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1.5KE7.5A from ST,ST Microelectronics

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1.5KE7.5A

Manufacturer: ST, TCI, GS, DIODES

1500 WATT PEAK POWER TRANSIENT VOLTAGE SUPPRESSORS

Partnumber Manufacturer Quantity Availability
1.5KE7.5A,15KE75A ST, TCI, GS, DIODES 17241 In Stock

Description and Introduction

1500 WATT PEAK POWER TRANSIENT VOLTAGE SUPPRESSORS The part number 15KE75A is a Transient Voltage Suppressor (TVS) diode manufactured by TCI. It is designed to protect sensitive electronics from voltage transients and surges. The key specifications for the 15KE75A are as follows:

- **Peak Pulse Power (PPP):** 1500W (10/1000μs waveform)
- **Standoff Voltage (VWM):** 64.2V
- **Breakdown Voltage (VBR):** 71.2V (min) to 78.7V (max)
- **Clamping Voltage (VC):** 103V at 77.3A
- **Maximum Reverse Leakage Current (IR):** 5μA at VWM
- **Operating Temperature Range:** -55°C to +175°C
- **Package:** DO-201AD (Axial Lead)

The 15KE75A is commonly used in applications such as power supplies, automotive systems, and telecommunications equipment to protect against overvoltage conditions.

Application Scenarios & Design Considerations

1500 WATT PEAK POWER TRANSIENT VOLTAGE SUPPRESSORS# Technical Documentation: 15KE75A TVS Diode

*Manufacturer: TCI*

## 1. Application Scenarios

### Typical Use Cases
The 15KE75A is a unidirectional transient voltage suppression (TVS) diode designed for robust overvoltage protection in electronic circuits. Primary applications include:

 Transient Protection in Power Supplies 
- AC/DC converter input protection against line transients
- DC-DC converter output protection from voltage spikes
- Switching power supply input/output clamping

 Communication Line Protection 
- Ethernet port protection (RJ45 interfaces)
- Telecom line cards and subscriber line interfaces
- RS-232/RS-485 serial communication interfaces

 Automotive Electronics 
- Load dump protection in automotive power systems
- CAN bus and LIN bus network protection
- ECU (Engine Control Unit) input protection

### Industry Applications
 Industrial Automation 
- PLC I/O module protection
- Motor drive control circuits
- Sensor interface protection in harsh environments

 Consumer Electronics 
- Set-top box and television power input protection
- Gaming console power supply units
- Home appliance control boards

 Telecommunications 
- Base station power distribution units
- Network equipment power entry protection
- Fiber optic network terminal equipment

### Practical Advantages and Limitations
 Advantages: 
-  Fast Response Time : Responds to transients in picosecond range (typically <1.0 ps)
-  High Peak Pulse Power : Capable of handling 15,000W peak pulse power
-  Low Clamping Voltage : Provides effective voltage limiting at 103V maximum
-  Robust Construction : Hermetically sealed package ensures reliability in harsh conditions

 Limitations: 
-  Limited Energy Absorption : Not suitable for sustained overvoltage conditions
-  Parasitic Capacitance : ~150pF typical may affect high-frequency signal integrity
-  Unidirectional Operation : Only protects against positive voltage transients
-  Physical Size : DO-201 package requires adequate PCB space allocation

## 2. Design Considerations

### Common Design Pitfalls and Solutions
 Pitfall 1: Improper Voltage Rating Selection 
-  Problem : Selecting TVS with working voltage too close to normal operating voltage
-  Solution : Ensure 75V working voltage provides adequate margin above 48-60V typical operating ranges

 Pitfall 2: Inadequate Current Handling 
-  Problem : Underestimating transient current magnitude
-  Solution : Verify 15KE75A's 146A peak pulse current rating exceeds expected transient levels

 Pitfall 3: Thermal Management Issues 
-  Problem : Overheating during repeated transient events
-  Solution : Provide adequate copper area for heat dissipation and consider derating for high-temperature environments

### Compatibility Issues with Other Components
 Power Supply Compatibility 
- Compatible with switching regulators up to 60V output
- May require series resistors with linear regulators to limit current
- Ensure compatibility with upstream fuses and circuit breakers

 Signal Integrity Considerations 
- Parasitic capacitance (150pF typical) may affect high-speed data lines (>100MHz)
- For sensitive analog circuits, consider lower capacitance TVS alternatives
- Verify compatibility with ESD protection requirements of connected ICs

### PCB Layout Recommendations
 Placement Strategy 
- Position as close as possible to protected circuit or connector
- Minimize trace length between TVS and protected component (<25mm recommended)
- Place on the side of the filter/ferrite bead closest to potential transient source

 Routing Guidelines 
- Use wide traces (minimum 40 mil) for power connections
- Maintain adequate clearance (≥2.5mm) from other high-voltage traces
- Avoid sharp corners in high-current paths

 Thermal Management 
- Provide generous copper pour connected to TVS mounting pads
- Consider thermal vias to inner ground planes for improved heat dissipation
-

Alternative Part Number

  • P6KE7.5A --: Same 7.5V standoff unidirectional TVS diode in a smaller DO-15 package, suitable when lower peak pulse power is acceptable.
  • SMAJ7.5A --: Surface-mount 400W unidirectional TVS with 7.5V standoff, good form-factor alternative for SMD designs.
  • SMBJ7.5A --: 600W SMB surface-mount unidirectional TVS with matching 7.5V standoff voltage and similar clamping characteristics.
  • P6KE7.5A --: Same 7.5V standoff unidirectional TVS in a smaller DO-15 package; widely available and often used where 1.5KE surge rating is not fully required.
  • SMAJ7.5A --: Surface-mount 400W unidirectional TVS with 7.5V standoff; suitable drop-in for space-constrained designs needing similar clamping behavior.
  • SMBJ7.5A --: 600W SMB unidirectional TVS with 7.5V standoff; closer surge rating to the original while offering a different series and package.
  • P6KE7.5A --: Same 7.5V standoff unidirectional TVS in a smaller DO-15 package; widely available and a common drop-in when power dissipation margin allows.
  • SMAJ7.5A --: Surface-mount 400W unidirectional TVS with matching 7.5V standoff voltage; suitable alternative when moving from axial to SMD layout.
  • SA7.5A --: 500W unidirectional TVS diode with the same 7.5V standoff and DO-15 axial package, offering a lower-power but pin-compatible substitute.
  • P6KE7.5A --: Same 7.5V standoff unidirectional TVS in a smaller DO-15 package; widely available and a common drop-in when lower surge rating is acceptable.
  • SMAJ7.5A --: Surface-mount 400W unidirectional TVS with matching 7.5V standoff; suitable alternative when board space favors SMD.
  • SA7.5A --: 500W unidirectional TVS with the same 7.5V standoff voltage in a DO-15 axial package; good electrical match for lower-power designs.

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