SMBJ48C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ48C-E3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ48C-E3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Package / Case	DO-214AA, SMB
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	85.5V
Current - Peak Pulse (10/1000µs)	7A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SMBJ48C-E3/52 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 48V
Package / Case: DO-214AA, SMB
Bidirectional Channels: 1
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Substitute parts must maintain the same reverse standoff voltage (48V), identical package form factor (DO-214AA/SMB), and surface mount compatibility. Variations in clamping voltage, peak pulse current, and operating temperature range are acceptable within the constraints of the application circuit. All substitute parts listed maintain the same base product number (SMBJ48) and general-purpose application classification.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status	RoHS Status
SMBJ48C-E3/52	Vishay General Semiconductor - Diodes Division	48V	85.5V	7A	600W	-55°C ~ 150°C	DO-214AA, SMB	Obsolete	ROHS3 Compliant
SMBJ48CA-E3/52	Vishay General Semiconductor - Diodes Division	48V	77.4V	7.8A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ48CE3/TR13	Microchip Technology	48V	85.5V	7A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ48CA	MDD	48V	77.4V	7.8A	600W	-50°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ48CA-13	Diodes Incorporated	48V	77.4V	7.7A	600W	-55°C ~ 150°C	DO-214AA, SMB	Discontinued at DiGi Electronics	RoHS non-compliant
SMBJ48CA-13-F	Diodes Incorporated	48V	77.4V	7.7A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ48CA-TR	STMicroelectronics	48V	77.4V	8.1A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SMBJ48CE3/TR13 (Microchip Technology)

This part provides the closest electrical match to the obsolete SMBJ48C-E3/52, with identical clamping voltage (85.5V) and peak pulse current (7A). It maintains ROHS3 compliance and extends the operating temperature range to -65°C, offering enhanced performance in low-temperature environments. Active product status ensures long-term availability.

Secondary Recommendation: SMBJ48CA-E3/52 (Vishay General Semiconductor - Diodes Division)

This Vishay part maintains the same manufacturer lineage as the original component and offers active product status. The reduced clamping voltage (77.4V) and increased peak pulse current (7.8A) provide improved transient suppression characteristics while maintaining identical operating temperature range and ROHS3 compliance.

Alternative Recommendation: SMBJ48CA-13-F (Diodes Incorporated)

This part is suitable for applications requiring ROHS3 compliance and active product status. The clamping voltage (77.4V) and peak pulse current (7.7A) fall within acceptable substitution parameters. Tape & Reel packaging supports high-volume production requirements.

Not Recommended: SMBJ48CA-13 (Diodes Incorporated)

This part is discontinued at DiGi Electronics and does not meet ROHS3 compliance requirements. Use only if existing inventory is available and RoHS non-compliance is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48CA-E3/52 replace SMBJ48C-E3/52 directly?

A: Yes. Both parts maintain 48V reverse standoff voltage, identical DO-214AA/SMB package, and ROHS3 compliance. The clamping voltage difference (77.4V vs. 85.5V) represents improved transient suppression performance. Verify circuit design tolerances for clamping voltage specifications before implementation.

Q: What is the difference between clamping voltage and reverse standoff voltage?

A: Reverse standoff voltage (48V) is the maximum voltage the diode blocks without conducting. Clamping voltage (77.4V to 85.5V) is the maximum voltage across the diode during a transient pulse event. Lower clamping voltage provides better transient suppression.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with the original SMBJ48C-E3/52 footprint.

Q: Does operating temperature range affect substitution?

A: Operating temperature range does not prevent substitution. SMBJ48CE3/TR13 extends the lower temperature limit to -65°C, which is beneficial for applications in extreme environments. SMBJ48CA (MDD) operates to -50°C, which is acceptable for most general-purpose applications.

Q: Why is SMBJ48CA-13 not recommended?

A: SMBJ48CA-13 is discontinued at DiGi Electronics and does not meet ROHS3 compliance. Use SMBJ48CA-13-F instead, which is the active, compliant variant of the same part family.

Q: Can I use parts with different peak pulse currents?

A: Yes, provided the application circuit does not exceed the specified peak pulse current of the substitute part. Higher peak pulse current ratings (7.8A, 8.1A) offer improved transient handling capability compared to the original 7A specification.

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