SMBJ18CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ18CA-M3/52 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 is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ18CA-M3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Series	TransZorb®
Type	Zener
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Voltage - Reverse Standoff (Typ)	18V
Voltage - Breakdown (Min)	20V
Voltage - Clamping (Max) @ Ipp	29.2V
Current - Peak Pulse (10/1000µs)	20.5A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ18CA-M3/52 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 18V
Voltage - Clamping (Max) @ Ipp: 29.2V
Current - Peak Pulse (10/1000µs): 20.5A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 150°C (TJ)

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents — Parts with identical or equivalent voltage ratings, clamping characteristics, and peak pulse current specifications. These parts maintain the same functional performance envelope.

Category 2: Manufacturer Alternatives — Parts from different manufacturers with matching electrical specifications and package compatibility, suitable for supply chain diversification.

Category 3: Related Voltage Ratings — Parts with adjacent voltage ratings (16V, 17V standoff) that may be applicable in applications with different voltage protection requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
SMBJ18CA-M3/52	Vishay General Semiconductor - Diodes Division	18V	20V	29.2V	20.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CA-E3/5B	Vishay General Semiconductor - Diodes Division	18V	20V	29.2V	20.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CD-M3/H	Vishay General Semiconductor - Diodes Division	18V	20.3V	28.8V	20.8A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CA-E3/52	Vishay General Semiconductor - Diodes Division	18V	20V	29.2V	20.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CA-13-F	Diodes Incorporated	18V	20V	29.2V	20.5A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CA-TP	Micro Commercial Co	18V	20V	29.2V	20.5A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active
SMBJ16CA	EVVO Semi	16V	17.8V	26V	23.1A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ17CA	Meritek	17V	18.9V	27.6V	21.74A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ18CA	MDD	18V	20V	29.2V	20.6A	600W	DO-214AA, SMB	-50°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

SMBJ18CA-E3/5B, SMBJ18CA-E3/52, SMBJ18CA-13-F, SMBJ18CA-TP, and SMBJ18CA (MDD) are direct electrical equivalents with matching 18V reverse standoff voltage, 29.2V clamping voltage, and 20.5A peak pulse current specifications. All are Active status and RoHS3 compliant. Selection among these parts is based on packaging format (Tape & Reel vs. Cut Tape), manufacturer availability, and inventory levels.

Extended Temperature Option:

SMBJ18CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C compared to the standard 150°C maximum, suitable for applications requiring enhanced thermal performance.

Lower Temperature Range Option:

SMBJ16CA (EVVO Semi) operates from -65°C minimum, providing extended low-temperature capability. This part carries a 16V reverse standoff voltage and 26V clamping voltage, appropriate for applications with lower voltage protection thresholds.

Adjacent Voltage Rating:

SMBJ17CA (Meritek) provides 17V reverse standoff voltage with 27.6V clamping voltage, positioned between the 16V and 18V options for applications requiring intermediate voltage protection levels.

All substitute parts maintain DO-214AA (SMB) package compatibility, surface mount configuration, and 600W peak pulse power rating. Product status is Active for all listed alternatives, ensuring ongoing manufacturer support and availability.

Frequently Asked Questions (FAQ)

Q: Can SMBJ18CA-TP be used as a direct replacement for SMBJ18CA-M3/52?

A: Yes. Both parts share identical electrical specifications: 18V reverse standoff voltage, 29.2V clamping voltage, and 20.5A peak pulse current. SMBJ18CA-TP extends the upper operating temperature to 175°C, making it suitable for higher-temperature environments while maintaining full electrical compatibility.

Q: What is the difference between SMBJ18CA-E3/5B and SMBJ18CA-E3/52?

A: Both parts are manufactured by Vishay and carry identical electrical specifications. The difference lies in packaging format: E3/5B and E3/52 represent different tape and reel configurations. Electrical performance and component functionality are equivalent.

Q: Is SMBJ16CA a suitable substitute for SMBJ18CA-M3/52?

A: SMBJ16CA is not a direct electrical equivalent. It carries a 16V reverse standoff voltage and 26V clamping voltage compared to the 18V and 29.2V specifications of SMBJ18CA-M3/52. Use SMBJ16CA only when circuit design specifically requires lower voltage protection thresholds.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of SMBJ18CA-M3/52.

Q: Can SMBJ18CD-M3/H replace SMBJ18CA-M3/52?

A: SMBJ18CD-M3/H shares the same 18V reverse standoff voltage but differs in clamping voltage (28.8V vs. 29.2V) and peak pulse current (20.8A vs. 20.5A). These variations fall within acceptable tolerance ranges for general-purpose TVS applications but should be verified against specific circuit requirements before substitution.

Q: What packaging options are available for SMBJ18CA equivalents?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. All maintain DO-214AA (SMB) package configuration for surface mount assembly compatibility.

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