Request Quote
(Ships tomorrow)
1SMB26CAT3 Equivalent & Substitute Parts
Part Overview
The 1SMB26CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface mount applications. This component features a 26V reverse standoff voltage with a 42.1V maximum clamping voltage and 14.2A peak pulse current capability in the DO-214AA (SMB) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1SMB26CAT3 |
| Manufacturer | onsemi |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Package / Case | DO-214AA, SMB |
| Voltage - Reverse Standoff (Typ) | 26V |
| Voltage - Breakdown (Min) | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 42.1V |
| Current - Peak Pulse (10/1000µs) | 14.2A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -65°C ~ 150°C (TJ) |
| Bidirectional Channels | 1 |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution of the 1SMB26CAT3 is determined by strict electrical and mechanical parameter matching:
Critical Matching Parameters:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Current - Peak Pulse (10/1000µs): 14.2A minimum
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Bidirectional Channels: 1
- Type: Zener
All substitute parts listed maintain these electrical specifications within the defined tolerances. Substitute parts are classified as either direct equivalents (identical part numbers from different manufacturers) or similar alternatives (same electrical performance with minor packaging or temperature range variations).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1SMB26CAT3 | onsemi | 26V | 28.9V | 42.1V | 14.2A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Obsolete | RoHS non-compliant |
| SMBJ26CA | EVVO Semi | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| P6SMBJ26CA-AU_R1_000A1 | Panjit International Inc. | 26V | 28.9V | 42.1V | 14.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-13-F | Diodes Incorporated | 26V | 28.9V | 42.1V | 14.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-HR | Littelfuse Inc. | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-HRA | Littelfuse Inc. | 26V | 28.9V | 42.1V | 14.3A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-M3/52 | Vishay General Semiconductor - Diodes Division | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-M3/5B | Vishay General Semiconductor - Diodes Division | 26V | 28.9V | 42.1V | 14.3A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Active | ROHS3 Compliant |
| SMBJ26CA-TP | Micro Commercial Co | 26V | 28.9V | 42.1V | 14.2A | 600W | -55°C ~ 175°C | DO-214AA, SMB | Active | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain electrical equivalence to the 1SMB26CAT3 within the specified parameters. Selection should be based on the following criteria:
Product Status: The 1SMB26CAT3 is obsolete. All substitute parts listed are active products with ongoing manufacturer support and availability.
Compliance Requirements: The original 1SMB26CAT3 is RoHS non-compliant. All substitute parts are ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.
Temperature Range Considerations: The 1SMB26CAT3 operates from -65°C to 150°C. Most substitute parts operate from -55°C to 150°C, which is suitable for general-purpose applications. The SMBJ26CA-TP variant extends to 175°C maximum junction temperature for higher-temperature environments.
Automotive Grade: The P6SMBJ26CA-AU_R1_000A1 from Panjit International Inc. carries AEC-Q101 automotive qualification and is suitable for automotive applications requiring additional reliability assurance.
Peak Pulse Current: Substitute parts from EVVO Semi, Littelfuse, Vishay, and Panjit provide 14.3A peak pulse current, which exceeds the original 14.2A specification. Micro Commercial Co and Diodes Incorporated maintain the 14.2A specification.
Frequently Asked Questions (FAQ)
Q: Can I directly replace 1SMB26CAT3 with any of the listed substitute parts?
A: Yes, all listed substitute parts maintain the critical electrical parameters: 26V reverse standoff voltage, 28.9V minimum breakdown voltage, 42.1V maximum clamping voltage, and 600W peak pulse power. The DO-214AA (SMB) package is identical across all parts, ensuring mechanical compatibility.
Q: What is the difference between direct equivalents and similar alternatives?
A: Direct equivalents (such as SMBJ26CA from EVVO Semi) use the same base part number designation and are functionally identical. Similar alternatives (such as SMBJ26CA-HR from Littelfuse or SMBJ26CA-M3/5B from Vishay) use different manufacturer-specific suffixes but maintain identical electrical specifications and package form factors.
Q: Does the higher peak pulse current in some substitute parts affect compatibility?
A: No. Substitute parts with 14.3A peak pulse current (EVVO Semi, Littelfuse, Vishay) exceed the original 14.2A specification. This provides additional margin and does not compromise circuit compatibility. The clamping voltage and reverse standoff voltage remain identical.
Q: Are there temperature range limitations I should consider?
A: The original 1SMB26CAT3 operates from -65°C to 150°C. Most substitute parts operate from -55°C to 150°C, which is acceptable for standard industrial and commercial applications. If your design requires operation below -55°C, select SMBJ26CA-HR or SMBJ26CA-HRA from Littelfuse, which maintain the -65°C lower limit.
Q: Which substitute part should I select for automotive applications?
A: The P6SMBJ26CA-AU_R1_000A1 from Panjit International Inc. is qualified to AEC-Q101 automotive standards and is the appropriate choice for automotive circuit protection applications.
Q: Is RoHS compliance important for my application?
A: All substitute parts are ROHS3 compliant, meeting current environmental regulations. If your design or supply chain requires RoHS compliance, any of the listed substitute parts will satisfy this requirement. The original 1SMB26CAT3 is RoHS non-compliant and should not be used in new designs requiring regulatory compliance.
Q: Can I mix different substitute parts in the same design?
A: Yes. All substitute parts maintain identical electrical specifications for the critical parameters that determine TVS diode function: reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse power. Mixing parts from different manufacturers is electrically compatible.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts