FHR 2-3025 3818 FHR 4-3825 3825H 4618 Powertron * * * * * Resistances from 0.001Ohm to 100Ohms Power Rating to 50Watt Resistance Tolerances to 0.1% TCR to 10ppm/K Very Low Inductance SPECIFICATIONS Type FHR 2-3025 FHR 2-3818 FHR 4-3825 FHR 4-3525H FHR 4-4618 Resistance Range 0.010 to 100Ohms 0.001 to 100Ohms 3W 40 W 3W 5W 50 W 2.0 K/W 1.6 K/W Power rating free air 70C for 3825H with heatsink Thermal Resistance Rthj-c Tolerances from 0R001 from 0R005 from 0R01 from 0R02 1% / 2% / 5% 0.5% / 1% / 2% / 5% 0.1% / 0.25% / 0.5% / 1% / 2% / 5% 0.1% / 0.25% / 0.5% / 1% / 2% / 5% 0.5% / 1% / 2% / 5% 0.25% / 0.5% / 1% / 2% / 5% Stability 0.1% / 0.2% / 0.5% (depends on stress) Temperature Coefficient Standard 15ppm/K (20 to 60C) R 0R2 TCR see table A next page 15ppm/K (20 to 60C) 25ppm/K (20 to 60C) for contact F Option 1 10ppm/K (20 to 60C) (only contact A and K) Max. Current 150 A / 200 A for contact F Voltage Proof 500 VDC Thermal EMF < 0.1V/K Operating Temperature Range -40 to 130C Resistor Material CuNiMn-Foil Substrate anodized aluminium Housing Epoxy Connector Material Cu tinned Terminals 2 Max. torque 4 1 Nm Ordering Information Part Number - Resistance - Contact - Tolerance FHR 4-4618 0.050 Ohms A 1% Document Number: 64206 Revision: 20-09-10 For technical questions, contact: powertron@vishaypg.com www.powertron.de 1 FHR 2-3025 3818 FHR 4-3825 3825H 4618 Powertron SPECIFICATIONS (continued) Temperature Coefficient 4000 +15ppm/K TCR-Shift (ppm/K) 200 0 -15ppm/K Limit 2 (3s) 50 Nominal DR/R Limit 1 (3s) -20 0 40 20 60 80 Temperature (C) Power ( % from nominal power) 120 100 120 140 Derating 0.2% 80 0.1% 60 Power Rating Notes - RqH = TMAX - ( P x RqR ) - TA P 40 20 Where: 0 25 50 85 100 115 130 Temperature of the backplate (C) FHR 4-3825 / FHR 4-3825H www.powertron.de 2 200 Resistance Value (mOhm) The FHR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130C. To specify an appropriate heatsink use the following formula : 0.5% 100 50 0 2 -8000 -40 100 -6000 20 -4000 100 5 -2000 150 10 2000 DR/R (ppm) table A 250 Dimensions RqH = Thermal Resistance of Heatsink ( K/W ) RqR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( C ) P = Power Through Resistor ( W ) Dimension mm tol. (mm) inches tol. (inches) A 24.00 0.2 0.94 0.008 B 38.00 0.3 1.50 0.012 C 1.40 0.4 0.06 0.016 D 4.00 0.1 0.16 0.004 E 34.00 0.3 1.34 0.012 F 17.50 0.2 0.69 0.008 G 1.5x45 0.1 0.06x45 0.004 H 17.50 0.2 0.69 0.008 I 27.50 0.2 1.08 0.008 J (A-Contact) 1.50 0.1 0.06 0.004 J (K-Contact) 1.10 0.1 0.04 0.004 K 3.00 0.1 0.12 0.004 L 3.20 0.1 0.13 0.004 M 2.00 0.1 0.08 0.004 N max.5.5 0.2 max.0.22 0.008 N (Variante H) max.10.3 0.2 max.0.4 0.008 O 30.40 0.4 1.20 0.016 P 15.00 0.2 0.59 0.008 Q (A-Contact) 3.60 0.1 0.14 0.004 Q (K-Contact) 3.30 0.1 0.13 0.004 R 2.80 0.1 0.11 0.004 S (Variante H) 19.00 0.2 0.75 0.008 For technical questions, contact: powertron@vishaypg.com Document Number: 64206 Revision: 20-09-10 FHR 2-3025 3818 FHR 4-3825 3825H 4618 Powertron SPECIFICATIONS (continued) FHR 4-3825F FHR 4-4618 Document Number: 64206 Revision: 20-09-10 Dimension mm tol. (mm) inches tol. (inches) A 24.00 0.2 0.94 0.008 B 38.00 0.3 1.50 0.012 C 1.50 0.2 0.06 0.008 D 4.00 0.1 0.16 0.004 E 34.00 0.3 1.34 0.012 F 17.50 0.2 0.69 0.008 G 1.5x45 0.1 0.06x45 0.004 H 34.00 0.2 1.34 0.008 I 32.70 0.2 1.29 0.008 J 7.50 0.2 0.30 0.008 K 24.00 0.2 0.94 0.008 L 6.30 0.2 0.25 0.008 M 4.80 0.1 0.19 0.004 N 3.20 0.1 0.13 0.004 O 2.00 0.1 0.08 0.004 P 6.00 0.2 0.24 0.008 Q 15.00 0.2 0.59 0.008 R 4.10 0.7 0.16 0.028 S 3.30 0.7 0.13 0.028 Dimension mm tol. (mm) inches tol. (inches) A 17.00 0.1 0.67 0.004 B 46.00 0.3 1.81 0.012 C 1.40 0.4 0.06 0.016 D 8.50 0.2 0.33 0.008 E 40.00 0.3 1.57 0.012 F 34.00 0.3 1.34 0.012 G 1.5x45 0.1 0.06x45 0.004 H 17.50 0.2 0.69 0.008 I 27.50 0.2 1.08 0.008 J (A-Contact) 1.50 0.1 0.06 0.004 J (K-Contact) 1.10 0.1 0.04 0.004 K 3.00 0.1 0.12 0.004 L 3.20 0.1 0.13 0.004 M 2.00 0.1 0.08 0.004 N max.5.5 0.2 max.0.22 0.008 O 23.40 0.4 0.92 0.016 P 15.00 0.2 0.59 0.008 Q (A-Contact) 3.60 0.1 0.14 0.004 Q (K-Contact) 3.30 0.1 0.13 0.004 R 2.80 0.2 0.11 0.008 For technical questions, contact: powertron@vishaypg.com www.powertron.de 3 FHR 2-3025 3818 FHR 4-3825 3825H 4618 Powertron SPECIFICATIONS (continued) FHR 2-3025 FHR 2-3818 www.powertron.de 4 Dimension mm tol. (mm) inches tol. (inches) A 24.00 0.2 0.94 0.008 B 30.00 0.2 1.18 0.008 C 1.40 0.4 0.06 0.016 D 4.00 0.1 0.16 0.004 E 27.00 0.2 1.06 0.008 F 15.00 0.2 0.59 0.008 G 1.5x45 0.1 0.06x45 0.004 H 20.32 0.2 0.80 0.008 I (A-Contact) 1.50 0.1 0.06 0.004 I (K-Contact) 1.10 0.1 0.04 0.004 J 1.10 0.1 0.04 0.004 K 3.20 0.1 0.13 0.004 L 2.00 0.1 0.08 0.004 M max.5.5 0.2 max.0.22 0.008 N 30.40 0.4 1.20 0.016 O 15.00 0.2 0.59 0.008 P (A-Contact) 3.60 0.1 0.14 0.004 P (K-Contact) 3.30 0.1 0.13 0.004 Q 2.80 0.2 0.11 0.008 Dimension mm tol. (mm) inches tol. (inches) A 17.00 0.2 0.67 0.008 B 38.00 0.3 1.50 0.012 C 1.40 0.4 0.06 0.016 D 8.50 0.2 0.33 0.008 E 32.00 0.3 1.26 0.012 F 27.00 0.2 1.06 0.008 G 1.5x45 0.1 0.06x45 0.004 H 20.32 0.2 0.80 0.008 I (A-Contact) 1.50 0.1 0.06 0.004 I (K-Contact) 1.10 0.1 0.04 0.004 J 1.10 0.1 0.04 0.004 K 3.20 0.1 0.13 0.004 L 2.00 0.1 0.08 0.004 M max.5.5 0.2 max.0.22 0.008 N 23.40 0.4 0.92 0.016 O 15.00 0.2 0.59 0.008 P (A-Contact) 3.60 0.1 0.14 0.004 P (K-Contact) 3.30 0.1 0.13 0.004 Q 2.80 0.2 0.11 0.008 For technical questions, contact: powertron@vishaypg.com Document Number: 64206 Revision: 20-09-10 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. 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