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SMBJ26A-E3/51 Equivalent & Substitute Parts
Part Overview
The SMBJ26A-E3/51 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component in DO-214AA (SMB) package is designed for general-purpose transient voltage suppression applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 26V |
| Voltage - Breakdown (Min) | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 42.1V |
| Current - Peak Pulse (10/1000µs) | 14.3A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C ~ 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
Substitution for the SMBJ26A-E3/51 is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff: 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Current - Peak Pulse (10/1000µs): 14.3A
- Power - Peak Pulse: 600W
- Type: Zener, Unidirectional
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Substitute parts are grouped into two categories:
Category 1: Vishay TransZorb® Series (Active Status) Parts SMBJ26A-E3/52, SMBJ26A-E3/5B, SMBJ26A-M3/52, and SMBJ26A-M3/5B maintain identical electrical specifications and package configuration. These differ only in packaging format (Tape & Reel variants) and are direct functional replacements.
Category 2: Alternative Manufacturers (Active Status) SMBJ26A from EVVO Semi and Littelfuse Inc. variants (SMBJ26A-HR, SMBJ26A-HRA) provide equivalent electrical performance with identical package specifications. Operating temperature ranges vary slightly (-65°C ~ 150°C for EVVO and Littelfuse versus -55°C ~ 150°C for the original), providing extended low-temperature capability.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SMBJ26A-E3/51 | Vishay | Obsolete | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A-E3/52 | Vishay | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A-E3/5B | Vishay | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A-M3/52 | Vishay | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A-M3/5B | Vishay | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A | EVVO Semi | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AC, SMA | ROHS3 Compliant |
| SMBJ26A-HR | Littelfuse Inc. | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
| SMBJ26A-HRA | Littelfuse Inc. | Active | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AA, SMB | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: Vishay TransZorb® Series (Active) SMBJ26A-E3/52, SMBJ26A-E3/5B, SMBJ26A-M3/52, and SMBJ26A-M3/5B are direct functional equivalents from the original manufacturer. All maintain identical electrical specifications, operating temperature range, and package configuration. These parts carry Active product status and full ROHS3 compliance, ensuring long-term availability and supply chain stability.
Secondary Recommendation: Littelfuse SMBJ26A-HR / SMBJ26A-HRA These parts provide equivalent electrical performance with extended operating temperature range (-65°C ~ 150°C). Both are Active products with ROHS3 compliance and DO-214AA (SMB) package compatibility. The Littelfuse SMBJ-HR and SMBJ-HRA series are suitable for applications requiring enhanced low-temperature performance.
Alternative: EVVO Semi SMBJ26A EVVO Semi SMBJ26A offers equivalent electrical specifications with extended temperature range (-65°C ~ 150°C). Note that this variant uses DO-214AC (SMA) package designation, which differs from the original DO-214AA (SMB) package. Physical compatibility must be verified for PCB layout and thermal management considerations.
Frequently Asked Questions (FAQ)
Q: Can I use SMBJ26A-E3/52 as a direct replacement for SMBJ26A-E3/51? A: Yes. Both parts share identical electrical specifications (26V standoff, 28.9V breakdown, 42.1V clamping, 14.3A peak pulse, 600W peak power), operating temperature range (-55°C ~ 150°C), and DO-214AA (SMB) package configuration. The difference is packaging format (Tape & Reel for -E3/52 versus the original -E3/51). Electrical and mechanical compatibility is complete.
Q: What is the difference between Vishay SMBJ26A-E3/5B and SMBJ26A-M3/5B? A: Both parts are electrically and mechanically identical. The designation difference (E3 versus M3) reflects different tape and reel specifications for automated assembly. For circuit functionality, they are interchangeable.
Q: Can I substitute the EVVO Semi SMBJ26A for the original Vishay part? A: Electrical specifications are identical. However, the EVVO part uses DO-214AC (SMA) package designation versus the original DO-214AA (SMB). Physical footprint compatibility must be verified. The extended operating temperature range (-65°C ~ 150°C) provides additional capability for low-temperature environments.
Q: Why do Littelfuse parts have a wider operating temperature range? A: Littelfuse SMBJ26A-HR and SMBJ26A-HRA specify -65°C ~ 150°C versus the original -55°C ~ 150°C. This extended low-temperature specification provides additional design margin for applications in cold environments. Electrical performance at the original temperature range remains equivalent.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status, matching the original SMBJ26A-E3/51 compliance level.
Q: What is the inventory status of these substitute parts? A: Vishay TransZorb® variants (SMBJ26A-E3/52, SMBJ26A-E3/5B, SMBJ26A-M3/52, SMBJ26A-M3/5B) are Active products with confirmed inventory availability. EVVO Semi SMBJ26A and Littelfuse variants (SMBJ26A-HR, SMBJ26A-HRA) are also Active with available stock, providing multiple sourcing options.
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