55 to 150	DO-214AC (SMA)	Active
SS15 R3G	Taiwan Semiconductor Corporation	50	1	750	200 @ 50V	-55 to 150	DO-214AC (SMA)	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Parametric Equivalent Selection (Preferred): Parts B150-E3/61T, B150-M3/61T, and SS15-E3/61T are direct parametric equivalents to SS15-M3/5AT. All three maintain identical electrical specifications including 50 V reverse voltage, 1 A current rating, 750 mV forward voltage, and fast recovery characteristics. All are manufactured by Vishay General Semiconductor - Diodes Division or Taiwan Semiconductor Corporation, carry Active product status, and comply with RoHS3 and REACH requirements. These parts are suitable for direct substitution without circuit redesign.

Manufacturer Recommended Alternatives: B150-13-F (Diodes Incorporated) meets the primary electrical requirements of 50 V, 1 A, and fast recovery operation. Forward voltage is reduced to 700 mV at 1 A, representing improved efficiency. Reverse leakage current is elevated to 500 µA at 50 V compared to 200 µA in the primary part. This part is Active and RoHS3 compliant.

SS15 (Taiwan Semiconductor Corporation) provides parametric equivalence with identical electrical specifications and Active status. Operating temperature range extends to -55°C minimum (compared to -65°C in SS15-M3/5AT), which is acceptable for most industrial applications.

Limited Substitution: MBRA140T3G (onsemi) operates at 40 V maximum reverse voltage, which is below the 50 V specification of SS15-M3/5AT. This part is suitable only for applications where the actual reverse voltage stress does not exceed 40 V. Forward voltage is reduced to 550 mV at 1 A. Operating temperature range is -55°C to 125°C. This part should be selected only when circuit voltage requirements are confirmed below 40 V.

SS15 R3G (Taiwan Semiconductor Corporation) is discontinued at DiGi Electronics and should not be selected for new designs or procurement.

Frequently Asked Questions (FAQ)

Q: Can B150-13-F replace SS15-M3/5AT in all applications? A: B150-13-F is electrically compatible for circuits operating at 50 V or below. The reduced forward voltage (700 mV vs. 750 mV) improves efficiency. Reverse leakage current is higher (500 µA vs. 200 µA), which may affect performance in high-impedance circuits. Both parts use identical DO-214AC (SMA) packages and operate across the same temperature range (-65°C to 150°C).

Q: Is MBRA140T3G a suitable substitute? A: MBRA140T3G is suitable only for applications where the actual reverse voltage does not exceed 40 V. The part is rated for 40 V maximum, below the 50 V specification of SS15-M3/5AT. Forward voltage performance is superior (550 mV vs. 750 mV). Operating temperature range is narrower (-55°C to 125°C vs. -65°C to 150°C). Verify circuit voltage requirements before selection.

Q: What is the difference between SS15-M3/5AT and SS15-E3/61T? A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications: 50 V, 1 A, 750 mV forward voltage, and fast recovery characteristics. The primary difference is packaging format: SS15-M3/5AT is supplied in Tape & Reel (TR), while SS15-E3/61T is supplied in Cut Tape (CT) & Digi-Reel®. Electrical performance and DO-214AC (SMA) package are identical.

Q: Are all substitute parts RoHS3 compliant? A: All substitute parts listed are RoHS3 compliant and REACH unaffected. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use SS15 from Taiwan Semiconductor Corporation instead of the Vishay part? A: Yes. SS15 from Taiwan Semiconductor Corporation provides parametric equivalence with identical electrical specifications and Active product status. Operating temperature minimum is -55°C (compared to -65°C in SS15-M3/5AT), which is acceptable for most industrial and commercial applications. Both use DO-214AC (SMA) packages.

Q: Why is SS15 R3G listed if it is discontinued? A: SS15 R3G is included in the reference for historical traceability and legacy design documentation. This part is discontinued at DiGi Electronics and should not be selected for new designs or procurement. Use active alternatives such as B150-E3/61T, B150-M3/61T, or SS15-E3/61T instead.

Q: What packaging options are available for equivalent parts? A: Parametric equivalents are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. All parts use the same DO-214AC (SMA) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly equipment.

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