SS32HR7G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS32HR7G 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 is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH regulations.

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
Technology	Schottky
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the SS32HR7G is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria (Exact Match Required):

Voltage - DC Reverse (Vr) (Max): 20 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Mounting Type: Surface Mount
Fast Recovery Speed: ≤ 500ns, > 200mA (Io)

Package Compatibility:

Direct equivalents maintain DO-214AB (SMC) package
Alternative packages (SMA, SMB) are listed as similar parts with different form factors

Compliance Considerations:

AEC-Q101 qualification preferred for automotive applications
ROHS3 compliance required for new designs
Operating temperature range must accommodate application requirements

Parts are grouped into two categories:

Direct Equivalents - Identical electrical specifications and DO-214AB package
Similar Parts - Matching core electrical parameters with alternative packages or voltage ratings

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Package	Temp Range	AEC-Q101	ROHS3	Status
SS32HR7G	Taiwan Semiconductor	20 V	3 A	500 mV @ 3 A	DO-214AB (SMC)	-55°C ~ 125°C	Yes	Yes	Discontinued
B320Q-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AB (SMC)	-55°C ~ 150°C	Yes	Yes	Active
5820SMJ/TR13	Microchip Technology	20 V	3 A	460 mV @ 3 A	DO-214AB	-55°C ~ 150°C	No	No	Active
5820SMJE3/TR13	Microchip Technology	20 V	3 A	460 mV @ 3 A	DO-214AB	-55°C ~ 150°C	No	Yes	Active
B320A-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AC (SMA)	-55°C ~ 150°C	Yes	Yes	Active
B320B-13-F	Diodes Incorporated	20 V	3 A	500 mV @ 3 A	DO-214AA (SMB)	-55°C ~ 150°C	Yes	Yes	Active
B370Q-13-F	Diodes Incorporated	70 V	3 A	790 mV @ 3 A	DO-214AB (SMC)	-55°C ~ 125°C	Yes	Yes	Active
B520C-13-F	Diodes Incorporated	20 V	5 A	550 mV @ 5 A	DO-214AB (SMC)	-55°C ~ 150°C	No	Yes	Active
B520CQ-13-F	Diodes Incorporated	20 V	5 A	550 mV @ 5 A	DO-214AB (SMC)	-55°C ~ 150°C	Yes	Yes	Active
CDBC320-HF	Comchip Technology	20 V	3 A	450 mV @ 3 A	DO-214AB (SMC)	-50°C ~ 150°C	No	Yes	Active
CDBC520-HF	Comchip Technology	20 V	5 A	500 mV @ 5 A	DO-214AB (SMC)	-50°C ~ 175°C	No	Yes	Active

Engineering Selection Recommendations

Recommended Direct Equivalent:

B320Q-13-F (Diodes Incorporated) is the primary substitute for SS32HR7G. This part maintains identical electrical specifications (20V, 3A, 500mV forward voltage), identical package (DO-214AB SMC), AEC-Q101 automotive qualification, and ROHS3 compliance. Operating temperature range extends to 150°C, providing improved thermal margin. Product status is active with 9400 units in stock.

Alternative Equivalents with Identical Electrical Performance:

5820SMJE3/TR13 (Microchip Technology) provides matching 20V, 3A specifications in DO-214AB package with ROHS3 compliance and active product status. However, this part lacks AEC-Q101 qualification. Forward voltage is specified at 460mV, representing a 40mV improvement over the original specification.

Package Alternatives (Electrical Equivalents):

B320A-13-F and B320B-13-F (Diodes Incorporated) provide identical electrical performance with alternative surface mount packages (SMA and SMB respectively). These parts are suitable for applications where PCB layout accommodates different form factors. Both maintain AEC-Q101 qualification and ROHS3 compliance.

Higher Current Alternatives:

B520CQ-13-F and B520C-13-F (Diodes Incorporated) provide 5A current rating in 20V, DO-214AB package. These parts are suitable for applications requiring increased current capacity. B520CQ-13-F includes AEC-Q101 qualification; B520C-13-F does not.

Higher Voltage Alternative:

B370Q-13-F (Diodes Incorporated) provides 70V reverse voltage rating with 3A current in DO-214AB package. This part is suitable for applications requiring higher voltage blocking capability. AEC-Q101 qualification and ROHS3 compliance are maintained.

Non-Recommended Substitutes:

5820SMJ/TR13 (Microchip Technology) lacks both AEC-Q101 qualification and ROHS3 compliance, limiting applicability to non-automotive and legacy applications.

CDBC320-HF (Comchip Technology) lacks AEC-Q101 qualification and specifies a reduced minimum operating temperature of -50°C versus -55°C.

Frequently Asked Questions (FAQ)

Q: Can B320Q-13-F directly replace SS32HR7G without PCB modifications?

A: Yes. B320Q-13-F maintains identical electrical specifications and DO-214AB package footprint. No PCB layout changes are required.

Q: What is the difference between B320Q-13-F and 5820SMJE3/TR13?

A: Both parts provide 20V, 3A Schottky rectification in DO-214AB package. B320Q-13-F includes AEC-Q101 automotive qualification; 5820SMJE3/TR13 does not. Forward voltage differs slightly (500mV vs 460mV at 3A). For automotive applications, B320Q-13-F is specified.

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

A: These parts provide identical electrical performance but use different surface mount packages (SMA and SMB respectively). Substitution requires PCB redesign to accommodate the alternative package footprint. Both maintain automotive qualification.

Q: Why would I select B520CQ-13-F over B320Q-13-F?

A: B520CQ-13-F provides 5A current rating versus 3A. Selection depends on application current requirements. Both maintain 20V reverse voltage and DO-214AB package. Use B520CQ-13-F only if circuit design requires the higher current capacity.

Q: Is CDBC320-HF suitable for automotive applications?

A: CDBC320-HF lacks AEC-Q101 qualification and is not recommended for automotive applications. This part is suitable for industrial and consumer applications where automotive qualification is not required.

Q: What is the significance of the operating temperature range difference between SS32HR7G (-55°C to 125°C) and B320Q-13-F (-55°C to 150°C)?

A: B320Q-13-F provides extended upper temperature rating. If the original application operates near 125°C junction temperature, B320Q-13-F offers improved thermal margin. For applications with maximum junction temperatures below 125°C, both parts are functionally equivalent.

Q: Can I use B370Q-13-F in place of SS32HR7G?

A: B370Q-13-F is not a direct substitute. This part provides 70V reverse voltage versus 20V, resulting in higher forward voltage drop (790mV vs 500mV at 3A). Use B370Q-13-F only when circuit design specifically requires higher voltage blocking capability.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. For new designs and applications subject to environmental regulations, ROHS3 compliant parts are required. B320Q-13-F and 5820SMJE3/TR13 are ROHS3 compliant; 5820SMJ/TR13 is not.

Q: Are there inventory considerations when selecting a substitute?

A: B320Q-13-F has 9400 units in stock, providing reliable availability. 5820SMJE3/TR13 has 1137 units available. CDBC320-HF has 1313 units. Inventory levels should be evaluated against production volume and lead time requirements.

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