SMAJ36A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ36A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in SMA (DO-214AC) surface mount packaging. This component is designed for general-purpose transient voltage suppression applications with a 36V reverse standoff voltage and 58.1V maximum clamping voltage. The SMAJ36A-13 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Type	Zener TVS Diode
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	58.1V
Current - Peak Pulse (10/1000µs)	6.9A
Power - Peak Pulse	400W
Operating Temperature Range	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMAJ36A-13 is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 36V
Voltage - Breakdown (Min): 40V
Voltage - Clamping (Max) @ Ipp: 58.1V
Current - Peak Pulse (10/1000µs): 6.9A
Power - Peak Pulse: 400W
Unidirectional Channels: 1
Type: Zener

Acceptable Variations:

Mounting Type: Surface Mount (required)
Package / Case: DO-214AC (SMA) or equivalent footprint (SOD-123W acceptable with mechanical verification)
Operating Temperature Range: May extend beyond original specification
RoHS Status: May differ from original
Product Status: Active preferred over discontinued

The substitute parts listed below meet all critical electrical parameters while offering improved availability and compliance status.

Parameter Comparison

Parameter	SMAJ36A-13 (Main)	SMAJ36A-13-F	PTVS36VS1UR,115	SMAJ36A (MDD)	SMAJ36A-TP	SZ1SMA36AT3G
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	MDD	Micro Commercial Co	Littelfuse Inc.
Type	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1	1
Voltage - Reverse Standoff (Typ)	36V	36V	36V	36V	36V	36V
Voltage - Breakdown (Min)	40V	40V	40V	40V	40V	40V
Voltage - Clamping (Max) @ Ipp	58.1V	58.1V	58.1V	58.1V	58.1V	58.1V
Current - Peak Pulse (10/1000µs)	6.9A	6.9A	6.9A	6.9A	6.9A	6.9A
Power - Peak Pulse	400W	400W	400W	400W	400W	400W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 175°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AC, SMA	DO-214AC, SMA	SOD-123W	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	None listed	None listed	AEC-Q101	None listed	None listed	AEC-Q101

Engineering Selection Recommendations

SMAJ36A-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. Tape & Reel packaging is available for production volumes.

SMAJ36A-TP (Micro Commercial Co) provides an alternative with extended operating temperature range (-55°C ~ 175°C) and active status. SMA packaging ensures direct footprint compatibility with the original design.

SZ1SMA36AT3G (Littelfuse Inc.) and PTVS36VS1UR,115 (Nexperia USA Inc.) both meet all electrical parameters and include AEC-Q101 automotive qualification. SZ1SMA36AT3G maintains SMA packaging; PTVS36VS1UR,115 uses SOD-123W packaging and requires PCB layout verification for mechanical compatibility.

SMAJ36A (MDD) offers active status and ROHS3 compliance with SMA packaging. Operating temperature range is -50°C ~ 150°C, which covers the original specification minimum.

All listed substitutes are electrically equivalent and support the same circuit protection function as the discontinued SMAJ36A-13.

Frequently Asked Questions (FAQ)

Q: Can PTVS36VS1UR,115 be used as a direct replacement for SMAJ36A-13?

A: PTVS36VS1UR,115 meets all electrical specifications but uses SOD-123W packaging instead of SMA (DO-214AC). PCB footprint and land pattern must be verified for mechanical compatibility before implementation.

Q: What is the difference between SMAJ36A-13-F and SMAJ36A-13?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications. SMAJ36A-13-F is supplied in Tape & Reel packaging and maintains active product status, while SMAJ36A-13 is discontinued. SMAJ36A-13-F also carries ROHS3 compliance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status. The original SMAJ36A-13 is RoHS non-compliant.

Q: Which substitute offers the widest operating temperature range?

A: SMAJ36A-TP (Micro Commercial Co) supports -55°C ~ 175°C, extending 25°C above the original specification maximum.

Q: Do any substitutes include automotive qualification?

A: Yes. SZ1SMA36AT3G (Littelfuse Inc.) and PTVS36VS1UR,115 (Nexperia USA Inc.) both carry AEC-Q101 automotive qualification.

Q: Is packaging compatibility critical for substitution?

A: Yes. SMA (DO-214AC) packaging is standard for five of the six substitutes. PTVS36VS1UR,115 uses SOD-123W and requires PCB layout verification. All other substitutes maintain direct SMA footprint compatibility.

Q: What inventory levels are available for these substitutes?

A: SMAJ36A-13-F: 15,200 pcs; PTVS36VS1UR,115: 18,960 pcs; SMAJ36A (MDD): 7,870 pcs; SMAJ36A-TP: 4,554 pcs; SZ1SMA36AT3G: 9,042 pcs.

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