SS32HM6G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS32HM6G is a 20V, 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 production and repair applications. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant, making it suitable for automotive and industrial applications requiring fast recovery rectification.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 20 V
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 125°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS32HM6G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max) @ If: 500 mV or lower at 3 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: DO-214AB, SMC (for direct mechanical compatibility)
Technology: Schottky

Direct Equivalents maintain identical electrical specifications and DO-214AB SMC packaging, enabling pin-for-pin replacement without circuit modification.

Functional Equivalents meet or exceed the electrical performance requirements but may differ in package type (SMA, SMB) or current rating (5A), requiring mechanical board layout adjustment or providing enhanced performance margin.

Limited Substitutes exceed voltage or current specifications beyond application requirements and are listed for reference only when higher performance margins are necessary.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	RoHS Status	AEC-Q101
SS32HM6G	Taiwan Semiconductor Corporation	20 V	3 A	500 mV @ 3 A	DO-214AB, SMC	Discontinued	ROHS3	Yes
B320Q-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AB, SMC	Active	ROHS3	Yes
5820SMJ/TR13	Microchip Technology	20 V	3 A	460 mV @ 3 A	DO-214AB	Active	Non-compliant	No
5820SMJE3/TR13	Microchip Technology	20 V	3 A	460 mV @ 3 A	DO-214AB	Active	ROHS3	No
B320A-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AC, SMA	Active	ROHS3	Yes
B320B-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AA, SMB	Active	ROHS3	Yes
CDBC320-HF	Comchip Technology	20 V	3 A	450 mV @ 3 A	DO-214AB, SMC	Active	ROHS3	No
B370Q-13-F	Diodes Incorporated	70 V	3 A	790 mV @ 3 A	DO-214AB, SMC	Active	ROHS3	Yes
B520CQ-13-F	Diodes Incorporated	20 V	5 A	550 mV @ 5 A	DO-214AB, SMC	Active	ROHS3	Yes

Engineering Selection Recommendations

Recommended Direct Equivalent:

B320Q-13-F (Diodes Incorporated) is the primary substitute for SS32HM6G. This part maintains identical electrical specifications (20V, 3A, 500mV forward voltage), identical DO-214AB SMC packaging for direct board compatibility, active product status ensuring long-term availability, AEC-Q101 automotive qualification, and ROHS3 compliance. This part enables pin-for-pin replacement without circuit modification.

Alternative Direct Equivalent:

CDBC320-HF (Comchip Technology) provides equivalent 20V, 3A performance in DO-214AB SMC packaging with improved forward voltage characteristics (450mV @ 3A). This part is active and ROHS3 compliant. AEC-Q101 qualification is not listed; verification of automotive suitability is required for applications with automotive qualification mandates.

Functional Equivalents with Package Variation:

B320A-13-F (Diodes Incorporated, SMA package) and B320B-13-F (Diodes Incorporated, SMB package) provide identical electrical performance with different surface mount packages. These parts require board layout modification but maintain AEC-Q101 qualification and ROHS3 compliance. Selection depends on available board space and thermal management requirements.

Higher Current Capability:

B520CQ-13-F (Diodes Incorporated, 5A rating) provides enhanced current capacity while maintaining 20V reverse voltage and DO-214AB SMC packaging. This part is suitable for applications requiring performance margin above 3A specification. AEC-Q101 qualified and ROHS3 compliant.

Not Recommended for Direct Substitution:

5820SMJ/TR13 and 5820SMJE3/TR13 (Microchip Technology) meet electrical specifications but lack AEC-Q101 automotive qualification. Use only in non-automotive applications or where automotive qualification is not required.

B370Q-13-F (Diodes Incorporated, 70V rating) exceeds voltage specification and exhibits higher forward voltage (790mV @ 3A). This part is suitable only for applications requiring higher voltage margin and is not a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can B320Q-13-F directly replace SS32HM6G without board modification?

A: Yes. B320Q-13-F maintains identical electrical specifications (20V, 3A, 500mV Vf) and DO-214AB SMC packaging, enabling direct pin-for-pin replacement without circuit or board layout modification.

Q: What is the difference between B320Q-13-F, B320A-13-F, and B320B-13-F?

A: These parts share identical electrical specifications (20V, 3A, 500mV Vf) but differ in package type. B320Q-13-F uses DO-214AB (SMC), B320A-13-F uses DO-214AC (SMA), and B320B-13-F uses DO-214AA (SMB). Package selection depends on board layout and thermal requirements. All three are AEC-Q101 qualified.

Q: Is CDBC320-HF suitable for automotive applications?

A: CDBC320-HF meets electrical specifications and is ROHS3 compliant but does not carry AEC-Q101 automotive qualification. Use in automotive applications only if qualification requirement can be waived or if application-specific qualification is performed.

Q: Why is B370Q-13-F listed as a substitute if it has 70V rating?

A: B370Q-13-F is listed for reference in applications where higher voltage margin is required. It is not a direct substitute due to higher forward voltage (790mV @ 3A) and different voltage rating. Use only when 70V reverse voltage capability is necessary.

Q: Can B520CQ-13-F replace SS32HM6G in a 3A application?

A: Yes, electrically and mechanically. B520CQ-13-F provides 5A current rating in identical DO-214AB SMC packaging with 20V reverse voltage. The higher current rating provides performance margin but does not affect 3A operation. Thermal dissipation characteristics may differ; verify thermal design if thermal management is critical.

Q: What is the significance of RoHS3 compliance?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is mandatory for many industrial and consumer applications. SS32HM6G and most recommended substitutes are ROHS3 compliant.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. B320Q-13-F has 9,400 pieces in stock, B320B-13-F has 344,300 pieces, and CDBC320-HF has 1,313 pieces. Availability varies significantly. Verify current inventory status with supplier for production planning.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is the Automotive Electronics Council qualification standard for discrete semiconductors. It certifies the part meets automotive industry reliability, quality, and performance requirements. This qualification is mandatory for automotive applications and recommended for industrial applications requiring high reliability.

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