SMBJ8.0HE3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ8.0HE3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with an 8V reverse standoff voltage and provides 15V maximum clamping voltage at peak pulse current. The part is housed in a DO-214AA (SMB) surface mount package and is qualified to AEC-Q101 automotive standards.

The SMBJ8.0HE3/52 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting the same packaging and environmental requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	8	V
Voltage - Breakdown (Min)	8.89	V
Voltage - Clamping (Max) @ Ipp	15	V
Current - Peak Pulse (10/1000µs)	40	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	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ8.0HE3/52 are classified based on electrical parameter compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Reverse Standoff (Typ): 8V
Voltage - Breakdown (Min): 8.89V
Package / Case: DO-214AA or SMB
Mounting Type: Surface Mount
Unidirectional Channels: 1

Acceptable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 13.6V to 15V (within transient suppression design tolerance)
Current - Peak Pulse (10/1000µs): 35.3A to 44.2A (within 600W power dissipation envelope)
Operating Temperature Range: -50°C to -65°C minimum (all exceed -55°C requirement)

Group 1: Direct Electrical Equivalents Parts maintaining 8V standoff voltage, 8.89V minimum breakdown, and clamping voltage between 13.6V and 15V are classified as direct substitutes. These parts preserve circuit protection characteristics within design specifications.

Group 2: Higher Voltage Rating Alternatives The SMBJ10A operates at 10V standoff voltage with 11V minimum breakdown. This part provides higher voltage protection and is suitable only when circuit design permits increased clamping voltage (17V maximum).

Parameter Comparison

Parameter	SMBJ8.0HE3/52 (Vishay)	SMBJ8.0E3/TR13 (Microchip)	SMBJ8.0A (MDD)	SMBJ8.0A-13-F (Diodes Inc.)	SMBJ8V0A (Fairchild)	SMBJ10A (MDD)
Voltage - Reverse Standoff (Typ)	8V	8V	8V	8V	8V	10V
Voltage - Breakdown (Min)	8.89V	8.89V	8.89V	8.89V	8.89V	11V
Voltage - Clamping (Max) @ Ipp	15V	15V	13.6V	13.6V	13.6V	17V
Current - Peak Pulse (10/1000µs)	40A	40A	44.2A	44.1A	44.1A	35.3A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature (Min)	-55°C	-65°C	-50°C	-55°C	-55°C	-50°C
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: SMBJ8.0E3/TR13 (Microchip Technology)

The SMBJ8.0E3/TR13 is the recommended direct substitute. This part maintains identical electrical specifications: 8V reverse standoff voltage, 8.89V minimum breakdown voltage, and 15V maximum clamping voltage. The part is in active production status with extended operating temperature range (-65°C to 150°C), exceeding the original specification. ROHS3 compliance and MSL 1 rating match the original part. Inventory availability is confirmed at 962 pieces.

Secondary Substitute: SMBJ8.0A (MDD)

The SMBJ8.0A provides equivalent 8V standoff and 8.89V breakdown voltage specifications. Clamping voltage is reduced to 13.6V with increased peak pulse current (44.2A). This configuration maintains 600W power dissipation and is suitable for applications where lower clamping voltage is acceptable. Active production status and high inventory (26,100 pieces) support supply chain continuity. Operating temperature minimum is -50°C.

Tertiary Substitute: SMBJ8.0A-13-F (Diodes Incorporated)

The SMBJ8.0A-13-F offers 8V standoff voltage with 13.6V clamping voltage and 44.1A peak pulse current. This part maintains ROHS3 compliance and automotive-grade operating temperature range (-55°C to 150°C). Active production status with 4,400 pieces in inventory provides alternative sourcing. Electrical performance is equivalent to SMBJ8.0A within measurement tolerance.

Alternative Substitute: SMBJ8V0A (Fairchild Semiconductor)

The SMBJ8V0A maintains 8V standoff voltage and 13.6V clamping voltage with 44.1A peak pulse current. This part is in active production with 20,300 pieces available. Packaging is specified as Bulk rather than Tape & Reel. RoHS status is not specified in available documentation. This part is suitable when clamping voltage reduction is acceptable and bulk packaging is compatible with assembly processes.

Higher Voltage Alternative: SMBJ10A (MDD)

The SMBJ10A operates at 10V reverse standoff voltage with 11V minimum breakdown and 17V maximum clamping voltage. This part is suitable only when circuit design permits increased voltage protection thresholds. Peak pulse current is 35.3A within the 600W power envelope. This part is not a direct substitute but serves as an alternative for designs requiring higher voltage suppression.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.0E3/TR13 be used as a direct replacement for SMBJ8.0HE3/52?

A: Yes. The SMBJ8.0E3/TR13 maintains identical reverse standoff voltage (8V), breakdown voltage (8.89V), and clamping voltage (15V). Both parts are housed in DO-214AA packages with surface mount configuration. The substitute part is in active production and exceeds the original operating temperature range.

Q: What is the difference between SMBJ8.0A and SMBJ8.0A-13-F?

A: Both parts maintain 8V standoff voltage and 8.89V breakdown voltage. The primary difference is manufacturer: SMBJ8.0A is manufactured by MDD, while SMBJ8.0A-13-F is manufactured by Diodes Incorporated. Electrical specifications are equivalent: 13.6V clamping voltage and approximately 44A peak pulse current. Both are suitable substitutes for the original part.

Q: Why is SMBJ10A listed as an alternative rather than a direct substitute?

A: The SMBJ10A operates at 10V reverse standoff voltage compared to the original 8V specification. This higher voltage rating results in 17V maximum clamping voltage versus 15V for the original part. While both parts share the same package and power rating, the increased clamping voltage may affect circuit protection characteristics. Use SMBJ10A only when circuit design permits higher voltage suppression thresholds.

Q: Are all substitute parts ROHS3 compliant?

A: SMBJ8.0E3/TR13, SMBJ8.0A, SMBJ8.0A-13-F, and SMBJ10A are confirmed ROHS3 compliant. SMBJ8V0A RoHS status is not specified in available documentation. Verify RoHS compliance with the supplier before selecting SMBJ8V0A for applications requiring regulatory compliance documentation.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel packaging is standard for automated surface mount assembly processes. Components are wound on carrier tape with sprocket holes for pick-and-place equipment. Bulk packaging contains loose components suitable for manual assembly or alternative handling methods. SMBJ8V0A is supplied in Bulk packaging; all other substitutes are available in Tape & Reel format.

Q: Can I use SMBJ8.0A parts with lower clamping voltage (13.6V) instead of 15V?

A: Yes, if circuit design permits. The lower clamping voltage (13.6V versus 15V) provides tighter voltage suppression. This is acceptable in applications where the protected circuit can tolerate slightly lower transient voltage levels. Verify circuit simulation or testing confirms compatibility before production implementation.

Q: What is the operating temperature range difference between substitutes?

A: The original SMBJ8.0HE3/52 operates from -55°C to 150°C. SMBJ8.0E3/TR13 extends the minimum to -65°C. SMBJ8.0A and SMBJ10A operate from -50°C minimum. SMBJ8.0A-13-F and SMBJ8V0A match the original -55°C minimum. All parts maintain 150°C maximum. Select based on application temperature requirements.

Q: Is inventory availability a factor in substitute selection?

A: Inventory levels are provided for reference: SMBJ8.0E3/TR13 (962 pcs), SMBJ8.0A (26,100 pcs), SMBJ8.0A-13-F (4,400 pcs), SMBJ8V0A (20,300 pcs), and SMBJ10A (113,100 pcs). High inventory availability supports supply chain continuity. However, electrical compatibility and product status should be primary selection criteria. Inventory levels are subject to change and should be verified with suppliers.

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