MSMBJ16A Equivalent & Substitute Parts

Part Overview

The MSMBJ16A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 16V reverse standoff voltage with a 26V maximum clamping voltage and 23.1A peak pulse current capability in the SMBJ (DO-214AA) package format. The part is currently active in production with military-grade qualification per MIL-PRF-19500. Identification of equivalent and substitute parts is necessary to address supply chain continuity, inventory management, and design flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

MSMBJ16A

Microchip TechnologyIn Stock: 946MSMBJ16A Datasheet

Current PartRFQ

SMBJ16A-13

Diodes IncorporatedIn Stock: 838SMBJ16A-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSMBJ16A is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Current - Peak Pulse (10/1000µs): 23.1A
• Power - Peak Pulse: 600W
• Type: Zener, Unidirectional (1 channel)

Mechanical Equivalence Criteria:

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Application Criteria:

• Category: Transient Voltage Suppressors (TVS)
• Applications: General Purpose

Substitute parts must match all electrical parameters exactly and maintain identical package and mounting specifications to ensure direct board-level compatibility without circuit redesign or PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

MSMBJ16A (Microchip Technology) - Primary Selection

The MSMBJ16A is the recommended primary component for new designs and ongoing production. This part maintains active product status with 846 units in stock. It carries military-grade qualification per MIL-PRF-19500 and operates across the extended temperature range of -65°C to 150°C, providing superior thermal performance margin for demanding applications. The part is RoHS non-compliant and REACH unaffected, with MSL rating of 1 (Unlimited).

SMBJ16A-13 (Diodes Incorporated) - Substitute Selection

The SMBJ16A-13 provides electrical and mechanical equivalence to the MSMBJ16A across all critical TVS diode parameters: 16V reverse standoff, 17.8V minimum breakdown, 26V clamping voltage, and 23.1A peak pulse current. Both parts are housed in the DO-214AA (SMB) surface-mount package with identical footprints and pinouts. However, this part is discontinued at DiGi Electronics and does not carry military-grade qualification. The operating temperature range is -55°C to 150°C, which is 10°C narrower at the lower bound compared to the primary part. This substitute is suitable for applications where military qualification is not required and the minimum operating temperature does not fall below -55°C.

Compliance and Certification Considerations

Applications requiring MIL-PRF-19500 qualification must use the MSMBJ16A. Applications with temperature requirements below -55°C must use the MSMBJ16A. For general-purpose applications without military specifications or extended low-temperature requirements, the SMBJ16A-13 provides functional equivalence with identical electrical performance and package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ16A-13 be used as a direct replacement for the MSMBJ16A on existing PCBs?

A: Yes, from a mechanical and electrical standpoint. Both parts use the DO-214AA (SMB) surface-mount package with identical footprints and pinouts. All critical electrical parameters—reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current—are identical. However, if the application requires MIL-PRF-19500 qualification or operation below -55°C, the MSMBJ16A must be used.

Q: What is the difference in operating temperature range between these parts?

A: The MSMBJ16A operates from -65°C to 150°C, while the SMBJ16A-13 operates from -55°C to 150°C. The MSMBJ16A provides an additional 10°C of low-temperature capability. For applications with minimum operating temperatures at or above -55°C, both parts are equivalent in this regard.

Q: Are there any differences in electrical performance between the MSMBJ16A and SMBJ16A-13?

A: No. Both parts are specified with identical electrical parameters: 16V reverse standoff voltage, 17.8V minimum breakdown voltage, 26V maximum clamping voltage at peak pulse current, 23.1A peak pulse current (10/1000µs), and 600W peak pulse power. They are electrically interchangeable for general-purpose TVS applications.

Q: Why is the SMBJ16A-13 discontinued at DiGi Electronics?

A: Product discontinuation is a supply chain decision made by distributors and manufacturers. The SMBJ16A-13 is listed as discontinued at DiGi Electronics, which may affect availability. The MSMBJ16A remains in active production with current inventory of 846 units.

Q: Does the MSMBJ16A carry any special certifications?

A: Yes. The MSMBJ16A is qualified to MIL-PRF-19500 and carries a military-grade designation. The SMBJ16A-13 does not specify military qualification. Applications requiring military-grade components must use the MSMBJ16A.

Q: Are both parts RoHS compliant?

A: No. Both the MSMBJ16A and SMBJ16A-13 are RoHS non-compliant. Both are REACH unaffected. Both carry MSL rating 1 (Unlimited moisture sensitivity level).

Q: What is the package designation for these TVS diodes?

A: Both parts use the DO-214AA package, also designated as SMB (Surface Mount Body). This is a standard surface-mount package for TVS diodes with identical land pattern and solder pad configuration on both parts.