wire and film technologies 736 greenway road po box 1860 boone, north carolina 28607-1860 tel: 704-264-8861 fax: 704-264-8865 1 iso-9001 registered irc type a 0.010 (.25) b 0.008 (.20) c 0.002 (.05) d 0.126 (3.2) spf 0.562 (14.3) 0.225 (5.72) 0.032 (.813) 1.50 (38.1) sph cru 2 rc32/rc42 0.05 w to 2400 w 5%, 10% 2 watt @ 70c 1 watt @ 115c derating to 0 @ 160c ? pr 10,000 meg 100 meg 1000 v 625v 145c @ 2 watts 5% negligible irc type eia rs-344 style mil-r-11 style resistance - std. tolerance - std. power rating max. continuous working voltage min. insulation dry resistance wet min. dielectric atm withstanding volts (rms) reduced pressure hotspot temperature rise typical load life current noise general-purpose failsafe molded wirewound resistor sph/spf series drop-in replacement for bwh/bwf 2 watt rated with 1 watt dimensions 5%, 10% tolerance 0.5 ohm to 2400 ohms tcr's as low as 150 ppm/c std (custom tc's available) weldable and solderable leads manufactured in barbados. 2 3 4 1 specifications: dimensions (inches and (mm)) : da bc sph 0.562 (14.3) 0.225 (5.72) 0.032 (.813) 1.50 (38.1) 1. resistive element all resistor types have resistance alloy winding on a braided fiberglass substrate. intermediate silicone coatings are used to enhance processibility and to provide protection to the resistive element. 2. termination the sph and spf resistors are termi- nated using an alloy coated copper flashed steel lead welded to a cap of the same material. this termination assembly is mechanically crimped, utilizing an improved crimp design, to the resistive element. 3. encapsulation the sph and spf are encapsulated utilizing a compression molded phenolic plastic material. the spf has a flame- resistance coating applied over the resistive element to provide flammability protection when destructive overloads may occur. 4. marking all products are marked utilizing heat and solvent resistant color code bands consistent with eia/mil requirements. the first band is double width to desig- nate wirewound construction. a fifth band, blue in color, is used for flameproof identification. sphf cru 2 rc32/rc42 0.1 w to 1000 w 5%, 10% 2 watt @ 70c 1 watt @ 115c derating to 0 @ 160c ? pr 10,000 meg 100 meg 1000 v 625v 145c @ 2 watts 5% negligible see notes below
wire and film technologies 736 greenway road po box 1860 boone, north carolina 28607-1860 tel: 704-264-8861 fax: 704-264-8865 2 iso-9001 registered spf 0.10 w 1700 0.11 w - 0.16 w 1000 0.18 w - 0.68 w 800 0.75 w - 1000 w 400 700v 5% 5% 5% 5% 5% 5% 5% no failures sph 0.05 w - 0.16 w 1000 0.18 w - 0.68 w 800 0.75 w - 2400 w 400 700v 5% 5% 5% 5% 5% 5% 5% no failures test temperature coefficient (ppm)* dielectric withstanding voltage (rms) momentary overload low temperature operation temperature cycle humidity load life terminal strength resistance to solder heat solderability sph power derating: spf typical fusing: spf power derating: sph and spf temperature rise: how to order: sample part no.: sph-2 150 w w w w w 5% irc type power resistance range tolerance power (watts) power (watts) ambient temperature (c) ambient temperature (c) time (seconds) power (watts) sph/spf characteristics (typical performance): *all ppm levels listed are maximum. 0 50 100 160 200 0 0.5 1.0 1.5 2.0 2.5 70 150 0 50 100 200 0 0.5 1.0 1.5 2.0 2.5 70 150 0 20406080100 0 15 20 25 2 1000 ohm 100 ohm 10 ohm 1 ohm 0.1 ohm 5 10 0 0.5 1.0 1.5 2.0 0 25 50 75 100 125 150 power (watts) power input (watts)
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