Equivalent & Substitute Parts for SMBJ4742/TR13 Zener Diode

Part Overview

SMBJ4742/TR13 from Microchip Technology is a surface-mount Zener diode rated at 12 V, 2 W with ±10% voltage tolerance in a DO-214AA (SMBJ) package. The part status is Active; however, alternative models may be required for compliance reasons (such as RoHS), different supply formats, or higher tolerance requirements within the same product category.

Key Parameters

Parameter	Main Part Value
Voltage - Zener (Nom) (Vz)	12 V
Tolerance	±10%
Power - Max	2 W
Impedance (Max) (Zzt)	9 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 9.1 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
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts are selected strictly according to the following allowed parameters: Zener voltage (nominal value), voltage tolerance, power rating, impedance, reverse leakage current, forward voltage, operating temperature range, mounting type, packaging/case, RoHS status, MSL, REACH status, ECCN, and HTSUS code. Only parts matching these parameters are included for direct substitution within the Diodes, Zener category and the SMB (DO-214AA) package.

Parameter Comparison

Parameter	SMBJ4742/TR13 Microchip Technology	1SMB5927BT3G onsemi
Voltage - Zener (Nom) (Vz)	12 V	12 V
Tolerance	±10%	±5%
Power - Max	2 W	3 W
Impedance (Max) (Zzt)	9 Ohms	6.5 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 9.1 V	1 µA @ 9.1 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
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

1SMB5927BT3G from onsemi maintains active status and a matching Zener voltage, mounting type, and package. It offers ROHS3 compliance as opposed to RoHS non-compliance for SMBJ4742/TR13. Both parts hold MSL 1 (Unlimited) and REACH Unaffected status. For designs requiring RoHS-compliant Zener diodes or higher power ratings while retaining identical nominal voltage and form factor, 1SMB5927BT3G is a direct substitute.

Frequently Asked Questions (FAQ)

Q: Which key parameters must match for a Zener diode substitute in the DO-214AA (SMB) package?
A: Zener voltage (nominal), tolerance, power rating, mounting type, package/case, reverse current, forward voltage, and operating temperature.

Q: Does 1SMB5927BT3G provide compliance not available from SMBJ4742/TR13?
A: 1SMB5927BT3G is ROHS3 compliant, while SMBJ4742/TR13 is RoHS non-compliant.

Q: Are both diodes suitable for automatic surface-mount assembly?
A: Both parts use the DO-214AA (SMB) surface-mount package and MSL 1 (Unlimited).

Q: Is there any difference in power handling or tolerance?
A: 1SMB5927BT3G supports up to 3 W with ±5% tolerance, compared to 2 W and ±10% tolerance for SMBJ4742/TR13.

Q: Do substitute parts require any re-evaluation of temperature or environmental ratings?
A: Both devices specify an operating temperature range of -65°C ~ 150°C with REACH Unaffected status.

Q: Are there any differences regarding international trade compliance?
A: Both parts have ECCN EAR99 and HTSUS 8541.10.0050.

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