SMBJ26CA M4G Equivalent & Substitute Parts

Part Overview

The SMBJ26CA M4G is a transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation in the DO-214AA (SMB) surface mount package. This bidirectional zener diode is designed for general-purpose transient voltage suppression applications with a 26V reverse standoff voltage and 42.1V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

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)	14.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Bidirectional Channels	1	—
Type	Zener	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMBJ26CA M4G is determined by strict equivalence across the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

Voltage - Reverse Standoff (Typ): 26V
Voltage - Breakdown (Min): 28.9V
Voltage - Clamping (Max) @ Ipp: 42.1V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Allowable Variation Parameters:

Current - Peak Pulse (10/1000µs): 14.2A to 14.9A (within standard manufacturing tolerance)
Power - Peak Pulse: 600W (standard for this package class)
Operating Temperature Range: -55°C to -65°C minimum; 150°C maximum
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: Upgrade Substitutes (direct replacements with active product status) and Similar Substitutes (functionally equivalent alternatives with minor parameter variations within acceptable engineering tolerances).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Product Status	Package
SMBJ26CA M4G	Taiwan Semiconductor Corporation	26	42.1	14.9	600	-55 to 150	Discontinued	DO-214AA, SMB
SMBJ26CA-HR	Littelfuse Inc.	26	42.1	14.3	600	-65 to 150	Active	DO-214AA, SMB
SMBJ26CA-HRA	Littelfuse Inc.	26	42.1	14.3	600	-65 to 150	Active	DO-214AA, SMB
ATV06B260JB-HF	Comchip Technology	26	42.1	14.25	600	-55 to 150	Active	DO-214AA, SMB
SMB10J26CA-TP	Micro Commercial Co	26	42.1	23.75	1000	-55 to 150	Active	DO-214AA, SMB
SMBJ26CA	EVVO Semi	26	42.1	14.3	600	-65 to 150	Active	DO-214AA, SMB
SMBJ26CA-13-F	Diodes Incorporated	26	42.1	14.2	600	-55 to 150	Active	DO-214AA, SMB
SMBJ26CA-E3/52	Vishay General Semiconductor - Diodes Division	26	42.1	14.3	600	-55 to 150	Active	DO-214AA, SMB
SMBJ26CA-E3/5B	Vishay General Semiconductor - Diodes Division	26	42.1	14.3	600	-55 to 150	Active	DO-214AA, SMB
SMBJ26CA-M3/52	Vishay General Semiconductor - Diodes Division	26	42.1	14.3	600	-55 to 150	Active	DO-214AA, SMB
SMBJ26CA-M3/5B	Vishay General Semiconductor - Diodes Division	26	42.1	14.3	600	-55 to 150	Active	DO-214AA, SMB

Engineering Selection Recommendations

Upgrade Substitutes (Recommended for New Designs):

The SMBJ26CA-HR and SMBJ26CA-HRA from Littelfuse Inc. are the primary upgrade substitutes. Both parts are active products with extended operating temperature range (-65°C to 150°C versus -55°C to 150°C), providing superior thermal performance. Peak pulse current is 14.3A, within acceptable tolerance of the original 14.9A specification. Both are ROHS3 compliant with MSL 1 rating.

Active Substitute Options:

SMBJ26CA from EVVO Semi offers high inventory availability (55,200 pcs) with identical electrical specifications and extended temperature range (-65°C to 150°C). SMBJ26CA-E3/52 and SMBJ26CA-E3/5B from Vishay General Semiconductor (TransZorb® series) provide active product status with large inventory reserves (101,200 pcs and 3,369 pcs respectively) and ROHS3 compliance.

Specialized Alternatives:

ATV06B260JB-HF from Comchip Technology is an automotive-grade option (AEC-Q101 qualified) suitable for applications requiring automotive qualification. SMB10J26CA-TP from Micro Commercial Co provides enhanced power dissipation (1000W versus 600W) and higher peak pulse current (23.75A) for applications requiring increased transient energy absorption.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected across all alternatives. Selection should prioritize active product status and inventory availability for supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SMBJ26CA-HR or SMBJ26CA-HRA be used as direct replacements for SMBJ26CA M4G?

A: Yes. Both Littelfuse parts maintain identical voltage specifications (26V reverse standoff, 42.1V clamping) and package format (DO-214AA, SMB). Peak pulse current is 14.3A compared to 14.9A in the original, which is within standard manufacturing tolerance for this device class. Extended operating temperature range (-65°C to 150°C) provides additional thermal margin.

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

A: Both parts are functionally equivalent with identical electrical specifications and operating temperature range. The difference is in packaging designation: SMBJ26CA-HR and SMBJ26CA-HRA are both supplied in Tape & Reel format. Selection between them depends on supplier availability and internal part numbering conventions.

Q: Is SMB10J26CA-TP a suitable substitute despite higher peak pulse current and power rating?

A: SMB10J26CA-TP is functionally compatible for applications where the original SMBJ26CA M4G is used. The higher peak pulse current (23.75A) and power dissipation (1000W) represent enhanced capability rather than incompatibility. This part is suitable for designs requiring greater transient energy absorption. Voltage specifications remain identical (26V standoff, 42.1V clamping).

Q: Are Vishay TransZorb® SMBJ26CA variants (E3/52, E3/5B, M3/52, M3/5B) interchangeable?

A: Yes. All Vishay variants listed maintain identical electrical specifications (26V standoff, 42.1V clamping, 14.3A peak pulse current, 600W power dissipation). Differences are in packaging codes and internal manufacturing processes. Selection depends on supplier availability and design documentation requirements.

Q: Does ATV06B260JB-HF automotive qualification affect general-purpose applications?

A: No. ATV06B260JB-HF meets automotive-grade specifications (AEC-Q101) while maintaining identical electrical performance for general-purpose transient suppression. Automotive qualification represents additional quality assurance and is not detrimental to non-automotive applications.

Q: What packaging options are available for these substitutes?

A: All listed substitutes use DO-214AA (SMB) surface mount package. Packaging formats vary: Littelfuse parts are supplied in Tape & Reel (TR); Vishay parts are supplied in Tape & Reel (TR); EVVO Semi offers Cut Tape (CT) and Digi-Reel®; Diodes Incorporated supplies Tape & Reel (TR); Comchip Technology supplies Tape & Reel (TR); Micro Commercial Co supplies Bulk format. Package selection depends on production volume and assembly requirements.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance. Moisture sensitivity level is MSL 1 (Unlimited) across all alternatives, matching the original specification.

Q: Which substitute offers the best inventory availability?

A: SMBJ26CA-E3/52 from Vishay General Semiconductor has the highest inventory (101,200 pcs), followed by SMBJ26CA from EVVO Semi (55,200 pcs). Both are active products with extended lead time security.

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