Equivalent & Substitute Parts for SS15-E3/5AT

Part Overview

The SS15-E3/5AT 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 or superior electrical performance within the same package footprint, enabling direct board-level replacement or design flexibility for procurement optimization.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the SS15-E3/5AT are classified into three categories based on electrical and mechanical compatibility:

Parametric Equivalents (Vishay General Semiconductor - Diodes Division): Parts B150-E3/61T, B150-M3/61T, and SS15-E3/61T match all critical electrical parameters (50 V reverse voltage, 1 A average rectified current, 750 mV forward voltage drop, fast recovery speed, 200 µA reverse leakage) and share the identical DO-214AC (SMA) package footprint. These parts differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and base product series designation, with no impact on electrical performance or board-level compatibility.

Direct Manufacturer Substitutes (Cross-Manufacturer): The STPS160A (STMicroelectronics) provides superior voltage rating (60 V versus 50 V) and improved reverse leakage characteristics (4 µA versus 200 µA), while maintaining identical current rating (1 A), package format (DO-214AC/SMA), and fast recovery speed. The STPS1L40A (STMicroelectronics) operates at reduced voltage (40 V) with lower forward voltage drop (500 mV versus 750 mV) and reduced reverse leakage (35 µA), suitable for lower-voltage applications requiring improved efficiency.

Manufacturer-Recommended Alternatives: The SS15 (Taiwan Semiconductor Corporation) and SS15 R3G (Taiwan Semiconductor Corporation) deliver identical electrical specifications (50 V, 1 A, 750 mV forward voltage, 200 µA reverse leakage) with DO-214AC (SMA) package compatibility. The SS15 R3G is listed as Discontinued at DiGi Electronics; the SS15 remains Active with higher inventory availability.

Substitution eligibility is determined by: (1) matching or exceeding reverse voltage rating, (2) matching or exceeding average rectified current, (3) forward voltage drop compatibility with circuit design margins, (4) identical or superior reverse leakage performance, (5) identical package footprint (DO-214AC/SMA), and (6) compliance with RoHS3 and REACH requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Reverse Leakage @ Vr [µA]	Package	Product Status	Inventory [Pcs]
SS15-E3/5AT	Vishay General Semiconductor	50	1	750	200 @ 50V	DO-214AC (SMA)	Active	5225
B150-E3/61T	Vishay General Semiconductor	50	1	750	200 @ 50V	DO-214AC (SMA)	Active	10972
B150-M3/61T	Vishay General Semiconductor	50	1	750	200 @ 50V	DO-214AC (SMA)	Active	15671
SS15-E3/61T	Vishay General Semiconductor	50	1	750	200 @ 50V	DO-214AC (SMA)	Active	18200
STPS160A	STMicroelectronics	60	1	670	4 @ 60V	DO-214AC (SMA)	Active	30100
SS15	Taiwan Semiconductor Corporation	50	1	750	200 @ 50V	DO-214AC (SMA)	Active	50950
SS15 R3G	Taiwan Semiconductor Corporation	50	1	750	200 @ 50V	DO-214AC (SMA)	Discontinued at DiGi Electronics	1688
STPS1L40A	STMicroelectronics	40	1	500	35 @ 40V	DO-214AC (SMA)	Active	55300

Engineering Selection Recommendations

Primary Equivalents: B150-E3/61T, B150-M3/61T, and SS15-E3/61T are direct parametric equivalents to SS15-E3/5AT. Selection among these three is determined by packaging format availability and supply chain requirements. All three maintain Active product status, full RoHS3 compliance, and MSL 1 (Unlimited) moisture sensitivity rating. SS15-E3/61T offers the highest inventory level (18,200 pcs) among Vishay equivalents.

Cross-Manufacturer Upgrade: STPS160A (STMicroelectronics) is suitable for applications where the 50 V rating of the original part provides insufficient design margin. The 60 V rating and significantly reduced reverse leakage (4 µA versus 200 µA) improve reliability in high-temperature or high-frequency switching environments. Forward voltage drop is reduced to 670 mV, enhancing power efficiency. This part is Active with substantial inventory (30,100 pcs).

Lower-Voltage Alternative: STPS1L40A (STMicroelectronics) is applicable only to circuits designed for 40 V maximum reverse voltage operation. The 500 mV forward voltage drop provides superior efficiency compared to the 750 mV specification of the original part. This part is Active with the highest inventory availability (55,300 pcs) among all listed substitutes.

Manufacturer-Recommended Alternatives: SS15 (Taiwan Semiconductor Corporation) is an Active equivalent with identical electrical specifications and the highest inventory level across all substitutes (50,950 pcs). SS15 R3G is not recommended for new designs due to Discontinued status at DiGi Electronics, despite remaining in limited inventory (1,688 pcs).

All substitute parts maintain RoHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) rating, ensuring compatibility with standard surface mount assembly processes and long-term storage requirements.

Frequently Asked Questions (FAQ)

Q: Can B150-E3/61T be used as a direct replacement for SS15-E3/5AT on existing circuit boards?

A: Yes. B150-E3/61T is a parametric equivalent with identical electrical specifications (50 V, 1 A, 750 mV forward voltage, 200 µA reverse leakage) and the same DO-214AC (SMA) package footprint. No circuit modifications or board redesign are required.

Q: What is the difference between SS15-E3/5AT and SS15-E3/61T?

A: Both parts are manufactured by Vishay General Semiconductor and share identical electrical parameters. The difference is in packaging format: SS15-E3/5AT is supplied in Tape & Reel (TR) format, while SS15-E3/61T is supplied in Cut Tape (CT) & Digi-Reel format. Electrical performance and board-level compatibility are unchanged.

Q: Is STPS160A a suitable replacement for SS15-E3/5AT?

A: STPS160A is a cross-manufacturer substitute with superior voltage rating (60 V versus 50 V) and improved reverse leakage (4 µA versus 200 µA). It is suitable for applications where the original 50 V rating is marginal or where reduced leakage current improves circuit performance. The DO-214AC (SMA) package footprint is identical, enabling direct board-level substitution.

Q: Can STPS1L40A replace SS15-E3/5AT in all applications?

A: No. STPS1L40A operates at a reduced maximum reverse voltage of 40 V, compared to 50 V for the original part. It is suitable only for circuits designed to operate at 40 V or lower. The lower forward voltage drop (500 mV versus 750 mV) provides improved efficiency in compatible applications. The DO-214AC (SMA) package footprint is identical.

Q: Why is SS15 R3G listed as Discontinued at DiGi Electronics?

A: SS15 R3G has been discontinued at DiGi Electronics as a stocking item, though limited inventory (1,688 pcs) remains available. For new designs and ongoing production, the Active equivalent SS15 (Taiwan Semiconductor Corporation) is recommended, offering identical electrical specifications with significantly higher inventory availability (50,950 pcs).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts—B150-E3/61T, B150-M3/61T, SS15-E3/61T, STPS160A, SS15, SS15 R3G, and STPS1L40A—are RoHS3 Compliant and REACH Unaffected, meeting regulatory requirements for electronic component manufacturing and assembly.

Q: What is the significance of MSL 1 (Unlimited) rating for these diodes?

A: MSL 1 (Unlimited) indicates that these surface mount diodes have unlimited shelf life and do not require special moisture-controlled storage or baking procedures prior to assembly. This simplifies inventory management and reduces handling costs compared to higher MSL-rated components.

Q: Can I use STPS160A in a circuit originally designed for SS15-E3/5AT without circuit modifications?

A: Yes. STPS160A has a higher voltage rating (60 V) and lower reverse leakage (4 µA), making it electrically compatible with circuits designed for 50 V operation. The identical DO-214AC (SMA) package footprint enables direct board-level substitution. The improved specifications may enhance circuit reliability and efficiency.

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