SMBJ5938A/TR13 Equivalent & Substitute Parts Reference

Part Overview

SMBJ5938A/TR13 from Microchip Technology is a surface-mount Zener diode with a nominal Zener voltage of 36 V, maximum power dissipation of 2 W, and ±10% voltage tolerance, supplied in the DO-214AA (SMBJ) package. The component is classified as "Active." Alternate models are necessary for supply-chain risk mitigation, production flexibility, or compliance requirements.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Vz)	Tolerance	Power - Max	Impedance (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Product Status	RoHS Status	MSL
SMBJ5938A/TR13	Microchip Technology	Diodes, Zener	36 V	±10%	2 W	38 Ohms	1 µA @ 27.4 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	Active	RoHS non-compliant	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute Zener diodes are included solely when their key substitutable attributes match or exceed the parameters of SMBJ5938A/TR13. Parameters used for determination are: Zener Voltage (V_z), Tolerance, Power Rating, Maximum Impedance (Z_zt), Reverse Leakage Current at test voltage, Forward Voltage at test current, Operating Temperature Range, Mounting Type, and Package/Case.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Zener (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Product Status	RoHS Status	MSL
SMBJ5938A/TR13	Microchip Technology	36 V	±10%	2 W	38 Ohms	1 µA @ 27.4 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	Active	RoHS non-compliant	1 (Unlimited)
1SMB5938BT3G	onsemi	36 V	±5%	3 W	38 Ohms	1 µA @ 27.4 V	1.5 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	Active	ROHS3 Compliant	1 (Unlimited)
SZ1SMB5938BT3G	onsemi	36 V	±5%	3 W	38 Ohms	1 µA @ 27.4 V	1.5 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	Active	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

All substitute Zener diodes listed (1SMB5938BT3G and SZ1SMB5938BT3G) have an active product status and are RoHS compliant. Main part SMBJ5938A/TR13 is RoHS non-compliant. Substitutes offer equivalent or tighter tolerance, higher power rating, and the same temperature/impedance ratings in identical package formats.

Frequently Asked Questions (FAQ)

Q: How is substitute compatibility determined for Zener diodes in the DO-214AA (SMB) package?
A: Compatibility is based on identical Zener voltage, equal or smaller tolerance, equal or greater power dissipation, matching or lower impedance, equivalent maximum reverse leakage current, similar forward voltage at test current, full operating temperature overlap, and same surface-mount package.

Q: Are these substitute diodes direct pin-for-pin equivalents?
A: All devices listed share industry-standard DO-214AA (SMB) footprints and surface-mount compatibility.

Q: What are the main differences between SMBJ5938A/TR13 and its substitutes?
A: Substitute parts listed provide a tighter voltage tolerance, higher maximum power rating, and RoHS compliance while retaining all other critical electrical and mechanical parameters.

Q: Does changing to a substitute affect RoHS or REACH compliance?
A: Substitute parts are ROHS3 Compliant and REACH Unaffected, whereas the main part is RoHS non-compliant.

Q: Can these substitute parts be used in automotive applications?
A: SZ1SMB5938BT3G is specified as AEC-Q101 qualified and automotive grade. All key parameters relevant to substitution have been matched per provided data.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message