SMAJ22A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ22A-13 is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 22V reverse standoff voltage and provides 35.5V maximum clamping voltage at peak pulse current. The SMAJ22A-13 is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	22	V
Voltage - Breakdown (Min)	24.4	V
Voltage - Clamping (Max) @ Ipp	35.5	V
Current - Peak Pulse (10/1000µs)	11.2	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the SMAJ22A-13 is determined by strict equivalence in the following electrical parameters:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 24.4V
Voltage - Clamping (Max) @ Ipp: 35.5V (±tolerance acceptable)
Current - Peak Pulse (10/1000µs): minimum 11.2A
Power - Peak Pulse: minimum 400W
Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (Same Clamping Voltage): Parts maintaining 35.5V maximum clamping voltage with peak pulse current ≥11.2A and 400W power rating.

Functional Alternatives (Different Clamping Voltage): Parts with identical reverse standoff and breakdown voltages but different clamping characteristics, suitable only where circuit design permits higher clamping voltage tolerance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Operating Temp (°C)	RoHS Status
SMAJ22A-13	Diodes Incorporated	Obsolete	22	35.5	11.2	400	DO-214AC, SMA	-55 to 150	Non-compliant
SMAJ22A-13-F	Diodes Incorporated	Active	22	35.5	11.2	400	DO-214AC, SMA	-55 to 150	ROHS3 Compliant
TV04A220J-G	Comchip Technology	Active	22	35.5	11.27	400	DO-214AC, SMA	-55 to 150	ROHS3 Compliant
PTVS22VS1UR,115	Nexperia USA Inc.	Active	22	35.5	11.3	400	SOD-123W	-55 to 150	ROHS3 Compliant
SM4T26AY	STMicroelectronics	Active	22	48.3	48 (8/20µs)	400	DO-214AC, SMA	-55 to 150	ROHS3 Compliant
SMA6J22A-TP	Micro Commercial Co	Active	22	35.5	16.9	600	DO-214AC, SMA	-55 to 175	Not specified
SMAJ22A	MDD	Active	22	35.5	11.3	400	DO-214AC, SMA	-50 to 150	ROHS3 Compliant
SMAJ22A-TP	Micro Commercial Co	Active	22	35.5	11.2	400	DO-214AC, SMA	-55 to 175	ROHS3 Compliant
SMAJ22AE3/TR13	Microchip Technology	Active	22	35.5	14.1	500	DO-214AC, SMA	-65 to 150	ROHS3 Compliant
SMAJ22E3/TR13	Microchip Technology	Active	22	39.4	12.7	500	DO-214AC, SMA	-65 to 150	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Electrical Equivalent:

SMAJ22A-13-F (Diodes Incorporated) is the direct successor to SMAJ22A-13, maintaining identical electrical specifications while achieving ROHS3 compliance and active product status. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendations - Equivalent Performance:

SMAJ22A-TP (Micro Commercial Co) and SMAJ22A (MDD) provide equivalent electrical performance with 35.5V clamping voltage and 11.2–11.3A peak pulse current. Both are ROHS3 compliant and active. SMAJ22A-TP offers extended operating temperature range (-55 to 175°C) compared to the original specification.

TV04A220J-G (Comchip Technology) delivers equivalent performance in the same DO-214AC (SMA) package with 11.27A peak pulse current and ROHS3 compliance.

SMAJ22AE3/TR13 (Microchip Technology) provides enhanced specifications with 14.1A peak pulse current and 500W power rating, maintaining 35.5V clamping voltage and ROHS3 compliance.

Alternative for Higher Pulse Current Capability:

SM4T26AY (STMicroelectronics) maintains 22V reverse standoff voltage but increases clamping voltage to 48.3V and peak pulse current to 48A (8/20µs). This part is suitable only where circuit design accommodates higher clamping voltage.

Package Consideration:

PTVS22VS1UR,115 (Nexperia USA Inc.) provides equivalent electrical performance but uses SOD-123W package instead of DO-214AC (SMA). This part requires PCB layout modification and is suitable only where package change is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SMAJ22A-13-F be used as a direct replacement for SMAJ22A-13?

A: Yes. SMAJ22A-13-F maintains identical electrical specifications (22V reverse standoff, 35.5V clamping voltage, 11.2A peak pulse current, 400W power) and DO-214AC (SMA) package. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between SMAJ22A-TP and SMAJ22A-13?

A: Both parts share identical electrical specifications and DO-214AC (SMA) packaging. SMAJ22A-TP is active and ROHS3 compliant, with extended operating temperature range (-55 to 175°C vs. -55 to 150°C). Packaging format differs (Tape & Reel vs. unspecified).

Q: Can SM4T26AY replace SMAJ22A-13 in all applications?

A: SM4T26AY maintains 22V reverse standoff voltage but increases clamping voltage to 48.3V and peak pulse current to 48A. Substitution is valid only where circuit design permits higher clamping voltage without exceeding component stress limits or altering protection thresholds.

Q: Why does PTVS22VS1UR,115 use a different package?

A: PTVS22VS1UR,115 uses SOD-123W package instead of DO-214AC (SMA). While electrical specifications are equivalent, package change requires PCB layout modification and is not recommended for direct replacement without design review.

Q: Are all substitute parts RoHS compliant?

A: SMAJ22A-13-F, TV04A220J-G, SMAJ22A, SMAJ22A-TP, SMAJ22AE3/TR13, SMAJ22E3/TR13, and SM4T26AY are ROHS3 compliant. SMA6J22A-TP RoHS status is not specified in available data. PTVS22VS1UR,115 is ROHS3 compliant with automotive qualification (AEC-Q101).

Q: What is the temperature operating range difference between substitute parts?

A: SMAJ22A-13 operates -55 to 150°C. SMAJ22A-TP and SMA6J22A-TP extend to -55 to 175°C. SMAJ22AE3/TR13 and SMAJ22E3/TR13 extend to -65 to 150°C. SMAJ22A (MDD) operates -50 to 150°C. Select based on application thermal requirements.

Q: Can multiple substitute parts be used interchangeably in production?

A: Parts with identical electrical specifications and DO-214AC (SMA) packaging (SMAJ22A-13-F, TV04A220J-G, SMAJ22A, SMAJ22A-TP, SMAJ22AE3/TR13) are mechanically and electrically interchangeable. Parts with different clamping voltages (SM4T26AY, SMAJ22E3/TR13) or packages (PTVS22VS1UR,115) require design validation before production use.

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