SMBJ20CA-13 Equivalent & Substitute Parts

Part Overview

The SMBJ20CA-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 20V reverse standoff voltage and provides 32.4V maximum clamping voltage at peak pulse current. The SMBJ20CA-13 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ20CA-13
Manufacturer	Diodes Incorporated
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	20V
Voltage - Breakdown (Min)	22.2V
Voltage - Clamping (Max) @ Ipp	32.4V
Current - Peak Pulse (10/1000µs)	18.5A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitute parts for the SMBJ20CA-13 are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 20V
Voltage - Breakdown (Min): 22.2V
Voltage - Clamping (Max) @ Ipp: 32.4V
Current - Peak Pulse (10/1000µs): 18.5A minimum
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature Range: -55°C minimum to 150°C maximum

Substitute parts must maintain electrical equivalence within these parameters and be available in the same SMB surface-mount package. Parts from different manufacturers meeting these specifications are considered direct functional equivalents.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	Product Status
SMBJ20CA-13	Diodes Incorporated	20V	32.4V	18.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Discontinued
SMBJ20CA-13-F	Diodes Incorporated	20V	32.4V	18.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ20CA-TP	Micro Commercial Co	20V	32.4V	18.5A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active
SMBJ20CA-TR	STMicroelectronics	20V	32.4V	19.4A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ20CA	Fairchild Semiconductor	20V	32.4V	18.6A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Primary Recommendation: SMBJ20CA-13-F (Diodes Incorporated)

The SMBJ20CA-13-F is the direct equivalent from the original manufacturer with identical electrical specifications and is currently in active production status. This part maintains full compatibility with the discontinued SMBJ20CA-13 and carries ROHS3 compliance certification.

Alternative Options:

SMBJ20CA-TR (STMicroelectronics) is an active substitute with manufacturer-recommended status. This part exceeds the minimum peak pulse current specification at 19.4A and maintains all other electrical parameters. It carries ROHS3 compliance and is suitable for applications requiring higher current margin.

SMBJ20CA-TP (Micro Commercial Co) provides an extended operating temperature range to 175°C while maintaining all electrical specifications. This option is beneficial for applications in elevated temperature environments.

SMBJ20CA (Fairchild Semiconductor) is available from multiple sources with active product status and meets all electrical requirements with 18.6A peak pulse current specification.

All substitute parts are available in the same DO-214AA SMB surface-mount package and maintain the 600W peak pulse power rating required for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ20CA-13-F be used as a direct replacement for SMBJ20CA-13?

A: Yes. The SMBJ20CA-13-F is electrically and mechanically identical to the SMBJ20CA-13, with the same voltage ratings, current specifications, and SMB package. The primary difference is product status—SMBJ20CA-13-F is in active production.

Q: What is the difference between the packaging designations (-13, -13-F, -TP, -TR)?

A: These designations indicate packaging and tape format variations. The electrical specifications remain constant across these variants. The -13-F indicates Tape & Reel packaging from Diodes Incorporated, -TP indicates Tape & Reel from Micro Commercial Co, and -TR indicates Cut Tape & Digi-Reel from STMicroelectronics.

Q: Are all substitute parts RoHS compliant?

A: SMBJ20CA-13-F, SMBJ20CA-TP, and SMBJ20CA-TR are ROHS3 compliant. The original SMBJ20CA-13 is RoHS non-compliant. Fairchild Semiconductor SMBJ20CA compliance status is not specified in the provided data.

Q: Can I use SMBJ20CA-TR if my application requires -55°C to 150°C operation?

A: Yes. SMBJ20CA-TR operates from -55°C to 150°C, meeting this requirement. The part also provides 19.4A peak pulse current, which exceeds the 18.5A minimum specification.

Q: What is the significance of the 18.5A versus 18.6A and 19.4A peak pulse current differences?

A: All substitute parts meet or exceed the 18.5A minimum specification. Higher values provide additional design margin for transient suppression. Parts with 18.6A and 19.4A ratings are functionally equivalent for applications designed around the 18.5A specification.

Q: Are these parts suitable for power line protection applications?

A: No. All listed parts are designated for general-purpose applications only and do not carry power line protection certification.

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