SMAJ8.0A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ8.0A-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 an 8V reverse standoff voltage and 13.6V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers and product lines.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	8V
Voltage - Breakdown (Min)	8.89V
Voltage - Clamping (Max) @ Ipp	13.6V
Current - Peak Pulse (10/1000µs)	29.4A
Power - Peak Pulse	400W
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)

Substitute Part Grouping Explanation

Substitute parts for the SMAJ8.0A-13 are grouped based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 8V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 13.6V (±tolerance)
Current - Peak Pulse (10/1000µs): 29.4A (±tolerance)
Power - Peak Pulse: 400W
Type: Zener, Unidirectional
Package: DO-214AC (SMA) or equivalent surface mount package
Mounting Type: Surface Mount

Group 1: Direct Electrical & Package Equivalents (SMA Package) Parts matching all primary electrical parameters with identical SMA packaging.

Group 2: Electrical Equivalents with Alternative Packaging (SOD-123W) Parts matching all primary electrical parameters but in different surface mount package.

Group 3: Related Voltage Series (Lower Standoff Voltage) Parts with different voltage ratings that may serve specific application requirements.

Parameter Comparison

Parameter	SMAJ8.0A-13 (Diodes)	SMAJ8.0A-13-F (Diodes)	SMAJ8.0A (Meritek)	PTVS8V0S1UR,115 (Nexperia)	SMAJ8.0A-TP (MCC)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Meritek	Nexperia USA Inc.	Micro Commercial Co
Voltage - Reverse Standoff (Typ)	8V	8V	8V	8V	8V
Voltage - Breakdown (Min)	8.89V	8.89V	8.89V	8.89V	8.89V
Voltage - Clamping (Max) @ Ipp	13.6V	13.6V	13.6V	13.6V	13.6V
Current - Peak Pulse (10/1000µs)	29.4A	29.4A	29.41A	29.4A	29.4A
Power - Peak Pulse	400W	400W	400W	400W	400W
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC (SMA)	SOD-123W	DO-214AC, SMA
Mounting Type	Surface Mount	Tape & Reel (TR)	Surface Mount	Tape & Reel (TR)	Cut Tape (CT)
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C	-55°C ~ 150°C (TA)	-55°C ~ 175°C (TA)
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SMAJ8.0A-13-F (Diodes Incorporated) is the primary direct substitute. This part maintains identical electrical specifications and SMA packaging while offering active product status and ROHS3 compliance. The tape and reel packaging format is standard for production environments.

SMAJ8.0A (Meritek) provides an alternative from a different manufacturer with matching electrical parameters and SMA packaging. Active product status and ROHS3 compliance support long-term availability.

SMAJ8.0A-TP (Micro Commercial Co) offers equivalent electrical performance in SMA package with extended operating temperature range (-55°C to 175°C) and active product status. Cut tape packaging is suitable for lower-volume applications.

PTVS8V0S1UR,115 (Nexperia USA Inc.) matches all electrical specifications but uses SOD-123W package instead of SMA. This part includes AEC-Q101 automotive qualification and ROHS3 compliance. Package substitution requires PCB layout modification.

SMAJ6.0A (MDD) operates at lower voltage ratings (6V standoff, 10.3V clamping) and is not electrically equivalent for applications requiring 8V standoff protection. This part should only be selected for applications with different voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can SMAJ8.0A-13-F directly replace SMAJ8.0A-13 without PCB modification?

A: Yes. SMAJ8.0A-13-F maintains identical electrical specifications and SMA (DO-214AC) package dimensions, enabling direct PCB substitution without layout changes.

Q: What is the difference between tape and reel (TR) and cut tape (CT) packaging?

A: Tape and reel packaging is supplied on continuous carrier tape wound on reels for automated assembly lines. Cut tape is supplied in shorter tape segments for manual or lower-volume assembly. Both formats contain identical components; packaging format selection depends on assembly process requirements.

Q: Why does PTVS8V0S1UR,115 use a different package (SOD-123W) than the original part?

A: SOD-123W is a smaller surface mount package than SMA (DO-214AC). While electrically equivalent, this package requires PCB footprint redesign and cannot be used as a direct drop-in replacement without layout modification.

Q: Is SMAJ6.0A a suitable substitute for SMAJ8.0A-13?

A: No. SMAJ6.0A has a 6V reverse standoff voltage and 10.3V clamping voltage, making it unsuitable for applications requiring 8V standoff protection. This part is only appropriate for circuits designed for lower voltage suppression.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. ROHS3-compliant parts are required for most commercial and industrial applications and support environmental regulatory compliance.

Q: Can I use SMAJ8.0A-TP in applications with operating temperatures above 150°C?

A: SMAJ8.0A-TP is rated to -55°C to 175°C (TA), providing extended high-temperature capability compared to the original SMAJ8.0A-13 specification of -55°C to 150°C (TJ). Verify that your specific application thermal requirements fall within this rated range.

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