SMBJ5370C/TR13 Equivalent & Substitute Zener Diodes Reference

Part Overview

The SMBJ5370C/TR13 from Microchip Technology is a surface-mount Zener diode designed for voltage regulation applications, specifically providing a nominal Zener voltage of 56 V with a maximum power dissipation of 5 W and ±2% tolerance. The product is in active status, and RoHS non-compliance may necessitate substitution in certain regulated environments. It is often necessary to find compatible alternative models when requirements for RoHS compliance, inventory availability, or specific electrical characteristics dictate a change.

Key Parameters

Parameter	SMBJ5370C/TR13
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	56 V
Tolerance	±2%
Power - Max	5 W
Impedance (Max) (Zzt)	35 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 40.3 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A
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 grouping is performed strictly based on the following allowed parameters: nominal Zener voltage, device category, surface-mount packaging (DO-214AA, SMB), tolerances, power rating, and other electrical limits specified (impedance, leakage current, forward voltage). Electrical and mechanical compatibility, as well as compliance attributes such as RoHS status and MSL rating, are also considered. Only substitute Zener diodes in the same SMB package, with comparable voltage, tolerance, and power characteristics, are included.

Parameter Comparison

Parameter	SMBJ5370C/TR13 (Microchip)	SZ1SMB5943BT3G (onsemi)
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	56 V	56 V
Tolerance	±2%	±5%
Power - Max	5 W	3 W
Impedance (Max) (Zzt)	35 Ohms	86 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 40.3 V	1 µA @ 42.6 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB
Supplier Device Package	SMBJ (DO-214AA)	SMB
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

Selection should be based on the combination of product status (Active), RoHS compliance requirements, and packaging form (Tape & Reel; DO-214AA, SMB). SZ1SMB5943BT3G offers ROHS3 compliance and AEC-Q101 qualification. Both parts provide MSL 1 for unlimited floor life and are suitable for surface mount in SMB packages. Choose the substitute based on documented compliance requirements and immediate inventory needs.

Frequently Asked Questions (FAQ)

Q1: What are the primary electrical criteria for Zener diode substitution in this category?
A1: The key criteria are nominal Zener voltage, power rating, tolerance, impedance, leakage current, forward voltage, and consistent packaging (DO-214AA, SMB).

Q2: Are the SMBJ5370C/TR13 and SZ1SMB5943BT3G mechanically interchangeable?
A2: Both are supplied in the SMB (DO-214AA) surface-mount package, ensuring mechanical compatibility.

Q3: Does RoHS compliance affect substitute selection?
A3: Yes, SZ1SMB5943BT3G is ROHS3 compliant, whereas SMBJ5370C/TR13 is RoHS non-compliant. Select based on required regulatory compliance.

Q4: Is there any difference in moisture sensitivity level between these Zener diodes?
A4: Both diodes have Moisture Sensitivity Level (MSL) 1, indicating unlimited floor life.

Q5: Can substitute parts operate in the same temperature range?
A5: Both parts are specified for operation from -65°C to 150°C.

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