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| Telecommunications Line Feed Resistors ALFR-2B Series * * * * * * * * 1% tolerance Auto-insertable, small size Withstands lightning surges 4.8 ohm to 1600 ohm range Opens safely under power cross Flameproof inorganic construction Meets all test and specifications of GR-1089 & UL-497A Meets FCC and EIA requirements and is UL-497A approved Environmental Data Characteristics Wattage Temperature Coefficient Tolerance Load Life (1000 hours) Temperature Cycling Short Time Overload (5x RW for 10 sec.) Moisture Load Resistance Range Lightning Surge (1000V-10/1000sec.) 25 negative & 25 positive surges (2 minute intervals) Limits-ALFR-2B 2 watts 50 ppm/C 1% and 5% 1%R maximum 1%R maximum 1%R maximum 1%R maximum 4.8 to 1600 ohms No failures DESIGN & CONSTRUCTION: The Line Feed Resistor is a tight tolerance, stable resistor which has the additional capability to withstand both in rush currents and certain lightning pulse surges but would fuse safely when exposed to overload conditions such as the 600 volt power cross specified in GR-1089. General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC's own data and is considered accurate at time of going to print. Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com A subsidiary of TT electronics plc ALFR-2B Series Issue October 2008 Sheet 1 of 2 Telecommunications Line Feed Resistors Physical Data The four (4) terminal leads shall be in the line to a tolerance to 0.015 inch. The lead spacing dimensions as specified, shall be measures from the tip of the lead. The leads may have a 15 draft relative to the protector body. 1.045 0.020 0.030 Meniscus Permitted 0.450 0.020 0.125 0.020 0.150 0.020 0.025 0.100 0.015 1 2 0.700 0.015 0.900 0.015 3 0.070 Typ. 0.265 0.020 0.138 0.020 0.021 Lead Dia. 0.032 Lead Dia. Ordering Data Sample Part No. IRC Type ALFR ALFR - 2B 1000 F Power 2B = 2 watts Resistance Value Tolerance F = 1%, J = 5% How to use the ALFR-2B: Leads 1 & 2 can be interchanged with leads 3 & 4. The part can then be inserted into the circuit in either orientation. Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com ALFR-2B Series Issue October 2008 Sheet 2 of 2 |
Price & Availability of ALFR-2B
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