Thick Film Power Resistors Type BDS250/400 Series Type BDS250/400 Series Characteristics - Electrical Resistance Range: 0R47 - 1M Resistance Tolerance: ± 10%, 5% (Tighter by discussion) TCR: R<1Ω ± 250ppm/°C R>1Ω ± 150ppm/°C Rated Power: Heatsink: 100°C / 70°C 250W / 400W Capacitance: Parallel 40pF To Earth 160pF Series Inductance: 40nH (Maximum) Limiting Element Voltage: 5kV dc/ac rms With less than 40nH inductance and Isolating Voltage: (Terminal to Heatsink) 7kV ac rms a 250W or 400W power rating Single Shot Voltage: 1.5/50ms 12kV (100°C/70°C Heatsink) in a 67mm x 60mm casing, the Insulation Resistance: (at 500V dc) >100GΩ BDS250/400 offers high power Partial Discharge: at 7.5kV <10pC density over a wide range of ohmic Heat Dissipation: Although the use of proprietary heat sinks with lower thermal resistance is values (0R47 – 1M0) and benefits acceptable, up rating is not recommended. The use of proprietary heat sink from 10 years experience in the field. compound to improve thermal conductivity is essential. Available in 5 resistor configurations with 2 or 4 easy to connect terminals, the resistors are made from quality Characteristics - materials for optimum reliability Environmental and stability with very low partial discharge. Endurance (Rated Power): Full Load, 1000h, 25°C ∆R 0.25% Typ Tyco can test resistors to conform to Humidity Load Life: 56 Days, 40°C, 95% RH ∆R 0.2% Typ (I.R.>10GΩ) relevant customer specifications, Temperature Cycling: -55°C to +125°C, 5cycles ∆R 0.2% Typ and will advise on the use of resistors Operating Storage Temp: -55°C to +125°C for pulse energy and high voltage applications (HV designs available). Short Term Overload: 750W, 10s ∆R 0.2% Typ Resistors with 1% tolerance, Vibration: 10/500Hz ∆R 0.25% Typ alternative terminations or flying Bump: 40g 4000 bumps ∆R 0.25% Typ leads are available, and custom designs are welcome. Characteristics - This product is available via distribution. Mechanical Terminal Size: M4 Key Features Terminal Torque (max.): 1.3Nm 2 Creepage Distance: 40mm � 400W in a 40.2cm Clearance: Terminal to Heatsink 28mm footprint Terminal to Terminal 40mm • Gives an impressive Heatsink Surface Finish: Ra < 6µm power density of 2 Heatsink Flatness: 0.05mm 10W/cm Thermal Grease: Required � Virtually inductance-free Weight: 190g • Inductance < 40nH � Wide resistance range: Dimensions 0.47Ω to 1MΩ • Coupled with 1% M4 (min 8mm) 67.0 ±0.25 67.0 ±0.25 tolerance gives ultimate 14.8 max. M4 (min 8mm) 34.0 34.0 14.8 max. design flexibility 2 4 3 � Multiple terminal MEC configurations and MEC multi-resistor packages 1 12 • The space saving 10.5 max. 10.5 max. ş4.5 ±0.25 ş4.5 ±0.25 solution for demanding 57.0 ±0.25 57.0 ±0.25 30.0 max. 30.0 max. creep and clearance requirements � Partial discharge Applications <10pC at 7.5kV � Snubbing (Low inductance) � High Voltage • Guaranteeing quality, � Balancing Resistor � High Frequency reliability and long life (Multi-resistor package) � Filter (Low inductance) Literature No. 1773307 Dimensions are shown for Dimensions are in millimetres Specifications subject to www.tycoelectronics.com Issued: 02-06 reference purposes only. unless otherwise specified. change. passives.tycoelectronics.com 36.0 60.0 ±0.25 ş14.0 ş21.0 36.0 60.0 ±0.25 ş14.0 ş21.0 Thick Film Power Resistors Type BDS250/400 Series Terminal Circuit Type D (Network Tapped) A (Standard) 1 2 1 2 4 3 B (Voltage Sense) E (Network 3 Res.) 1 2 4 3 43 C (Isolated 2 Res.) 12 1 2 4 3 Derating Curve Pulse Energy 450 100 400 350 300 250 10 200 150 100 50 0 0.1 0 20 40 60 80 100 120 140 160 0.01 0.1 1 10 Heatsink Temp. (degC) Time (msecs) Power Overload 8 *70°C 7 6 *80°C 5 4 *90°C 3 *100°C 2 1 0 1 10 100 1000 Time (msecs) *Temperature - Heatsink How to Order BDS 2 A 250/400 1K0 J Common Part Circuit Type Power Dissipation Resistance Value Tolerance 0.47Ω (470mΩ) F - 1% BDS 2 (2 Terminal) A: Standard 250 - 250 Watts R47 J - 5% 1Ω BDS 4 (4 Terminal) B-E: See above 400 - 400 Watts K - 10% (1000mΩ) 1R0 1K (1000Ω) 1KO 1M (1000000Ω) 1MO Literature No. 1773307 Dimensions are shown for Dimensions are in millimetres Specifications subject to www.tycoelectronics.com Issued: 02-06 reference purposes only. unless otherwise specified. change. passives.tycoelectronics.com Power (W) Multiples of Rated Power (250W) Energy (J)