SMBJ400A-TP Equivalent & Substitute Parts

Part Overview

The SMBJ400A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient voltage protection in surface mount applications. The device features a 400V reverse standoff voltage with 648V maximum clamping voltage and 900mA peak pulse current capability in a DO-214AA (SMB) package. This component is active in production and ROHS3 compliant. Substitute parts are identified when electrical characteristics and mechanical compatibility align with the original specification, enabling component sourcing flexibility while maintaining circuit performance.

Substiute Parts

SMBJ400A-TP

Micro Commercial CoIn Stock: 2564SMBJ400A-TP Datasheet

Current PartRFQ

SMBJ400A

SMC Diode SolutionsIn Stock: 19522SMBJ400A Datasheet

DirectRFQ

SMBJ400A

SMC Diode SolutionsIn Stock: 19522SMBJ400A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ400A-TP are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 400V
• Voltage - Breakdown (Min): 447V
• Voltage - Clamping (Max) @ Ipp: 648V
• Current - Peak Pulse (10/1000µs): 900mA
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Type: Zener, Unidirectional (1 channel)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

The SMBJ400A manufactured by SMC Diode Solutions meets all critical electrical specifications and package requirements. Both the main part and substitute maintain identical voltage ratings, current handling, and power dissipation characteristics. Surface mount compatibility and RoHS3 compliance are preserved across the substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ400A-TP (Micro Commercial Co) and SMBJ400A (SMC Diode Solutions) are active production components with ROHS3 compliance and MSL 1 rating. The substitute part maintains all critical electrical parameters including voltage ratings, current capacity, and power dissipation. The operating temperature range of the SMC Diode Solutions variant extends to 150°C maximum junction temperature, which is 25°C lower than the original specification. Component selection should account for the specific thermal environment of the application. Both parts are surface mount compatible in DO-214AA (SMB) packages and suitable for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: What determines if SMBJ400A from SMC Diode Solutions is a valid substitute for SMBJ400A-TP?

A: Substitution is valid when the following parameters match: reverse standoff voltage (400V), breakdown voltage (447V minimum), clamping voltage (648V maximum), peak pulse current (900mA), peak pulse power (600W), package type (DO-214AA/SMB), and device type (Zener, unidirectional). Both parts meet these criteria.

Q: Are there differences in operating temperature between the main part and substitute?

A: The SMBJ400A-TP operates from -55°C to 175°C junction temperature, while the SMBJ400A (SMC Diode Solutions) operates from -55°C to 150°C. Applications requiring operation above 150°C junction temperature must use the original SMBJ400A-TP specification.

Q: Is the DO-214AA package identical to SMB?

A: DO-214AA and SMB refer to the same surface mount package. Both designations are equivalent and interchangeable for PCB assembly and footprint compatibility.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both SMBJ400A-TP and SMBJ400A carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both components are ROHS3 compliant and suitable for applications requiring RoHS certification.