1SMB26CAT3G Equivalent & Substitute Parts

Part Overview

The 1SMB26CAT3G is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, though it remains in stock with 1648 units available. The part operates as a unidirectional Zener-type TVS diode for general-purpose transient voltage suppression applications. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and long-term supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	1SMB26CAT3G
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
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
Type	Zener
Bidirectional Channels	1
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 1SMB26CAT3G 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 to 14.3A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Type: Zener
Bidirectional Channels: 1
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these electrical specifications within the allowed tolerances. Packaging remains consistent as DO-214AA (SMB) surface mount. All substitutes are ROHS3 compliant and carry MSL rating of 1. The primary distinction among substitutes is manufacturer identity and product status (active vs. obsolete).

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	Package / Case	Operating Temperature	Product Status
1SMB26CAT3G	Littelfuse Inc.	26V	28.9V	42.1V	14.2A	600W	DO-214AA, SMB	-65°C ~ 150°C	Obsolete
SMBJ26CA	EVVO Semi	26V	28.9V	42.1V	14.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ26CA-HR	Littelfuse Inc.	26V	28.9V	42.1V	14.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ26CA-HRA	Littelfuse Inc.	26V	28.9V	42.1V	14.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
TV06B260JB-G	Comchip Technology	26V	28.9V	42.1V	14.25A	600W	DO-214AA, SMB	Not specified	Active
SMBJ26CA-13-F	Diodes Incorporated	26V	28.9V	42.1V	14.2A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ26CA-M3/52	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	14.3A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ26CA-M3/5B	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	14.3A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ26CA-TP	Micro Commercial Co	26V	28.9V	42.1V	14.2A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active

Engineering Selection Recommendations

All listed substitute parts meet the electrical and mechanical specifications of the 1SMB26CAT3G. Selection should prioritize parts with active product status to ensure long-term availability and supply chain stability.

Primary Recommendation: SMBJ26CA (EVVO Semi) or SMBJ26CA-HR (Littelfuse Inc.) are preferred substitutes. Both maintain identical electrical parameters, ROHS3 compliance, and MSL rating of 1. SMBJ26CA-HR offers the advantage of Littelfuse manufacturing continuity, while SMBJ26CA provides higher inventory availability (55,200 units).

Alternative Options: SMBJ26CA-13-F (Diodes Incorporated), SMBJ26CA-M3/52 and SMBJ26CA-M3/5B (Vishay), and SMBJ26CA-TP (Micro Commercial Co) are all active alternatives with matching core specifications. SMBJ26CA-TP extends the upper operating temperature to 175°C, suitable for higher-temperature applications.

Inventory Consideration: TV06B260JB-G (Comchip Technology) offers the highest inventory level (12,644 units) among active substitutes, though operating temperature range is not specified.

All substitutes carry ROHS3 compliance and MSL rating of 1 (Unlimited), matching the original part's environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 1SMB26CAT3G with any of the listed substitutes?

A: Yes, all listed substitutes maintain the critical electrical parameters: 26V reverse standoff voltage, 28.9V minimum breakdown voltage, 42.1V maximum clamping voltage, and 600W peak pulse power. All are packaged in DO-214AA (SMB) surface mount format and are ROHS3 compliant with MSL rating of 1.

Q: What is the difference between SMBJ26CA-HR and SMBJ26CA-HRA?

A: Both are manufactured by Littelfuse Inc. and maintain identical electrical specifications. The difference lies in the series designation (SMBJ-HR vs. SMBJ-HRA) and inventory levels (659 units vs. 1,146 units). Electrically, they are equivalent for the 1SMB26CAT3G application.

Q: Does operating temperature range affect substitution?

A: The 1SMB26CAT3G operates from -65°C to 150°C. Most active substitutes operate from -55°C to 150°C, which is acceptable for most applications. SMBJ26CA-TP extends to 175°C for higher-temperature environments. Verify your application's temperature requirements before selection.

Q: Are all substitutes available in the same packaging?

A: Yes, all substitutes use DO-214AA (SMB) surface mount packaging, matching the original 1SMB26CAT3G. Packaging options vary by manufacturer (Tape & Reel or Cut Tape & Digi-Reel), but the component footprint and pinout remain identical.

Q: Why is the 1SMB26CAT3G obsolete?

A: The original part is classified as obsolete by Littelfuse Inc., though inventory remains available. Active alternatives from multiple manufacturers ensure design continuity and supply chain reliability for new applications.

Q: Which substitute offers the best inventory availability?

A: SMBJ26CA (EVVO Semi) provides the highest inventory with 55,200 units in stock, followed by TV06B260JB-G (Comchip Technology) with 12,644 units. Both are active products suitable for immediate procurement.

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