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1.5KE20CA from VISHAY

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1.5KE20CA

Manufacturer: VISHAY, LF, PEL, GS

GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR VOLTAGE-6.8 TO 440 Volts 1500 watt Peak Power / 6.5 Watt Steady State

Partnumber Manufacturer Quantity Availability
1.5KE20CA,15KE20CA VISHAY, LF, PEL, GS 6046 In Stock

Description and Introduction

GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR VOLTAGE-6.8 TO 440 Volts 1500 watt Peak Power / 6.5 Watt Steady State The part 15KE20CA is a Transient Voltage Suppressor (TVS) Diode manufactured by Vishay. It is designed to protect sensitive electronic components from voltage transients and surges. Key specifications include:

- **Peak Pulse Power (PPP):** 1500 W (10/1000 µs waveform)
- **Standoff Voltage (VWM):** 17.1 V
- **Breakdown Voltage (VBR):** 19.0 V (min), 21.1 V (max)
- **Clamping Voltage (VC):** 27.4 V at 23.2 A
- **Peak Pulse Current (IPP):** 23.2 A
- **Operating Temperature Range:** -55°C to +175°C
- **Package:** DO-201AD (DO-15)

This TVS diode is bidirectional, meaning it can protect against both positive and negative voltage transients. It is commonly used in applications such as automotive electronics, telecommunications, and industrial equipment.

Application Scenarios & Design Considerations

GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR VOLTAGE-6.8 TO 440 Volts 1500 watt Peak Power / 6.5 Watt Steady State# Technical Documentation: 15KE20CA TVS Diode

*Manufacturer: VISHAY*

## 1. Application Scenarios

### Typical Use Cases
The 15KE20CA is a bidirectional Transient Voltage Suppression (TVS) diode designed for robust overvoltage protection in electronic circuits. Typical applications include:

-  Power Supply Protection : Safeguarding DC power lines from voltage transients and surges
-  Communication Interfaces : Protecting RS-232, RS-485, and Ethernet ports from ESD events
-  Automotive Systems : Load dump protection and switching transient suppression in 12V/24V automotive networks
-  Industrial Control Systems : Motor drive circuits, relay contacts, and solenoid valve protection
-  Consumer Electronics : USB ports, audio/video inputs, and power input protection circuits

### Industry Applications
-  Automotive Electronics : ECU protection, infotainment systems, lighting controls
-  Telecommunications : Base station equipment, network switches, modem protection
-  Industrial Automation : PLC I/O modules, sensor interfaces, motor controllers
-  Power Electronics : Switching power supplies, inverter systems, battery management systems
-  Medical Equipment : Patient monitoring devices, diagnostic equipment power supplies

### Practical Advantages and Limitations

 Advantages: 
-  Fast Response Time : <1.0 ps typical response to transient events
-  High Surge Capability : 15kW peak pulse power dissipation (10/1000μs waveform)
-  Bidirectional Operation : Protects against both positive and negative voltage transients
-  Low Clamping Voltage : 32.5V maximum at 77.8A (typical clamping ratio)
-  Robust Construction : Axial lead package suitable for automated assembly

 Limitations: 
-  Standby Power Consumption : Minimal leakage current (5μA maximum) but present in circuit
-  Voltage Derating : Requires derating at elevated temperatures (>25°C)
-  Physical Size : Axial package may not be suitable for space-constrained designs
-  Frequency Limitations : Not optimal for high-frequency signal line protection above 100MHz

## 2. Design Considerations

### Common Design Pitfalls and Solutions

 Pitfall 1: Incorrect Voltage Rating Selection 
-  Problem : Selecting TVS with working voltage too close to normal operating voltage
-  Solution : Ensure VWM (20V) is 10-15% above maximum normal operating voltage

 Pitfall 2: Poor Placement 
-  Problem : Placing TVS too far from protected component
-  Solution : Position within 1-2 cm of connector or protected device for optimal response

 Pitfall 3: Inadequate Current Handling 
-  Problem : Underestimating transient current levels
-  Solution : Calculate worst-case surge current and verify 15kW rating is sufficient

 Pitfall 4: Thermal Management 
-  Problem : Ignoring power dissipation during repeated transients
-  Solution : Provide adequate copper area for heat sinking on PCB

### Compatibility Issues with Other Components

 Compatible Components: 
-  Microcontrollers : Compatible with 3.3V and 5V logic families when properly rated
-  Power Management ICs : Works well with LDO regulators and DC-DC converters
-  Communication ICs : Suitable for RS-485 transceivers, CAN bus controllers

 Potential Conflicts: 
-  High-Speed Interfaces : May introduce capacitance (150pF typical) affecting signal integrity
-  Precision Analog Circuits : Leakage current may affect high-impedance nodes
-  Low-Power Systems : Standby power consumption may impact battery life

### PCB Layout Recommendations

 Placement Strategy: 
- Position as close as possible to entry points (connectors, cables)
- Use shortest possible traces to protected components

Alternative Part Number

  • P6KE20CA --: Same 20V bidirectional TVS diode in a smaller DO-15 package with 600W peak pulse power, suitable for lower-surge clamping applications.
  • SMBJ20CA --: 20V bidirectional TVS in SMB surface-mount package, 600W rating, good drop-in for space-constrained designs needing similar clamping voltage.
  • 5KP20CA --: Higher 5000W peak pulse power bidirectional TVS at 20V, offering greater surge robustness when board space allows the larger axial package.
  • P6KE20CA --: Same 20V bidirectional TVS diode family with lower peak power (600W vs 1500W); suitable if surge requirements are reduced and widely available.
  • SMBJ20CA --: Surface-mount 20V bidirectional TVS with 600W rating; good drop-in for space-constrained designs needing similar clamping behavior.
  • SMCJ20CA --: 1500W-class 20V bidirectional TVS in SMC package, matching the original power rating and offering a comparable protection level.
  • P6KE20CA --: Same 20V bidirectional TVS diode in a smaller DO-15 package; widely available and electrically compatible for lower-power surge protection.
  • SMBJ20CA --: 20V bidirectional TVS in SMB surface-mount package; suitable drop-in alternative when board space or SMT assembly is preferred.
  • SA20CA --: 20V bidirectional transient voltage suppressor with similar clamping characteristics; good cross-series alternative from a different product family.
  • P6KE20CA --: Same 20V bidirectional TVS diode family with similar clamping characteristics, widely available and often used as a lower-power substitute.
  • SMBJ20CA --: Surface-mount bidirectional 20V TVS with comparable standoff voltage and clamping performance, suitable when SMB package is acceptable.
  • SA20CA --: Axial bidirectional 20V TVS diode offering similar protection levels and a different series naming for easy distinction.

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