SMBJ26A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ26A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 26V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and ROHS3 compliant. 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)	26	V
Voltage - Breakdown (Min)	28.9	V
Voltage - Clamping (Max) @ Ipp	42.1	V
Current - Peak Pulse (10/1000µs)	14.3	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 SMBJ26A-M3/5B are classified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 26V
Voltage - Breakdown (Min): 28.9V minimum
Voltage - Clamping (Max) @ Ipp: 42.1V ±0.2V tolerance
Current - Peak Pulse (10/1000µs): 14.2A to 14.9A
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
Operating Temperature: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant

Parts meeting these criteria are electrically and mechanically interchangeable. Variations in peak pulse current within the specified range (14.2A to 14.9A) are acceptable as they fall within the transient protection performance envelope. Packaging variants (Tape & Reel vs. Cut Tape) do not affect electrical substitutability.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) @ Ipp V	Ipp (10/1000µs) A	Ppk W	Tj (°C)	Package	RoHS
SMBJ26A-M3/5B	Vishay	26	28.9	42.1	14.3	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26A-E3/52	Vishay	26	28.9	42.1	14.3	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26D-M3/I	Vishay	26	29.3	41.6	14.5	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26A-E3/5B	Vishay	26	28.9	42.1	14.3	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26A	EVVO Semi	26	28.9	42.1	14.3	600	-65 to 150	DO-214AC, SMA	ROHS3
SACB26	Littelfuse	26	28.9	42.3	11.1	500	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26A-13-F	Diodes Incorporated	26	28.9	42.1	14.2	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ26A-TR	STMicroelectronics	26	28.9	42.1	14.9	600	-55 to 150	DO-214AA, SMB	ROHS3
SZ1SMB26AT3G	Littelfuse Inc.	26	28.9	42.1	14.2	600	-65 to 150	DO-214AA, SMB	ROHS3

Engineering Selection Recommendations

Full Electrical Equivalents (Direct Substitution): SMBJ26A-E3/52, SMBJ26A-E3/5B, SMBJ26A-13-F, SMBJ26A-TR, and SZ1SMB26AT3G meet all primary electrical parameters with peak pulse current variation within 14.2A to 14.9A. All are Active status, ROHS3 compliant, and suitable for direct replacement in DO-214AA (SMB) package footprints.

Acceptable Substitutes with Minor Parameter Variance: SMBJ26D-M3/I exhibits slightly higher breakdown voltage (29.3V vs. 28.9V) and lower clamping voltage (41.6V vs. 42.1V), with marginally higher peak pulse current (14.5A). These variations remain within acceptable transient suppression performance for the 26V class.

SACB26 (Littelfuse) operates at reduced peak pulse current (11.1A vs. 14.3A) and lower peak power (500W vs. 600W). This part is suitable only for applications with lower transient energy requirements.

Package Compatibility Note: SMBJ26A from EVVO Semi uses DO-214AC (SMA) package, which differs mechanically from the DO-214AA (SMB) package of the primary part. PCB footprint verification is required before substitution.

Compliance Status: All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can SMBJ26A-E3/52 replace SMBJ26A-M3/5B directly? A: Yes. Both parts share identical electrical specifications (26V Vwm, 28.9V Vbr, 42.1V Vc, 14.3A Ipp, 600W Ppk) and DO-214AA (SMB) package. The difference is packaging format (Tape & Reel variant). Electrical performance is equivalent.

Q: What is the difference between SMBJ26D-M3/I and SMBJ26A-M3/5B? A: SMBJ26D-M3/I has slightly higher breakdown voltage (29.3V vs. 28.9V) and lower clamping voltage (41.6V vs. 42.1V), with marginally higher peak pulse current (14.5A vs. 14.3A). Both operate at 26V reverse standoff and 600W peak power. The part is acceptable for 26V class protection but exhibits different transient response characteristics.

Q: Is SACB26 a suitable replacement? A: SACB26 maintains the 26V reverse standoff and 42.3V clamping voltage but operates at reduced peak pulse current (11.1A vs. 14.3A) and lower peak power (500W vs. 600W). Substitution is valid only for applications with lower transient energy requirements. Verify circuit transient specifications before use.

Q: Can I use SMBJ26A from EVVO Semi as a substitute? A: SMBJ26A from EVVO Semi matches electrical specifications but uses DO-214AC (SMA) package instead of DO-214AA (SMB). PCB footprint compatibility must be confirmed. SMA and SMB packages have different land patterns and are not mechanically interchangeable on standard SMB footprints.

Q: What does the temperature range difference mean (EVVO Semi: -65°C to 150°C vs. Vishay: -55°C to 150°C)? A: EVVO Semi's extended lower temperature rating (-65°C vs. -55°C) provides additional margin for cold environment operation. Both parts meet the -55°C to 150°C range of the primary part. The extended range does not affect substitutability for standard applications.

Q: Is SZ1SMB26AT3G automotive-qualified? A: Yes. SZ1SMB26AT3G carries AEC-Q101 automotive qualification and is rated for -65°C to 150°C operation. It is suitable for automotive and industrial applications requiring higher reliability standards.

Q: What is the significance of the capacitance specification (630pF @ 1MHz) listed for SZ1SMB26AT3G? A: Capacitance at 1MHz is provided for high-frequency circuit analysis. For standard transient suppression applications, this parameter does not affect substitutability. Verify capacitance requirements if the circuit operates at frequencies where parasitic capacitance is critical.

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