riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/17 specifications ? high power density ? 0.5 ohm to 1 mohm ? very low inductance ? vibraton proof ? applications: power supplies, motor controls, snubber resistors, load banks, c robotics high power resistors / high voltage resistors type pfu 800 pfu 1000 conditions rated power 800 1000 at flange temperature -55 to +75 c short time overload 1000 1200 5 seconds thermal resistance 0.10 c / w from resistor to flange resistance range 0.5 ohm to 1 mohm nominal resistance e24+ additionally , 2.0 and 5.0 tcr +/- 100 ppm/k (a) 1 ohm to 1 mohm, +/- 200ppm/c < 1 ohm , for -55 to +155 c tolerance +/- 5% (j) operation temperature -55 to +175 c at resistor element surface max applied voltage v = (p ? r) (5000v max) p rated power (w), r - resistance value (ohm), v - voltage (v) insulation voltage 8000 v-30hz 8000 v-50hz 60 seconds between terminals and flange. leak current below 0.5 ma capacitance 73 pf terminal to flange inductance 108 nh terminal to terminal capacitance 25 pf terminal to terminal creep distance 42 mm air distance 14 mm load life r +/- 0.40% continuous power 1000 hours humidity r +/- 0.25% 60 c, 90 to 95% rh, dc 0.1w, 1000 hours temperature cycle r +/- 0.20% -55 c, 30 min, +155 c 30 min, 5 cycles insulation resistance over 1g ohm vibration r +/- 0.25% see note below flammability ul94v-0 for resistor body weight 120 grams pfu series 1000 w & 800 w note: iec60068 2-6 displacement 0.75 mm or acceleration 100m/j2 10hz to 54hz sweep, 10 cycles x,y,z direction
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/17 specifications (continued) recommended: mounting torque: 1.8nm (m4) contact torque: 2.0 nm (m5) high power resistors / high voltage resistors pfu series 1000 w & 800 w 5 8 . 0 + / - 0 . 2 3 4 . 0 + / - 0 . 2 6 0 . 0 + / - 0 . 2 3 6 . 0 + / - 0 . 2 5 7 . 0 + / - 0 . 2 6 9 . 0 + / - 0 . 2 2 8 . 0 + / - 0 . 5 1 5 . 0 + / - 0 . 2 2 5 . 0 + / - 0 . 2 s c r e w t e r m i n a l s h o u s i n g c o n d u c t o r r e s i s t o r i n s u l a t i o n f l a n g e p l a t e 2 -m5 screw-10mm pfu800 / pfu1000 power rating notes - the pfu series power film resistors must be attached to a suitable heatsink. the maximum internal resistor temperature is 175c. liquid cooling highly recommended . to specify an appropriate heatsink use the following formula : where: r h = thermal resistance of heatsink ( k/w ) r r = thermal resistance of resistor ( k/w ) t max = maximum temperature of resistor t a = ambient temperature of heatsink ( c ) p = power through resistor ( w ) ( * ) r p t p r t h max r a = - - h h
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/17 specifications (continued) ordering information part description: part type - terminal style - resistance - tolerance pfu800 10 ohms 5% +175c +75c derating curve % power rating pfu800 100 80 60 40 20 0 -50 0 +50 +100 +150 +200 800w 100kw pulse energy durability pulse peak power (w) 10m 1m 100k 10k 1k 100 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100 pfu800-100 j tenative continuous-pulse allowance at duty 0.01. load life test will be necessary in actual equipment, because curve may be changed by resistance, repetition, duty and perating temperature. (seconds) flange temperature (c) +65c +175c -50 0 +50 +100 +150 +200 flange temperature (c) 100 80 60 40 20 0 % power rating derating curve pfu1000 pulse peak power (w) 100kw 1000w pulse energy durability pfu1000-100 j tenative continuous-pulse allowance at duty 0.01. load life test will be necessary in actual equipment, because curve may be changed by resistance, repetition, duty and perating temperature. 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100 10m 1m 100k 10k 1k 100 (seconds) 100kw 1000w high power resistors / high voltage resistors pfu series 1000 w & 800 w
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