SSL32HM6G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL32HM6G 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 functionally equivalent alternatives 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
Manufacturer Part Number	SSL32HM6G
Manufacturer	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	3A
Voltage - Forward (Vf) (Max) @ If	410 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 20 V
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 125°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SSL32HM6G 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): 3A minimum
Technology: Schottky
Package / Case: DO-214AB (SMC) or compatible surface mount package
Operating Temperature Range: Must support -55°C to 125°C minimum
Mounting Type: Surface Mount

Compliance Considerations:

Automotive Grade and AEC-Q101 qualification preferred for direct replacement
ROHS3 compliance required for new designs
RoHS non-compliant parts acceptable only for legacy applications

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical and mechanical specifications) and Functional Equivalents (meeting or exceeding all critical parameters with acceptable variations in forward voltage or reverse leakage).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Package	Temp Range	AEC-Q101	RoHS Status	Product Status
SSL32HM6G	Taiwan Semiconductor	20 V	3A	410 mV @ 3A	200 µA @ 20V	DO-214AB (SMC)	-55°C ~ 125°C	Yes	ROHS3	Discontinued
SSL32H	Taiwan Semiconductor	20 V	3A	410 mV @ 3A	200 µA @ 20V	DO-214AB (SMC)	-55°C ~ 125°C	Yes	ROHS3	Active
5820SMJ/TR13	Microchip Technology	20 V	3A	460 mV @ 3A	1.5 mA @ 20V	DO-214AB	-55°C ~ 150°C	No	Non-compliant	Active
5820SMJE3/TR13	Microchip Technology	20 V	3A	460 mV @ 3A	1.5 mA @ 20V	DO-214AB	-55°C ~ 150°C	No	ROHS3	Active
B320-13-F	Diodes Incorporated	20 V	3A	500 mV @ 3A	500 µA @ 20V	DO-214AB (SMC)	-55°C ~ 125°C	No	ROHS3	Active
B320A-13-F	Diodes Incorporated	20 V	3A	500 mV @ 3A	500 µA @ 20V	DO-214AC (SMA)	-55°C ~ 150°C	Yes	ROHS3	Active
B320B-13-F	Diodes Incorporated	20 V	3A	500 mV @ 3A	500 µA @ 20V	DO-214AA (SMB)	-55°C ~ 150°C	Yes	ROHS3	Active
B320Q-13-F	Diodes Incorporated	20 V	3A	500 mV @ 3A	500 µA @ 20V	DO-214AB (SMC)	-55°C ~ 150°C	Yes	ROHS3	Active
B370Q-13-F	Diodes Incorporated	70 V	3A	790 mV @ 3A	500 µA @ 70V	DO-214AB (SMC)	-55°C ~ 125°C	Yes	ROHS3	Active
B520C-13-F	Diodes Incorporated	20 V	5A	550 mV @ 5A	500 µA @ 20V	DO-214AB (SMC)	-55°C ~ 150°C	No	ROHS3	Active
B520CQ-13-F	Diodes Incorporated	20 V	5A	550 mV @ 5A	500 µA @ 20V	DO-214AB (SMC)	-55°C ~ 150°C	Yes	ROHS3	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Identical Specifications):

SSL32H (Taiwan Semiconductor Corporation) is the primary direct substitute. This part maintains identical electrical characteristics (20V, 3A, 410 mV forward voltage) and package configuration (DO-214AB SMC). It carries active product status, AEC-Q101 qualification, and ROHS3 compliance. This part is recommended as the first choice for direct substitution in existing designs.

Tier 2 - Functional Equivalents (20V, 3A, DO-214AB SMC Package):

B320Q-13-F (Diodes Incorporated) provides functional equivalence with identical voltage and current ratings in the same package. This part features AEC-Q101 qualification and extended operating temperature range (-55°C to 150°C). Forward voltage is specified at 500 mV @ 3A, representing a 90 mV increase over the SSL32HM6G. Reverse leakage current is 500 µA @ 20V, higher than the original specification. This part is suitable for applications where the higher forward voltage and leakage current are acceptable.

B320-13-F (Diodes Incorporated) offers the same electrical ratings and package but lacks AEC-Q101 qualification. This part is suitable for non-automotive applications requiring 20V, 3A Schottky rectification in SMC package.

Tier 3 - Functional Equivalents (20V, 3A, Alternative Packages):

B320A-13-F (Diodes Incorporated) provides 20V, 3A performance in SMA package (DO-214AC). This part includes AEC-Q101 qualification and extended temperature range. Package substitution requires PCB layout modification.

B320B-13-F (Diodes Incorporated) provides 20V, 3A performance in SMB package (DO-214AA). This part includes AEC-Q101 qualification and extended temperature range. Package substitution requires PCB layout modification.

Tier 4 - Higher Current Alternatives (20V, 5A):

B520CQ-13-F (Diodes Incorporated) provides 20V at 5A rating in DO-214AB SMC package with AEC-Q101 qualification. This part is suitable only for applications where higher current capacity is required and the circuit design accommodates the increased current rating.

B520C-13-F (Diodes Incorporated) provides 20V at 5A rating without AEC-Q101 qualification. This part is suitable for non-automotive applications requiring higher current capacity.

Tier 5 - Higher Voltage Alternative (70V, 3A):

B370Q-13-F (Diodes Incorporated) provides 70V at 3A rating in DO-214AB SMC package with AEC-Q101 qualification. This part is suitable only for applications requiring higher reverse voltage rating. Forward voltage is 790 mV @ 3A, significantly higher than the original specification.

Microchip Technology Alternatives:

5820SMJE3/TR13 (Microchip Technology) provides 20V, 3A performance with ROHS3 compliance and extended temperature range (-55°C to 150°C). Forward voltage is 460 mV @ 3A. This part is suitable for applications where RoHS compliance is required and slightly higher forward voltage is acceptable.

5820SMJ/TR13 (Microchip Technology) provides 20V, 3A performance without RoHS compliance. This part is suitable only for legacy applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can SSL32H be used as a direct replacement for SSL32HM6G?

A: Yes. SSL32H is manufactured by the same company (Taiwan Semiconductor Corporation) and maintains identical electrical specifications (20V, 3A, 410 mV forward voltage) and package configuration (DO-214AB SMC). The primary difference is packaging format (Tape & Reel versus bulk). Both parts carry AEC-Q101 qualification and ROHS3 compliance.

Q: What is the difference between B320Q-13-F and SSL32HM6G?

A: Both parts provide 20V, 3A Schottky rectification in DO-214AB SMC package. B320Q-13-F has a forward voltage specification of 500 mV @ 3A compared to 410 mV for the SSL32HM6G, representing a 90 mV increase. Reverse leakage current is 500 µA @ 20V for B320Q-13-F versus 200 µA @ 20V for SSL32HM6G. B320Q-13-F offers extended operating temperature range (-55°C to 150°C) and includes AEC-Q101 qualification.

Q: Can I use B320A-13-F or B320B-13-F as replacements?

A: B320A-13-F and B320B-13-F provide equivalent electrical performance (20V, 3A) but in different packages (SMA and SMB respectively). These parts are suitable only if the PCB layout can accommodate the different package footprint. Both parts include AEC-Q101 qualification and extended temperature range.

Q: Why would I choose B520CQ-13-F over SSL32HM6G?

A: B520CQ-13-F is rated for 5A instead of 3A at 20V. This part is selected only when the application requires higher current capacity. The higher current rating results in increased forward voltage (550 mV @ 5A) and higher reverse leakage current (500 µA @ 20V). This part includes AEC-Q101 qualification and extended temperature range.

Q: Is B370Q-13-F a suitable replacement?

A: B370Q-13-F is not a direct replacement. This part is rated for 70V reverse voltage instead of 20V, resulting in significantly higher forward voltage (790 mV @ 3A). This part is selected only for applications requiring higher reverse voltage rating. The higher voltage rating makes it unsuitable for 20V circuits.

Q: What is the difference between RoHS-compliant and non-compliant parts?

A: ROHS3-compliant parts (SSL32H, 5820SMJE3/TR13, B320Q-13-F, B320B-13-F, B520CQ-13-F, B370Q-13-F) meet European Union restrictions on hazardous substances. Non-compliant parts (5820SMJ/TR13, B320-13-F, B520C-13-F) may contain restricted substances. ROHS3 compliance is required for new designs and applications subject to EU regulations.

Q: Can I use Microchip Technology parts as replacements?

A: 5820SMJE3/TR13 (Microchip Technology) provides functional equivalence with 20V, 3A performance, ROHS3 compliance, and extended temperature range. Forward voltage is 460 mV @ 3A, slightly higher than SSL32HM6G. This part is suitable for applications where the higher forward voltage is acceptable. 5820SMJ/TR13 lacks RoHS compliance and is suitable only for legacy applications.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive electronics qualification standard. Parts carrying this qualification have undergone rigorous testing for reliability and performance in automotive environments. For automotive applications, AEC-Q101 qualification is required. For non-automotive applications, this qualification is not necessary but indicates higher reliability standards.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. Higher forward voltage results in greater power dissipation and reduced efficiency. SSL32HM6G specifies 410 mV @ 3A. Substitutes with higher forward voltage (B320Q-13-F at 500 mV, 5820SMJE3/TR13 at 460 mV) will increase power dissipation. Circuit design must accommodate these variations.

Q: What is reverse leakage current and why does it matter?

A: Reverse leakage current (Ir) is the small current that flows through the diode when reverse-biased. SSL32HM6G specifies 200 µA @ 20V. Higher leakage current (B320Q-13-F at 500 µA, 5820SMJE3/TR13 at 1.5 mA) increases power dissipation and may affect circuit performance in high-impedance applications. For most applications, these variations are acceptable.

Q: Can I mix different substitute parts in the same circuit?

A: All substitute parts listed maintain the same 20V, 3A core specifications and are electrically compatible. However, mixing parts with different forward voltage or leakage current specifications may result in uneven current distribution in parallel configurations. For consistency and predictable performance, use the same part number throughout a circuit.

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