SS15HM2G Equivalent & Substitute Parts

Part Overview

The SS15HM2G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing production and maintenance applications. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant, making it suitable for automotive and industrial applications requiring fast recovery Schottky diode performance.

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	-55 to 150	°C
Technology	Schottky	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS15HM2G is determined by the following critical parameters: voltage rating (50 V minimum), current rating (1 A minimum), package type (DO-214AC/SMA preferred for direct mechanical compatibility), forward voltage characteristics, reverse leakage current, and fast recovery speed specification. Parts are grouped into three categories based on substitution suitability:

Parametric Equivalents share identical electrical specifications and package type, differing only in packaging format (tape and reel versus cut tape).

Direct Manufacturer Substitutes meet or exceed all electrical specifications with the same or compatible package footprint, though may have different reverse leakage or forward voltage characteristics within acceptable ranges.

Similar Substitutes maintain the 50 V / 1 A core rating and fast recovery speed but may differ in package type (SMB versus SMA), current rating (2 A or 3 A), or reverse leakage specifications. These require mechanical and thermal evaluation before implementation.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Reverse Leakage @ Vr	Package	Product Status	Temp Range
SS15HM2G	Taiwan Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	Discontinued	-55 to 150°C
SS15 R3G	Taiwan Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	Discontinued	-55 to 150°C
B150Q-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 40 V	DO-214AC (SMA)	Active	-65 to 150°C
B150-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 50 V	DO-214AC (SMA)	Active	-65 to 150°C
B150B-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 50 V	DO-214AA (SMB)	Active	-65 to 150°C
B250AQ-13-F	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	500 µA @ 50 V	DO-214AC (SMA)	Active	-65 to 150°C
HSM150JE3/TR13	Microchip Technology	50 V	1 A	690 mV @ 1 A	100 µA @ 50 V	DO-214BA	Active	-55 to 175°C
SK35A-LTP	Micro Commercial Co	50 V	3 A	750 mV @ 3 A	500 µA @ 50 V	DO-214AC (SMA)	Not For New Designs	-50 to 125°C
SS15-E3/5AT	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	Active	-65 to 150°C
SS15-E3/61T	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	Active	-65 to 150°C
SS25-LTP	Micro Commercial Co	50 V	2 A	700 mV @ 2 A	500 µA @ 50 V	DO-214AC (SMA)	Not For New Designs	-55 to 125°C

Engineering Selection Recommendations

Preferred Substitutes for Direct Replacement:

SS15-E3/5AT and SS15-E3/61T (Vishay General Semiconductor) are the primary recommended substitutes. Both parts are active products with identical electrical specifications to the SS15HM2G, matching the 50 V / 1 A rating, 750 mV forward voltage, and 200 µA reverse leakage. Both are ROHS3 compliant and AEC-Q101 qualified. The difference between these two parts is packaging format: SS15-E3/5AT is supplied in tape and reel format, while SS15-E3/61T is supplied in cut tape with Digi-Reel. Both maintain the DO-214AC (SMA) package footprint and support the full operating temperature range of -65 to 150°C.

Secondary Substitutes with Minor Electrical Differences:

B150-13-F and B150Q-13-F (Diodes Incorporated) are active products with identical voltage and current ratings. These parts exhibit slightly lower forward voltage (700 mV versus 750 mV at 1 A) and higher reverse leakage (500 µA at 50 V versus 200 µA). Both are AEC-Q101 qualified and ROHS3 compliant. B150-13-F is supplied in cut tape format, while B150Q-13-F is supplied in tape and reel. Both support extended operating temperature range (-65 to 150°C).

Higher Current Alternatives:

B250AQ-13-F (Diodes Incorporated) and SS25-LTP (Micro Commercial Co) are rated for 2 A average rectified current, providing current margin above the 1 A requirement. B250AQ-13-F is an active product with AEC-Q101 qualification and ROHS3 compliance. SS25-LTP is marked "Not For New Designs" and has a reduced operating temperature range (-55 to 125°C).

Higher Current Alternative with Package Variation:

SK35A-LTP (Micro Commercial Co) is rated for 3 A average rectified current in the DO-214AC (SMA) package. This part is marked "Not For New Designs" and has a reduced operating temperature range (-50 to 125°C), limiting its suitability for new applications.

Alternative Package Option:

B150B-13-F (Diodes Incorporated) provides equivalent electrical performance in the DO-214AA (SMB) package instead of SMA. This part is active and AEC-Q101 qualified but requires PCB layout modification due to different package footprint.

Microchip Alternative:

HSM150JE3/TR13 (Microchip Technology) is an active product with superior reverse leakage characteristics (100 µA at 50 V) and extended temperature range (-55 to 175°C). However, this part uses the DO-214BA package, which differs mechanically from the DO-214AC (SMA) package of the original part.

Frequently Asked Questions (FAQ)

Q: Can SS15-E3/5AT and SS15-E3/61T be used interchangeably with SS15HM2G?

A: Yes. Both parts are electrically and mechanically identical to the SS15HM2G, with the same 50 V / 1 A rating, 750 mV forward voltage, and 200 µA reverse leakage. The only difference is packaging format: SS15-E3/5AT is tape and reel, while SS15-E3/61T is cut tape with Digi-Reel. Both fit the same DO-214AC (SMA) footprint and support the same operating temperature range.

Q: What is the difference between B150-13-F and B150Q-13-F?

A: Both parts are electrically identical with 50 V / 1 A ratings and 700 mV forward voltage. The difference is packaging: B150-13-F is supplied in cut tape format, while B150Q-13-F is supplied in tape and reel. Both are active products with AEC-Q101 qualification.

Q: Can I use B250AQ-13-F as a substitute for SS15HM2G?

A: Yes, with thermal margin consideration. B250AQ-13-F is rated for 2 A average rectified current, exceeding the 1 A requirement of the SS15HM2G. It maintains the same 50 V voltage rating, DO-214AC (SMA) package, and AEC-Q101 qualification. The higher current rating provides design margin but does not affect electrical compatibility at 1 A operation.

Q: Why does HSM150JE3/TR13 have a different package designation?

A: HSM150JE3/TR13 uses the DO-214BA package instead of DO-214AC (SMA). While both are surface mount packages with similar physical dimensions, the DO-214BA has a different pin configuration and footprint. PCB layout verification is required before substitution.

Q: Can I use B150B-13-F as a substitute?

A: B150B-13-F is electrically compatible but uses the DO-214AA (SMB) package instead of DO-214AC (SMA). The SMB package is larger than SMA and has a different footprint. This part requires PCB layout modification and is suitable only when space constraints permit the larger package.

Q: What is the significance of "Not For New Designs" status?

A: Parts marked "Not For New Designs" (SK35A-LTP and SS25-LTP) are legacy products with limited availability and may be discontinued in the future. These parts are suitable for maintenance and repair of existing equipment but should not be selected for new product development. Prefer active products such as SS15-E3/5AT, SS15-E3/61T, or B150-13-F for new designs.

Q: Are all substitute parts AEC-Q101 qualified?

A: Not all. SS15-E3/5AT, SS15-E3/61T, B150-13-F, B150Q-13-F, B150B-13-F, and B250AQ-13-F carry AEC-Q101 qualification. HSM150JE3/TR13, SK35A-LTP, and SS25-LTP do not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 compliance, select from the qualified parts.

Q: What is the difference in reverse leakage between the original part and substitutes?

A: The SS15HM2G specifies 200 µA reverse leakage at 50 V. Diodes Incorporated parts (B150-13-F, B150Q-13-F, B250AQ-13-F) specify 500 µA at 50 V, representing higher leakage. HSM150JE3/TR13 specifies 100 µA at 50 V, representing lower leakage. Vishay parts (SS15-E3/5AT, SS15-E3/61T) match the original specification at 200 µA. Higher leakage increases power dissipation in reverse bias conditions; lower leakage reduces standby current.

Q: Can I mix packaging formats in production?

A: Packaging format (tape and reel versus cut tape) affects supply chain logistics and assembly line compatibility but does not affect electrical performance or PCB compatibility. Both SS15-E3/5AT (tape and reel) and SS15-E3/61T (cut tape) are suitable for the same application. Select based on assembly equipment requirements and inventory management practices.

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