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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 33V SOT-363
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Configuration：3 Independent
- Voltage - Zener (Nom) (Vz)：33 V
- Tolerance：±5%
- Power - Max：200 mW
- Impedance (Max) (Zzt)：58 Ohms
- Current - Reverse Leakage @ Vr：100 nA @ 25 V
- Operating Temperature：-65°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-363
- Voltage - Forward (Vf) (Max) @ If：900 mV @ 10 mA
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Overview
The CMKZ5257B BK is a surface mount triple isolated silicon Zener diode from the Central Semiconductor CMKZ5221B series, packaged in an ULTRAmini SOT-363 case. It contains three independent Zener diodes with a nominal voltage of 33V (range 31.35V to 34.65V) at a test current of 3.8mA. Each diode has a maximum power dissipation of 200mW and operates within a junction temperature range of -65°C to +150°C. The device features a maximum Zener impedance of 58Ω at IZT and 700Ω at IZK, with a reverse current of 0.1μA at 25V and a temperature coefficient of +0.092%/°C.
Feature Summary
- Triple isolated configuration providing three independent Zener diodes in a single compact package
- Designed for industrial, commercial, entertainment, and computer applications
- Surface mount construction utilizing the ULTRAmini SOT-363 case form factor
Applications
- Industrial circuit regulation
- Commercial electronic equipment
- Entertainment system components
- Computer hardware applications
Procurement Notes
This component is classified as End of Life (EOL). Availability is restricted to existing stock only; no new production orders are accepted. Verify specific lot availability directly with authorized distributors or Central Semiconductor before design finalization. Last purchase order deadlines may apply based on remaining inventory levels.
Selection Notes
Select this part when space-constrained designs require three isolated voltage references in a small footprint. Ensure the 33V nominal rating matches the target regulation requirement. Consider the positive temperature coefficient (+0.092%/°C) for thermal stability needs. Verify that the SOT-363 pinout aligns with the PCB layout constraints.
Part Context
The CMKZ5257B BK belongs to the CMKZ5221B through CMKZ5261B series of triple isolated silicon Zener diodes. This series offers various voltage options within the same SOT-363 package, allowing designers to standardize on a single footprint while selecting different voltage combinations for complex multi-rail supply requirements.
Replacement Considerations
No direct replacement part numbers are listed by the manufacturer. The datasheet indicates 'N/A, Stock Only' for all variants in the series. Designers must source alternative components from other manufacturers if new production is required.
