SMBJ75A-13 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMBJ75A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the SMB (DO-214AA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 75V reverse standoff voltage and 121V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

SMBJ75A-13

Diodes IncorporatedIn Stock: 866SMBJ75A-13 Datasheet

Current PartRFQ

SMBJ75A-13-F

Diodes IncorporatedIn Stock: 29529SMBJ75A-13-F Datasheet

DirectRFQ

SMBJ75A

MeritekIn Stock: 4432SMBJ75A Datasheet

DirectRFQ

SMBJ75A

MeritekIn Stock: 4432SMBJ75A Datasheet

DirectRFQ

SMBJ75A

MeritekIn Stock: 4432SMBJ75A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ75A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

• Reverse standoff voltage: 75V
• Breakdown voltage minimum: 83.3V
• Clamping voltage maximum: 121V
• Peak pulse current rating: 4.9A or higher
• Peak pulse power: 600W
• Package: DO-214AA (SMB) surface mount
• Unidirectional configuration (single channel)
• Operating temperature range: -55°C to 150°C

Parts meeting these specifications are classified as direct substitutes. Packaging format (bulk versus tape & reel) does not affect electrical equivalence but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

SMBJ75A-13-F (Diodes Incorporated) is the primary substitute. This part is electrically identical to the original SMBJ75A-13 and is manufactured by the same supplier. The -F suffix indicates tape & reel packaging format. The part is currently in active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

SMBJ75A (Meritek) is an alternative substitute meeting all electrical specifications. Peak pulse current is rated at 4.96A, which exceeds the original 4.9A requirement. This part is in active production status with ROHS3 compliance. Meritek is an alternative manufacturer source for the SMBJ75 series, providing supply chain diversification.

Both substitutes maintain identical voltage ratings, power dissipation, temperature operating range, and SMB package configuration. Selection between them should be based on procurement availability, lead time, and supply chain strategy.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75A-13-F be used as a direct replacement for SMBJ75A-13?

A: Yes. SMBJ75A-13-F is electrically and mechanically identical to SMBJ75A-13. The only difference is packaging format (tape & reel versus bulk). Both are manufactured by Diodes Incorporated with identical electrical specifications.

Q: What is the difference between SMBJ75A-13 and SMBJ75A?

A: The SMBJ75A-13 is a Diodes Incorporated part number variant. SMBJ75A is the base part number used by multiple manufacturers including Meritek. All three parts (SMBJ75A-13, SMBJ75A-13-F, and Meritek SMBJ75A) meet the same electrical specifications for 75V standoff voltage and 121V clamping voltage.

Q: Are there any compliance differences between the substitutes?

A: SMBJ75A-13 is RoHS non-compliant. SMBJ75A-13-F and Meritek SMBJ75A are both ROHS3 compliant. For applications requiring RoHS compliance, SMBJ75A-13-F or Meritek SMBJ75A must be selected.

Q: Does packaging format affect circuit performance?

A: No. Tape & reel (TR) packaging and bulk packaging contain identical components. Packaging format affects only procurement, storage, and assembly handling. Electrical performance is unchanged.

Q: Can I substitute a different voltage rating TVS diode?

A: No. The 75V standoff voltage and 121V clamping voltage are circuit-critical parameters. Substitution is limited to parts with identical voltage specifications. Different voltage ratings will not provide equivalent transient suppression.

Q: What is the peak pulse current difference between 4.9A and 4.96A?

A: The Meritek SMBJ75A is rated at 4.96A peak pulse current, which is 0.06A higher than the original 4.9A specification. This represents a 1.2% increase and provides additional current handling margin. This difference does not affect substitution compatibility.