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

Part Overview

The SMBJ8.5A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant. Substitute parts are identified when electrical and mechanical parameters align within the specified tolerances for this TVS diode category, enabling component interchangeability in circuit designs.

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

Substitute parts for the SMBJ8.5A-M3/5B are qualified based on the following electrical and mechanical parameters:

Critical Parameters for Substitution:

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

Parts meeting these specifications are classified as direct substitutes. Minor variations in peak pulse current (within ±5%) and clamping voltage (within ±1%) are acceptable for TVS diode applications.

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)	Package	Operating Temp (°C)	Status
SMBJ8.5A-M3/5B	Vishay General Semiconductor	8.5	9.44	14.4	41.7	600	DO-214AA, SMB	-55 to 150	Active
SMBJ8.5A-E3/52	Vishay General Semiconductor	8.5	9.44	14.4	41.7	600	DO-214AA, SMB	-55 to 150	Active
SMBJ8.5A	Taiwan Semiconductor Corporation	8.5	9.44	14.4	43	600	DO-214AA, SMB	-55 to 150	Active
SMBJ8.5A-13-F	Diodes Incorporated	8.5	9.44	14.4	41.7	600	DO-214AA, SMB	-55 to 150	Active
SMBJ8V5A	Fairchild Semiconductor	8.5	9.44	14.4	41.7	600	DO-214AA, SMB	-55 to 150	Active
P6SMB10A	Eaton - Electronics Division	8.55	9.5	14.5	42.1	600	DO-214AA, SMB	-55 to 150	Active

Engineering Selection Recommendations

All substitute parts listed are Active status components with RoHS3 compliance or RoHS compliance certification. Selection among qualified substitutes should be based on:

Inventory Availability: SMBJ8.5A (Taiwan Semiconductor Corporation) offers the highest inventory level at 44,300 pieces. SMBJ8.5A-E3/52 (Vishay) provides 1,950 pieces. SMBJ8V5A (Fairchild) provides 35,100 pieces. SMBJ8.5A-13-F (Diodes Incorporated) provides 4,300 pieces. P6SMB10A (Eaton) provides 9,100 pieces.

Packaging Specification: SMBJ8.5A-M3/5B and SMBJ8.5A-E3/52 are specified as Tape & Reel (TR). SMBJ8.5A-13-F is specified as Tape & Reel (TR). SMBJ8V5A is specified as Bulk. SMBJ8.5A (Taiwan Semiconductor) has no packaging specification provided. P6SMB10A is specified as Tape & Reel (TR).

Electrical Performance: SMBJ8.5A (Taiwan Semiconductor) exhibits 43A peak pulse current, which is 3% higher than the 41.7A specification. P6SMB10A exhibits 8.55V reverse standoff voltage and 14.5V clamping voltage, representing minor deviations within acceptable TVS diode tolerances.

Compliance: All parts meet RoHS requirements and operate across the -55°C to 150°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.5A from Taiwan Semiconductor Corporation replace SMBJ8.5A-M3/5B?

A: Yes. The Taiwan Semiconductor SMBJ8.5A meets all critical electrical parameters with 43A peak pulse current versus 41.7A, representing a 3% increase within acceptable TVS diode performance margins. Package and operating temperature specifications are identical.

Q: What is the difference between SMBJ8.5A-M3/5B and SMBJ8.5A-E3/52?

A: Both are manufactured by Vishay General Semiconductor and share identical electrical specifications. The suffix designations (-M3/5B and -E3/52) indicate different packaging or tape configurations. Both are qualified substitutes with equivalent performance.

Q: Is P6SMB10A a suitable substitute?

A: P6SMB10A is a qualified substitute with minor parameter variations. Reverse standoff voltage is 8.55V (0.05V higher), breakdown voltage is 9.5V (0.06V higher), clamping voltage is 14.5V (0.1V higher), and peak pulse current is 42.1A (0.4A higher). These variations fall within standard TVS diode manufacturing tolerances and do not affect functional compatibility in general-purpose transient suppression applications.

Q: Does packaging type affect substitution eligibility?

A: All qualified substitutes use DO-214AA or SMB package designations suitable for surface mount assembly. Tape & Reel (TR) packaging is standard for automated assembly processes. Bulk packaging (SMBJ8V5A) is compatible for manual or alternative assembly methods. Package selection should align with manufacturing process requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. SMBJ8.5A-M3/5B, SMBJ8.5A-E3/52, SMBJ8.5A, SMBJ8.5A-13-F, and SMBJ8V5A are RoHS3 compliant. P6SMB10A is RoHS compliant. All parts meet environmental regulatory requirements.

Q: What is the operating temperature range for these TVS diodes?

A: All qualified substitutes operate across -55°C to 150°C junction temperature (TJ), matching the SMBJ8.5A-M3/5B specification.

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