general note irc reserves the right to make changes in product speci?cation without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. a subsidiary of tt electronics plc ? 4222 south staples street ? corpus christi texas 78411 usa wire and film technologies division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? website: www.irctt.com general purpose carbon film resistors electrical data cf series ? high stability performance ? uniformity of all electrical parameters ? auto sequencing/insertion compatible ? ideal for commercial/industrial applications environmental data tested per mil-std-202 cf 1/8 cf 1/4 cf 1/2 power rating (watts) at 70c 1/8 1/4 1/2 derated to 0 load at 155c maximum working voltage 200v 250v 350v operating temperature range -55c to +155c resistance range (5%) 1.0 ? - 22 meg (2%) 10 ? - 1 meg 10 ? - 4.7 meg 10 ? - 4.7 meg cf 1/8 cf 1/4 cf 1/2 moisture resistance <100k (3% + 0.05 ? ) >100k (5% + 0.05 ? ) thermal shock 0.5% load life at 70c - 1000 hours <100k (2% + 0.05 ? ) <100k (3% + 0.05 ? ) shock and vibration 0.2% resistance to soldering heat 0.5% terminal strength 0.5% dielectric withstand voltage 300 volts rms min. 500 volts rms min. 700 volts rms min. maximum pulse voltage 400v 600v 700v insulation resistance 10,000 meg min. voltage coef?cient -10 ppm/vmax. short time overload 0.75% cf series issue august 2008 sheet 1 of 3
? 4222 south staples street ? corpus christi texas 78411 usa wire and film technologies division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? website: www.irctt.com physical data general purpose carbon film resistors dimensions (inches and (mm)) dimension cf 1/8 cf 1/4 cf 1/2 a 1.10 .08 (28.0 2.0) b 0.13 + .01/-.00 (3.2 + 0.2/-0.0) 0.24 .01 (6.0 0.3) 0.33 .02 (8.5 0.5) c 0.018 .001 (0.45 0.02) 0.022 .001 (0.55 0.03) 0.026 .002 (0.65 0.05) d 0.07 .01 (1.8 0.15) 0.09 .01 (2.3 0.2) 0.11 .01 (2.8 0.3) construction 1. color bands. the resistors are permanently color banded for resistance value and tolerance in accordance with eia speci?cations. 2. helixing. the units are helixed to a predetermined base to ?nal value ratio to obtain the best tcr, noise and stability characteristics. 3. film. carbon-?lm resistors have a homogeneous ?lm of pure carbon deposited by a pyrolitic process at carefully controlled temperatures. 4. substrates. the substrates are of a proprietary non alkaline ceramic, prepared and processed under exacting conditions to guarantee the utmost in uniformity and surface characteristics. 5. insulation. the resistors are coated with multiple layers of a baked-on ?re-retardant synthetic resin which provides the units with a high degree of mechanical and electrical protection in the most adverse operating conditions. 6. terminations. positive contact is provided to the resistance element by precision-made end caps. the lead wires are attached by using proprietary welding techniques. b c a a d 1 2 3 4 5 6 cf series issue august 2008 sheet 2 of 3
? 4222 south staples street ? corpus christi texas 78411 usa wire and film technologies division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? website: www.irctt.com performance curves sample part no. irc type cf size resistance value 2 digit range and 1 digit multiplier tolerance g = 2% j = 5% k = 10% packaging blk = bulk ordering data cf - 1/4 102 j blk general purpose carbon film resistors temperature coef?cient (typical) derating curve (typical) current noise (typical) 100 80 60 40 20 0 20 40 pe r cent rated load (%) ambient t emperature (c) 60 120 140 160 0 80 100 -250 -500 -750 -1000 -1250 -1500 -1750 -2000 10 100 1k 10k 100k 1m 10m ambient t emperature (c) te mperature coefficient (ppm/c) 0 -10 -20 -30 -40 100 1k 10k 100k 1m 10m resistance (ohms) noise inde x (db) 1. 0 0.32 0.10 0.032 0.010 noise v oltage (v/v) cf series issue august 2008 sheet 3 of 3
|
