0.1A 250V Glass Cartridge Fuse 5 x 20mm

0.1A Glass Fuse (5 x 20mm) is a highly precise circuit protection component designed for low-power electronic systems. This specific 100mA rated fuse offers essential safeguarding for extremely sensitive instruments that cannot withstand even minor overcurrent events. Consequently, it acts as a reliable sacrificial element by melting its internal wire rapidly when current exceeds the safe threshold. Therefore, using the 0.1A Glass Fuse prevents catastrophic failure in expensive laboratory electronics or medical diagnostic tools. Furthermore, its standardized 5 x 20mm glass body provides universal compatibility with most small-form fuse holders. Indeed, this component remains a staple for technicians requiring high-resolution overcurrent protection in delicate circuitry. Briefly, it ensures your project stays protected from unexpected electrical surges and short circuits that could otherwise lead to costly repairs.

Key Features:

• Ultra-Sensitive Protection: Specifically calibrated to interrupt current at just 100mA, making it ideal for protecting fine signal lines and high-impedance inputs in laboratory-grade equipment.
• Fast-Acting Response Profile: Featuring a rapid clear time, this fuse opens the circuit almost instantly during an overload, thus preventing damage to fragile semiconductor junctions.
• Transparent Inspection Body: The high-quality glass tube construction allows for immediate visual verification of the fuse state, consequently simplifying the troubleshooting process during maintenance.
• Robust Construction: Utilizing nickel-plated brass end caps, the fuse ensures excellent electrical conductivity and resistance to oxidation, therefore maintaining long-term reliability in various environments.
• Standardized Form Factor: The 5 x 20mm dimensions strictly adhere to international IEC standards, ensuring it fits perfectly into standard PCB clips, panel-mount holders, and inline fuse blocks.

0.1A Glass Fuse Technical Specifications:

• Rated Current (I_N): 0.1 A (100 mA)
• Rated Voltage (V_N): 250 V_AC
• Breaking Capacity: 35 A @ 250 V_AC (Low Breaking Capacity)
• Fuse Characteristic: Fast-Acting (F)
• Operating Temperature Range: −55°C to +125°C
• Internal Resistance (R_DC): Approximately 2.5 Ω to 4.5 Ω

Mechanical Specifications:

• Body Material: Transparent Cylindrical Glass
• End Cap Material: Nickel-Plated Brass Alloys
• Internal Element: Fine Silver-Plated Copper Wire
• Package Style: Cartridge (Ferrule Type)
• Device Marking: F0.1AL250V (F for Fast, 0.1A for Current, L for Low Breaking Capacity)

Dimensions:

• Diameter (D): 5.0 mm (±0.2 mm)
• Length (L): 20.0 mm (±0.5 mm)
• Form Factor Standard: IEC 60127-2

Pinout and Wiring:

• Function: This fuse serves as a two-terminal, non-polarized series safety device.
• Input Connection: Mount one terminal end to the “Hot” or “Line” side of the incoming power source.
• Output Connection: Direct the second terminal end toward the internal sensitive circuitry or the “Load” side.
• Wiring Note: Additionally, always install the fuse holder in series with the positive or line rail. Never bypass the fuse during testing as this removes all overcurrent protection.

Datasheet Reference:

• Download 0.1A Glass Fuse Datasheet (5x20mm Fast-Acting)

Commonly Used in:

• Digital Multimeters: Protecting the milliamp and microamp measurement ranges from accidental high-voltage inputs.
• Medical Instruments: Shielding delicate sensor arrays and patient monitoring systems from internal power faults.

Applications:

• Precision Instrument Protection: Safeguarding calibration equipment and high-end oscilloscopes from power supply surges.
• Low-Power Control Circuits: Specifically, protecting PLC inputs and small signal relays in industrial automation environments.
• Consumer Electronics: Shielding small-scale AC adapters and specialized chargers for rechargeable batteries.

Equivalent Models:

• Bussmann GMA-100mA: A reputable industry equivalent featuring identical response times and voltage ratings.
• Bel Fuse 5SF 100-R: A drop-in replacement standard for 5x20mm fast-acting protection requirements.
• Littelfuse 217.100: Part of the 217 series designed for high-precision circuit breaking under fault conditions.

Package Includes:

• 1 x 0.1A 250V Glass Cartridge Fuse (5 x 20mm)