Equivalent & Substitute Parts for SMBJ5934A/TR13 Zener Diode

Part Overview

SMBJ5934A/TR13, manufactured by Microchip Technology, is a 24 V, 2 W Zener diode in a surface-mount DO-214AA (SMBJ) package. It features ±10% tolerance, a maximum Zener impedance of 19 ohms, reverse leakage of 1 µA @ 18.2 V, and a forward voltage of 1.2 V @ 200 mA. The part is RoHS non-compliant and operates from -65°C to 150°C. It is currently active with available inventory. Identifying equivalent and substitute Zener diodes with matching key parameters is necessary for alternative sourcing in cases such as stock limitation, compliance requirements, or supply chain preferences.

Key Parameters

Parameter	SMBJ5934A/TR13
Voltage - Zener (Nom) (Vz)	24 V
Tolerance	±10%
Power - Max	2 W
Impedance (Max) (Zzt)	19 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 18.2 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 logic for the SMBJ5934A/TR13 Zener Diode is based solely on the explicitly provided electrical, mechanical, and certification parameters. Compatible substitute parts must meet the following criteria:

Nominal Zener voltage: 24 V
Package / Case: DO-214AA, SMB (Surface Mount)
Zener impedance: 19 Ohms maximum
Reverse leakage current: 1 µA @ 18.2 V
Power dissipation: Minimum of 2 W
Forward voltage at test current: Maximum values provided
Operating temperature: Must encompass -65°C ~ 150°C
RoHS, REACH, and MSL status as per inventory or compliance preferences
Product status: Active

Provided substitute parts meet all mechanical and electrical compatibility bounds as defined above.

Parameter Comparison

Parameter	SMBJ5934A/TR13 (Microchip)	SMBZ5934B-E3/5B (Vishay)	SZ1SMB5934BT3G (onsemi)
Voltage - Zener (Nom) (Vz)	24 V	24 V	24 V
Tolerance	±10%	±5%	±5%
Power - Max	2 W	3 W	3 W
Impedance (Max) (Zzt)	19 Ohms	19 Ohms	19 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 18.2 V	1 µA @ 18.2 V	1 µA @ 18.2 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	-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
Supplier Device Package	SMBJ (DO-214AA)	DO-214AA (SMBJ)	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

SMBJ5934A/TR13, SMBZ5934B-E3/5B, and SZ1SMB5934BT3G are all classified as active components and available in inventory.
Substitute parts SMBZ5934B-E3/5B and SZ1SMB5934BT3G are ROHS3 Compliant and MSL 1 (Unlimited).
The main part, SMBJ5934A/TR13, is RoHS non-compliant; select substitutes for RoHS compliance as required by environmental standards.
All parts have REACH Unaffected status, providing broad compatibility regarding chemicals management.
All supplier device packages and mounting types match; package interchangeability is maintained.

Frequently Asked Questions (FAQ)

Q1: What key parameters are required for substituting Zener diodes in DO-214AA, SMB packages?
A1: Substitution requires matching Zener voltage, power rating, maximum Zener impedance, reverse leakage, forward voltage at test current, package/case, and mounting type.

Q2: Are SMBZ5934B-E3/5B and SZ1SMB5934BT3G compatible replacements for SMBJ5934A/TR13 in the same PCB footprint?
A2: Yes, all use the DO-214AA, SMB surface-mount package, supporting drop-in replacement for mechanical and PCB compatibility.

Q3: How do tolerance and power ratings impact interchangeability?
A3: Tolerance and power rating define voltage regulation precision and maximum power dissipation; the substitute parts maintain equal or improved specifications within allowed bounds.

Q4: What compliance standards differ across these parts?
A4: SMBZ5934B-E3/5B and SZ1SMB5934BT3G are ROHS3 Compliant; SMBJ5934A/TR13 is RoHS non-compliant. All are REACH unaffected.

Q5: Do any substitutes offer improved power rating?
A5: SMBZ5934B-E3/5B and SZ1SMB5934BT3G both provide 3 W maximum power compared to the 2 W of SMBJ5934A/TR13.

Q6: What considerations apply for supply chain or regulatory agency requirements?
A6: Selection should be based on RoHS and REACH status per organizational or market requirements; all are classified as active and available.

Q7: Can these diodes be used interchangeably in the same thermal and voltage environment?
A7: All listed diodes share a compatible operating temperature range and electrical parameters, as explicitly specified.

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