SMBJ5.0 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ5.0 is a unidirectional Zener transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 5V reverse standoff voltage with a 9.66V maximum clamping voltage at peak pulse current of 65.3A, housed in a DO-214AA (SMB) package. The SMBJ5.0 is classified as obsolete, necessitating identification of active equivalent parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5	V
Voltage - Breakdown (Min)	6.03	V
Voltage - Clamping (Max) @ Ipp	9.66	V
Current - Peak Pulse (10/1000µs)	65.3	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 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

Substitution of the SMBJ5.0 is determined by the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff: 5V (exact match required)
Voltage - Clamping (Max) @ Ipp: 9.2V to 9.66V (acceptable range for functional equivalence)
Current - Peak Pulse (10/1000µs): 65.2A to 108.7A (equal or greater capacity acceptable)
Power - Peak Pulse: 600W to 1000W (equal or greater capacity acceptable)
Package / Case: DO-214AA, SMB (mechanical compatibility required)
Mounting Type: Surface Mount (required)
Operating Temperature Range: -55°C to -65°C minimum; 150°C maximum (must encompass or match original range)
RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitute parts are grouped into two categories: direct electrical equivalents (matching 65.3A peak pulse current) and higher-rated alternatives (108.7A peak pulse current with enhanced power dissipation).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package	Product Status
SMBJ5.0	Littelfuse Inc.	5	9.66	65.3	600	-65 to 150	DO-214AA, SMB	Obsolete
SMBJ5.0A	EVVO Semi	5	9.2	65.3	600	-65 to 150	DO-214AA, SMB	Active
SZ1SMB5.0AT3G	Littelfuse Inc.	5	9.2	65.2	600	-65 to 150	DO-214AA, SMB	Active
SMB10J5.0A-E3/52	Vishay General Semiconductor - Diodes Division	5	9.2	108.7	1000	-55 to 150	DO-214AA, SMB	Active
SMB10J5.0A-E3/5B	Vishay General Semiconductor - Diodes Division	5	9.2	108.7	1000	-55 to 150	DO-214AA, SMB	Active
SMBJ5.0A-13-F	Diodes Incorporated	5	9.2	65.2	600	-55 to 150	DO-214AA, SMB	Active
SMBJ5.0A-E3/5B	Vishay General Semiconductor - Diodes Division	5	9.2	65.2	600	-55 to 150	DO-214AA, SMB	Active
SMBJ5.0A-TR	STMicroelectronics	5	9.2	68	600	-55 to 150	DO-214AA, SMB	Active
SMBJ5V0A	Fairchild Semiconductor	5	9.2	65.2	600	-55 to 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance, ensuring regulatory alignment for current manufacturing standards. Selection between equivalent options depends on application-specific requirements:

For designs requiring exact temperature range coverage (-65°C minimum), SMBJ5.0A (EVVO Semi) and SZ1SMB5.0AT3G (Littelfuse Inc.) maintain the original -65°C to 150°C operating window. SZ1SMB5.0AT3G additionally carries AEC-Q101 automotive qualification, suitable for automotive-grade applications.

For general-purpose applications where the -55°C to 150°C range is acceptable, SMBJ5.0A-13-F (Diodes Incorporated), SMBJ5.0A-E3/5B (Vishay), SMBJ5.0A-TR (STMicroelectronics), and SMBJ5V0A (Fairchild Semiconductor) provide direct electrical equivalence with 65.2A to 68A peak pulse current ratings.

For applications requiring enhanced transient protection margin, SMB10J5.0A-E3/52 and SMB10J5.0A-E3/5B (Vishay) offer 108.7A peak pulse current and 1000W power dissipation, providing superior overvoltage suppression capability within the same DO-214AA package footprint.

Frequently Asked Questions (FAQ)

Q: Can SMBJ5.0 be directly replaced with SMBJ5.0A?

A: Yes. SMBJ5.0A (EVVO Semi) maintains identical reverse standoff voltage (5V), equivalent clamping voltage (9.2V vs. 9.66V), matching peak pulse current (65.3A), and identical operating temperature range (-65°C to 150°C). Both use DO-214AA (SMB) surface-mount packaging.

Q: What is the difference between 65.3A and 108.7A rated parts?

A: Peak pulse current rating indicates the maximum transient current the device can suppress. SMB10J5.0A variants (108.7A) provide higher transient suppression capacity and 1000W power dissipation versus 600W for 65.3A-rated parts. Both maintain 5V reverse standoff and 9.2V clamping voltage. Selection depends on circuit transient severity.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range must encompass the original specification or match it. SMBJ5.0 operates -65°C to 150°C. Substitutes with -55°C to 150°C range are acceptable for applications not requiring -65°C minimum operation. For full temperature coverage, select SMBJ5.0A (EVVO Semi) or SZ1SMB5.0AT3G (Littelfuse Inc.).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, meeting current environmental and regulatory requirements for electronic component manufacturing.

Q: Can SMB10J5.0A parts be used as drop-in replacements?

A: Yes, mechanically and electrically. SMB10J5.0A-E3/52 and SMB10J5.0A-E3/5B use identical DO-214AA (SMB) packaging and maintain 5V reverse standoff voltage. Higher peak pulse current (108.7A) and power rating (1000W) provide enhanced protection without circuit modification. Operating temperature range is -55°C to 150°C.

Q: What packaging options are available for these substitutes?

A: All substitute parts are available in surface-mount DO-214AA (SMB) package. Packaging formats include Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) options, depending on manufacturer and part number variant.

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