Ultra-Precision Power Resistor (10 Watts) TCR, Resistance Range, Tolerance, Rated Power PC PB Type PB TCR (ppm/C) -55C to +125C Resistance Range () 015 (W) 0.4 to 1 015 (W) 05 (X) 02.5 (Y) 015 (W) 05 (X) 015 (W) 05 (X) 02.5 (Y) PB X 50R000 B Tolerance Resistance Value TCR Type Resistance value, in ohm, is expressed by a series of six characters, five of which represent significant digits. The sixth R or K is a dual-purpose letter that designates both the value range (R for ohmic; K for kilo-ohm) and the location of decimal point. 0.1 to 5 (B, D, F, G, J) 10 to 25 0.05 to 5 (A, B, D, F, G, J) 25 to 50 0.02 to 5 (Q, A, B, D, F, G, J) 0.1 to 5 0.1 to 5 (B, D, F, G, J) 5 to 10 0.05 to 5 (A, B, D, F, G, J) 10 to 25 0.02 to 5 (Q, A, B, D, F, G, J) 25 to 100 0.01 to 5 (T, Q, A, B, D, F, G, J) Symbols in parentheses are for type number composition. *Resistance figures for type PB are the values obtained by measuring the leads at point 12.73.2mm away from the root, but in case of resistance below 10 ohm, the values at 5.080.6mm away. **For heat sinking, an aluminum chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used. Power Derating Curve (%) 100 80 60 T W 40 T1 20 L F L2 25 L1 d PB 20 D T W L V L2 I L1 V F I d PC T1 D Schematic of PC I V I V 4-Terminal Connection Type L L1 L2 W T T1 F D d PB PC 40.00.2 20.00.2 30.00.5 20.00.2 5.00.2 1.00.1 15.00.5 3010 0.4 0.80.05 1.20.05 Dimensions in mm 24 On heat sink** 0.5 to 5 (D, F, G, J) egatnecreP rewoP detaR Configuration 2 10 PC Example: 0.5 to 5 (D, F, G, J) 5 to 10 0.05 to 0.1 Rated Power (W) at 25C 1 to 5 (F, G, J) 1 to 5 50 to 50k 0.01 to 5 (T, Q, A, B, D, F, G, J) 0.002 to 0.05 0.5 to 5 (D, F, G, J) 015 (W) Composition of Type Number Resistance Tolerance (%)* 40 60 80 100 120 Ambient Temperature 140 155 160 (C) Performance Parameters MIL-R-39009 Specification Test Condition ALPHA Typical Test Data 25C -55C to +155C 750V PB=5A, PC=32A Maximum Rated Operating Temperature Working Temperature Range Maximum Working Voltage Maximum Working Current Power Conditioning 25C, Rated Voltage, 96 hrs. Low Temperature Storage Dielectric Withstanding Voltage Insulation Resistance Low Temperature Operation Overload Moisture Resistance Terminal Strength -55C, No Load, 24 hrs. Atmospheric: AC 1KV, 1 min. Barometric: AC 500V, 1min. DC 500V, 2 min. -55C, Rated Voltage Rated Voltage x 2.5, 5 sec. +65C to -10C, 90% RH to 98% RH, Rated Voltage, 10 cycles (240 hrs.) 2.27kg (5 pounds),10 sec. Shock Vibration, High Frequency 0.2% 0.02% 0.3% 0.2% over 10,000M 0.3% 0.3% 0.5% 0.2% 0.005% 0.005% over 10,000M 0.005% 0.01% 0.05% 0.005% 100G, 6ms., Sawtooth Wave, X, Y, Z, each 3 shocks 20G, 10Hz to 2,000Hz to 10Hz, 20 min., X, Y, Z, each 4 hrs. 0.2% 0.2% 0.005% 0.005% Life 25C, Rated Power, 1.5 hr. - ON, 0.5 hr. - OFF, 2,000 hrs. 1.0% 0.01% High Temperature Exposure 155C, No Load, 2,000 hrs. Solderability 245C, 5 sec. Frequency Characteristics 1.0% 0.01% over 95% coverage over 95% coverage Temperature of Resistor Surface 0.4 (%) Spots for Temperature Measurement (in still air) A: Mold Surface Screwed Down B: Element Surface PB 150 T (C) 1 70 B (19.2C/W) Aluminum Chassis A (15.5C/W) 152.4mm (L) x 101.6mm (W) x 50.8mm (H) x 1.0mm (T) )CD(R/)CA(R 60 10 100 In Free Air 50 B (4.9C/W) esiR erutarepmeT 100 On Aluminum Chassis 40 2k A (3.4C/W) 30 20 50 10 1 5 10 Frequency 50 100 (MHz) Four-Terminal Resistor 1 2 3 4 (W) 5 6 7 8 9 10 Applied Power Affect of PB type lead for resistance value and TCR 0.8 Solder-Plated Copper/L=1cm (%) (ppm/C) 1 i i r1 r2 I I r3 V 0.00 1 0.000 1 0.0000 r4 Resistance Value 1 R TC 1 0 lanoitiddA 0.0 Four-Terminal Resistor 1 00 CT 0. 1 R eulaV ecnatsiseR lanoitiddA For low ohmic resistor (less than 10 ohm), the resistance value and TCR of the copper lead increases overall resistance value. Four-terminal (Kelvin) connection is recommended per the following figure. Loading current at voltage and current terminals (V, I) causes measurement error. 1 0. 1 0.0 1 0. 1 1 0 00 o inal Resistance Value 1 N V 1 0.00 1 m ( ) 1 1k Resistance Value of Lead: 0.36 c R of Lead: 3 00 / m TC ,9 ppm/C 25