SMBJ26A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ26A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, operating in the 26V reverse standoff voltage class. This surface mount component in DO-214AA (SMB) package is designed for general-purpose transient voltage suppression 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: reverse standoff voltage (26V), breakdown voltage range (28.9V minimum), clamping voltage characteristics, peak pulse current capability, and surface mount packaging compatibility. Substitutes maintain functional equivalence within the specified operating temperature range and power dissipation envelope.

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)
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Type	Zener	-
Unidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for SMBJ26A-M3/52 are classified based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Reverse standoff voltage: 26V (exact match required)
Breakdown voltage minimum: 28.9V or higher
Clamping voltage: 41.6V to 42.3V range
Peak pulse current: 14.2A to 14.9A range
Power dissipation: 500W to 600W
Package: DO-214AA or DO-214AC (SMB or SMA variants)
Mounting: Surface mount
Type: Zener, unidirectional
Operating temperature: -55°C to 150°C minimum (or extended to -65°C)
Compliance: RoHS3, MSL 1

Grouping Logic:

Group 1 (Vishay Direct Equivalents): Identical electrical specifications, same manufacturer, packaging variants (TR, E3/5B, E3/52, M3/H)
Group 2 (Cross-Manufacturer Equivalents): Matching electrical parameters from alternative manufacturers (EVVO Semi, Littelfuse, Diodes Incorporated, STMicroelectronics, Littelfuse Inc.)
Group 3 (Near-Equivalent Variants): Slight variations in peak pulse current or clamping voltage within acceptable tolerance bands

Parameter Comparison

Manufacturer 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 / Case	Operating Temp (°C)	RoHS Status
SMBJ26A-M3/52	Vishay General Semiconductor - Diodes Division	26	28.9	42.1	14.3	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26A-E3/5B	Vishay General Semiconductor - Diodes Division	26	28.9	42.1	14.3	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26D-M3/H	Vishay General Semiconductor - Diodes Division	26	29.3	41.6	14.5	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26A-E3/52	Vishay General Semiconductor - Diodes Division	26	28.9	42.1	14.3	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26A	EVVO Semi	26	28.9	42.1	14.3	600	DO-214AC, SMA	-65 to 150	ROHS3 Compliant
SACB26	Littelfuse	26	28.9	42.3	11.1	500	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26A-13-F	Diodes Incorporated	26	28.9	42.1	14.2	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SMBJ26A-TR	STMicroelectronics	26	28.9	42.1	14.9	600	DO-214AA, SMB	-55 to 150	ROHS3 Compliant
SZ1SMB26AT3G	Littelfuse Inc.	26	28.9	42.1	14.2	600	DO-214AA, SMB	-65 to 150	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred): SMBJ26A-E3/5B and SMBJ26A-E3/52 from Vishay are direct electrical and mechanical equivalents, differing only in packaging configuration (tape & reel variants). Both maintain identical specifications and are Active status products with full RoHS3 compliance.

Tier 2 - Functionally Equivalent Cross-Manufacturer Parts: SMBJ26A-13-F (Diodes Incorporated) and SMBJ26A-TR (STMicroelectronics) provide equivalent electrical performance with matching DO-214AA SMB packaging. Both are Active status and RoHS3 compliant. SZ1SMB26AT3G (Littelfuse Inc.) offers extended temperature range (-65°C to 150°C) and automotive-grade qualification (AEC-Q101), suitable for applications requiring higher reliability standards.

Tier 3 - Near-Equivalent Alternatives: SMBJ26D-M3/H (Vishay) exhibits slightly higher breakdown voltage (29.3V) and peak pulse current (14.5A) with marginally lower clamping voltage (41.6V), remaining within functional tolerance for most applications. SACB26 (Littelfuse) operates at reduced peak pulse current (11.1A) and power dissipation (500W), suitable for lower-stress transient suppression scenarios.

Package Consideration: SMBJ26A from EVVO Semi uses DO-214AC (SMA) package instead of DO-214AA (SMB), requiring PCB layout modification. This variant extends operating temperature to -65°C.

All substitute parts maintain Active product status and RoHS3 compliance, ensuring long-term availability and regulatory conformance.

Frequently Asked Questions (FAQ)

Q: Can SMBJ26A-E3/5B replace SMBJ26A-M3/52 directly? A: Yes. Both parts are Vishay products with identical electrical specifications (26V standoff, 42.1V clamping, 14.3A peak pulse). The difference is packaging configuration (E3/5B vs. M3/52 tape & reel variants). Direct substitution is valid for equivalent circuit performance.

Q: What is the difference between SMBJ26D-M3/H and SMBJ26A-M3/52? A: SMBJ26D-M3/H has slightly higher breakdown voltage (29.3V vs. 28.9V), marginally lower clamping voltage (41.6V vs. 42.1V), and higher peak pulse current (14.5A vs. 14.3A). These variations remain within acceptable tolerance for general-purpose transient suppression. Both are Vishay products with identical operating temperature and power ratings.

Q: Is SMBJ26A from EVVO Semi compatible with the original part? A: Electrically compatible, but with package differences. EVVO's SMBJ26A uses DO-214AC (SMA) instead of DO-214AA (SMB), requiring PCB footprint modification. It offers extended temperature range (-65°C to 150°C). Electrical performance is identical.

Q: Why does SACB26 have lower peak pulse current (11.1A vs. 14.3A)? A: SACB26 is designed for lower transient stress applications with 500W peak power versus 600W. It maintains the same 26V standoff and 42.3V clamping voltage but is rated for reduced peak pulse current. Use only if circuit transient energy is within 500W envelope.

Q: Can SZ1SMB26AT3G be used in automotive applications? A: Yes. SZ1SMB26AT3G carries AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C). It is suitable for automotive-grade designs requiring higher reliability standards. Electrical specifications match the original part.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited moisture sensitivity level), meeting modern environmental and regulatory requirements.

Q: What is the primary criterion for substitution? A: The 26V reverse standoff voltage is the primary selection criterion. All substitutes maintain this specification. Secondary criteria include breakdown voltage (28.9V minimum), clamping voltage (41.6V to 42.3V), and peak pulse current (11.1A to 14.9A). Package compatibility (DO-214AA/AC, SMB/SMA) and operating temperature range must also be verified for specific applications.

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