NTC 5D-15 thermistor

🔹 NTC 5D-15 Thermistor – Inrush Current Limiter, 5Ω, 6A

The NTC 5D-15 is a negative temperature coefficient thermistor designed to limit inrush current in power supplies and electronic equipment. It provides soft-start protection by reducing its resistance as it heats up, protecting sensitive components from surge currents during power-up .

✅ Specifications:

Zero Power Resistance @ 25°C: 5Ω ±20%

Maximum Steady-State Current: 6A

B Value (B25/50): 2800K

Package: Through-hole, DIP P=7.5mm

Diameter: 15mm (body)

Operating Temperature: -40°C to +200°C

Thermal Time Constant: 76s – 86s

Dissipation Constant: 18–20 mW/°C

Power Rating: 3.5W

📦 Features:
✔️ Low initial resistance (5Ω) to allow power-up while limiting current
✔️ Self-heating reduces resistance to minimize power loss during normal operation
✔️ Epoxy-coated disc construction for durability and insulation
✔️ Stable performance over a wide temperature range
✔️ RoHS compliant (varies by manufacturer)

📦 Applications:
✔️ Inrush current limiting in switching power supplies (SMPS)
✔️ Soft-start circuits for transformers, motors, and capacitors
✔️ UPS power systems and electronic ballasts
✔️ Over-current protection in battery chargers
✔️ Surge suppression in AC/DC converters
✔️ Temperature sensing in industrial equipment