Equivalent & Substitute Parts for SMBJ5940CE3/TR13 (Microchip Technology)

Part Overview

SMBJ5940CE3/TR13 is a Zener Diode manufactured by Microchip Technology, categorized under Diodes, Zener. It features a nominal Zener voltage of 43 V, a maximum power dissipation of 2 W, a tolerance of ±2%, and is provided in a DO-214AA (SMBJ) surface-mount package. With ROHS3 compliance and REACH unaffected status, it is currently active and available in tape & reel packaging.

Sourcing alternative models becomes necessary due to supply chain variability, inventory availability, or specific application requirements. Equivalent and substitute models must match key electrical and mechanical parameters to ensure function and full compatibility in circuit design.

Key Parameters

Parameter	Main Part	Allowed Substitution Criteria
Voltage - Zener (Nom) (Vz)	43 V	Match
Tolerance	±2%	Match or Lower Precision Accepted
Power - Max	2 W	Match or Higher
Impedance (Max) (Zzt)	53 Ohms	Match
Current - Reverse Leakage @ Vr	1 µA @ 32.7 V	Match
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	Match or Higher
Operating Temperature	-65°C ~ 150°C	Match
Mounting Type	Surface Mount	Match
Package / Case	DO-214AA, SMB	Match
RoHS Status	ROHS3 Compliant	Match
REACH Status	REACH Unaffected	Match
Product Status	Active	Match

Substitute Part Grouping Explanation

Substitution in the Zener Diode category is determined strictly by matching the following electrical and mechanical parameters: nominal Zener voltage, maximum power rating, device tolerance, maximum impedance, reverse leakage current, forward voltage at defined current, operating temperature range, mounting type, package/case, RoHS and REACH compliance, and product status. All listed substitute parts conform to these key attributes, allowing safe and effective replacement in applications where the SMBJ5940CE3/TR13 is specified.

Parameter Comparison

Parameter	SMBJ5940CE3/TR13 (Microchip Technology)	1SMB5940BT3G (onsemi)	SZ1SMB5940BT3G (onsemi)
Voltage - Zener (Nom) (Vz)	43 V	43 V	43 V
Tolerance	±2%	±5%	±5%
Power - Max	2 W	3 W	3 W
Impedance (Max) (Zzt)	53 Ohms	53 Ohms	53 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 32.7 V	1 µA @ 32.7 V	1 µA @ 32.7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed (1SMB5940BT3G, SZ1SMB5940BT3G) are actively available, ROHS3 compliant, and REACH unaffected, satisfying environmental and regulatory requirements. Each part is supplied in an identical surface-mount DO-214AA (SMB) package and suitable for production environments with unlimited moisture sensitivity level (MSL 1). For automotive grade or AEC-Q101 qualification, SZ1SMB5940BT3G matches the criteria. Selection may be made strictly on the basis of product status and compliance data.

Frequently Asked Questions (FAQ)

Q1: What are the most critical parameters for substituting SMBJ5940CE3/TR13 in the Zener Diode category?
Matching nominal Zener voltage, power rating, device tolerance, package type, operating temperature, and compliance status are essential to ensure compatibility.

Q2: Does a higher power rating (such as 3 W) present any compatibility issues when replacing a 2 W device?
Based on provided parameters, substituting with a higher power-rated device is allowable and within the allowed substitution criteria.

Q3: Is a tolerance change from ±2% to ±5% significant for substitution?
A device with a ±5% tolerance is accepted under the provided criteria, but performance variation may result according to application requirements.

Q4: Are all substitute parts in the same mechanical package?
Yes, all listed substitutes are in the DO-214AA, SMB surface-mount package.

Q5: What are the compliance standards for the listed substitute Zener diodes?
All substitute parts are ROHS3 compliant, REACH unaffected, and product status is active.

Q6: Is automotive-grade qualification available in substitute options?
Yes, SZ1SMB5940BT3G includes automotive-grade specification and AEC-Q101 qualification according to the input data.

Q7: Are the reverse leakage current and impedance identical in substitute parts?
Yes, substitute parts match the maximum impedance and reverse leakage current at specified test conditions.

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