SMBJ8.5A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ8.5A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 8.5V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and RoHS3 compliant, making it suitable for modern electronic designs requiring ESD and surge protection. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA (SMB) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	8.5	V
Voltage - Breakdown (Min)	9.44	V
Voltage - Clamping (Max) @ Ipp	14.4	V
Current - Peak Pulse (10/1000µs)	41.7	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ8.5A-M3/52 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 8.5V
Voltage - Clamping (Max) @ Ipp: 14.4V (±0.1V tolerance acceptable)
Current - Peak Pulse (10/1000µs): 41.7A (±0.5A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Parts are grouped as direct substitutes when all electrical parameters fall within the specified tolerances and the package is mechanically compatible. Manufacturer variations are permitted provided the base product number (SMBJ8.5) remains consistent and compliance certifications are maintained.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Product Status
SMBJ8.5A-M3/52	Vishay General Semiconductor	8.5	9.44	14.4	41.7	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ8.5D-M3/H	Vishay General Semiconductor	8.5	9.57	14.3	42.2	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ8.5A-E3/52	Vishay General Semiconductor	8.5	9.44	14.4	41.7	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ8.5A	Taiwan Semiconductor Corporation	8.5	9.44	14.4	43	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ8.5A-13-F	Diodes Incorporated	8.5	9.44	14.4	41.7	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ8V5A	Fairchild Semiconductor	8.5	9.44	14.4	41.7	600	-55 to 150	DO-214AA (SMB)	Active
P6SMB10A	Eaton - Electronics Division	8.55	9.5	14.5	42.1	600	-55 to 150	DO-214AA (SMB)	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and comply with RoHS3 and REACH requirements, matching the compliance profile of the SMBJ8.5A-M3/52. Selection among substitutes should prioritize inventory availability and lead time requirements, as all parts meet the specified electrical and mechanical criteria.

SMBJ8.5A-E3/52 and SMBJ8.5A-13-F provide identical electrical performance to the main part number with confirmed stock availability. SMBJ8.5D-M3/H offers a marginal clamping voltage reduction (14.3V vs 14.4V) with higher peak pulse current capability (42.2A), suitable for applications where slightly lower clamping is acceptable. SMBJ8.5A from Taiwan Semiconductor Corporation provides the highest peak pulse current (43A) within the voltage class. SMBJ8V5A from Fairchild Semiconductor matches all primary electrical parameters. P6SMB10A from Eaton operates at 8.55V reverse standoff with 14.5V clamping, representing a marginal voltage class shift suitable only where the application tolerance permits the 0.05V standoff increase and 0.1V clamping increase.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.5D-M3/H replace SMBJ8.5A-M3/52 directly?

A: Yes. The SMBJ8.5D-M3/H operates at identical reverse standoff voltage (8.5V) with clamping voltage of 14.3V versus 14.4V on the main part. This 0.1V difference is within acceptable tolerance for general-purpose transient protection. Peak pulse current is slightly higher at 42.2A. Both parts use identical DO-214AA packaging and maintain the same thermal and compliance specifications.

Q: What is the difference between SMBJ8.5A from different manufacturers?

A: The SMBJ8.5A base part number is offered by multiple manufacturers including Taiwan Semiconductor Corporation, Diodes Incorporated (SMBJ8.5A-13-F), and Fairchild Semiconductor (SMBJ8V5A). All maintain the 8.5V reverse standoff and 14.4V clamping specifications. Peak pulse current varies slightly: Taiwan Semiconductor at 43A, Diodes Incorporated and Fairchild at 41.7A. All are surface mount in DO-214AA (SMB) package with identical operating temperature range and compliance certifications.

Q: Is P6SMB10A a suitable substitute?

A: P6SMB10A operates at 8.55V reverse standoff and 14.5V clamping, representing a marginal shift from the 8.5V / 14.4V specification. This part is suitable only where the application design permits the 0.05V standoff increase and 0.1V clamping increase. Peak pulse current (42.1A) and power rating (600W) remain compatible. Verify application tolerance before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and REACH compliance status matching the SMBJ8.5A-M3/52 specification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all parts, indicating no moisture sensitivity constraints for storage and handling.

Q: What packaging options are available?

A: All substitute parts use DO-214AA or SMB surface mount packaging, mechanically compatible with the main part number. Vishay parts (SMBJ8.5A-M3/52, SMBJ8.5D-M3/H, SMBJ8.5A-E3/52) are supplied in Tape & Reel (TR) format. Taiwan Semiconductor SMBJ8.5A is supplied without specified packaging format. Diodes Incorporated SMBJ8.5A-13-F and Eaton P6SMB10A are supplied in Tape & Reel. Fairchild SMBJ8V5A is supplied in Bulk format.

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