SMBJ110C Equivalent & Substitute Parts

Part Overview

The SMBJ110C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 110V reverse standoff voltage with a 185.85V maximum clamping voltage and 3.4A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

SMBJ110C

Littelfuse Inc.In Stock: 789SMBJ110C Datasheet

Current PartRFQ

SMBJ110CA

Fairchild SemiconductorIn Stock: 44388SMBJ110CA Datasheet

DirectRFQ

SMBJ110CA

Fairchild SemiconductorIn Stock: 44388SMBJ110CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ110C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse standoff voltage: 110V (Typ)
• Peak pulse current capability: 3.4A
• Peak pulse power rating: 600W
• Package type: DO-214AA (SMB) surface mount
• Bidirectional channels: 1
• Zener diode type classification

Acceptable Variation Range:

• Voltage - Breakdown (Min): Must accommodate the 115.65V minimum specification
• Voltage - Clamping (Max) @ Ipp: Variation permitted within the functional operating window of the protected circuit
• Operating temperature range: Must support the application's thermal requirements

The SMBJ110CA from Fairchild Semiconductor meets all critical electrical and mechanical parameters, maintaining identical reverse standoff voltage, peak pulse current, power rating, and package configuration. Clamping voltage variation (177V vs. 185.85V) remains within acceptable operational margins for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ110CA (Fairchild Semiconductor) is the direct substitute for the obsolete SMBJ110C. Both components share identical reverse standoff voltage (110V), peak pulse current (3.4A), and power dissipation (600W) specifications. The SMBJ110CA maintains active product status, ensuring ongoing availability and supply chain continuity.

The primary electrical difference is the clamping voltage specification: SMBJ110CA clamps at 177V maximum compared to the SMBJ110C at 185.85V. This 8.85V differential represents a tighter clamping characteristic, which provides enhanced transient suppression performance in general-purpose applications.

The SMBJ110CA operates across a slightly narrower temperature range (-55°C to 150°C versus -65°C to 150°C). For applications requiring operation below -55°C, the lower temperature limit of the original SMBJ110C must be evaluated against actual system requirements.

Both components are housed in identical DO-214AA (SMB) surface mount packages, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ110CA directly replace the SMBJ110C without circuit modifications?

A: Yes. Both components maintain identical reverse standoff voltage (110V), peak pulse current (3.4A), and power rating (600W). The DO-214AA package footprint is identical, permitting direct substitution on existing PCB layouts.

Q: What is the significance of the clamping voltage difference (177V vs. 185.85V)?

A: The SMBJ110CA exhibits a lower maximum clamping voltage, indicating faster transient suppression. For general-purpose applications, this represents improved performance. Circuit-specific validation is required only if the original design relied on the higher clamping voltage threshold.

Q: Are there temperature range limitations with the SMBJ110CA?

A: The SMBJ110CA operates from -55°C to 150°C, compared to the SMBJ110C range of -65°C to 150°C. Applications requiring operation below -55°C must confirm compatibility with the substitute part's lower temperature limit.

Q: Is the SMBJ110CA RoHS compliant?

A: RoHS compliance status for the SMBJ110CA is not specified in the provided data. Verification with Fairchild Semiconductor documentation is required for applications with RoHS compliance mandates.

Q: What is the package compatibility between these parts?

A: Both the SMBJ110C and SMBJ110CA use the DO-214AA (SMB) surface mount package. Pin configuration, footprint dimensions, and soldering requirements are identical, ensuring seamless PCB integration.

Q: Why is the SMBJ110C listed as obsolete?

A: Littelfuse Inc. has discontinued the SMBJ110C. The SMBJ110CA from Fairchild Semiconductor provides equivalent electrical performance and remains in active production, supporting long-term design continuity.