SS315HM6G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS315HM6G is a 150V, 3A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AB (SMC) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The device is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH regulations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Current - Reverse Leakage @ Vr	100	µA @ 150 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS315HM6G is determined by the following critical parameters: reverse voltage rating (150V), average rectified current (3A), forward voltage drop (950 mV @ 3A), reverse leakage current (100 µA @ 150V), fast recovery speed (≤500ns), surface mount DO-214AB package compatibility, and automotive AEC-Q101 qualification.

Substitute parts are grouped into three categories:

Direct Equivalent (Same Manufacturer): SS315H maintains identical electrical specifications and automotive qualification from Taiwan Semiconductor Corporation, with the primary difference being packaging format (Tape & Reel versus bulk).

Parametric Equivalent (Cross-Manufacturer): SS315C-HF from Comchip Technology provides matching voltage, current, and forward voltage specifications with AEC-Q101 qualification, though reverse leakage current differs (300 µA versus 100 µA).

Similar Specification (Higher Current Rating): CDBC5150-HF offers the same 150V reverse voltage and DO-214AB package but with 5A current rating, suitable for applications requiring higher current capacity within the same voltage class.

Similar Specification (Same Current Rating): CDBC3150-HF provides 150V, 3A ratings in DO-214AB package with lower forward voltage (870 mV @ 3A) and higher reverse leakage (500 µA @ 150V).

Parameter Comparison

Parameter	SS315HM6G	SS315H	SS315C-HF	CDBC3150-HF	CDBC5150-HF
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Comchip Technology	Comchip Technology	Comchip Technology
Voltage - DC Reverse (Vr) (Max)	150 V	150 V	150 V	150 V	150 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	5 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A	870 mV @ 3 A	870 mV @ 5 A
Current - Reverse Leakage @ Vr	100 µA @ 150 V	100 µA @ 150 V	300 µA @ 150 V	500 µA @ 150 V	500 µA @ 150 V
Speed	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-50 to 175°C	-50 to 175°C
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	Automotive	—	—
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	—	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Automotive AEC-Q101 Applications):

SS315H is the primary substitute for SS315HM6G. Both components are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications, automotive qualification, and AEC-Q101 certification. The only distinction is packaging format; SS315H is supplied in Tape & Reel format. This part is currently active in production with higher inventory availability (1129 pcs).

For Cross-Manufacturer Substitution (Automotive AEC-Q101 Applications):

SS315C-HF from Comchip Technology provides parametric equivalence with matching 150V, 3A, and 950 mV forward voltage specifications. This part maintains AEC-Q101 automotive qualification and ROHS3 compliance. Reverse leakage current is specified at 300 µA versus 100 µA for the original part. This component is active with 778 pcs in stock.

For Higher Current Capacity (Same Voltage Class):

CDBC5150-HF offers 5A current rating within the same 150V voltage class and DO-214AB package. This part is suitable for applications requiring increased current handling while maintaining voltage compatibility. Operating temperature range extends to 175°C. This part is active with highest inventory availability (5551 pcs).

For Lower Forward Voltage Drop (Same Current Rating):

CDBC3150-HF provides reduced forward voltage (870 mV @ 3A) compared to the original 950 mV specification, resulting in lower power dissipation. This part is active with 993 pcs in stock. Reverse leakage current is specified at 500 µA.

Frequently Asked Questions (FAQ)

Q: Can SS315H directly replace SS315HM6G in production?

A: Yes. SS315H is a direct equivalent from the same manufacturer with identical electrical specifications, automotive qualification, and AEC-Q101 certification. The packaging format differs (Tape & Reel versus bulk), but electrical performance and reliability characteristics are equivalent.

Q: What is the difference between SS315C-HF and SS315HM6G?

A: SS315C-HF is manufactured by Comchip Technology rather than Taiwan Semiconductor Corporation. Electrical specifications for voltage, current, and forward voltage are identical. Reverse leakage current is higher (300 µA versus 100 µA). Both maintain AEC-Q101 automotive qualification and ROHS3 compliance.

Q: Can CDBC5150-HF be used as a substitute for 3A applications?

A: CDBC5150-HF has a 5A current rating, which exceeds the 3A requirement of SS315HM6G. This part is suitable for applications requiring higher current capacity. The 150V reverse voltage rating and DO-214AB package are compatible. However, this part does not carry AEC-Q101 automotive qualification.

Q: What is the impact of different reverse leakage current specifications?

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures. SS315HM6G specifies 100 µA, while CDBC3150-HF and CDBC5150-HF specify 500 µA. SS315C-HF specifies 300 µA. Higher leakage current increases standby power consumption and heat generation. Selection depends on application sensitivity to leakage current.

Q: Are all substitute parts compatible with the DO-214AB package footprint?

A: Yes. All substitute parts listed use the DO-214AB (SMC) surface mount package. PCB footprints and reflow soldering processes are compatible without modification.

Q: Which substitute part has the lowest forward voltage drop?

A: CDBC3150-HF and CDBC5150-HF both specify 870 mV forward voltage at their respective current ratings, compared to 950 mV for SS315HM6G. This 80 mV reduction decreases power dissipation in rectification applications.

Q: Do all substitute parts meet automotive qualification requirements?

A: SS315H and SS315C-HF maintain AEC-Q101 automotive qualification matching the original SS315HM6G. CDBC3150-HF and CDBC5150-HF do not carry AEC-Q101 qualification. Selection depends on application automotive requirements.

Q: What is the operating temperature range difference between substitutes?

A: SS315HM6G, SS315H, and SS315C-HF specify -55°C to 150°C. CDBC3150-HF and CDBC5150-HF specify -50°C to 175°C, providing extended high-temperature operation capability.

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