10D-11 Negative Temperature Coefficient Thermistor

10D-11 Negative Temperature Coefficient Thermistor is a highly reliable power-type NTC component designed to protect sensitive electronics from high inrush current surges. This device exhibits a high electrical resistance at room temperature. Consequently, it effectively limits the initial current flow when you first power on a circuit. As the current passes through, the thermistor heats up and its resistance drops significantly. Therefore, the 10D-11 allows the circuit to operate with minimal power loss once stable conditions are met. Furthermore, its robust ceramic construction ensures long-term stability and durability in demanding power supply environments. You can easily integrate this 11mm diameter thermistor into various AC and DC circuits to enhance system longevity and prevent blown fuses or damaged components.

Key Features:

• High Inrush Current Suppression: The 10D-11 effectively absorbs peak surge currents during startup, protecting downstream components like bridge rectifiers and capacitors.
• Reliable NTC Material: Manufacturers use high-quality metal oxide ceramic material to ensure a consistent negative temperature coefficient response.
• Compact Radial Design: The 11mm disk size offers an excellent balance between high power handling and space-saving PCB integration.
• Low Residual Resistance: Once the device reaches its operating temperature, the resistance falls to a very low level. As a result, it maintains high circuit efficiency during continuous operation.
• Wide Operating Range: This thermistor functions reliably across a broad temperature spectrum, making it suitable for industrial and consumer applications.

Technical Specifications:

• Zero Power Resistance (R25): 10 Ω ±20% (at 25°C)
• Maximum Steady State Current: 3.0 A
• Approximate Resistance at Max Current: 0.352 Ω
• Thermal Dissipation Constant: ≈ 13 mW/°C
• Thermal Time Constant: ≤ 45 seconds
• Operating Temperature: −55°C to +200°C
• Maximum Capacitance: 470 μF (at 240 VAC)

Mechanical Specifications:

• Coating Material: Phenolic Resin (Silicone based for high-temperature resistance)
• Lead Type: Radial tinned copper wire
• Solderability: Meets standard lead-free soldering requirements
• Color: Black or Dark Green (depending on batch)

Dimensions:

• Disk Diameter (D): ≈ 11.0 mm
• Disk Thickness (T): ≈ 5.0 mm
• Lead Pitch (F): ≈ 7.5 mm
• Lead Diameter: ≈ 0.8 mm
• Total Height: ≈ 15.0 mm (excluding lead length)

Pinout and Wiring:

• Polarity: This component is non-polarized; however, you must install it in series with the AC or DC input line.
• Connection Point: Place the 10D-11 between the fuse and the bridge rectifier for optimal protection.
• Heat Dissipation Note: Leave sufficient space around the body during PCB mounting because the device reaches high temperatures during normal operation.

Datasheet Reference:

• Download 10D-11 Power NTC Thermistor Datasheet

Commonly Used in:

• Switch Mode Power Supplies (SMPS): To prevent high-energy inrush into large filter capacitors.
• AC Motors: Limiting the initial torque and current spike during startup.
• LED Drivers: Protecting internal circuitry from line voltage transients.

Applications:

• Uninterruptible Power Supplies (UPS): Ensuring safe battery charging startup.
• Consumer Electronics: Protecting TVs, monitors, and audio amplifiers from power surges.
• Heating Elements: Managing current flow in small heaters or halogen lamps.

Equivalent Models:

• MF72-10D11: The standard industrial part number for this specific specification.
• SCK-103: A functionally similar inrush current limiter with a 10 Ω base resistance.
• NTC 10D-13: A slightly larger version (13mm) that offers higher current handling capabilities.

Package Includes:

• 1 x 10D-11 Negative Temperature Coefficient (NTC) Thermistor