SSL32 M6G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL32 M6G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 20 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This device is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The SSL32 M6G operates across a junction temperature range of -55°C to 125°C and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	SSL32 M6G Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	410 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200 µA @ 20 V	µA
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SSL32 M6G is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Technology: Schottky (required)
Voltage - DC Reverse (Vr) (Max): 20 V (required)
Current - Average Rectified (Io): 3 A (required)
Mounting Type: Surface Mount (required)
Package / Case: DO-214AB or SMC (required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (required)

Secondary Compatibility Factors:

Operating Temperature Range: Minimum -55°C to maximum ≥ 125°C
RoHS Compliance: ROHS3 preferred for regulatory alignment
Moisture Sensitivity Level: MSL 1 (Unlimited)

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (20 V, 3 A, DO-214AB SMC): Parts meeting all primary criteria with identical voltage and current ratings in the same package form factor.

Category B - Functional Alternatives with Package Variations: Parts meeting all primary electrical criteria but available in alternative surface mount packages (SMA, SMB) or from different manufacturers with different forward voltage or leakage characteristics within acceptable engineering tolerances.

Parts with voltage ratings exceeding 20 V (such as B370Q-13-F at 70 V) or current ratings exceeding 3 A (such as B520CQ-13-F at 5 A) are listed as functional alternatives where design headroom is acceptable but represent over-specification relative to the SSL32 M6G baseline.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Temp Range [°C]	RoHS Status	Product Status
SSL32 M6G	Taiwan Semiconductor	20	3	410 @ 3A	200 @ 20V	DO-214AB (SMC)	-55 to 125	ROHS3	Discontinued
5820SMJ/TR13	Microchip Technology	20	3	460 @ 3A	1500 @ 20V	DO-214AB	-55 to 150	Non-compliant	Active
5820SMJE3/TR13	Microchip Technology	20	3	460 @ 3A	1500 @ 20V	DO-214AB	-55 to 150	ROHS3	Active
B320-13-F	Diodes Incorporated	20	3	500 @ 3A	500 @ 20V	DO-214AB (SMC)	-55 to 125	ROHS3	Active
B320A-13-F	Diodes Incorporated	20	3	500 @ 3A	500 @ 20V	DO-214AC (SMA)	-55 to 150	ROHS3	Active
B320B-13-F	Diodes Incorporated	20	3	500 @ 3A	500 @ 20V	DO-214AA (SMB)	-55 to 150	ROHS3	Active
B320Q-13-F	Diodes Incorporated	20	3	500 @ 3A	500 @ 20V	DO-214AB (SMC)	-55 to 150	ROHS3	Active
B370Q-13-F	Diodes Incorporated	70	3	790 @ 3A	500 @ 70V	DO-214AB (SMC)	-55 to 125	ROHS3	Active
B520C-13-F	Diodes Incorporated	20	5	550 @ 5A	500 @ 20V	DO-214AB (SMC)	-55 to 150	ROHS3	Active
B520CQ-13-F	Diodes Incorporated	20	5	550 @ 5A	500 @ 20V	DO-214AB (SMC)	-55 to 150	ROHS3	Active
CDBC320-HF	Comchip Technology	20	3	450 @ 3A	500 @ 20V	DO-214AB (SMC)	-50 to 150	ROHS3	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical and Package Specifications):

The 5820SMJE3/TR13 (Microchip Technology) is the primary recommended substitute. This part maintains 20 V reverse voltage and 3 A current ratings in DO-214AB package with RoHS3 compliance and active product status. The extended operating temperature range (-55°C to 150°C) provides additional thermal margin. Forward voltage is 460 mV at 3 A, representing a 50 mV increase from the SSL32 M6G baseline of 410 mV. Reverse leakage current is specified at 1500 µA at 20 V, compared to 200 µA for the original part. This part is available in Tape & Reel packaging with 1137 pieces in stock.

The CDBC320-HF (Comchip Technology) provides an alternative direct replacement with identical voltage and current ratings in DO-214AB SMC package. Forward voltage is 450 mV at 3 A, and reverse leakage is 500 µA at 20 V. Operating temperature range extends to 150°C. This part is RoHS3 compliant and active, with 1313 pieces in stock.

Same-Package Alternatives (20 V, 3 A, DO-214AB SMC):

The B320Q-13-F (Diodes Incorporated) meets all primary electrical criteria with 20 V reverse voltage and 3 A current in DO-214AB SMC package. This part includes AEC-Q101 automotive qualification and RoHS3 compliance. Operating temperature range is -55°C to 150°C. Forward voltage is 500 mV at 3 A. Inventory availability is 9400 pieces.

The B320-13-F (Diodes Incorporated) is functionally equivalent with identical voltage and current ratings in DO-214AB SMC package. Operating temperature range is -55°C to 125°C, matching the SSL32 M6G baseline. Forward voltage is 500 mV at 3 A. Inventory availability is 32400 pieces.

Alternative Package Options (20 V, 3 A, Different Surface Mount Packages):

The B320A-13-F (Diodes Incorporated) provides 20 V, 3 A performance in DO-214AC (SMA) package with AEC-Q101 automotive qualification and extended temperature range to 150°C. This option is suitable where SMA package footprint is acceptable. Inventory availability is 35100 pieces.

The B320B-13-F (Diodes Incorporated) provides 20 V, 3 A performance in DO-214AA (SMB) package with AEC-Q101 automotive qualification and extended temperature range to 150°C. This option is suitable where SMB package footprint is acceptable. Inventory availability is 344300 pieces.

Over-Specification Alternatives (Higher Voltage or Current Ratings):

The B520CQ-13-F (Diodes Incorporated) provides 20 V reverse voltage with 5 A current rating in DO-214AB SMC package. This part includes AEC-Q101 automotive qualification and RoHS3 compliance. Use this part only where the additional 2 A current capacity provides design margin. Forward voltage is 550 mV at 5 A. Inventory availability is 6400 pieces.

The B370Q-13-F (Diodes Incorporated) provides 70 V reverse voltage with 3 A current rating in DO-214AB SMC package. This part includes AEC-Q101 automotive qualification and RoHS3 compliance. Use this part only where the higher voltage rating is required for circuit protection margin. Forward voltage is 790 mV at 3 A. Inventory availability is 912 pieces.

Non-Compliant Alternative:

The 5820SMJ/TR13 (Microchip Technology) meets electrical criteria but is RoHS non-compliant. This part is suitable only for applications where RoHS compliance is not required. Forward voltage is 460 mV at 3 A with extended temperature range to 150°C. Inventory availability is 699 pieces.

Frequently Asked Questions (FAQ)

Q: Can the 5820SMJE3/TR13 directly replace the SSL32 M6G without PCB layout changes?

A: Yes. Both parts use the DO-214AB (SMC) surface mount package with identical footprint and pinout. No PCB layout modifications are required. The 5820SMJE3/TR13 is pin-compatible and mechanically interchangeable.

Q: What is the significance of the forward voltage difference between SSL32 M6G (410 mV) and substitute parts (450-500 mV)?

A: Forward voltage variation is a normal characteristic of Schottky diodes across different manufacturers and process lots. The 40-90 mV increase in forward voltage from substitute parts results in proportionally higher power dissipation at 3 A operating current. For a 3 A load, this represents an additional 120-270 mW of heat generation. Verify thermal design margins in the application circuit.

Q: Why do some substitute parts specify higher reverse leakage current (1500 µA or 500 µA) compared to the SSL32 M6G (200 µA)?

A: Reverse leakage current is temperature and voltage dependent and varies across manufacturers. Higher leakage specifications do not indicate inferior performance but reflect different measurement conditions or process technology. Verify that the application circuit design accommodates the specified leakage current at the maximum operating temperature.

Q: Is the B320A-13-F (SMA package) suitable as a replacement if my PCB is designed for DO-214AB (SMC)?

A: No. The B320A-13-F uses DO-214AC (SMA) package, which has a different footprint than DO-214AB (SMC). PCB layout modifications are required. Use B320-13-F or B320Q-13-F for direct DO-214AB SMC compatibility without layout changes.

Q: What is the difference between B320-13-F and B320Q-13-F?

A: Both parts are electrically identical with 20 V reverse voltage and 3 A current rating in DO-214AB SMC package. The B320Q-13-F includes AEC-Q101 automotive qualification and extended operating temperature range to 150°C, compared to 125°C for B320-13-F. Select B320Q-13-F for automotive applications or where extended temperature operation is required.

Q: Can I use B520CQ-13-F (5 A rating) in place of SSL32 M6G (3 A rating)?

A: Yes, electrically. The B520CQ-13-F maintains 20 V reverse voltage in DO-214AB SMC package and is rated for 5 A, providing 2 A additional current capacity. This represents over-specification relative to the SSL32 M6G baseline. Use this part only where the additional current rating provides design margin or where circuit requirements exceed 3 A.

Q: Is RoHS3 compliance required for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. The SSL32 M6G is RoHS3 compliant. Select substitute parts with ROHS3 Compliant status (5820SMJE3/TR13, B320-13-F, B320Q-13-F, B320A-13-F, B320B-13-F, B520CQ-13-F, B370Q-13-F, CDBC320-HF) for regulatory alignment. The 5820SMJ/TR13 is RoHS non-compliant and unsuitable for regulated applications.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape wound on reels, suitable for automated assembly processes with high-speed pick-and-place equipment. Cut Tape & Digi-Reel packaging is supplied in shorter tape segments on reels, suitable for lower-volume assembly or manual handling. Both formats contain the same component; packaging format selection depends on assembly process requirements.

Q: Can I use CDBC320-HF as a direct replacement without electrical circuit analysis?

A: CDBC320-HF is electrically compatible with identical 20 V reverse voltage and 3 A current rating in DO-214AB SMC package. However, forward voltage is 450 mV at 3 A (compared to 410 mV for SSL32 M6G) and reverse leakage is 500 µA at 20 V (compared to 200 µA). Verify that the application circuit design accommodates these parameter variations, particularly in low-voltage or high-precision applications where forward voltage drop affects circuit performance.

Q: What is the operating temperature range significance for my application?

A: The SSL32 M6G operates from -55°C to 125°C junction temperature. Most substitute parts extend this range to 150°C, providing additional thermal margin. If your application operates near the upper temperature limit, select parts with extended range (5820SMJE3/TR13, B320A-13-F, B320B-13-F, B320Q-13-F, B520C-13-F, B520CQ-13-F, CDBC320-HF). For applications with strict temperature constraints, verify that the substitute part's temperature range meets or exceeds your circuit requirements.

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