SMBJ20 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMBJ20 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 20V reverse standoff voltage with a 34.02V maximum clamping voltage and 18.6A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ20 is classified as obsolete, necessitating identification of active equivalent parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	20	V
Voltage - Breakdown (Min)	21.02	V
Voltage - Clamping (Max) @ Ipp	34.02	V
Current - Peak Pulse (10/1000µs)	18.6	A
Power - Peak Pulse	600	W
Type	Zener	-
Unidirectional Channels	1	-
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Operating Temperature Range	-65 to 150	°C (TJ)
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the SMBJ20 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 20V (nominal)
Voltage - Breakdown (Min): 21.02V to 22.2V range
Voltage - Clamping (Max) @ Ipp: 32.4V to 34.02V range
Current - Peak Pulse (10/1000µs): minimum 18.5A
Power - Peak Pulse: 600W or higher
Package / Case: DO-214AA, SMB (surface mount)
Type: Zener, Unidirectional (1 channel)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts listed maintain compatibility within these electrical and mechanical boundaries. Substitute parts are grouped by manufacturer and part number designation while preserving the core functional specifications of the original SMBJ20.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Product Status
SMBJ20	Littelfuse Inc.	20	21.02	34.02	18.6	600	-65 to 150	Obsolete
SMBJ20A	Good-Ark Semiconductor	20	22.2	32.4	18.5	600	-55 to 150	Active
SMB10J20A-E3/52	Vishay General Semiconductor - Diodes Division	20	22.2	32.4	30.9	1000	-55 to 150	Active
SMB10J20A-E3/5B	Vishay General Semiconductor - Diodes Division	20	22.2	32.4	30.9	1000	-55 to 150	Active
SMBJ20A-13-F	Diodes Incorporated	20	22.2	32.4	18.5	600	-55 to 150	Active
SMBJ20A-TP	Micro Commercial Co	20	22.2	32.4	18.5	600	-55 to 175	Active
SMBJ20A-TR	STMicroelectronics	20	22.2	32.4	19.4	600	-55 to 150	Active
TV06B200J-G	Comchip Technology	20	22.2	32.4	18.52	600	Not specified	Active
TV06B200J-HF	Comchip Technology	20	22.2	32.4	18.52	600	Not specified	Active

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory requirements for new designs and production environments.

Primary Substitutes (Closest Electrical Match): SMBJ20A (Good-Ark Semiconductor), SMBJ20A-13-F (Diodes Incorporated), SMBJ20A-TP (Micro Commercial Co), and SMBJ20A-TR (STMicroelectronics) maintain the 600W power rating and 18.5A to 19.4A peak pulse current specifications, providing direct functional equivalence to the original SMBJ20.

Enhanced Performance Alternatives: SMB10J20A-E3/52 and SMB10J20A-E3/5B (Vishay General Semiconductor - Diodes Division) offer increased peak pulse current (30.9A) and power dissipation (1000W), suitable for applications requiring higher transient energy absorption while maintaining the 20V reverse standoff voltage specification.

Extended Temperature Operation: SMBJ20A-TP (Micro Commercial Co) supports operating temperatures to 175°C, compared to the standard 150°C maximum, for applications in elevated thermal environments.

Packaging Availability: All substitute parts are available in DO-214AA (SMB) surface-mount package with Tape & Reel (TR) or Cut Tape (CT) packaging options, ensuring compatibility with automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SMB10J20A-E3/52 and SMB10J20A-E3/5B be used as direct replacements for SMBJ20? A: Yes. Both parts maintain the 20V reverse standoff voltage and DO-214AA (SMB) package. The higher peak pulse current (30.9A) and power rating (1000W) provide enhanced protection capability without compromising circuit compatibility.

Q: What is the difference between SMBJ20A variants from different manufacturers? A: All SMBJ20A variants (Good-Ark, Diodes Incorporated, Micro Commercial Co, STMicroelectronics) share identical voltage specifications (20V standoff, 22.2V breakdown minimum, 32.4V clamping maximum) and 600W power rating. Differences exist in peak pulse current (18.5A to 19.4A) and operating temperature ranges. Selection depends on availability, packaging format, and thermal requirements.

Q: Are TV06B200J-G and TV06B200J-HF suitable substitutes? A: Yes. Both Comchip Technology parts meet the electrical specifications with 20V standoff voltage, 32.4V clamping voltage, and 18.52A peak pulse current in DO-214AA (SMB) package. Operating temperature data is not specified for these parts; confirm thermal requirements with the manufacturer if operating above 150°C.

Q: Does the SMBJ20A-TP extended temperature rating affect circuit performance? A: The SMBJ20A-TP supports operation to 175°C (versus 150°C standard), expanding the usable temperature envelope. Electrical characteristics remain consistent with other SMBJ20A variants at standard operating temperatures.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards for production and long-term storage.

Q: What packaging formats are available for these substitute parts? A: Substitute parts are supplied in Tape & Reel (TR) or Cut Tape (CT) formats with Digi-Reel options. All maintain DO-214AA (SMB) surface-mount package geometry for compatibility with standard pick-and-place assembly equipment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message