Carbon Resistor 120Ω 0.125W Through Hole

Description

Carbon Resistor 120Ω 0.125W Through Hole The 120 Ω carbon-film through-hole resistor rated at 0.125 W is a compact axial passive component built for general-purpose electronic use. Its carbon resistive element is covered with a flame-retardant protective coating and terminated with axial leads to allow straightforward soldering, mechanical stability, and compatibility with both manual and automated assembly processes. The 1/8-watt class balances small size with modest power dissipation for low-power circuits. Electrically, the resistor provides a nominal 120 Ω value with common tolerance options (typically 2% or 5%) and a temperature coefficient appropriate for its ohmic band. Maximum working voltage for the family is constrained by the lesser of the series maximum or the √(P·R) rule; for 120 Ω at 0.125 W that practical limit is about 3.87 V, which implies a rated DC current near 32.3 mA. The part is designed to meet standard IEC/JIS test methods for short-time overload, soldering heat, temperature cycling, endurance and damp-heat. Mechanically it typically uses the CF size 18 axial body (≈3.30 mm long × 1.70 mm dia.) with ~28 mm leads, making it easy to insert into PCBs or to hand-solder. It withstands industrial temperature extremes (−55 °C to +155 °C) and is RoHS/REACH compliant, offering reliable, economical performance for low-power commercial and industrial circuits. Features: General-purpose resistor ideal for commercial and industrial applications. Flame-retardant protective coating standard; flameproof versions available (CFF/CFFM). Compatible with automatic sequencing / insertion (Panasert options on selected sizes). CFM mini variant for size-constrained applications. Standard lead finish: copper-plated steel with 100% tin overplate (CF / CFM); tin-on-copper available as CFQ/CFQM. RoHS and REACH compliant, lead-free and halogen-free. Specifications: Parameter Value Series / Type: CF (Carbon Film axial), size 18 — 0.125 W class. Nominal resistance: 120 Ω. (customer selected) Available tolerances: 2% (G) and 5% (J) typical. Power rating: 0.125 W (1/8 W) @ 70 °C. Temperature coefficient (TCR): For 10 Ω to 9.99 kΩ band: 0 ~ −400 ppm/°C (applies to 120 Ω). Maximum working voltage (series limit): 250 V (size 18 family limit). Maximum working voltage (for 120 Ω): √(P·R) = √(0.125×120) ≈ 3.87 V (the lesser of series limit and √(P·R) rule — see datasheet). Rated current (based on Vr): ≈ 32.3 mA (3.87 V / 120 Ω). (derived from datasheet formula) Maximum overload voltage: 500 V (size 18 entry). Dielectric withstanding voltage: 350 V (size 18 entry). Operating / storage temperature: −55 °C to +155 °C. Body dimensions (size 18 typical): Body length ≈ 3.30 ±0.30 mm, body dia ≈ 1.70 ±0.30 mm, lead length ≈ 28.00 ±3.00 mm, lead dia ≈ 0.40 ±0.08 mm. Lead finish / termination: Copper-plated steel, 100% tin overplate (CF / CFM) — CFQ/CFQM = tin plated on copper wire. Soldering / mounting: Flow solder preheat ≤110 °C; peak 260 °C within 10 s. Iron soldering: 380 °C, 5 s per terminal. Standards / tests: Meets JIS C5201-1 / IEC60115 test methods for overload, soldering heat, temp. change, endurance, damp heat. Applications: USB Data Line Termination. CAN-Bus Network Termination. Current Limiting for Low-Power LEDs. RS-485 Communication Line Termination. In-Circuit Serial Programming (ICSP) Damping. Audio Line Input/Output Impedance Matching. Pull-Up/Pull-Down for Digital Logic Circuits. Voltage Division in Low-Current Sensor Circuits. Feedback Resistor in Low-Power Op-Amp Circuits. General Purpose PCB Prototyping and Repair. Package Contents: 1x Carbon Resistor 120Ω 0.125W Through Hole Datasheet

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