MASMBJ170A Equivalent & Substitute Parts

Part Overview

The MASMBJ170A 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 170V reverse standoff voltage with a 275V maximum clamping voltage and 2.2A peak pulse current capability in a DO-214AA (SMB) package. The part is currently active in production with military-grade qualification per MIL-PRF-19500. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support component obsolescence management.

Substiute Parts

MASMBJ170A

Microchip TechnologyIn Stock: 688MASMBJ170A Datasheet

Current PartRFQ

SMBJ170A-13

Diodes IncorporatedIn Stock: 969SMBJ170A-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MASMBJ170A are identified based on electrical and mechanical parameter equivalence within the TVS diode category. The substitution criteria are strictly limited to the following parameters:

• Voltage - Reverse Standoff (Typ): 170V
• Voltage - Breakdown (Min): 189V
• Voltage - Clamping (Max) @ Ipp: 275V
• Current - Peak Pulse (10/1000µs): 2.2A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1

Parts meeting all these electrical and mechanical criteria are classified as direct substitutes. Operating temperature range variations within the specified limits do not preclude substitution eligibility. Product status and compliance certifications are secondary considerations for component selection.

Parameter Comparison

*The SMBJ170A-13 operates from -55°C minimum versus -65°C for the MASMBJ170A. Applications requiring operation below -55°C require the MASMBJ170A.

Engineering Selection Recommendations

The SMBJ170A-13 manufactured by Diodes Incorporated is electrically and mechanically equivalent to the MASMBJ170A for applications operating within the -55°C to 150°C temperature range. Both components share identical voltage ratings, current specifications, and package configurations.

The MASMBJ170A is recommended for applications requiring extended low-temperature operation below -55°C or where military-grade qualification per MIL-PRF-19500 is a mandatory design requirement. The MASMBJ170A maintains active production status, ensuring long-term availability.

The SMBJ170A-13 is currently discontinued at DiGi Electronics. Component selection should account for supply chain status and procurement lead times. Both parts are RoHS non-compliant and REACH unaffected, with identical moisture sensitivity classifications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ170A-13 replace the MASMBJ170A in all applications?

A: The SMBJ170A-13 is electrically and mechanically equivalent for applications operating within -55°C to 150°C. Applications requiring operation below -55°C must use the MASMBJ170A. Applications with military qualification requirements must specify the MASMBJ170A per MIL-PRF-19500.

Q: What is the significance of the operating temperature range difference?

A: The MASMBJ170A operates from -65°C minimum junction temperature, while the SMBJ170A-13 operates from -55°C minimum. This 10°C difference affects component selection only for applications with low-temperature requirements below -55°C.

Q: Are the package dimensions identical between these parts?

A: Both components use the DO-214AA (SMB) surface-mount package. Physical dimensions and PCB footprints are identical, enabling direct board-level substitution without layout modifications.

Q: What is the current availability status of these parts?

A: The MASMBJ170A is active in production with 653 pieces in stock. The SMBJ170A-13 is discontinued at DiGi Electronics with 874 pieces available from current inventory. Long-term procurement should prioritize the MASMBJ170A.

Q: Do these parts require different handling or storage procedures?

A: Both components share identical moisture sensitivity levels (MSL 1 - Unlimited), requiring no special moisture control during storage or handling. Standard ESD precautions apply to both parts.

Q: Are there compliance or certification differences between these parts?

A: The MASMBJ170A carries military-grade qualification per MIL-PRF-19500. The SMBJ170A-13 does not list this qualification. Applications requiring military certification must use the MASMBJ170A.