SMBJ40CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ40CA-M3/5B 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 in production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	40	V
Voltage - Breakdown (Min)	44.4	V
Voltage - Clamping (Max) @ Ipp	64.5	V
Current - Peak Pulse (10/1000µs)	9.3	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ40CA-M3/5B are classified based on electrical parameter equivalence and package compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Reverse Standoff (Typ): 40V
Voltage - Clamping (Max) @ Ipp: 64.5V
Current - Peak Pulse (10/1000µs): 9.3A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Substitution Categories:

Category 1: Direct Electrical Equivalents (Identical Parameters) Parts with matching reverse standoff voltage (40V), clamping voltage (64.5V), and peak pulse current (9.3A). These parts differ only in packaging format (Tape & Reel vs. Cut Tape) or manufacturer source.

Category 2: Manufacturer Variants (Same Base Specifications) Parts from different manufacturers (Comchip Technology, MDD, Diodes Incorporated) with identical electrical specifications and DO-214AA/SMB package compatibility.

Category 3: Related Voltage Ratings (Alternate Standoff Voltages) Parts with different reverse standoff voltages (43V, 45V) that maintain the same package and general application class but with adjusted clamping characteristics. These are suitable only when circuit design permits voltage rating variation.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Packaging Format	Operating Temperature
SMBJ40CA-M3/5B	Vishay	40V	64.5V	9.3A	600W	DO-214AA, SMB	Tape & Reel (TR)	-55 to 150°C
SMBJ40CA-E3/52	Vishay	40V	64.5V	9.3A	600W	DO-214AA, SMB	Cut Tape (CT)	-55 to 150°C
SMBJ40CD-M3/I	Vishay	40V	63.6V	9.43A	600W	DO-214AA, SMB	Tape & Reel (TR)	-55 to 150°C
SMBJ40CA-E3/5B	Vishay	40V	64.5V	9.3A	600W	DO-214AA, SMB	Tape & Reel (TR)	-55 to 150°C
ATV06B400JB-HF	Comchip Technology	40V	64.5V	9.3A	600W	DO-214AA, SMB	Tape & Reel (TR)	-55 to 150°C
SMBJ40CA	MDD	40V	64.5V	9.3A	600W	DO-214AA, SMB	Not Specified	-50 to 150°C
SMBJ40CA-13-F	Diodes Incorporated	40V	64.5V	9.3A	600W	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	-55 to 150°C
SMBJ43CA	MDD	43V	69.4V	8.7A	600W	DO-214AA, SMB	Not Specified	-50 to 150°C
SMBJ45CA	MDD	45V	72.7V	8.3A	600W	DO-214AA, SMB	Not Specified	-50 to 150°C

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Performance):

SMBJ40CA-E3/5B, SMBJ40CA-E3/52, SMBJ40CA-13-F, and ATV06B400JB-HF are direct electrical equivalents with 40V reverse standoff voltage and 64.5V clamping voltage. Selection among these parts depends on packaging format requirements (Tape & Reel vs. Cut Tape) and procurement availability. All maintain ROHS3 compliance and MSL 1 rating.

Vishay Variant (SMBJ40CD-M3/I):

This Vishay part maintains 40V reverse standoff voltage with marginally different clamping voltage (63.6V vs. 64.5V) and peak pulse current (9.43A vs. 9.3A). The electrical variation is within typical device tolerance ranges for the same base product family.

Alternative Voltage Ratings (SMBJ43CA, SMBJ45CA):

These parts feature higher reverse standoff voltages (43V and 45V respectively) with correspondingly higher clamping voltages. Selection of these alternatives requires circuit design verification to confirm compatibility with the higher voltage ratings. Both maintain 600W peak pulse power and DO-214AA/SMB package compatibility.

Compliance Considerations:

All listed substitutes maintain ROHS3 compliance and MSL 1 rating. The ATV06B400JB-HF from Comchip Technology carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can SMBJ40CA-E3/52 replace SMBJ40CA-M3/5B directly?

A: Yes. Both parts have identical electrical specifications (40V reverse standoff, 64.5V clamping, 9.3A peak pulse current). The difference is packaging format: SMBJ40CA-E3/52 is supplied in Cut Tape format while SMBJ40CA-M3/5B is Tape & Reel. Verify your assembly equipment compatibility with the packaging format.

Q: What is the difference between SMBJ40CD-M3/I and SMBJ40CA-M3/5B?

A: Both are Vishay TransZorb® devices with 40V reverse standoff voltage. SMBJ40CD-M3/I has slightly different clamping voltage (63.6V vs. 64.5V) and peak pulse current (9.43A vs. 9.3A). These variations fall within normal device tolerance ranges for the SMBJ40 base product family.

Q: Can I use SMBJ43CA or SMBJ45CA as substitutes?

A: These parts have higher reverse standoff voltages (43V and 45V) and higher clamping voltages (69.4V and 72.7V respectively). They are electrically different from the 40V rated SMBJ40CA-M3/5B. Use only if your circuit design permits operation at these higher voltage ratings.

Q: Is ATV06B400JB-HF suitable for automotive applications?

A: Yes. ATV06B400JB-HF carries AEC-Q101 automotive qualification and is electrically equivalent to SMBJ40CA-M3/5B. It is suitable for automotive-grade applications requiring qualified components.

Q: What does the packaging designation mean (TR vs. CT)?

A: TR (Tape & Reel) is continuous reel packaging for automated assembly. CT (Cut Tape) is individual tape segments. Verify your assembly equipment specifications before selecting packaging format.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the original SMBJ40CA-M3/5B specifications.

Q: What is the operating temperature range difference between parts?

A: Most substitutes operate from -55°C to 150°C (TJ), matching SMBJ40CA-M3/5B. MDD-manufactured parts (SMBJ40CA, SMBJ43CA, SMBJ45CA) operate from -50°C to 150°C. Verify your application temperature requirements before selection.

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