SS15HR3G Equivalent & Substitute Parts

Part Overview

The SS15HR3G 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 repair applications. The part carries automotive-grade qualification (AEC-Q101) and ROHS3 compliance, making it suitable for demanding industrial and automotive environments.

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
Technology	Schottky	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS15HR3G is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or compatible surface mount packages

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse leakage current
Operating temperature range
Speed classification (Fast Recovery)
Compliance certifications (AEC-Q101, ROHS3)

Parts are grouped into three categories:

Parametric Equivalents: Identical electrical specifications and package, differing only in packaging format (tape & reel vs. cut tape).
Direct Manufacturer Equivalents: Same voltage and current ratings from alternative manufacturers with compatible packages and electrical characteristics.
Similar Parts: Same voltage and current ratings but with different package types (SMB vs. SMA) or higher current ratings (2A, 3A) for applications requiring increased current capacity.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Temp Range	Status
SS15HR3G	Taiwan Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	-55°C ~ 150°C	Discontinued
SS15 R3G	Taiwan Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	-55°C ~ 150°C	Discontinued
B150Q-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
B150-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 50 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
B150B-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	500 µA @ 50 V	DO-214AA (SMB)	-65°C ~ 150°C	Active
B250AQ-13-F	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	500 µA @ 50 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
HSM150JE3/TR13	Microchip Technology	50 V	1 A	690 mV @ 1 A	100 µA @ 50 V	DO-214BA	-55°C ~ 175°C	Active
SK35A-LTP	Micro Commercial Co	50 V	3 A	750 mV @ 3 A	500 µA @ 50 V	DO-214AC (SMA)	-50°C ~ 125°C	Not For New Designs
SS15-E3/5AT	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
SS15-E3/61T	Vishay General Semiconductor	50 V	1 A	750 mV @ 1 A	200 µA @ 50 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
SS25-LTP	Micro Commercial Co	50 V	2 A	700 mV @ 2 A	500 µA @ 50 V	DO-214AC (SMA)	-55°C ~ 125°C	Not For New Designs

Engineering Selection Recommendations

Preferred Direct Substitutes (Active Status, Identical Specifications):

The SS15-E3/5AT and SS15-E3/61T from Vishay General Semiconductor are the primary recommended substitutes. Both parts maintain identical electrical specifications to the SS15HR3G (50 V, 1 A, 750 mV forward voltage, 200 µA reverse leakage) in the same DO-214AC (SMA) package. Both are currently in active production status with extended operating temperature ranges (-65°C to 150°C). The difference between these two parts is packaging format: SS15-E3/5AT is supplied in Tape & Reel format, while SS15-E3/61T is supplied in Cut Tape & Digi-Reel format.

Alternative Direct Substitutes (Active Status, Minor Specification Variance):

The B150Q-13-F and B150-13-F from Diodes Incorporated are active production alternatives with identical voltage and current ratings. These parts exhibit slightly lower forward voltage (700 mV vs. 750 mV at 1 A) and higher reverse leakage current (500 µA vs. 200 µA at 50 V). Both carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance. The B150Q-13-F is supplied in Tape & Reel format, while B150-13-F is supplied in Cut Tape & Digi-Reel format. Both support extended operating temperature range (-65°C to 150°C).

Package Variant (Active Status, Different Package Type):

The B150B-13-F from Diodes Incorporated provides identical electrical performance to B150-13-F but in a DO-214AA (SMB) package instead of DO-214AC (SMA). This part is suitable only for applications where SMB package footprint is acceptable.

Higher Current Capacity Alternatives (Active Status, Increased Current Rating):

The B250AQ-13-F from Diodes Incorporated and SS25-LTP from Micro Commercial Co both provide 2 A current capacity at 50 V reverse voltage. These parts are suitable for applications requiring increased current handling. B250AQ-13-F is in active production with automotive qualification (AEC-Q101), while SS25-LTP is marked "Not For New Designs."

Higher Current Capacity Alternative (Active Status, Increased Current Rating):

The SK35A-LTP from Micro Commercial Co provides 3 A current capacity at 50 V reverse voltage in the DO-214AC (SMA) package. This part is marked "Not For New Designs" and exhibits a reduced operating temperature range (-50°C to 125°C).

Alternative Package Type (Active Status, Different Package):

The HSM150JE3/TR13 from Microchip Technology maintains 50 V, 1 A specifications but uses a DO-214BA package instead of DO-214AC. This part exhibits lower forward voltage (690 mV vs. 750 mV) and lower reverse leakage current (100 µA vs. 200 µA), with an extended upper operating temperature limit (175°C vs. 150°C).

Frequently Asked Questions (FAQ)

Q: Can I use B150Q-13-F as a direct replacement for SS15HR3G?

A: Yes. Both parts are rated for 50 V reverse voltage and 1 A average rectified current in compatible DO-214AC (SMA) packages. The B150Q-13-F exhibits slightly lower forward voltage (700 mV vs. 750 mV) and higher reverse leakage current (500 µA vs. 200 µA), which are within acceptable operating margins for most applications. B150Q-13-F is in active production status with automotive qualification (AEC-Q101) and ROHS3 compliance.

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

A: Both parts are electrically identical with 50 V, 1 A specifications and identical forward voltage and reverse leakage characteristics. The difference is 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. Selection depends on your assembly process requirements.

Q: Can I use B150B-13-F instead of SS15HR3G?

A: B150B-13-F is electrically equivalent to B150-13-F but uses a DO-214AA (SMB) package instead of DO-214AC (SMA). This part can only be used if your PCB layout and assembly process accommodate the SMB package footprint. The SMB package is physically larger than SMA.

Q: Is HSM150JE3/TR13 compatible with SS15HR3G?

A: HSM150JE3/TR13 maintains the same 50 V, 1 A electrical ratings but uses a DO-214BA package instead of DO-214AC (SMA). Package compatibility depends on your PCB footprint design. The part exhibits superior electrical characteristics (lower forward voltage and reverse leakage) and extended temperature range (up to 175°C).

Q: Can I use B250AQ-13-F or SS25-LTP for higher current applications?

A: Yes. Both parts are rated for 2 A average rectified current at 50 V reverse voltage, compared to 1 A for the SS15HR3G. These parts are suitable for applications requiring increased current capacity. B250AQ-13-F is in active production with automotive qualification, while SS25-LTP is marked "Not For New Designs."

Q: Can I use SK35A-LTP for even higher current requirements?

A: SK35A-LTP provides 3 A current capacity at 50 V in the DO-214AC (SMA) package. However, this part is marked "Not For New Designs" and exhibits a reduced operating temperature range (-50°C to 125°C) compared to the original SS15HR3G (-55°C to 150°C). Use only if current requirements exceed 2 A and temperature constraints are acceptable.

Q: Are all substitute parts ROHS3 compliant and AEC-Q101 qualified?

A: All listed substitute parts are ROHS3 compliant. However, not all carry automotive-grade AEC-Q101 qualification. The B150Q-13-F, B150-13-F, and B250AQ-13-F from Diodes Incorporated carry AEC-Q101 qualification. The Vishay SS15-E3 series and Microchip HSM150JE3/TR13 do not list AEC-Q101 qualification in the provided specifications. Verify qualification requirements for your specific application.

Q: What is the primary reason to substitute the SS15HR3G?

A: The SS15HR3G is discontinued at DiGi Electronics. The recommended substitutes (SS15-E3/5AT and SS15-E3/61T from Vishay) provide identical electrical specifications and package compatibility while maintaining active production status and full compliance certifications.

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