SMBJ120A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ120A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 120V reverse standoff voltage and 193V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ120A-13
Manufacturer	Diodes Incorporated
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	120V
Voltage - Breakdown (Min)	133V
Voltage - Clamping (Max) @ Ipp	193V
Current - Peak Pulse (10/1000µs)	3.1A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Applications	General Purpose
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ120A-13 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 120V
Voltage - Breakdown (Min): 133V
Voltage - Clamping (Max) @ Ipp: 193V
Current - Peak Pulse (10/1000µs): 3.1A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener

All substitute parts listed maintain identical electrical specifications across these parameters. Package compatibility (DO-214AA/SMB) ensures direct PCB footprint compatibility. Operating temperature ranges may vary within acceptable limits for general-purpose applications.

Parameter Comparison

Parameter	SMBJ120A-13 (Diodes Inc.)	SMBJ120A-13-F (Diodes Inc.)	SMBJ120A-TP (Micro Commercial Co)	P6SMBJ120A_R1_00001 (Panjit)	SMBJ120A (MDD)
Voltage - Reverse Standoff (Typ)	120V	120V	120V	120V	120V
Voltage - Breakdown (Min)	133V	133V	133V	133V	133V
Voltage - Clamping (Max) @ Ipp	193V	193V	193V	193V	193V
Current - Peak Pulse (10/1000µs)	3.1A	3.1A	3.1A	3.1A	3.1A
Power - Peak Pulse	600W	600W	600W	600W	600W
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-50°C ~ 150°C
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the SMBJ120A-13. Selection should be based on product availability, compliance requirements, and operational constraints:

SMBJ120A-13-F (Diodes Incorporated): Direct manufacturer equivalent with tape & reel packaging. ROHS3 compliant. Recommended for applications requiring continuity with the original manufacturer and compliance with RoHS3 standards.

SMBJ120A-TP (Micro Commercial Co): Functionally equivalent with extended operating temperature range (-55°C ~ 175°C). ROHS3 compliant. Suitable for applications requiring higher temperature operation. Highest inventory availability (4079 pcs).

P6SMBJ120A_R1_00001 (Panjit International Inc.): Manufacturer-recommended equivalent with identical electrical specifications. ROHS3 compliant. Tape & reel packaging. Suitable for high-volume production applications.

SMBJ120A (MDD): Functionally equivalent with slightly reduced minimum operating temperature (-50°C vs -55°C). ROHS3 compliant. Highest inventory availability (44400 pcs). Suitable for applications not requiring -55°C operation.

Frequently Asked Questions (FAQ)

Q: Can SMBJ120A-13-F be used as a direct replacement for SMBJ120A-13?

A: Yes. SMBJ120A-13-F is a direct equivalent from the same manufacturer (Diodes Incorporated) with identical electrical and mechanical specifications. The primary difference is packaging format (tape & reel vs. bulk) and RoHS3 compliance status.

Q: What is the difference between SMBJ120A-TP and other substitutes?

A: SMBJ120A-TP has an extended operating temperature range of -55°C ~ 175°C compared to -55°C ~ 150°C for most other variants. This makes it suitable for applications requiring higher temperature operation. All other electrical parameters remain identical.

Q: Are all substitute parts compatible with the original PCB footprint?

A: Yes. All substitute parts use the DO-214AA (SMB) package, ensuring identical PCB footprint compatibility and direct drop-in replacement capability.

Q: Does the MDD SMBJ120A have any operational limitations compared to the original part?

A: The MDD variant has a minimum operating temperature of -50°C instead of -55°C. This is the only parameter difference. For applications operating above -50°C, this part is fully equivalent.

Q: Which substitute offers the best compliance profile?

A: All active substitute parts are ROHS3 compliant. The original SMBJ120A-13 is RoHS non-compliant. For applications requiring RoHS3 compliance, any of the listed substitutes are suitable.

Q: What inventory considerations should guide part selection?

A: SMBJ120A (MDD) offers the highest inventory availability at 44400 pcs. SMBJ120A-TP (Micro Commercial Co) provides 4079 pcs. Both are suitable for high-volume production requirements.

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