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Product Detailed Parameters
- Description：DIODE ZENER 4.3V 200MW SOD323
- Series：*
- Mfr：onsemi
- Package：Bulk
- Configuration：-
- Voltage - Zener (Nom) (Vz)：-
- Tolerance：-
- Power - Max：-
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-
- Grade：-
- Qualification：-
- Mounting Type：-
- pa_package-case：
- Supplier Device Package：-
- Voltage - Forward (Vf) (Max) @ If：-
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Overview
The SZMM3Z4V3T1 is a single Zener diode manufactured by onsemi, designed for surface-mount applications in the SOD-323 package. It features a nominal Zener voltage of 4.3 V with a tight tolerance of 2%. The device operates within a power dissipation rating of 300 mW and maintains a maximum reverse leakage current of 3 uA at a test current of 5 mA. Its Zener impedance is specified at 90 Ohms. The component supports an extended operating temperature range from -65°C to +150°C and holds AEC-Q101 qualification for automotive reliability.
Feature Summary
- High precision voltage regulation with 2% tolerance
- Automotive-grade reliability via AEC-Q101 qualification
- Compact SOD-323 footprint for space-constrained designs
- Extended thermal stability up to 150°C
Applications
- Voltage reference circuits in automotive electronics
- Overvoltage protection for sensitive signal lines
- Clamping applications in high-density PCB layouts
Procurement Notes
Verify the specific ordering suffix against the official datasheet to ensure correct packaging and tolerance specifications. Confirm that the AEC-Q101 qualification status aligns with project requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.
Selection Notes
Select this component when a precise 4.3 V reference is required in a compact SMD form factor. The 2% tolerance makes it suitable for applications demanding tighter voltage accuracy than standard 5% devices. Ensure the design accounts for the 300 mW power dissipation limit and the specific thermal characteristics of the SOD-323 package under expected operating conditions.
Part Context
This part belongs to the MM3Z series of Zener diodes from onsemi, which are engineered for general-purpose voltage regulation in small packages. The SZ prefix typically denotes specific automotive or enhanced specification variants within the broader MM3Z family, distinguishing it from standard commercial grade parts like the MM3Z4V3C.
Replacement Considerations
The MM3Z4V3C is a related part but differs in power rating (200 mW vs 300 mW) and tolerance (5% vs 2%). Substitution requires verification of thermal performance and voltage accuracy constraints. No other direct equivalent substitutes are confirmed in the provided documentation.
