Equivalent & Substitute Parts for SMBJ4745/TR13

Part Overview

SMBJ4745/TR13 is a Zener diode developed by Microchip Technology, specified for a nominal Zener voltage of 16 V, a maximum power dissipation of 2 W, and a ±10% tolerance. Provided in the SMBJ (DO-214AA) surface mount package, it is intended for voltage regulation and protection applications. The part is currently active with available inventory but is RoHS non-compliant. Sourcing alternative models is necessary due to regulatory, supply chain, or compliance considerations.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	16 V
Tolerance	±10%
Power - Max	2 W
Impedance (Max) (Zzt)	16 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 12.2 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
MSL	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0050

Substitute Part Grouping Explanation

Substitution for Zener diodes in the same category is determined strictly by matching the following parameters:

Nominal Zener voltage (Vz)
Tolerance
Maximum power dissipation
Maximum impedance (Zzt)
Maximum reverse leakage current at specified voltage
Maximum forward voltage at specified current
Operating temperature range
Surface mount compatibility and matching package (DO-214AA, SMB or equivalent)
Compliance and regulatory status
Only parts matching or exceeding these specifications in the same surface mount package are grouped as valid substitutes.

Parameter Comparison

Parameter	Main Part: SMBJ4745/TR13 (Microchip Technology)	Substitute: 1SMB5930BT3G (onsemi)
Voltage - Zener (Nom) (Vz)	16 V	16 V
Tolerance	±10%	±5%
Power - Max	2 W	3 W
Impedance (Max) (Zzt)	16 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 12.2 V	1 µA @ 12.2 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.5 V @ 200 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
MSL	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

Both SMBJ4745/TR13 and 1SMB5930BT3G are active and available with unrestricted inventory. 1SMB5930BT3G offers ROHS3 compliance and matches or surpasses all listed technical parameters. The main part, SMBJ4745/TR13, is RoHS non-compliant. For applications requiring RoHS conformance, 1SMB5930BT3G is suitable based on its certification. MSL and REACH status are equivalent for both options. ECCN and HTSUS designations are also identical.

Frequently Asked Questions (FAQ)

Q1: Which parameters are required for direct substitution in this Zener diode category?
A1: Nominal Zener voltage, tolerance, power rating, impedance, reverse leakage current, forward voltage, temperature range, mounting type, and package must strictly match or exceed the original part's specifications.

Q2: Are SMBJ4745/TR13 and 1SMB5930BT3G package compatible?
A2: Both are supplied in a DO-214AA, SMB surface-mount package, ensuring mechanical and board assembly compatibility.

Q3: Is there any difference in environmental or compliance status?
A3: SMBJ4745/TR13 is RoHS non-compliant, while 1SMB5930BT3G is ROHS3 compliant. Both parts are REACH unaffected.

Q4: Do both parts have the same moisture sensitivity level (MSL)?
A4: Both diodes are rated MSL 1 (Unlimited), permitting standard handling and storage.

Q5: Is the substitute part’s performance within allowed specifications?
A5: 1SMB5930BT3G matches or exceeds all provided electrical and mechanical parameters relative to SMBJ4745/TR13.

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