SMAJ75A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ75A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 75V reverse standoff voltage with 121V maximum clamping voltage and 3.3A peak pulse current capability in a DO-214AC (SMA) package.

The SMAJ75A-13 is currently discontinued at DiGi Electronics. Equivalent substitute parts are available from alternative manufacturers and packaging configurations that maintain identical electrical specifications and mechanical compatibility, enabling continued system design and production support.

Substiute Parts

SMAJ75A-13

Diodes IncorporatedIn Stock: 946SMAJ75A-13 Datasheet

Current PartRFQ

SMAJ75A

MDDIn Stock: 37444SMAJ75A Datasheet

DirectRFQ

SMAJ75A

MDDIn Stock: 37444SMAJ75A Datasheet

DirectRFQ

SMAJ75A-TP

Micro Commercial CoIn Stock: 5826SMAJ75A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ75A-13 are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 75V
• Voltage - Breakdown (Min): 83.3V
• Voltage - Clamping (Max) @ Ipp: 121V
• Current - Peak Pulse (10/1000µs): 3.3A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these core electrical specifications and mechanical compatibility. Variations in operating temperature range, RoHS compliance status, and packaging format (bulk vs. tape & reel) do not affect functional interchangeability for the specified application.

Parameter Comparison

Engineering Selection Recommendations

SMAJ75A (MDD): This substitute maintains full electrical equivalence with the original SMAJ75A-13 and is currently in active production status. The part is ROHS3 compliant, addressing environmental regulatory requirements. Operating temperature range is -50°C to 150°C, which covers the original part's junction temperature specification of -55°C to 150°C for most applications. Inventory availability is substantial at 37,400 pieces.

SMAJ75A-TP (Micro Commercial Co): This manufacturer-recommended substitute provides identical electrical specifications with extended operating temperature range (-55°C to 175°C), matching the original part's lower temperature limit. The part is supplied in tape & reel packaging format and is ROHS3 compliant. Inventory availability is 5,808 pieces. This option is suitable for applications requiring the original temperature range or tape & reel format for automated assembly.

Both substitute parts are functionally interchangeable with the SMAJ75A-13 at the circuit level. Selection between them depends on packaging requirements (bulk vs. tape & reel), temperature range margin, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can SMAJ75A (MDD) be used as a direct replacement for SMAJ75A-13?

A: Yes. The SMAJ75A from MDD maintains identical electrical specifications: 75V reverse standoff, 83.3V minimum breakdown voltage, 121V maximum clamping voltage, and 3.3A peak pulse current. The DO-214AC (SMA) package is mechanically compatible. The operating temperature range differs slightly (-50°C to 150°C vs. -55°C to 150°C), but this does not affect functional interchangeability in standard applications.

Q: What is the difference between SMAJ75A and SMAJ75A-TP?

A: Both parts are electrically identical. The primary difference is packaging format: SMAJ75A is supplied in bulk, while SMAJ75A-TP is supplied in tape & reel (TR) format. SMAJ75A-TP also offers an extended upper operating temperature limit of 175°C compared to 150°C for the standard SMAJ75A. Both are ROHS3 compliant.

Q: Are there any compliance differences between the original SMAJ75A-13 and the substitute parts?

A: Yes. The original SMAJ75A-13 is RoHS non-compliant. Both substitute parts (SMAJ75A from MDD and SMAJ75A-TP from Micro Commercial Co) are ROHS3 compliant, meeting current environmental regulations for new designs and production.

Q: Which substitute should I select for high-temperature applications?

A: SMAJ75A-TP offers the widest operating temperature range (-55°C to 175°C), making it suitable for applications requiring extended upper temperature limits. The standard SMAJ75A (MDD) is rated to 150°C and is appropriate for most general-purpose applications.

Q: Is the DO-214AC package the same as SMA?

A: Yes. DO-214AC and SMA refer to the same surface-mount package designation. All listed parts use this identical package, ensuring mechanical and electrical compatibility on PCB layouts.