SSL34HR7G Equivalent & Substitute Parts

Part Overview

The SSL34HR7G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	410 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SSL34HR7G is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 3 A minimum
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AB (SMC) or equivalent surface mount packages

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitute parts may exceed the SSL34HR7G specification of 410 mV @ 3 A, provided the value does not compromise circuit performance
Current - Reverse Leakage @ Vr: Substitute parts may exceed 500 µA @ 40 V within acceptable limits
Operating Temperature - Junction: Substitute parts may extend the upper temperature limit beyond 125°C
RoHS Compliance: Substitute parts must maintain RoHS3 compliance or equivalent environmental standards

Substitute parts are grouped by package type (SMC, SMA, SMB) and manufacturer. Parts with identical electrical ratings but different package configurations are listed separately to allow selection based on PCB layout requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package / Case	Tj (Operating)	Product Status	RoHS Status
SSL34HR7G	Taiwan Semiconductor Corporation	40 V	3 A	410 mV @ 3 A	DO-214AB, SMC	-55°C ~ 125°C	Discontinued	RoHS3 Compliant
5822SMJ/TR13	Microchip Technology	40 V	3 A	500 mV @ 3 A	DO-214AB, SMC	-55°C ~ 150°C	Active	RoHS Non-compliant
B340-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	DO-214AB, SMC	-55°C ~ 125°C	Active	RoHS3 Compliant
B340A-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	DO-214AC, SMA	-55°C ~ 150°C	Active	RoHS3 Compliant
B340B-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	DO-214AA, SMB	-55°C ~ 150°C	Active	RoHS3 Compliant
B340LA-13-F	Diodes Incorporated	40 V	3 A	450 mV @ 3 A	DO-214AC, SMA	-55°C ~ 125°C	Active	RoHS3 Compliant
B340LB-13-F	Diodes Incorporated	40 V	3 A	450 mV @ 3 A	DO-214AA, SMB	-55°C ~ 125°C	Active	RoHS3 Compliant
B340Q-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	DO-214AB, SMC	-55°C ~ 150°C	Active	RoHS3 Compliant
B540C-13-F	Diodes Incorporated	40 V	5 A	550 mV @ 5 A	DO-214AB, SMC	-55°C ~ 150°C	Active	RoHS3 Compliant
B540CQ-13-F	Diodes Incorporated	40 V	5 A	550 mV @ 5 A	DO-214AB, SMC	-55°C ~ 150°C	Active	RoHS3 Compliant
CDBC340-G	Comchip Technology	40 V	3 A	500 mV @ 3 A	DO-214AB, SMC	-55°C ~ 125°C	Active	RoHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Identical Package and Electrical Rating):

For applications requiring direct replacement in DO-214AB (SMC) package with 40 V / 3 A rating, the following parts are recommended based on active product status and RoHS3 compliance:

B340-13-F (Diodes Incorporated): Active status, RoHS3 compliant, identical electrical specifications, 51,465 units in stock
B340Q-13-F (Diodes Incorporated): Active status, RoHS3 compliant, extended temperature range (-55°C ~ 150°C), 18,040 units in stock
CDBC340-G (Comchip Technology): Active status, RoHS3 compliant, identical electrical specifications, 3,700 units in stock

Alternative Package Options (Same Electrical Rating):

For designs permitting package substitution:

B340A-13-F (SMA package): Automotive-grade, AEC-Q101 qualified, extended temperature range, 335,400 units in stock
B340B-13-F (SMB package): Automotive-grade, AEC-Q101 qualified, extended temperature range, 95,300 units in stock
B340LA-13-F (SMA package): Lower forward voltage (450 mV @ 3 A), 674,468 units in stock
B340LB-13-F (SMB package): Lower forward voltage (450 mV @ 3 A), 71,300 units in stock

Higher Current Rating Option:

For applications where current capacity exceeds 3 A:

B540C-13-F or B540CQ-13-F (5 A rating): Maintains 40 V reverse voltage, suitable for higher current requirements

Non-Compliant Alternative:

5822SMJ/TR13 (Microchip Technology): Active status, extended temperature range, but RoHS non-compliant; use only where RoHS compliance is not required

Frequently Asked Questions (FAQ)

Q: Can B340-13-F directly replace SSL34HR7G?

A: Yes. Both parts share identical electrical specifications (40 V, 3 A, Schottky technology) and the same DO-214AB (SMC) package. B340-13-F is active, RoHS3 compliant, and widely available.

Q: What is the difference between B340-13-F and B340Q-13-F?

A: Both are DO-214AB (SMC) packages with identical electrical ratings. B340Q-13-F is supplied in Tape & Reel (TR) packaging and supports an extended operating temperature range (-55°C ~ 150°C) compared to B340-13-F (-55°C ~ 125°C). Select based on packaging requirements and temperature specifications.

Q: Can I use B340A-13-F or B340B-13-F as substitutes?

A: Yes, both are electrically equivalent (40 V, 3 A) and RoHS3 compliant. However, they use different packages: B340A-13-F is SMA (DO-214AC) and B340B-13-F is SMB (DO-214AA). Package substitution requires PCB layout verification to ensure mechanical compatibility.

Q: What is the advantage of B340LA-13-F over B340-13-F?

A: B340LA-13-F has a lower forward voltage specification (450 mV @ 3 A versus 500 mV @ 3 A), resulting in reduced power dissipation. This may be beneficial in power-sensitive applications. Both are RoHS3 compliant and available in SMA package.

Q: Why is 5822SMJ/TR13 listed if it is RoHS non-compliant?

A: 5822SMJ/TR13 meets all electrical and mechanical substitution criteria (40 V, 3 A, DO-214AB package, Schottky technology). It is included for reference in applications where RoHS compliance is not a requirement. For new designs, RoHS3-compliant alternatives are preferred.

Q: Can B540C-13-F replace SSL34HR7G?

A: B540C-13-F is electrically compatible in terms of voltage (40 V) and package (DO-214AB, SMC), but it is rated for 5 A instead of 3 A. It can be used in applications where the higher current rating is acceptable or beneficial, but it is not a direct replacement for 3 A-limited designs.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. Parts carrying this qualification (such as B340A-13-F, B340B-13-F, and B340Q-13-F) meet stringent reliability and performance requirements for automotive applications.

Q: Are all substitute parts available in the same packaging format?

A: No. Substitute parts are available in multiple packaging formats: Cut Tape (CT), Digi-Reel®, and Tape & Reel (TR). Verify packaging requirements with your procurement process before ordering.

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