SMBJ48A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ48A-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 48V reverse standoff voltage and 77.4V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ48A-13
Manufacturer	Diodes Incorporated
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V
Current - Peak Pulse (10/1000µs)	7.7A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMBJ48A-13 is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 48V
Voltage - Breakdown (Min): 53.3V
Voltage - Clamping (Max) @ Ipp: 77.4V
Current - Peak Pulse (10/1000µs): 7.7A ±0.4A tolerance
Power - Peak Pulse: 600W
Type: Zener, Unidirectional
Mounting Type: Surface Mount
Package / Case: DO-214AA (SMB) or equivalent footprint

Substitute parts are grouped into two categories: direct manufacturer equivalents from Diodes Incorporated with identical electrical specifications, alternative manufacturer equivalents meeting the same electrical parameters, and manufacturer-recommended alternatives with minor parameter variations within acceptable engineering tolerances.

Parameter Comparison

Parameter	SMBJ48A-13 (Main)	SMBJ48A-13-F	SMBJ48A-TP	PTVS48VP1UP,115	SMBJ48A (Meritek)	SMBJ48A-TR
Manufacturer	Diodes Incorporated	Diodes Incorporated	Micro Commercial Co	Nexperia USA Inc.	Meritek	STMicroelectronics
Product Status	Discontinued	Active	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	48V	48V	48V	48V	48V	48V
Voltage - Breakdown (Min)	53.3V	53.3V	53.3V	53.3V	53.3V	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V	77.4V	77.4V	77.4V	77.4V	77.4V
Current - Peak Pulse (10/1000µs)	7.7A	7.7A	7.7A	7.8A	7.75A	8.1A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 175°C (TJ)	-55°C ~ 150°C (TA)	-55°C ~ 150°C	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	SOD-128	DO-214AA (SMB)	DO-214AA, SMB
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	-	-	-	AEC-Q101	-	-

Engineering Selection Recommendations

SMBJ48A-13-F (Diodes Incorporated) is the primary direct substitute. It maintains identical electrical specifications and is manufactured by the original supplier. This part is active and ROHS3 compliant, addressing the RoHS non-compliance status of the discontinued SMBJ48A-13.

SMBJ48A-TP (Micro Commercial Co) provides equivalent electrical performance with an extended operating temperature range to 175°C. This part is suitable for applications requiring higher thermal margins while maintaining SMB package compatibility.

SMBJ48A (Meritek) offers the same electrical specifications with high inventory availability. This part is ROHS3 compliant and suitable for general-purpose applications requiring the SMBJ48 base specification.

SMBJ48A-TR (STMicroelectronics) is an active substitute with peak pulse current of 8.1A, providing additional margin above the 7.7A specification. This part is ROHS3 compliant and maintains SMB package compatibility.

PTVS48VP1UP,115 (Nexperia USA Inc.) is a manufacturer-recommended alternative with AEC-Q101 automotive qualification. This part uses the SOD-128 package instead of SMB, requiring PCB layout modification. Peak pulse current is 7.8A. This option is suitable for automotive applications requiring automotive-grade qualification.

Frequently Asked Questions (FAQ)

Q: Can PTVS48VP1UP,115 be used as a direct drop-in replacement?

A: No. While electrically equivalent, PTVS48VP1UP,115 uses the SOD-128 package instead of DO-214AA (SMB). PCB footprint and layout modifications are required. Select this part only if automotive qualification (AEC-Q101) is a design requirement.

Q: What is the difference between SMBJ48A-13-F and SMBJ48A-13?

A: SMBJ48A-13-F is the tape and reel packaged version of the same part. Both share identical electrical specifications. SMBJ48A-13-F is currently active with ROHS3 compliance, while SMBJ48A-13 is discontinued and RoHS non-compliant.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitutes except the original SMBJ48A-13 are ROHS3 compliant. If RoHS compliance is required, select from the active substitute options.

Q: Which substitute has the highest peak pulse current rating?

A: SMBJ48A-TR (STMicroelectronics) has the highest peak pulse current at 8.1A, providing additional design margin compared to the 7.7A specification of SMBJ48A-13.

Q: Is automotive qualification available for SMB package options?

A: No. Among the SMB package substitutes (SMBJ48A-13-F, SMBJ48A-TP, SMBJ48A, SMBJ48A-TR), none carry AEC-Q101 qualification. PTVS48VP1UP,115 provides AEC-Q101 qualification but requires the SOD-128 package.

Q: Can I use SMBJ48A-TP for applications with higher temperature requirements?

A: Yes. SMBJ48A-TP supports operating temperatures to 175°C (TJ), compared to 150°C for other SMB options. This extended range is suitable for high-temperature environments while maintaining identical electrical performance.

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