SMAJ20CA-13 Equivalent & Substitute Parts

Part Overview

The SMAJ20CA-13 is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the DO-214AC (SMA) surface mount package. This bidirectional Zener diode is designed for general-purpose transient voltage protection with a 20V reverse standoff voltage and 32.4V maximum clamping voltage. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	20V
Voltage - Breakdown (Min)	22.2V
Voltage - Clamping (Max) @ Ipp	32.4V
Current - Peak Pulse (10/1000µs)	12.3A
Power - Peak Pulse	400W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AC, SMA
Type	Zener, Bidirectional

Substitute Part Grouping Explanation

Substitute parts for the SMAJ20CA-13 are grouped based on strict electrical and mechanical compatibility. The primary substitution criteria are:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff: 20V
Voltage - Breakdown (Min): 22.2V
Package / Case: DO-214AC, SMA
Type: Zener, Bidirectional
Mounting Type: Surface Mount

Secondary Parameters (Allowable Variation):

Voltage - Clamping (Max) @ Ipp: 32.4V ± tolerance
Current - Peak Pulse: 12.3A nominal (minor variations acceptable within application limits)
Power - Peak Pulse: 400W nominal
Operating Temperature: -55°C ~ 150°C minimum range

Parts are classified into two categories:

Category 1: Direct Electrical Equivalents — Identical electrical specifications with same clamping voltage (32.4V) and peak pulse current (12.3A). These include SMAJ20CA-13-F, SMAJ20CA, SMAJ20CA-E3/5A, SMAJ20CA-E3/61, and SMAJ20CA-M3/5A.

Category 2: Functional Equivalents — Parts meeting the core voltage and package requirements but with variations in clamping voltage or peak pulse current. These include ATV04A200JB-HF (12.35A), P4SMAJ20CA_R1_00001 (12.3A), SMAJ20C (11.2A, 35.8V clamp), SMA6J20CA-TP (18.5A, 32.4V clamp), and SM4T23CAY (54A, 42.8V clamp).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status	RoHS Status
SMAJ20CA-13	Diodes Incorporated	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Obsolete	Non-compliant
SMAJ20CA-13-F	Diodes Incorporated	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
ATV04A200JB-HF	Comchip Technology	20V	22.2V	32.4V	12.35A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
P4SMAJ20CA_R1_00001	Panjit International Inc.	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SM4T23CAY	STMicroelectronics	20V	22.2V	42.8V	54A (8/20µs)	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMA6J20CA-TP	Micro Commercial Co	20V	22.2V	32.4V	18.5A	600W	-55°C ~ 175°C	DO-214AC, SMA	Active	Not specified
SMAJ20C	Taiwan Semiconductor Corporation	20V	22.2V	35.8V	11.2A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMAJ20CA	MDD	20V	22.2V	32.4V	12.3A	400W	-50°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMAJ20CA-E3/5A	Vishay General Semiconductor - Diodes Division	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMAJ20CA-E3/61	Vishay General Semiconductor - Diodes Division	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMAJ20CA-M3/5A	Vishay General Semiconductor - Diodes Division	20V	22.2V	32.4V	12.3A	400W	-55°C ~ 150°C	DO-214AC, SMA	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SMAJ20CA-13-F

SMAJ20CA-13-F is the direct successor to SMAJ20CA-13, manufactured by Diodes Incorporated with identical electrical specifications. The part is active in production status and ROHS3 compliant, addressing the obsolescence of the original part. Packaging is available in Tape & Reel (TR) format with 17,587 units in stock.

Secondary Recommendations:

SMAJ20CA-E3/61 (Vishay General Semiconductor - Diodes Division) — Exact electrical match with 19,500 units in stock. Active product status with ROHS3 compliance. Supplied in Tape & Reel packaging.

P4SMAJ20CA_R1_00001 (Panjit International Inc.) — Identical specifications with 4,521 units available. Active status and ROHS3 compliant. Supplied in Tape & Reel format.

SMAJ20CA (MDD) — Functionally equivalent with identical electrical parameters. 20,300 units in stock. Active status with ROHS3 compliance. Operating temperature range -50°C ~ 150°C (slightly narrower lower limit than original).

Alternative for Higher Current Applications: SMA6J20CA-TP (Micro Commercial Co)

For applications requiring higher peak pulse current (18.5A vs. 12.3A) and power dissipation (600W vs. 400W), SMA6J20CA-TP maintains the same clamping voltage and standoff voltage. Operating temperature extends to 175°C. Available in bulk packaging with 1,053 units in stock.

Alternative for Higher Clamping Voltage: SM4T23CAY (STMicroelectronics)

For applications requiring higher clamping voltage (42.8V vs. 32.4V) and significantly higher peak pulse current (54A vs. 12.3A), SM4T23CAY provides enhanced transient suppression capability. Automotive grade with AEC-Q101 qualification. 6,093 units in stock.

Frequently Asked Questions (FAQ)

Q: Can SMAJ20CA-13-F be used as a direct replacement for SMAJ20CA-13?

A: Yes. SMAJ20CA-13-F is electrically and mechanically identical to SMAJ20CA-13. Both parts share the same 20V reverse standoff voltage, 32.4V clamping voltage, 12.3A peak pulse current, and DO-214AC (SMA) package. The primary difference is product status: SMAJ20CA-13-F is active in production while SMAJ20CA-13 is obsolete.

Q: What is the difference between SMAJ20CA-13-F and SMAJ20CA-E3/61?

A: Both parts are electrically identical with matching voltage and current specifications. The difference is manufacturer: SMAJ20CA-13-F is from Diodes Incorporated, while SMAJ20CA-E3/61 is from Vishay General Semiconductor - Diodes Division. Both are active, ROHS3 compliant, and supplied in Tape & Reel packaging.

Q: Can I use SM4T23CAY as a substitute?

A: SM4T23CAY is functionally compatible but not a direct replacement. It maintains the 20V reverse standoff voltage and DO-214AC (SMA) package, but has a higher clamping voltage (42.8V vs. 32.4V) and significantly higher peak pulse current (54A vs. 12.3A). Use SM4T23CAY only if your circuit design can accommodate the higher clamping voltage and if the increased current handling is beneficial or neutral to your application.

Q: What does ROHS3 compliance mean for this part?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All recommended active substitutes are ROHS3 compliant, ensuring regulatory compliance for new designs.

Q: Are there packaging differences between substitute parts?

A: Most substitute parts are supplied in Tape & Reel (TR) packaging for automated assembly. SMA6J20CA-TP is supplied in bulk packaging. All parts use the same DO-214AC (SMA) surface mount package, ensuring mechanical compatibility on PCBs.

Q: Which substitute has the highest inventory availability?

A: SMAJ20CA (MDD) has the highest inventory with 20,300 units in stock, followed by SMAJ20CA-E3/61 (Vishay) with 19,500 units. SMAJ20CA-13-F (Diodes Incorporated) has 17,587 units available.

Q: Can I use SMAJ20C as a substitute?

A: SMAJ20C is functionally compatible but not a direct replacement. It has a higher clamping voltage (35.8V vs. 32.4V) and lower peak pulse current (11.2A vs. 12.3A). Use SMAJ20C only if your circuit design can accommodate the higher clamping voltage and if the reduced current handling is acceptable for your application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message