Equivalent & Substitute Parts for SMBJ5940A/TR13

Part Overview

The SMBJ5940A/TR13 from Microchip Technology is a surface mount Zener diode rated at 43 V and 2 W, with ±10% voltage tolerance, and housed in the DO-214AA (SMBJ) package. This device is used for voltage regulation and protection in electronic circuits. It is currently active, but requirements such as RoHS compliance or specific sourcing needs may require identifying substitute parts. Engineers often need equivalent or alternate models with matching electrical and mechanical parameters to ensure uninterrupted design, manufacturing, or compliance workflows.

Key Parameters

Parameter	SMBJ5940A/TR13 Value
Manufacturer	Microchip Technology
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	43 V
Tolerance	±10%
Power - Max	2 W
Impedance (Max) (Zzt)	53 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 32.7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
Supplier Device Package	SMBJ (DO-214AA)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution adheres strictly to identical core electrical characteristics and mechanical form factor. The substitute Zener diodes listed match the main part in the following key parameters: Zener voltage (43 V), mechanical package (DO-214AA, SMB), mounting type (Surface Mount), Zener impedance (53 Ohms), and reverse leakage (1 µA @ 32.7 V). Differences in power rating and tolerance fall within allowable category standards. All substitutes have the same or higher power rating, tighter tolerance, and compatible forward voltage ratings. Only provided specifications are considered.

Parameter Comparison

Parameter	SMBJ5940A/TR13 Microchip Technology	1SMB5940BT3G onsemi	SZ1SMB5940BT3G onsemi
Voltage - Zener (Nom) (Vz)	43 V	43 V	43 V
Tolerance	±10%	±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	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

SMBJ5940A/TR13 is active but RoHS non-compliant. Substitute parts 1SMB5940BT3G and SZ1SMB5940BT3G are active, ROHS3 compliant, and REACH unaffected. Selection can be based on compliance requirements, without compromise in core Zener diode electrical or mechanical parameters.

Frequently Asked Questions (FAQ)

Q: What are the main substitution criteria for a Zener diode in this category?
A: The main criteria are Zener voltage, package type, mounting style, power dissipation, impedance, and reverse leakage current. All listed substitutes match or exceed these parameters.

Q: Are the substitute parts mechanically compatible with SMBJ5940A/TR13?
A: Substitute parts use the DO-214AA (SMB) package and are surface mount type, ensuring mechanical compatibility.

Q: Is there a difference in regulatory compliance among these Zener diode options?
A: SMBJ5940A/TR13 is RoHS non-compliant. Both 1SMB5940BT3G and SZ1SMB5940BT3G are ROHS3 compliant.

Q: Can the substitute diodes be used over the same temperature range?
A: All parts have an operating temperature range of -65°C to 150°C.

Q: Which parameter variations exist among substitutes?
A: The substitutes offer higher power rating (3 W vs. 2 W) and tighter voltage tolerance (±5% vs. ±10%). The forward voltage rating is slightly higher for the substitutes (1.5 V vs. 1.2 V at 200 mA).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message