Description
1N4747 20V Zener Voltage Regulator Diode
Product Overview
The 1N4747 is a high-performance, 1-watt Zener diode designed to provide a stable, fixed reference voltage of 20V. It is a critical component for power supply regulation, overvoltage protection, and voltage level shifting in electronic circuits. By operating in the Zener breakdown region, it ensures that voltage levels remain clamped at the 20V threshold, shielding sensitive downstream electronics from transient surges and supply fluctuations.
Housed in a robust DO-41 axial-lead package, the 1N4747 offers excellent thermal dissipation and long-term reliability. It is a staple component for engineers working on industrial control systems, automotive electronics, and precision instrumentation where a stable 20V rail is required.
Key Features
-
Precision 20V Regulation: Specifically calibrated for a nominal Zener voltage of 20V, providing a dependable voltage benchmark for high-voltage logic and analog biasing.
-
1W Power Dissipation: Engineered to handle up to 1 watt of power, providing the necessary thermal headroom for sustained regulation tasks without degradation.
-
Sharp Breakdown Characteristic: Offers a tight transition into regulation, which minimizes voltage ripple and ensures a clean, steady output across varying load conditions.
-
Rugged Construction: The DO-41 glass-passivated axial package is designed for endurance, resisting moisture and thermal cycling in professional-grade assemblies.
-
Ease of Assembly: Standard axial-lead design simplifies integration into both prototyping breadboards and permanent through-hole PCB designs.
Technical Specifications
| Parameter | Specification |
| Component Type | Zener Voltage Regulator Diode |
| Nominal Zener Voltage ($V_Z$) | 20V |
| Power Dissipation ($P_D$) | 1W |
| Test Current ($I_{ZT}$) | 12.5mA |
| Package Type | DO-41 (Axial Lead) |
| Operating Temperature | -65°C to +200°C |
Applications
The go-to solution for 20V rail stabilization and transient suppression:
-
Voltage Regulation: Ideal for creating stable 20V power rails for industrial sensors, precision op-amps, and specialized instrumentation.
-
Overvoltage Protection: Functions as a shunt regulator to “clamp” transient voltage spikes and protect sensitive components on 20V supply lines.
-
Signal Conditioning: Useful for clamping or shifting signal levels in higher-voltage control systems and automation interfaces.
-
Voltage Referencing: Serves as a reliable 20V reference for analog-to-digital conversion and high-side driver circuitry.
Reviews
There are no reviews yet.