Equivalent & Substitute Parts for SMBJ4743/TR13 Zener Diode

Part Overview

The SMBJ4743/TR13 from Microchip Technology is an active Zener diode specified at 13 V nominal Zener voltage, 2 W maximum power dissipation, and ±10% tolerance. It is supplied in the DO-214AA, SMB surface mount package. As with all Diodes, Zener category parts, ensuring continuous supply and compliance may require identification of equivalent or substitute models. Substitution is necessary to address requirements involving supply chain resilience, changes in compliance (RoHS, REACH), or sourcing restrictions.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Packaging	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Product Status	RoHS Status	REACH Status	Moisture Sensitivity Level (MSL)	ECCN	HTSUS
SMBJ4743/TR13	Microchip Technology	Diodes, Zener	Tape & Reel (TR)	13 V	±10%	2 W	10 Ohms	5 µA @ 9.9 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	SMBJ (DO-214AA)	Active	RoHS non-compliant	REACH Unaffected	1 (Unlimited)	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts in the Diodes, Zener category must strictly match the following key parameters:

Voltage - Zener (Nom) (Vz): 13 V
Package / Case: DO-214AA, SMB (surface mount)
Product Status: Active

Additional allowance in substitution is based on equal or tighter tolerance, equal or higher power, and compatible controls for reverse leakage, Zener impedance, and voltage forward at rated current. Only models relevant by these parameters are listed.

Parameter Comparison

Parameter	SMBJ4743/TR13	CZRB5350B-HF	SZ1SMB5928BT3G
Manufacturer	Microchip Technology	Comchip Technology	onsemi
Category	Diodes, Zener	Diodes, Zener	Diodes, Zener
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Voltage - Zener (Nom) (Vz)	13 V	13 V	13 V
Tolerance	±10%	±5%	±5%
Power - Max	2 W	5 W	3 W
Impedance (Max) (Zzt)	10 Ohms	2.5 Ohms	7 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 9.9 V	1 µA @ 9.9 V	1 µA @ 9.9 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 150°C	-55°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
Product Status	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

The SMBJ4743/TR13 is RoHS non-compliant, whereas CZRB5350B-HF and SZ1SMB5928BT3G are ROHS3 Compliant. All parts have the same Zener voltage and surface mount SMB package, with active product status and unlimited moisture sensitivity levels (MSL 1). All models are REACH Unaffected and classified under ECCN EAR99.

For requirements requiring RoHS compliance, substitute parts CZRB5350B-HF and SZ1SMB5928BT3G match the voltage and package specification, and meet or exceed the original part’s tolerance and power ratings. Both substitutes are suitable within the defined engineering parameters for Zener diode equivalence.

Frequently Asked Questions (FAQ)

Q1: Which key parameters must match when selecting a Zener diode substitute?
A1: Substitution requires matching Zener voltage, package/case, mounting type, and ensuring active product status. Tolerance, power rating, and compatibility with operating temperature should also be considered.

Q2: Does the package type affect interchangeability?
A2: Yes. All listed parts use DO-214AA, SMB surface mount package, which is essential for physical and electrical compatibility.

Q3: Are substitute parts compliant with RoHS and REACH requirements?
A3: CZRB5350B-HF and SZ1SMB5928BT3G are ROHS3 Compliant and REACH Unaffected.

Q4: Can higher power or lower tolerance substitutes be used?
A4: Substitutes with higher power ratings or tighter tolerances can be selected, provided all other critical parameters match.

Q5: What is the moisture sensitivity level significance in selection?
A5: All parts listed have MSL 1 (Unlimited), ensuring no special handling or storage requirements are needed for surface mount assembly.

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