SMBJ8.0A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ8.0A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 8V reverse standoff voltage class and provides transient protection in general-purpose applications. The part is actively produced and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when electrical characteristics, package compatibility, and operational parameters align within specified tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	8	V
Voltage - Breakdown (Min)	8.89	V
Voltage - Clamping (Max) @ Ipp	13.6	V
Current - Peak Pulse (10/1000µs)	44.1	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ8.0A-E3/5B are classified based on strict electrical and mechanical parameter alignment:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 8V reverse standoff voltage, 8.89V minimum breakdown voltage, 13.6V maximum clamping voltage, 44.1A peak pulse current (10/1000µs), and 600W peak pulse power. These parts are interchangeable in applications where the original part number is specified. Direct substitutes include SMBJ8.0A-13-F (Diodes Incorporated) and SMBJ8.0A-TP (Micro Commercial Co).

Upgrade Substitutes provide equivalent or superior performance within the same voltage class. The SMBJ8.0A (MDD) maintains all critical electrical parameters with peak pulse current of 44.2A, representing negligible variance from the original specification.

Alternative Substitutes operate within the same voltage class but with different electrical characteristics. The SM6T10A (STMicroelectronics) features a higher reverse standoff voltage of 8.55V, elevated clamping voltage of 18.6V, and significantly higher peak pulse current of 215A (8/20µs). This part is suitable only when higher transient energy absorption is required.

Parameter Comparison

Parameter	SMBJ8.0A-E3/5B (Vishay)	SMBJ8.0A-13-F (Diodes Inc)	SMBJ8.0A-TP (MCC)	SMBJ8.0A (MDD)	SM6T10A (STMicro)
Voltage - Reverse Standoff (Typ)	8V	8V	8V	8V	8.55V
Voltage - Breakdown (Min)	8.89V	8.89V	8.89V	8.89V	9.5V
Voltage - Clamping (Max) @ Ipp	13.6V	13.6V	13.6V	13.6V	18.6V
Current - Peak Pulse (10/1000µs)	44.1A	44.1A	44.1A	44.2A	215A (8/20µs)
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature (TJ)	-55 to 150°C	-55 to 150°C	-55 to 175°C	-50 to 150°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: SMBJ8.0A-13-F and SMBJ8.0A-TP are functionally equivalent to the SMBJ8.0A-E3/5B. Both parts maintain identical electrical specifications and package compatibility. Selection between these options depends on supply chain availability and lead time requirements. All three direct substitutes carry active product status and ROHS3 compliance.

For Equivalent Performance: SMBJ8.0A (MDD) provides equivalent performance with negligible variance in peak pulse current (44.2A versus 44.1A). This part is suitable for direct substitution and offers the highest inventory availability (26,100 units). Operating temperature range is -50 to 150°C, which is acceptable for most general-purpose applications within the specified -55 to 150°C envelope.

For Enhanced Protection: SM6T10A (STMicroelectronics) is recommended only when circuit design requires higher transient energy absorption. The elevated clamping voltage (18.6V) and peak pulse current (215A at 8/20µs) indicate this part is designed for more severe transient environments. This substitution requires circuit-level validation to confirm voltage clamping compatibility with downstream components.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.0A-13-F replace SMBJ8.0A-E3/5B directly?

A: Yes. SMBJ8.0A-13-F maintains identical electrical specifications (8V standoff, 13.6V clamping, 44.1A peak pulse) and DO-214AA/SMB package compatibility. The parts are functionally interchangeable.

Q: What is the difference between SMBJ8.0A-TP and SMBJ8.0A-E3/5B?

A: Electrical specifications are identical. SMBJ8.0A-TP offers extended operating temperature range (-55 to 175°C versus -55 to 150°C) and is manufactured by Micro Commercial Co. Package and performance characteristics remain equivalent.

Q: Is SM6T10A a suitable substitute?

A: SM6T10A operates in the same voltage class but with different electrical characteristics. Clamping voltage is 18.6V (versus 13.6V) and peak pulse current is 215A (versus 44.1A). This part is suitable only when circuit design requires higher transient energy absorption. Voltage clamping compatibility with downstream components must be verified.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 rating, meeting regulatory requirements for lead-free manufacturing and moisture sensitivity.

Q: Which substitute offers the best availability?

A: SMBJ8.0A (MDD) has the highest inventory level at 26,100 units. This part provides equivalent performance with negligible variance in peak pulse current and is recommended for applications where supply chain continuity is a priority.

Q: Can I use SMBJ8.0A-TP in high-temperature applications?

A: SMBJ8.0A-TP supports operating temperatures up to 175°C (junction temperature), compared to 150°C for the original part. This extended range makes it suitable for elevated-temperature environments within the specified limit.

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