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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 20V SOT-23-3
- Series：MMBZxxxALT1G
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：20 V
- Tolerance：±5%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：50 nA @ 17 V
- Operating Temperature：-55°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3 (TO-236)
- Voltage - Forward (Vf) (Max) @ If：900 mV @ 10 mA
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Overview
The MMBZ20VALT1G is a dual monolithic silicon Zener diode in an SOT-23 package, designed for transient overvoltage and ESD protection. It features a common anode configuration allowing two separate unidirectional channels or one bidirectional channel within a single component. The device provides a nominal breakdown voltage of 20 V with a maximum clamping voltage of 28 V at a peak pulse current of 1.4 A. It handles a peak power dissipation of 40 W per junction under a 1.0 ms rectangular waveform. The unit operates within a temperature range of -55°C to +150°C and exhibits low leakage current.
Feature Summary
- Dual junction common anode design enables independent protection for two signal lines using a single surface-mount package.
- Capable of handling high-energy transients with a 40 W peak power rating per junction.
Applications
- Protection of I/O ports in computers and business machines
- ESD suppression on printer terminals and communication systems
- Voltage regulation and transient protection in medical equipment
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tolerance specifications. Confirm that the required electrical parameters align with the target application's transient requirements before finalizing procurement decisions.
Selection Notes
Select this component when board space is limited and dual-channel protection is required. Ensure the operating voltage remains below the working peak reverse voltage to prevent excessive leakage. Verify that the expected transient energy does not exceed the 40 W peak power limit defined by the specified pulse waveform.
Part Context
This part belongs to the MMBZxxxALT1G series of dual Zener diodes manufactured by onsemi. The series utilizes a standard SOT-23 (CASE 318) footprint, facilitating automated assembly and high-density PCB layouts while providing robust protection capabilities for sensitive electronic circuits.
Replacement Considerations
Direct replacements include other members of the MMBZxxxALT1G series with compatible breakdown voltages. Verify pinout compatibility and thermal characteristics when substituting with devices from different manufacturers.
