SMBJ5943C/TR13 Equivalent & Substitute Parts Reference

Part Overview

SMBJ5943C/TR13 by Microchip Technology is a Zener diode categorized under Diodes, Zener, with Tape & Reel (TR) packaging. It features a nominal Zener voltage of 56 V, maximum power of 2 W, and ±2% tolerance, housed in a surface mount DO-214AA, SMBJ package. The part is Active with 754 pieces available as New Original In Stock. Seeking alternative models is required for inventory management, design flexibility, or to address differences in compliance such as RoHS status or automotive qualification.

Key Parameters

Parameter	SMBJ5943C/TR13	SZ1SMB5943BT3G
Manufacturer	Microchip Technology	onsemi
Category	Diodes, Zener	Diodes, Zener
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
Voltage - Zener (Nom) (Vz)	56 V	56 V
Tolerance	±2%	±5%
Power - Max	2 W	3 W
Impedance (Max) (Zzt)	86 Ohms	86 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 42.6 V	1 µA @ 42.6 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	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
Product Status	Active	Active
Inventory	754 Pcs	2800 Pcs
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Substitute Part Grouping Explanation

Substitution is determined strictly by matching the Zener diode’s nominal voltage, package/case, mounting type, reverse leakage current, impedance, and operating temperature range. Tolerance and maximum power ratings allow grouping for broader compatibility, provided they do not conflict with application requirements. RoHS status and automotive qualification are considered for regulatory and market-specific selection.

Key parameters:

Voltage - Zener (Nom) (Vz)
Package / Case
Mounting Type
Impedance (Max) (Zzt)
Current - Reverse Leakage @ Vr
Operating Temperature
Product Status
Compliance (RoHS, REACH, MSL)
Inventory

Parameter Comparison

Parameter	SMBJ5943C/TR13	SZ1SMB5943BT3G
Manufacturer	Microchip Technology	onsemi
Category	Diodes, Zener	Diodes, Zener
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
Voltage - Zener (Nom) (Vz)	56 V	56 V
Tolerance	±2%	±5%
Power - Max	2 W	3 W
Impedance (Max) (Zzt)	86 Ohms	86 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 42.6 V	1 µA @ 42.6 V
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB
Product Status	Active	Active
Inventory	754 Pcs	2800 Pcs
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

Selection between SMBJ5943C/TR13 and SZ1SMB5943BT3G can be based on product status, regulatory compliance, and inventory. Both parts are active and in stock. SZ1SMB5943BT3G provides ROHS3 compliance and AEC-Q101 automotive qualification, while SMBJ5943C/TR13 does not meet RoHS requirements. Moisture Sensitivity Level and REACH status are equivalent. For applications requiring strict environmental or automotive compliance, SZ1SMB5943BT3G is suitable within the provided parameters.

Frequently Asked Questions (FAQ)

Q1: Which key parameters must match for a Zener diode substitute?
A1: Zener voltage, package/case, mounting type, operating temperature, reverse leakage current, and impedance must correspond for substitution.

Q2: How does packaging affect compatibility?
A2: Both SMBJ5943C/TR13 and SZ1SMB5943BT3G use Tape & Reel (TR) packaging and DO-214AA, SMB case, supporting direct replacement in automated assembly.

Q3: Why is RoHS status significant for substitute selection?
A3: Regulatory requirements often mandate RoHS compliance. SZ1SMB5943BT3G provides ROHS3 compliance for markets or applications where necessary.

Q4: Is the difference in tolerance and power rating relevant for substitution?
A4: Substitution within this list includes devices with matching nominal voltage and compatible tolerances and power ratings provided by the manufacturer inputs.

Q5: What is the role of automotive qualification and AEC-Q101?
A5: For automotive or mission-critical use, parts like SZ1SMB5943BT3G with AEC-Q101 qualification are aligned with specific reliability and environmental standards.

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