SMBJ45C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ45C-E3/5B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 45V reverse standoff voltage and provides clamping at 80.3V maximum. The product is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ45C-E3/5B
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	45V
Voltage - Breakdown (Min)	50V
Voltage - Clamping (Max) @ Ipp	80.3V
Current - Peak Pulse (10/1000µs)	7.5A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SMBJ45C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 45V
Voltage - Breakdown (Min): 50V
Bidirectional Channels: 1
Mounting Type: Surface Mount
Package / Case: DO-214AA, SMB
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1

Substitute parts must maintain identical reverse standoff voltage, breakdown voltage, and package specifications to ensure direct functional replacement. Variations in clamping voltage and peak pulse current are acceptable within the same voltage class, provided the part remains rated for general-purpose TVS applications.

Parameter Comparison

Parameter	SMBJ45C-E3/5B (Main)	SMBJ45CA-E3/5B	SMBJ45CE3/TR13	SMBJ45CA (MDD)	SMBJ45CA-13-F	SMBJ45CA-TP
Manufacturer	Vishay	Vishay	Microchip	MDD	Diodes Inc	Micro Commercial Co
Voltage - Reverse Standoff (Typ)	45V	45V	45V	45V	45V	45V
Voltage - Breakdown (Min)	50V	50V	50V	50V	50V	50V
Voltage - Clamping (Max) @ Ipp	80.3V	72.7V	80.3V	72.7V	72.7V	72.7V
Current - Peak Pulse (10/1000µs)	7.5A	8.3A	7.5A	8.3A	8.3A	8.3A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and maintain MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage conditions.

Primary Substitutes (Exact Electrical Match):

SMBJ45CE3/TR13 (Microchip): Matches the main part's 80.3V clamping voltage and 7.5A peak pulse current. Offers extended lower operating temperature range (-65°C vs -55°C). Product status is active.
SMBJ45CA-E3/5B (Vishay): Maintains Vishay manufacturer continuity with active product status. Clamping voltage is 72.7V with 8.3A peak pulse current, representing a lower clamping profile within the same voltage class.

Secondary Substitutes (Functional Equivalents):

SMBJ45CA-13-F (Diodes Incorporated): Active product with 72.7V clamping and 8.3A peak pulse. Highest inventory availability (66,041 pcs). Maintains -55°C to 150°C operating range.
SMBJ45CA (MDD): Active product with 72.7V clamping and 8.3A peak pulse. Operating range -50°C to 150°C. Largest inventory stock (17,200 pcs).
SMBJ45CA-TP (Micro Commercial Co): Active product with 72.7V clamping and 8.3A peak pulse. Extended upper operating temperature to 175°C. Suitable for high-temperature applications.

All substitutes share identical reverse standoff voltage (45V), breakdown voltage (50V), and package specifications (DO-214AA, SMB) with the original part.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45CA-E3/5B replace SMBJ45C-E3/5B directly?

A: Yes. Both parts maintain 45V reverse standoff voltage, 50V minimum breakdown voltage, and DO-214AA/SMB packaging. The SMBJ45CA-E3/5B has lower clamping voltage (72.7V vs 80.3V) and higher peak pulse current (8.3A vs 7.5A), making it functionally equivalent for general-purpose TVS applications. The substitute is active product status.

Q: What is the difference between 72.7V and 80.3V clamping voltage?

A: Both values fall within the acceptable clamping range for 45V standoff TVS diodes. The 72.7V clamping provides tighter voltage regulation with higher current handling (8.3A), while 80.3V clamping allows slightly higher transient voltages. Selection depends on circuit protection requirements.

Q: Are all substitutes compatible with the same PCB footprint?

A: Yes. All listed substitutes use DO-214AA (SMB) package, ensuring identical PCB footprint and land pattern compatibility. No layout modifications are required.

Q: Which substitute has the best availability?

A: SMBJ45CA-13-F (Diodes Incorporated) has the highest inventory at 66,041 pcs. SMBJ45CA (MDD) offers 17,200 pcs. Both are suitable for high-volume procurement.

Q: Can I use SMBJ45CA-TP for high-temperature applications?

A: Yes. SMBJ45CA-TP supports operating temperatures up to 175°C (junction), compared to 150°C for most other substitutes. This extended range makes it suitable for elevated-temperature circuit environments.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity, meeting standard environmental and regulatory requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message