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1N4737A TR TIN/LEAD
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Product Detailed Parameters
- Description：7.5V 1W TH DIODE-ZENER SINGLE: S
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：7.5 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：4 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 5 V
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Central Semiconductor Corp 1N4737A TR TIN/LEAD is a hermetically sealed, unidirectional silicon Zener diode housed in the DO-41 glass axial leaded package. It provides a nominal reference voltage of 7.5 V with a maximum tolerance of 5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range from -65 °C to +200 °C. Key electrical characteristics include a maximum dynamic impedance of 4 Ω at a test current of 34 mA and a maximum reverse leakage current of 10 μA.
Feature Summary
- Hermetically sealed construction utilizing metallurgically bonded double slug type design for environmental stability
- Oxide passivated die structure integrated within a glass encapsulated body
- Axial leads configured for through-hole mounting with polarity indicated by a color band denoting the cathode
Applications
- Voltage regulation circuits requiring stable reference levels
- Overvoltage protection for sensitive electronic components
- Clamping applications in signal processing paths
Procurement Notes
Verify that the specific ordering suffix corresponds to the tin/lead plating finish rather than lead-free alternatives. Confirm the hermetic seal integrity requirements align with the application environment. Ensure the DO-41 package dimensions match the target PCB footprint. Validate that the 1 W power rating is sufficient for the expected thermal conditions.
Selection Notes
Select this component when a hermetically sealed glass package is required for high reliability or harsh environments. The 7.5 V nominal voltage and 5% tolerance suit standard regulation needs. Consider the 200 °C maximum operating temperature for high-heat applications. Verify compatibility with existing assembly processes regarding the tin/lead termination finish.
Part Context
This part belongs to the 1N47 series of one-watt Zener voltage regulator diodes. The series offers a wide selection of voltage values ranging from 3.3 to 100 volts. The 1N4737A variant specifically targets the 7.5 V regulation segment within this established family of discrete semiconductor devices.
Replacement Considerations
Cross-reference with other manufacturers' 1N4737A parts in the DO-41 package. Verify equivalent electrical parameters such as voltage tolerance, impedance, and power dissipation. Ensure hermetic sealing specifications match if environmental resistance is critical.
