SMB8J20C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMB8J20C-E3/52 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AA (SMB) surface mount package and is designed for general-purpose transient voltage suppression applications. The part is currently classified as obsolete, making equivalent 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	35.8V
Current - Peak Pulse (10/1000µs)	22.3A
Power - Peak Pulse	800W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMB8J20C-E3/52 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 20V (all substitutes must match)
Voltage - Breakdown (Min): 22.2V (all substitutes must match)
Package / Case: DO-214AA, SMB (all substitutes must match)
Mounting Type: Surface Mount (all substitutes must match)
Type: Zener, Bidirectional (all substitutes must match)

Substitute parts are grouped into two categories based on voltage clamping characteristics:

Category A - Higher Clamping Voltage (35.8V): Parts with identical clamping voltage to the original SMB8J20C-E3/52, suitable for applications requiring maximum voltage suppression at the original specification level.

Category B - Lower Clamping Voltage (32.4V): Parts with reduced clamping voltage, suitable for applications where lower clamping voltage is acceptable and provides alternative sourcing options.

All substitute parts maintain the same reverse standoff voltage, breakdown voltage, package type, and mounting configuration as the original part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Package
SMB8J20C-E3/52	Vishay General Semiconductor - Diodes Division	20V	22.2V	35.8V	22.3A	800W	-55°C ~ 150°C	Obsolete	DO-214AA, SMB
SMB8J20CA-E3/52	Vishay General Semiconductor - Diodes Division	20V	22.2V	32.4V	24.7A	800W	-55°C ~ 150°C	Active	DO-214AA, SMB
1SMB20CA TR13 PBFREE	Central Semiconductor Corp	20V	22.2V	32.4V	18.5A	600W	-65°C ~ 150°C	Active	DO-214AA, SMB
SMBJ20CA	Fairchild Semiconductor	20V	22.2V	32.4V	18.6A	600W	-55°C ~ 150°C	Active	DO-214AA, SMB
SMBJ20CA-HR	Littelfuse Inc.	20V	22.2V	32.4V	18.6A	600W	-65°C ~ 150°C	Active	DO-214AA, SMB
SMBJ20CA-TP	Micro Commercial Co	20V	22.2V	32.4V	18.5A	600W	-55°C ~ 175°C	Active	DO-214AA, SMB
SMBJ20CA-TR	STMicroelectronics	20V	22.2V	32.4V	19.4A	600W	-55°C ~ 150°C	Active	DO-214AA, SMB
SMBJ20CE3/TR13	Microchip Technology	20V	22.2V	35.8V	16.7A	600W	-65°C ~ 150°C	Active	DO-214AA, SMB

Engineering Selection Recommendations

For Direct Replacement (Identical Clamping Voltage)

SMBJ20CE3/TR13 (Microchip Technology) provides the closest electrical match with 35.8V clamping voltage identical to the original SMB8J20C-E3/52. This part is active and ROHS3 compliant. The reduced peak pulse current (16.7A vs. 22.3A) and power rating (600W vs. 800W) must be evaluated against application requirements.

For Alternative Sourcing (Lower Clamping Voltage)

SMB8J20CA-E3/52 (Vishay General Semiconductor - Diodes Division) is an active part from the original manufacturer with 32.4V clamping voltage. This part maintains the 800W power rating and higher peak pulse current (24.7A), providing enhanced transient suppression capability within the lower clamping voltage specification.

SMBJ20CA-TR (STMicroelectronics), SMBJ20CA (Fairchild Semiconductor), SMBJ20CA-HR (Littelfuse Inc.), and SMBJ20CA-TP (Micro Commercial Co) are all active alternatives with 32.4V clamping voltage and 600W power rating. All are ROHS3 compliant. SMBJ20CA-TP offers the widest operating temperature range (-55°C ~ 175°C).

1SMB20CA TR13 PBFREE (Central Semiconductor Corp) is an active alternative with extended lower operating temperature (-65°C) and ROHS3 compliance.

All substitute parts maintain the same reverse standoff voltage (20V), breakdown voltage (22.2V), package type (DO-214AA, SMB), and surface mount configuration as the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 32.4V clamping voltage instead of the original 35.8V?

A: Substitution depends on application requirements. The 32.4V clamping voltage is lower than the original specification. Verify that your circuit design tolerates this reduced clamping voltage before substitution.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with the original PCB layout.

Q: What is the difference between the substitute parts with 32.4V clamping voltage?

A: The primary differences are peak pulse current ratings (ranging from 16.7A to 24.7A) and power dissipation (600W or 800W). SMB8J20CA-E3/52 maintains the 800W rating of the original part. Other alternatives are rated at 600W. Operating temperature ranges vary by manufacturer.

Q: Is the SMB8J20C-E3/52 still available?

A: The SMB8J20C-E3/52 is classified as obsolete. All recommended substitute parts are active and available from multiple manufacturers.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Which substitute part is recommended for new designs?

A: For new designs requiring 35.8V clamping voltage, use SMBJ20CE3/TR13 (Microchip Technology). For designs accepting 32.4V clamping voltage, SMB8J20CA-E3/52 (Vishay) or SMBJ20CA-TR (STMicroelectronics) provide active sourcing from established manufacturers.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message