1N5368B DIODE ZENER 47V 5W
The 1N5368B is a rugged, axial-leaded silicon Zener diode specified for a nominal Zener voltage of 47 V and a rated power dissipation of 5 W. Supplied in a DO-201AD molded plastic case, it’s built for applications requiring a stable reference or clamp at relatively high Zener voltages while withstanding substantial reverse power during transients. The device family covers a wide voltage range (5.1–200 V), and the 1N5368B is positioned toward the higher-voltage, medium-power end of that series.
Mechanically the diode features plated, solderable leads and a compact DO-201AD body, with thermal derating behavior shown for various lead-to-heatsink conditions in the datasheet. The part is designed for reliable thermal performance when mounted appropriately (lead length and heat-sink practices affect the allowable dissipation), and the datasheet gives thermal resistance and derating curves to help designers maintain safe junction temperatures.
Electrically the 1N5368B provides a predictable 47 V clamp/reference at the specified test current, with conservative impedance and leakage characteristics chosen to maintain voltage stability under load. Its limits on forward voltage, reverse leakage and storage/junction temperatures reflect a design aimed at long life and low leakage in high-voltage biasing, regulation, and protection roles. The datasheet emphasizes low leakage, high peak reverse dissipation capability and broad operating temperature range for dependable service.
Features:
- Rated Zener voltage: 47 V (nominal).
- Power dissipation: 5.0 W (at specified lead/heat conditions).
- Axial lead, DO-201AD molded plastic case; plated, solderable leads.
- Low leakage current and low Zener impedance at test current.
- High peak reverse power dissipation capability.
- Wide nominal voltage coverage across the series (5.1–200 V).
- Robust junction and storage temperature range (−65 to +200 °C).
- Marked part number and polarity indicated by cathode band.
Specifications:
| Parameter | Value |
|---|---|
| Nominal Zener voltage (VZ): | 47 V. |
| Test Zener current (IZT): | 25 mA. |
| Zener impedance (ZZT) @ IZT: | 25 Ω. |
| Zener impedance (ZZK) @ IZK: | 210 Ω. |
| IZK (knee test current): | 1.0 mA. |
| Reverse leakage IR @ VR: | 0.5 μA (typ./max as listed). |
| VR (test voltage shown in table): | 35.8 V (table entry associated with the 47 V line). |
| Maximum DC Zener current (IZM): | 100 mA. |
| DC power dissipation (PD): | 5.0 W (at specified lead/heat conditions). |
| Maximum forward voltage (VF) at IF = 1 A: | 1.2 V. |
| Thermal resistance, RθJA: | 45 °C/W (typical condition shown). |
| Junction temperature range (Tj): | −65 to +200 °C. |
| Case / Package: | DO-201AD, molded plastic. |
| Weight: | 1.2 g . |
Pinout Diagram:
Footprint:
Applications:
- Voltage regulation / reference.
- Transient suppression / surge protection.
- Voltage clipping and waveform shaping.
- Bias stabilization for circuits.
- High-voltage power supply auxiliary circuits.
Package Contents:
- 1x 1N5368B DIODE ZENER 47V 5W
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