vishay foil resistors , 63 lincoln highway, p.o. box 4004, malvern, pa 19355-0988 ? phone (610) 644-1300 app. eng. phone (610) 251-5289 ? app. eng. fax (610) 640-4487 ? sales phone (610) 251-5842 ? sales fax (610) 640-9081 p r e c i s i o n b u l k m e t a l ? f o i l t e c h n o l o g y 33 weight = 1.2 gms max. * maximum specifications. higher values available. 0.1 ohms available soon. vishay models vpr220 and vpr221 precision foil power resistors in to 220 configuration models vpr220 and vpr221, made from vishay bulk metal ? foil, offer low tcr, high stability, tight tolerance and fast response time in a small, molded resistor. model vpr220 is a 2 lead de- vice. model vpr221 is a 4 lead kelvin connected device. the 4 leaded version is highly recommended for precision applications requiring ohmic values of 100r or less. features ? power: 8 watts chassis mounted (per mil-r-39009) ? load life stability: 0.05% maximum d r at rated power and temperature for 2,000 hours ? temperature coefficient of resistance: to 5 ppm/ c ? resistance range: 0.5 to 10k w ? tolerance: to 0.01% ? low thermal emf: 0.15 m v/ c maximum (lead effect) ? non-inductive construction ? heat sink is isolated figure 1 - vpr220 dimensions 0 . 400 0 . 010 (10.16 0.25) vishay vpr220 1k0 1% 9801 0.245 0.010 (6.22 0.25) 0.141 0.005 dia (3.58 0.13) 0.540 0.040 (13.72 1.02) 0.030 0.002 (0.76 0.05) 0.200 0.005 (5.08 0.13) 0.115 0.005 (2.92 0.13) 0.050 0.005 (1.27 0.13) 0.150 0.008 (3.81 0.2) 0.615 max (15.62) 0.078 0.005 (1.98 0.13) 0.015 0.002 (0.38 0.05) 0.050 0.005 (1.27 0.13) 0.200 0.030 (5.08 0.76) resistance tightest tcr* range ( w ) resistance tolerance 50 to 10k 0.01% 5 ppm/ c 25 to <50 0.02% 7 ppm/ c 10 to <25 0.05% 10 ppm/ c 5 to <10 0.1% 13 ppm/ c weight = 1 gm max. * maximum specifications. lower values available but not recommended due to high tcr. figure 2 - vpr221 dimensions resistance tightest tcr* range ( w ) resistance tolerance 10 to 500 0.01% 5 ppm/ c 1 to <10 0.02% 5 ppm/ c 0.5 to <1 0.05% 5 ppm/ c e 2 0.050 0.005 (1.27 0.13) 0.150 0.008 (3.81 0.2) 0.615 max (15.62) 0.078 0.005 (1.98 0.13) 0.015 0.002 (0.38 0.05) 0.030 0.002 (0.76 0.05) 0.100 0.005 (2.54 0.13) 0.400 0.010 (10.16 0.25) vishay vpr221 1k0 1% 9801 0.245 0.010 (6.22 0.25) 0.141 0.005 dia (3.58 0.13) 0.540 0.040 (13.72 1.02) 0.115 0.005 (2.92 0.13) 0.050 0.005 (1.27 0.13) 0.200 0.030 (5.08 0.76) e 1 i 2 i 1 through hole
p r e c i s i o n b u l k m e t a l ? f o i l t e c h n o l o g y vishay foil resistors , 63 lincoln highway, p.o. box 4004, malvern, pa 19355-0988 ? phone (610) 644-1300 app. eng. phone (610) 251-5289 ? app. eng. fax (610) 640-4487 ? sales phone (610) 251-5842 ? sales fax (610) 640-9081 34 vishay models vpr220 and vpr221 precision foil power resistors in to 220 configuration table 1 - specifications load life stability at 2,000 hrs shelf life stability power rating @ +25 c current noise high frequency operation rise/decay time inductance 4 (l) capacitance (c) voltage coefficient 5 operating temperature range maximum working voltage thermal emf 6 0.05% max d r under full rated power @ +25 c 0.0025% d r/yr 8 watts or 3 amps 2 on heat sink 3 1.5 watts or 3 amps 2 in free air further derating not necesary. <0.010 m v (rms)/volt of applied voltage (C40 db) 0.2 ns @ 1 w 0.1 m h maximum: 0.03 m h typical 1 1.0 pf maximum: 0.5 pf typical 1 <0.1 ppm/v C55 c to +150 c 300 v. not to exceed power rating. 0.15 m v/ c maximum (lead effect) notes: 1. maximum is 1.0% a.q.l. standard for all specifications except tcr. typical is a designers reference which represents that 85% of the units supplied, over a long period of time, will be at least the figure shown or better. 2. whichever is lower. 3. heat sink chassis dimensions and requirements per mil-r-39009/1b: dimension inches mm l 6.00 152.4 w 4.00 101.6 h 2.00 50.8 t 0.04 1.0 4. inductance (l) due mainly to the leads. 5. the resolution limit of existing test equipment (within the measurement capability of the equipment, essentially zero). 6. m v/ c relates to emf due to lead temperature difference. figure 3 - vpr221s dimensions 0.030 0.002 (0.76 0.05) 0.400 0.010 (10.16 0.25) 0.615 max (15.62) 0.141 0.005 dia (3.58 0.13) 0.540 0.040 (13.72 1.02) 0.115 0.005 (2.92 0.13) 0.050 0.005 (1.27 0.13) 0.200 (5.08) ref 0.365 (9.271) ref 0.050 0.005 (1.27 0.13) 0.150 0.008 (3.81 0.2) 0.015 0.002 (0.381 0.05) 0.078 0.005 (1.98 0.13) heat sink 0.695 0.010 (17.65 0.25) 0.090 0.010 (2.286 0.25) 0.090 (2.286) ref 0.110 (2.794) ref flush with heat sink within 0.002 ( 0.051) before forming after forming solder coated copper vpr220s dimensions similar. +100 +75 +50 +25 0 +25 +50 +75 +100 +125 +150 ambient temperature ( c) percent of rated power figure 4 - power derating curve how to order vpr220 and vpr221 parts: specify vishay vpr220 or vpr221 resistors as follows: example: vpr221 5r0000 1.0% model no. resistance value tolerance specify vishay vpr220s or vpr221s for surface mount resistors as follows: example: vpr221s 5r0000 1.0% model no. resistance value tolerance resistance value, in ohms, is expressed by a series of 6 characters, 5 of which represent significant digits while the 6th is a dual purpose letter that designates both the multiplier and the location of the comma or decimal. resistance letter multiplier range designator factor example 0.5 w to < 1k w r x1 100r01 = 100.01 w 1k w to 10k w k x10 3 5k2310 = 5,231 w through hole
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