Carbon Composition Resistors Type CBT Series Type CBT Series Characteristics Electrical Power at 70°C Ambient: CBT25 CBT50 0.25 Watts Derating to 0 at +125°C 0.5 Watts Derating to 0 at +125°C Maximum Voltage: 250 Volts 350 Volts Resistance Range: 1R0 - 5M6 1R0 - 22M Resistance Values: 5% E24 Series 10% E12 Series 20% E6 Series Voltage Coefficient: composition, which is the traditional medium for absorbing high energy ± 0.035%/V Limiting Element Voltage: 250 Volts 350 Volts Maximum Overload Voltage: 400 Volts 700 Volts Insulation Resistance: The CBT series of resistors is constructed utilising solid carbon ± 0.035%/V 1000 M minimum Characteristics Environmental pulses, in cases of high inrush current. Operating Temperature Range: These resistors have evolved over Temperature Cycles: (-55°C to +125°C, 5 cycles) ∆R/R ± 2% withstand capabilities, whilst remaining Load Life (1000 hours at 70°C): ∆R/R ± 10% very Resistance to Solder Heat: (350°C for 3 seconds) ∆R/R ± 3% Short Time Overload: (2.5 x Rated Power for 5 seconds) ∆R/R ± 2% Humidity (40°C, 95%RH, 240 hrs): ∆R/R ± 3% many years to have excellent pulse stable. These improved characteristics have been achieved by prudent selection of materials of optimum physical properties and -55°C to +125°C by advances in the manufacturing process. DimensionsKey Features ■ Designed for Pulse Withstand ■ Range of Resistance Tolerances ■ Solid Carbon Composition ■ Low Cost, High Performance Style L D l d ■ Two Sizes Available CBT25 6.3 ± 0.7 2.4 ± 0.1 27 min. 0.6 ■ Wide Range of Resistance Values CBT50 9.5±0.8 3.6±0.2 25 min. 0.7 ■ Supplied Ammo Pack in boxes of 2000 Pulse Withstand Characteristics Charging and Discharging a 2000 pF Capacitor for 100 Cycles 10 10 0 0 a b b -10 -30 c CBT25 a: 1.2MΩ b: 33kΩ c: 1kΩ -20 0 2 ∆R/R(%) ∆R/R(%) a c -10 CBT50 a: 1.2MΩ b: 10kΩ c: 1kΩ -20 4 6 8 10 12 14 -30 0 2 4 6 8 10 12 14 Voltage (kv) Voltage (kv) How to Order CBT 25 J 10K Common Part Size Tolerance Resistance Value J - ±5% 1 ohm (1 ohm) 1R0 Carbon Composition Resistor 25 - 0.25W K - ±10% 50 - 0.5W 1K ohm (1000 ohms) 1K M - ±20% 100K ohm (100000 ohms) 100K 1M ohm (1000000 ohms) 1M Literature No. 1773192 Issued: 12-05 Dimensions are shown for reference purposes only. Dimensions are in millimetres unless otherwise specified. Specifications subject to change. www.tycoelectronics.com passives.tycoelectronics.com