NTC10D20 Black Code: 82861013

The 10D20 (or MF72-10D20) is a disk-style NTC (Negative Temperature Coefficient) thermistor designed primarily for inrush current limiting. At room temperature, it provides 10 Ω of resistance to suppress power-on current spikes, then drops to a low residual resistance (0.16 Ω) as it heats up during steady operation.

Key Specifications

• Nominal Resistance (R₂₅):10 Ω ± 20%
• Maximum Steady Current:0 A
• Body Diameter:20 mm
• Operating Temperature Range:-40°C to +125°C (or up to 200°C depending on the manufacturer)
• Thermal Time Constant (τ):~ 113 seconds

Common Applications

It is widely used in power electronics to protect sensitive components from surge currents upon startup. Common use cases include:

• Switching Power Supplies (SMPS)
• UPS (Uninterruptible Power Supplies)
• LED drivers and lighting ballasts
• Power amplifiers and motors