SMB8J8.0C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMB8J8.0C-E3/5B is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with an 8V reverse standoff voltage and provides 15V maximum clamping voltage at peak pulse current. The device is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	8V
Breakdown Voltage (Min)	8.89V
Clamping Voltage (Max) @ Ipp	15V
Peak Pulse Current (10/1000µs)	53.3A
Peak Pulse Power	800W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Reverse Standoff Voltage: 8V (exact match required)
Breakdown Voltage (Min): 8.89V (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Mounting Type: Surface Mount (exact match required)
RoHS Status: ROHS3 Compliant (compliance requirement)
Moisture Sensitivity Level: 1 (Unlimited) (compatibility requirement)

Substitute parts are grouped into two categories based on clamping voltage specification:

Category A (13.6V Clamping): Parts with 13.6V maximum clamping voltage at peak pulse current. These represent the primary substitution path with active product status and full inventory availability.

Category B (15V Clamping): Parts with 15V maximum clamping voltage at peak pulse current, matching the original specification exactly.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Operating Temp (°C)	Product Status
SMB8J8.0C-E3/5B	Vishay	8	8.89	15	53.3	800	DO-214AA, SMB	-55 ~ 150	Obsolete
SMB8J8.0CA-E3/5B	Vishay	8	8.89	13.6	58.8	800	DO-214AA, SMB	-55 ~ 150	Active
SMBJ8.0CA	MDD	8	8.89	13.6	44.2	600	DO-214AA, SMB	-50 ~ 150	Active
SMBJ8.0CA-13-F	Diodes Incorporated	8	8.89	13.6	44.1	600	DO-214AA, SMB	-55 ~ 150	Active
SMBJ8.0CA-TP	Micro Commercial Co	8	8.89	13.6	44.1	600	DO-214AA, SMB	-55 ~ 175	Active
SMBJ8.0CAE3/TR13	Microchip Technology	8	8.89	13.6	44.1	600	DO-214AA, SMB	-65 ~ 150	Active
SMBJ8.0CE3/TR13	Microchip Technology	8	8.89	15	40	600	DO-214AA, SMB	-65 ~ 150	Active
SMBJ8V0CA	Taiwan Semiconductor Corporation	8	8.89	13.6	44.1	600	DO-214AA, SMB	-55 ~ 150	Active

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) certification, meeting regulatory and environmental requirements equivalent to the original SMB8J8.0C-E3/5B.

For 15V Clamping Voltage Requirement: SMBJ8.0CE3/TR13 (Microchip Technology) is the only active substitute that matches the original 15V clamping specification exactly. This part extends the operating temperature range to -65°C ~ 150°C and maintains 600W peak pulse power rating.

For 13.6V Clamping Voltage Applications: Multiple active alternatives are available across multiple manufacturers. SMB8J8.0CA-E3/5B (Vishay) provides direct manufacturer continuity with identical operating temperature range (-55°C ~ 150°C) and maintains the 800W peak pulse power rating. Alternative sources include SMBJ8.0CA (MDD), SMBJ8.0CA-13-F (Diodes Incorporated), SMBJ8.0CA-TP (Micro Commercial Co), SMBJ8.0CAE3/TR13 (Microchip Technology), and SMBJ8V0CA (Taiwan Semiconductor Corporation), all with active product status and full inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SMB8J8.0C-E3/5B be directly replaced with a 13.6V clamping part?

A: Direct replacement depends on circuit design requirements. The original part specifies 15V maximum clamping voltage. Parts with 13.6V clamping voltage will clamp transients at a lower threshold. Verify that your circuit design tolerates this lower clamping voltage before substitution.

Q: What is the difference between SMB8J8.0CA-E3/5B and SMBJ8.0CA?

A: Both parts share identical electrical parameters (8V standoff, 8.89V breakdown, 13.6V clamping). SMB8J8.0CA-E3/5B is manufactured by Vishay with 800W peak pulse power and -55°C ~ 150°C operating range. SMBJ8.0CA (MDD) provides 600W peak pulse power and operates from -50°C ~ 150°C. Select based on power dissipation requirements and temperature range compatibility.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use DO-214AA (SMB) surface-mount package with identical mechanical footprint and mounting type. PCB layout and assembly processes require no modification.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ8.0CA-TP (Micro Commercial Co) operates from -55°C ~ 175°C, providing the highest maximum junction temperature specification among all substitutes.

Q: Do all substitutes meet RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original part's regulatory status.

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