WIRE WOUND RESISTORS SILICONE COATED TYPE TM HFA SERIES Alloy Resistance Wire wound On Fibre Glass Core FIBRE GLASS SUBSTRATE Silicone Coated Wire Wound Resistor Shatter Proof Low Cost Due To Automation Flame Retardant Silicone Coating Mechanically Crimped Termination Assembly Especially designed for kitchen appliances sector. High positive temperature co-efficient resistors available. Available uncoated if required. APPLICABLE STANDARDS IS - 8909 and IEC - Pub 266 HTR TYPE PHYSICAL CONFIGURATION L d D I F-1 F-2 F-3 F-5 F-7 F-9 F-10 POWER RATING at 70C 1W 2W 3W 5W 7W 9W 10W DIMENSIONS (mm) L +2 D +0.5 l +2 13.0 16.0 18.0 30.0 39.0 45.0 54.0 4.5 4.5 5.2 5.2 5.2 5.2 5.2 38 38 38 38 38 38 38 RESISTANCE TYPICAL RANGE WT. min max PER PC d (gms) +0.05 0.8 0.8 0.8 0.8 0.8 0.8 0.8 R05 R07 R10 R10 R10 R10 R10 9K1 12K 15K 27K 39K 47K 51K 1.18 1.20 1.24 1.73 2.03 2.22 2.34 ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Performance Requirements Resistance tolerance + 10% [K]; + 5% [J] Rated ambient temperature at 70C full power dissipation [ see derating curve] Temperature co-efficient + 100 ppm/ C [> 100R] + 80 ppm/ C [< 100R] + 450 ppm/ C [< 1R0] Short time overload Max DR + [ 2%+R05] Moisture Resistance Max DR + [5%+R05] Load life Max DR + [5%+R05] Ambient operating temperature range. -40C to +155C DERATING CURVE Rated Dissipation [%] Test 70C 120 100 80 40 0 40 80 120 160 200 Ambient Temperature [C] 240 275 TYPICAL APPLICATIONS HFA WIRE WOUND RESISTORS SILICONE COATED TYPE TM HFA series of resistors were developed to provide a reliable but low cost alternative to the kitchen appliances sector where medium levels of power are required to be dissipated in the confines of a PCB and where close tolerance is not a criteria for selection. This cost reduction is achieved using a sophisticated automatic plant where the resistance element is uniformly wound onto a fibre glass core which is shatterproof. Finally the sub-assembly is conformally coated with a special silicone cement coating which cannot drip even at high overloads or left uncoated if required by the customer. Due to this method of construction, resistors in this series particularly above 7W should be suitably derated (about 35%) and a clearance of say about 5 mm from the PCB be kept if found necessary. Depending on application the resistors leads may be tin plated Copper Weld(R) instead of tin plated copper. ORDERING INFORMATION HFA F5 50R J TOLERANCE RESISTANCE VALUE HTR TYPE SERIES Note : 1) The leads of the resistor can be bent and cut as per requirements for quick PCB mounting. Please send detailed drawings of the type of preforming required. 2) Types F1, F2 & F3 can be supplied in taped form. Please refer to tape/ammo pack specifications. Tape/Reel on request. The Words - "Applicable Standards" do not necessarily signify certification to that standard, however the tests mentioned are carried out on the broad based guidelines set out in these standards.