SMAJ64A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ64A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode in DO-214AC (SMA) surface mount package, rated for 64V reverse standoff voltage with 103V maximum clamping voltage and 3.9A peak pulse current. Manufactured by Diodes Incorporated, this component is discontinued at DiGi Electronics but remains available through alternative sources. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters within the transient voltage suppression category.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	64V
Voltage - Breakdown (Min)	71.1V
Voltage - Clamping (Max) @ Ipp	103V
Current - Peak Pulse (10/1000µs)	3.9A
Power - Peak Pulse	400W
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the SMAJ64A-13 are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff: 64V ± tolerance
Voltage - Clamping (Max) @ Ipp: 103V
Current - Peak Pulse (10/1000µs): 3.9A ± tolerance
Power - Peak Pulse: 400W
Package / Case: DO-214AC (SMA) or equivalent surface mount package
Mounting Type: Surface Mount
Operating Temperature Range: -55°C minimum to 150°C minimum
Type: Zener unidirectional TVS diode

Parts meeting these criteria are considered direct substitutes. Variations in peak pulse current within 3.88A to 4A range and clamping voltage within 103V specification are acceptable. Package variations (SOD-123W) are noted where applicable.

Parameter Comparison

Parameter	SMAJ64A-13 (Diodes Inc.)	SMAJ64A (Meritek)	P4SMA75A (Eaton)	PTVS64VS1UR,115 (Nexperia)	SMAJ64A-TP (MCC)
Voltage - Reverse Standoff (Typ)	64V	64V	64.1V	64V	64V
Voltage - Breakdown (Min)	71.1V	71.1V	71.3V	71.1V	71.1V
Voltage - Clamping (Max) @ Ipp	103V	103V	103V	103V	103V
Current - Peak Pulse (10/1000µs)	3.9A	3.88A	4A	3.9A	3.9A
Power - Peak Pulse	400W	400W	400W	400W	400W
Package / Case	DO-214AC, SMA	DO-214AC (SMA)	DO-214AC, SMA	SOD-123W	DO-214AC, SMA
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TA)	-55°C ~ 175°C (TA)
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts meet the core electrical specifications of the SMAJ64A-13. Selection should be based on the following criteria:

Direct Package Match (DO-214AC/SMA): SMAJ64A (Meritek), P4SMA75A (Eaton), and SMAJ64A-TP (Micro Commercial Co) maintain identical or equivalent package geometry to the original part, enabling direct PCB footprint compatibility without layout modifications.

Compliance Status: SMAJ64A (Meritek), P4SMA75A (Eaton), PTVS64VS1UR,115 (Nexperia), and SMAJ64A-TP (MCC) are all RoHS compliant, addressing environmental and regulatory requirements. The original SMAJ64A-13 is RoHS non-compliant.

Product Availability: SMAJ64A (Meritek) offers the highest inventory level at 122,500 pieces. P4SMA75A (Eaton) provides 22,500 pieces, SMAJ64A-TP (MCC) provides 5,716 pieces, and PTVS64VS1UR,115 (Nexperia) provides 4,300 pieces.

Automotive Grade: PTVS64VS1UR,115 (Nexperia) carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components.

Extended Temperature Range: SMAJ64A-TP (MCC) supports -55°C to 175°C operating temperature, exceeding the original specification of -55°C to 150°C.

Alternative Package: PTVS64VS1UR,115 (Nexperia) uses SOD-123W package instead of DO-214AC/SMA. This substitution requires PCB layout modification and is suitable only when package footprint change is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SMAJ64A (Meritek) be used as a direct replacement for SMAJ64A-13?

A: Yes. SMAJ64A (Meritek) matches all critical electrical parameters: 64V reverse standoff, 103V clamping voltage, 3.88A peak pulse current (within tolerance of 3.9A), and 400W peak pulse power. Package is DO-214AC (SMA), identical to the original. The part is RoHS3 compliant and currently in active production with high inventory availability.

Q: What is the difference between P4SMA75A and SMAJ64A-13?

A: P4SMA75A (Eaton) matches all electrical specifications with 64.1V reverse standoff, 103V clamping voltage, and 4A peak pulse current. The primary difference is manufacturer designation and application focus (Telecom vs. General Purpose). Package is DO-214AC/SMA, identical to the original. P4SMA75A is RoHS compliant.

Q: Why would I choose PTVS64VS1UR,115 if it uses a different package?

A: PTVS64VS1UR,115 (Nexperia) is selected when automotive-grade qualification (AEC-Q101) is required. The SOD-123W package is smaller than DO-214AC/SMA, which may be beneficial for space-constrained designs. This substitution requires PCB redesign and is not a direct drop-in replacement.

Q: Is SMAJ64A-TP compatible with higher temperature applications?

A: Yes. SMAJ64A-TP (MCC) supports operating temperatures from -55°C to 175°C, compared to the original specification of -55°C to 150°C. All other electrical parameters remain equivalent. This part is suitable for applications requiring extended high-temperature operation.

Q: Are all substitute parts MSL 1 (Unlimited)?

A: Yes. All substitute parts listed carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life and no special moisture control requirements during storage or handling.

Q: Can I mix manufacturers in the same design?

A: Yes. All substitute parts meet identical electrical specifications and can be used interchangeably within the same circuit design, provided package compatibility is maintained. Mixing manufacturers is acceptable from an electrical standpoint.

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