SMBJ26C Equivalent & Substitute Parts

Part Overview

The SMBJ26C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 26V reverse standoff voltage and provides clamping at 44.21V with a peak pulse current of 14.3A. The SMBJ26C is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives with matching or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	26V
Voltage - Breakdown (Min)	27.36V
Voltage - Clamping (Max) @ Ipp	44.21V
Current - Peak Pulse (10/1000µs)	14.3A
Power - Peak Pulse	600W
Operating Temperature Range	-65°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMBJ26C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 26V (exact match required)
Voltage - Clamping (Max) @ Ipp: 42.1V or 44.21V (acceptable range for circuit protection)
Current - Peak Pulse (10/1000µs): 14.2A minimum (14.3A or higher acceptable)
Power - Peak Pulse: 600W or 800W (equal or greater acceptable)
Package / Case: DO-214AA, SMB (mechanical compatibility)
Mounting Type: Surface Mount (assembly compatibility)
Type: Zener, Bidirectional (functional equivalence)
Operating Temperature: -55°C to -65°C minimum, 150°C maximum (thermal compatibility)
RoHS Status: ROHS3 Compliant (regulatory compliance)

Substitute parts meeting these criteria are functionally equivalent and can replace the SMBJ26C in circuit applications without design modification.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Package	Product Status
SMBJ26C	Littelfuse Inc.	26V	44.21V	14.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Obsolete
SMBJ26CA	EVVO Semi	26V	42.1V	14.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active
SZ1SMB26CAT3G	Littelfuse Inc.	26V	42.1V	14.2A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active
SMB8J26CA-E3/52	Vishay General Semiconductor - Diodes Division	26V	42.1V	19A	800W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMB8J26CA-E3/5B	Vishay General Semiconductor - Diodes Division	26V	42.1V	19A	800W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ26CA-13-F	Diodes Incorporated	26V	42.1V	14.2A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ26CA-E3/52	Vishay General Semiconductor - Diodes Division	26V	42.1V	14.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ26CA-E3/5B	Vishay General Semiconductor - Diodes Division	26V	42.1V	14.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), matching the regulatory and moisture sensitivity requirements of the SMBJ26C.

For direct electrical equivalence with extended temperature range: SMBJ26CA (EVVO Semi) maintains identical electrical specifications and operating temperature range (-65°C ~ 150°C) as the original part, with active product status and high inventory availability (55,200 pcs).

For enhanced current handling: SMB8J26CA-E3/52 and SMB8J26CA-E3/5B (Vishay) provide 19A peak pulse current and 800W power dissipation, exceeding original specifications while maintaining 26V standoff voltage and 42.1V clamping. Operating temperature minimum is -55°C.

For Littelfuse continuity: SZ1SMB26CAT3G (Littelfuse Inc.) provides active product status from the original manufacturer with AEC-Q101 automotive qualification and matching electrical performance.

For Vishay TransZorb series: SMBJ26CA-E3/52 and SMBJ26CA-E3/5B offer the same clamping voltage as SMBJ26C with active status and established supply chain availability (101,200 and 3,369 pcs respectively).

Frequently Asked Questions (FAQ)

Q: Can SMBJ26CA directly replace SMBJ26C without circuit modification? A: Yes. SMBJ26CA maintains the critical 26V reverse standoff voltage, 42.1V clamping voltage, and 14.3A peak pulse current. The DO-214AA SMB package is mechanically identical. No circuit redesign is required.

Q: What is the difference between 42.1V and 44.21V clamping voltage? A: Both voltages fall within acceptable transient suppression ranges for 26V standoff applications. The 42.1V clamping in substitute parts provides equivalent overvoltage protection with slightly lower clamping voltage, which is acceptable for general-purpose TVS applications.

Q: Are SMB8J26CA variants (19A current) suitable replacements? A: Yes. SMB8J26CA-E3/52 and SMB8J26CA-E3/5B exceed the original 14.3A specification with 19A peak pulse current and 800W power dissipation. These parts provide enhanced protection margin and are backward compatible in the same package.

Q: Does operating temperature range affect substitution? A: Substitute parts with -55°C minimum operating temperature (versus -65°C for SMBJ26C) are acceptable for most applications. Verify circuit requirements if operation below -55°C is necessary.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and MSL rating of 1 (Unlimited), matching regulatory and moisture sensitivity requirements.

Q: What packaging options are available? A: Substitute parts are available in Cut Tape (CT) & Digi-Reel and Tape & Reel (TR) formats. Verify packaging requirements for your procurement and assembly process.

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