5D-13 Negative Temperature Coefficient Thermistor

5D-13 Negative Temperature Coefficient (NTC) Thermistor is a reliable inrush current limiter designed to protect electronic circuits during power-up. By providing a higher resistance at room temperature that decreases as it warms up, the device effectively reduces surge currents and extends the lifespan of components in power supplies, chargers, and other electronic systems.

Key Features:

• Inrush Current Limiting: Controls sudden surge currents when equipment is first powered on.
• Stable Resistance Change: Resistance decreases predictably as temperature rises.
• Compact Design: Small footprint allows easy integration into tight PCB layouts.
• Long Service Life: Built for durability in repetitive power cycles.
• Cost-Effective Solution: Offers simple and reliable circuit protection without complex electronics.

Technical Specifications:

• Resistance at 25 °C (R₂₅): 5 Ω ±20%
• Maximum Steady-State Current: Up to 3 A (typical)
• Dissipation Constant: ~20 mW/°C
• Thermal Time Constant: ~20 s
• Operating Temperature Range: −40 °C to +125 °C
• Insulation Resistance: ≥100 MΩ at 500 V DC

Mechanical Specifications:

• Package Type: Radial leaded disk thermistor
• Leads: Tinned copper leads for secure soldering
• Body Material: Epoxy-coated ceramic for mechanical strength and insulation
• Mounting: Through-hole for standard PCB assembly

Dimensions:

• Disk Diameter: Approx. 13 mm
• Thickness: Around 4.5 mm
• Lead Diameter: ~0.8 mm
• Lead Spacing: ~7.5 mm (typical)

Pinout and Wiring:

• Lead 1: Connect to AC or DC supply input line
• Lead 2: Connect to the load side of the circuit
• Connection Note: Insert in series with the power line for effective inrush current suppression.

Datasheet Reference:

• Check the official manufacturer’s datasheet for complete resistance curves, thermal behavior, and derating guidelines.

Applications:

• Switch-Mode Power Supplies (SMPS): Prevents stress on capacitors and rectifiers during startup.
• Battery Chargers: Limits surge currents in charging circuits.
• LED Drivers: Protects LED power supplies from inrush stress.
• Home Appliances: Used in TVs, monitors, and other consumer electronics for circuit protection.

Equivalent Models:

• NTC 5D-11: Smaller disk version with similar resistance but lower current rating.
• NTC 5D-15: Slightly larger size, higher current handling capability.
• MF72 Series: Widely used alternative for inrush current limiting applications.

Package Includes:

• 1 x 5D-13 Negative Temperature Coefficient Thermistor