SMBJ48-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ48-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with a 48V reverse standoff voltage and provides 85.5V maximum clamping voltage at peak pulse current, housed in a DO-214AA (SMB) surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	48	V
Voltage - Breakdown (Min)	53.3	V
Voltage - Clamping (Max) @ Ipp	85.5	V
Current - Peak Pulse (10/1000µs)	7	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution of the SMBJ48-E3/52 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 48V (exact match required)
Voltage - Breakdown (Min): 53.3V (exact match required)
Current - Peak Pulse (10/1000µs): 7A minimum
Power - Peak Pulse: 600W minimum
Voltage - Clamping (Max) @ Ipp: 85.5V maximum (lower values acceptable)

Mechanical Compatibility Criteria:

Package / Case: DO-214AA or SMB (equivalent)
Mounting Type: Surface Mount
Type: Zener diode, unidirectional

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories based on clamping voltage performance: Group A maintains the 85.5V clamping specification, while Group B operates at 77.4V clamping voltage. Both groups satisfy the core electrical requirements and mechanical constraints.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package	Product Status
SMBJ48-E3/52	Vishay General Semiconductor	48	53.3	85.5	7	600	-55 to 150	DO-214AA (SMBJ)	Obsolete
SMBJ48A-E3/52	Vishay General Semiconductor	48	53.3	77.4	7.8	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ48E3/TR13	Microchip Technology	48	53.3	85.5	7	600	-65 to 150	DO-214AA (SMBJ)	Active
1SMB48A TR13 PBFREE	Central Semiconductor Corp	48	53.3	77.4	7.7	600	-65 to 150	DO-214AA, SMB	Active
SMBJ48A	Meritek	48	53.3	77.4	7.75	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ48A-13-F	Diodes Incorporated	48	53.3	77.4	7.7	600	-55 to 150	DO-214AA, SMB	Active
SMBJ48A-HR	Littelfuse Inc.	48	53.3	77.4	7.8	600	-65 to 150	DO-214AA (SMBJ)	Active
SMBJ48A-HRA	Littelfuse Inc.	48	53.3	77.4	7.8	600	-65 to 150	DO-214AA (SMBJ)	Active
SMBJ48A-TP	Micro Commercial Co	48	53.3	77.4	7.7	600	-55 to 175	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation: SMBJ48E3/TR13 (Microchip Technology)

This part maintains exact electrical specifications matching the original SMBJ48-E3/52, including 85.5V clamping voltage and 7A peak pulse current. Microchip Technology is an active manufacturer with established supply chain presence. The extended operating temperature range (-65°C to 150°C) provides additional thermal margin. Product status is active with confirmed inventory availability.

Secondary Recommendation: SMBJ48A-E3/52 (Vishay General Semiconductor)

As the direct successor from the original manufacturer, this part shares the same base platform and packaging. While clamping voltage is reduced to 77.4V, all other electrical parameters remain within specification. Active product status ensures long-term availability and supply continuity. Identical operating temperature range to the original part.

Alternative Options: SMBJ48A-HR, SMBJ48A-HRA (Littelfuse Inc.), SMBJ48A-13-F (Diodes Incorporated), SMBJ48A-TP (Micro Commercial Co), 1SMB48A TR13 PBFREE (Central Semiconductor Corp), SMBJ48A (Meritek)

These alternatives operate at 77.4V clamping voltage with peak pulse currents between 7.7A and 7.8A. All maintain the 48V reverse standoff and 53.3V breakdown specifications. Selection among these options depends on packaging format requirements (Tape & Reel vs. bulk), temperature range needs, and supplier availability. All are RoHS3 compliant with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48A-E3/52 directly replace SMBJ48-E3/52?

A: Yes. Both parts share identical reverse standoff voltage (48V), breakdown voltage (53.3V), and power rating (600W). The clamping voltage difference (77.4V vs. 85.5V) represents improved performance in transient suppression. Operating temperature range is identical. Mechanical compatibility is confirmed through identical DO-214AA (SMBJ) packaging.

Q: What is the significance of the clamping voltage difference between 85.5V and 77.4V?

A: Clamping voltage determines the maximum voltage the diode allows across its terminals during a transient event. Lower clamping voltage (77.4V) provides superior protection by limiting voltage rise to a lower threshold. This is an improvement over the original 85.5V specification and does not compromise compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 Compliant certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution. The original part operates -55°C to 150°C. Several substitutes extend this to -65°C to 150°C, providing additional thermal margin. The SMBJ48A-TP variant extends to -55°C to 175°C. Selection should match application requirements; extended ranges do not create incompatibility.

Q: What packaging formats are available?

A: All substitute parts use DO-214AA (SMB) surface mount packaging, maintaining mechanical compatibility with the original SMBJ48-E3/52. Packaging options include Cut Tape (CT), Digi-Reel, and standard Tape & Reel (TR) formats. Selection depends on production volume and assembly requirements.

Q: Is SMBJ48E3/TR13 from Microchip Technology a direct equivalent?

A: Yes. SMBJ48E3/TR13 maintains all electrical specifications of the original part, including 85.5V clamping voltage, 7A peak pulse current, and 600W power rating. Extended operating temperature range (-65°C to 150°C) and active product status make it a direct functional equivalent suitable for new designs and production replacement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message