SMBJ7.5A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ7.5A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 7.5V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and operational specifications to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7.5	V
Voltage - Breakdown (Min)	8.33	V
Voltage - Clamping (Max) @ Ipp	12.9	V
Current - Peak Pulse (10/1000µs)	46.5	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	-
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ7.5A-E3/5B are classified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Clamping (Max) @ Ipp: 12.9V (±0.2V tolerance acceptable)
Current - Peak Pulse (10/1000µs): 46.5A (±0.7A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Grouping Logic:

Group 1 - Direct Electrical Equivalents (Same Manufacturer - Vishay): Parts with identical electrical specifications and packaging from the same manufacturer, differing only in tape reel configuration or internal manufacturing codes.

Group 2 - Cross-Manufacturer Equivalents: Parts from different manufacturers (Central Semiconductor Corp, Diodes Incorporated, MDD) with matching electrical parameters and SMB package compatibility.

Group 3 - Partial Electrical Variants: Parts with minor deviations in clamping voltage or peak pulse current within acceptable engineering tolerances while maintaining the 7.5V standoff voltage class.

Group 4 - Higher Performance Alternative: Parts with elevated voltage and current ratings that provide enhanced transient protection capability for applications requiring additional margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Inventory
SMBJ7.5A-E3/5B	Vishay	7.5V	12.9V	46.5A	600W	-55 to 150°C	865 Pcs
SMBJ7.5A-E3/52	Vishay	7.5V	12.9V	46.5A	600W	-55 to 150°C	1850 Pcs
SMBJ7.5D-M3/I	Vishay	7.5V	12.7V	47.2A	600W	-55 to 150°C	8465 Pcs
1SMB7.5A TR13 PBFREE	Central Semiconductor Corp	7.5V	12.9V	46.5A	600W	-65 to 150°C	3699 Pcs
SMBJ7.5A-13-F	Diodes Incorporated	7.5V	12.9V	46.5A	600W	-55 to 150°C	24100 Pcs
SM6T10A	STMicroelectronics	8.55V	18.6V	215A (8/20µs)	600W	-55 to 150°C	15230 Pcs
SMBJ7.5A	MDD	7.5V	12.9V	46.6A	600W	-50 to 150°C	22713 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SMBJ7.5A-E3/52 (Vishay), SMBJ7.5A-13-F (Diodes Incorporated), and SMBJ7.5A (MDD) are direct functional equivalents to the SMBJ7.5A-E3/5B. All three parts maintain the 7.5V reverse standoff voltage, 12.9V clamping voltage, and 46.5A peak pulse current specifications. All are ROHS3 compliant and rated for -55°C to -50°C minimum operating temperature. Selection among these options is based on inventory availability and supply chain requirements.

For Enhanced Transient Protection:

The SM6T10A (STMicroelectronics) provides higher voltage and current ratings (8.55V standoff, 18.6V clamping, 215A peak pulse) and is suitable for applications requiring additional transient suppression margin. This part is not a direct replacement but serves as an alternative for designs where enhanced protection is specified.

For Extended Low-Temperature Operation:

The 1SMB7.5A TR13 PBFREE (Central Semiconductor Corp) extends the minimum operating temperature to -65°C, providing wider thermal range coverage while maintaining electrical equivalence to the primary part.

For Partial Electrical Variants:

The SMBJ7.5D-M3/I (Vishay) exhibits minor deviations in clamping voltage (12.7V) and peak pulse current (47.2A) within acceptable engineering tolerances for the 7.5V standoff voltage class.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.5A-E3/52 be used as a direct replacement for SMBJ7.5A-E3/5B?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications: 7.5V reverse standoff voltage, 12.9V clamping voltage, 46.5A peak pulse current, and 600W peak pulse power. The difference is in tape reel configuration (E3/52 vs. E3/5B). Both are ROHS3 compliant and rated for -55°C to 150°C operation.

Q: What is the difference between SMBJ7.5A-13-F and SMBJ7.5A-E3/5B?

A: SMBJ7.5A-13-F is manufactured by Diodes Incorporated while SMBJ7.5A-E3/5B is from Vishay. Electrically, they are equivalent: both specify 7.5V reverse standoff, 12.9V clamping voltage, and 46.5A peak pulse current. Both use DO-214AA SMB packaging and are ROHS3 compliant. The primary difference is manufacturer and supply chain availability.

Q: Is SM6T10A a suitable replacement for SMBJ7.5A-E3/5B?

A: SM6T10A is not a direct replacement. It operates at a higher voltage class (8.55V reverse standoff vs. 7.5V) with significantly higher clamping voltage (18.6V vs. 12.9V) and peak pulse current (215A vs. 46.5A). Use SM6T10A only when circuit design specifications explicitly require enhanced transient protection beyond the 7.5V class parameters.

Q: Can SMBJ7.5D-M3/I replace SMBJ7.5A-E3/5B in all applications?

A: SMBJ7.5D-M3/I is functionally compatible for most applications. It maintains the 7.5V reverse standoff voltage but exhibits minor variations: clamping voltage of 12.7V (vs. 12.9V) and peak pulse current of 47.2A (vs. 46.5A). These deviations fall within acceptable engineering tolerances for the 7.5V TVS diode class. Verify circuit margin requirements before substitution.

Q: What is the difference between tape reel configurations (E3/5B vs. E3/52)?

A: Tape reel configurations (E3/5B and E3/52) refer to different packaging and delivery formats from the same manufacturer. Electrically and functionally, the parts are identical. The configuration affects only procurement, handling, and automated assembly processes. Selection is based on manufacturing line compatibility and supply chain logistics.

Q: Does the 1SMB7.5A TR13 PBFREE offer any advantage over SMBJ7.5A-E3/5B?

A: The 1SMB7.5A TR13 PBFREE extends the minimum operating temperature to -65°C compared to -55°C for the SMBJ7.5A-E3/5B. Electrical specifications are identical. Select this part only if your application requires operation below -55°C. For standard temperature ranges, both parts are functionally equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SMBJ7.5A-E3/52, SMBJ7.5D-M3/I, 1SMB7.5A TR13 PBFREE, SMBJ7.5A-13-F, SM6T10A, and SMBJ7.5A from MDD) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

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