SMAJ7.0A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ7.0A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in SMA (DO-214AC) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 7V reverse standoff voltage and 12V maximum clamping voltage. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

SMAJ7.0A-13

Diodes IncorporatedIn Stock: 882SMAJ7.0A-13 Datasheet

Current PartRFQ

SMAJ7.0A-13-F

Diodes IncorporatedIn Stock: 15430SMAJ7.0A-13-F Datasheet

DirectRFQ

SMAJ7.0A

MDDIn Stock: 105278SMAJ7.0A Datasheet

DirectRFQ

SMAJ7.0A

MDDIn Stock: 105278SMAJ7.0A Datasheet

DirectRFQ

P4SMA8.2A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 1977P4SMA8.2A-E3/61 Datasheet

MFR RecommendedRFQ

PTVS7V0S1UR,115

Nexperia USA Inc.In Stock: 17946PTVS7V0S1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ7.0A-13 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7V
• Voltage - Clamping (Max) @ Ipp: 12V
• Current - Peak Pulse (10/1000µs): 33.3A (±tolerance acceptable)
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC or SMA equivalent
• Unidirectional Channels: 1
• Type: Zener

Substitute parts are grouped into two categories:

Category 1: Direct Electrical & Mechanical Equivalents (Same Package) Parts with identical electrical specifications and SMA/DO-214AC packaging. These provide pin-for-pin and functional compatibility.

Category 2: Functionally Equivalent with Package Variation Parts meeting all electrical specifications but in alternative surface mount packages (SOD-123W). These require PCB layout modification but maintain electrical performance.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SMAJ7.0A-13-F (Diodes Incorporated)

This part is the direct equivalent of the discontinued SMAJ7.0A-13, manufactured by the same supplier with identical electrical specifications and SMA packaging. It is currently in active production status with 15,400 units in stock. The primary distinction is packaging format (Tape & Reel vs. bulk), which does not affect electrical performance. This part achieves ROHS3 compliance, addressing regulatory requirements of the original non-compliant part.

Secondary Recommendation: SMAJ7.0A (MDD)

This alternative provides identical electrical specifications and SMA packaging with significantly higher inventory availability (105,200 units). MDD is an established manufacturer of TVS diodes. The operating temperature range is -50°C to 150°C, which is 5°C narrower at the lower bound compared to the original specification. This part is ROHS3 compliant and suitable for applications not requiring the full -55°C minimum temperature rating.

Tertiary Recommendation: P4SMA8.2A-E3/61 (Vishay General Semiconductor)

This Vishay TransZorb® part meets electrical specifications within acceptable tolerance (7.02V standoff, 12.1V clamping, 33.1A peak pulse). It maintains SMA/DO-214AC packaging compatibility. The operating temperature range extends to -65°C, providing enhanced low-temperature performance. ROHS3 compliant with 1,900 units available.

Alternative for Package-Flexible Applications: PTVS7V0S1UR,115 (Nexperia USA Inc.)

This part provides identical electrical specifications but in SOD-123W package, requiring PCB layout modification. It is AEC-Q101 qualified for automotive applications and ROHS3 compliant. Selection of this part is appropriate only when PCB redesign is feasible and automotive-grade qualification is required.

Frequently Asked Questions (FAQ)

Q: Can SMAJ7.0A-13-F be used as a direct replacement for SMAJ7.0A-13?

A: Yes. SMAJ7.0A-13-F is electrically and mechanically identical to SMAJ7.0A-13. The only difference is packaging format (Tape & Reel). Both use SMA/DO-214AC package with identical pin configuration and electrical performance.

Q: What is the difference between SMAJ7.0A-13 and SMAJ7.0A (MDD)?

A: Both parts have identical electrical specifications and SMA packaging. The differences are manufacturer (Diodes Incorporated vs. MDD) and operating temperature range (-55°C to 150°C vs. -50°C to 150°C). For applications operating above -50°C, MDD part is fully compatible.

Q: Why does P4SMA8.2A-E3/61 show 7.02V standoff instead of 7V?

A: The 7.02V represents the typical value for the Vishay part, which falls within acceptable tolerance for 7V class TVS diodes. The breakdown voltage (7.79V) and clamping voltage (12.1V) remain within specification limits for substitution.

Q: Can PTVS7V0S1UR,115 replace SMAJ7.0A-13 without PCB modification?

A: No. PTVS7V0S1UR,115 uses SOD-123W package while SMAJ7.0A-13 uses SMA package. These packages have different footprints and pin configurations. PCB layout redesign is required for this substitution.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts (SMAJ7.0A-13-F, SMAJ7.0A, P4SMA8.2A-E3/61, and PTVS7V0S1UR,115) are ROHS3 compliant. The original SMAJ7.0A-13 is RoHS non-compliant.

Q: Which substitute part has the best inventory availability?

A: SMAJ7.0A (MDD) has the highest inventory with 105,200 units in stock, followed by PTVS7V0S1UR,115 with 17,844 units and SMAJ7.0A-13-F with 15,400 units.