SMBJ110CA Equivalent & Substitute Parts

Part Overview

The SMBJ110CA is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 110V and provides clamping at 177V maximum, with a peak pulse current rating of 3.4A. The part is actively produced and widely stocked, with 44,300 units available in inventory. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the DO-214AA (SMB) package category.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	110V
Voltage - Breakdown (Min)	122V
Voltage - Clamping (Max) @ Ipp	177V
Current - Peak Pulse (10/1000µs)	3.4A
Power - Peak Pulse	600W
Type	Zener
Bidirectional Channels	1
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-65°C ~ 150°C (TJ)

Substitute Part Grouping Explanation

Substitute parts for the SMBJ110CA are qualified based on the following electrical and mechanical parameters:

Voltage Rating Match: Reverse standoff voltage of 110V, breakdown voltage minimum of 122V, and clamping voltage maximum of 177V
Current Rating Match: Peak pulse current of 3.4A at 10/1000µs pulse duration
Power Dissipation Match: Peak pulse power of 600W
Package Compatibility: DO-214AA (SMB) surface-mount package
Device Type: Bidirectional Zener TVS diode with single channel
Product Status: Active manufacturing status

All identified substitutes meet these core electrical specifications and are compatible with the same PCB footprint and assembly processes as the SMBJ110CA.

Parameter Comparison

Parameter	SMBJ110CA (Littelfuse)	SMBJ110CA-E3/52 (Vishay)	SMBJ110CA (Fairchild)	SMBJE110CA (Eaton)
Manufacturer	Littelfuse Inc.	Vishay General Semiconductor	Fairchild Semiconductor	Eaton - Electronics Division
Voltage - Reverse Standoff (Typ)	110V	110V	110V	110V
Voltage - Breakdown (Min)	122V	122V	122V	122V
Voltage - Clamping (Max) @ Ipp	177V	177V	177V	177V
Current - Peak Pulse (10/1000µs)	3.4A	3.4A	3.4A	3.4A
Power - Peak Pulse	600W	600W	600W	600W
Operating Temperature Range	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	RoHS Compliant
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Bulk	Tape & Reel (TR)
Inventory (Pcs)	44,300	3,825	44,300	6,664

Engineering Selection Recommendations

All identified substitute parts maintain identical electrical performance specifications for voltage suppression, current handling, and power dissipation. Selection among these equivalents should be based on the following factors:

Littelfuse SMBJ110CA: Primary reference part with extended operating temperature range (-65°C to 150°C). ROHS3 compliant. Available in high volume (44,300 units) in tape and reel packaging.

Vishay SMBJ110CA-E3/52: Direct electrical equivalent with ROHS3 compliance. Operating temperature range of -55°C to 150°C. Available in tape and reel packaging with moderate inventory (3,825 units). Suitable for applications where the -55°C minimum temperature is acceptable.

Fairchild SMBJ110CA: Electrical equivalent available in bulk packaging. High inventory availability (44,300 units). RoHS status not specified in documentation. Suitable for high-volume procurement where tape and reel packaging is not required.

Eaton SMBJE110CA: Electrical equivalent with RoHS compliance. Operating temperature range of -55°C to 150°C. Available in tape and reel packaging with moderate inventory (6,664 units). Designated for telecom applications.

All parts are actively manufactured and suitable for direct substitution in general-purpose transient voltage protection circuits.

Frequently Asked Questions (FAQ)

Q: Can SMBJ110CA-E3/52 replace SMBJ110CA in all applications?

A: Yes, the SMBJ110CA-E3/52 (Vishay) is electrically equivalent to the SMBJ110CA (Littelfuse) across all specified parameters: 110V reverse standoff, 177V clamping, and 3.4A peak pulse current. The operating temperature range differs (-55°C to 150°C versus -65°C to 150°C), so applications requiring operation below -55°C require the Littelfuse part.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the DO-214AA (SMB) surface-mount package, ensuring mechanical and electrical compatibility with the same PCB footprint and assembly process.

Q: What is the difference between tape and reel and bulk packaging?

A: Tape and reel packaging is suitable for automated pick-and-place assembly processes. Bulk packaging is used for manual assembly or when automated equipment is not available. Electrical performance is identical regardless of packaging type.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range affects suitability only for applications requiring operation outside the specified range. The Littelfuse SMBJ110CA supports -65°C to 150°C, while Vishay, Fairchild, and Eaton equivalents support -55°C to 150°C. For applications operating below -55°C, the Littelfuse part is required.

Q: Are all substitute parts RoHS compliant?

A: Littelfuse SMBJ110CA, Vishay SMBJ110CA-E3/52, and Eaton SMBJE110CA are confirmed RoHS compliant. Fairchild SMBJ110CA RoHS status is not specified in available documentation.

Q: Can these parts be used interchangeably in telecom applications?

A: Yes. All parts meet the electrical specifications for general-purpose and telecom transient voltage suppression. The Eaton SMBJE110CA is specifically designated for telecom applications, but all equivalents are suitable for this use.

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