WIRE WOUND RESISTORS CERAMIC ENCASED TYPE TM HCA/HCV Inorganic Fire Retardant Encapsulant Flame Proof High Temperature Ceramic Housing SERIES POWER TYPE Ceramic Encased Wire Wound Resistors Fire Proof Mechanically Crimped Termination Assembly Alloy Wire Wound Element On Fibre Glass/Ceramic Substrate Very high degree of insulation Low surface temperature 1 W to 20 W R10 to 56K PHYSICAL CONFIGURATION HCA SERIES LM d H 35+3 HTR TYPE C-1A C-1 C-2 C-3 C-5 C-7 C-10 C-15 C-20 35+3 L POWER RATING at 70C 1W 1W 2W 3W 5W 7W 10W 15W (250C) 20W (250C) W DIMENSIONS (mm) L +1.5 W +1 RESISTANCE TYPICAL RANGE WT. min max PER PC d LM H (gms) +1 +0.05 +1 For resistance values less than R10 and tolerance less than +2% please measure resistance over centered length LM. 13.0 5.5 5.5 15.0 7.5 6.5 17.5 7.5 7.0 22.0 8.0 8.0 22.0 9.5 9.5 35.0 9.5 9.5 48.0 9.5 9.5 48.0 12.5 12.5 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1.0 35 35 40 45 45 55 70 70 R05 R05 R05 R05 R05 R05 R05 R05 2K7 4K7 7K5 11K 11K 30K 43K 43K 1.4 1.9 2.5 3.8 5.1 7.8 10.8 17.8 63.5 12.5 12.5 1.0 85 R10 56K 22.0 ! Pulse type resistors are available in this series by substituting the resistance element and the substrate from fibre glass to ceramic. ! For further information please refer to "Understanding pulse & over load capability of wire wound resistors". In case a tailor-made pulse resistor is required, please refer to "Questionnaire of data required" and provide data accordingly. HCA/HCV WIRE WOUND RESISTORS CERAMIC ENCASED TYPE TM PHYSICAL CONFIGURATION L1 W1 L3 H1 H3 H2 0.5 W2 d L4 W3 HCV SERIES HTR POWER TYPE RATING AT 70C DIMENSIONS (mm) L1 L3 L4 H1 H2 H3 RESISTANCE RANGE W1 W3 d+0.1 min W2 max TYPICAL WT PER PC (gms) CV-7 7 60+1.5 5+0.5 7+1 2.1+0.15 11+1 9.5+1 10+1 2.1+0.15 10+1 0.8 R10 30K 10.0 CV-10 10 67+1.5 5+0.5 7+1 2.1+0.15 11+1 9.5+1 10+1 2.1+0.15 10+1 0.8 R10 43K 13.3 CV-15 15 62.5+2 4.5+0.2 6.5+1 2.5+0.15 14+1 12.5+1.2 13+1.2 2.5+0.15 13+1 1.0 (25C) R10 43K 22.1 CV-20 20 (25C) R10 56K 26.4 78+2 4.5+0.2 6.5+1 2.5+0.15 14+1 12.5+1.2 13+1.2 2.5+0.15 13+1 1.0 In order to facilitate vertical mounting of the large 7W to 20W resistors in HCA series on heavily populated PCB's they can be supplied on request with mounting brackets as shown in HCV series. ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Resistance tolerance Rated ambient temperature [See derating curve] Dielectric withstanding voltage Insulation resistance Temperature co-efficient Performance Requirements + 10% [K]; + 5% [J]; +3% [H]; +2% [G + 1% [F] upto 10W, full power dissipation at 70C 15W/20W full power dissipation at 25C Max DR +[2% + R05] > 1000 M [minimum] +100 ppm/ C [> 10R] +80 ppm/ C [< 10R] +450 ppm/ C [< 1R0] Short time overload Max DR +[2% + R05] Moisture resistance Max DR +[3% + R05] Load life Ambient operating temperature range Flame test Max DR <[5% + R05] -40C to +155C Specifications laid down by UL have been met satisfactorily. DERATING CURVE Rated dissipation [%] Test 25C 70C Up to 10W 120 100 80 40 15W/20W 0 40 80 120 160 200 240 275 Ambient Temperature [C] Max 155C TYPICAL APPLICATIONS HCA/HCV series resistors are almost universally used in the far east for almost all audio, TV and Industrial Equipment applications. This series enjoys the following distinct advantages over normal coated resistors : 1) As the resistive element is hermetically sealed in a ceramic case using a cement which enjoys flame retardant properties even at high overload no damage can be caused to neighbouring components. 2) Due to very high degree of insulation and low surface temperature, these resistors can be mounted with their bodies relatively closer to the PCB. 3) These resistors are also commonly referred to in the far east as cement resistors owing to the nature of their construction. 4) In certain markets these resistors are also wrongly called fusible resistors. 5) The Impulse type variant in this series is widely used for pulse and surge applications. ORDERING INFORMATION HCA [HCV] C-7 [CV-7] 100R J TOLERANCE RESISTANCE VALUE HTR TYPE SERIES Note : 1) In case Pulse type is required please suffix HTR type with I eg. C-5I. 2) Due to recent technological advances, the ceramic cases used may be steatite ceramic or corderite ceramic or high alumina ceramic depending on the nature of the application. Hence the ceramic cases may be off-white or variations of brown and variations of grey; colours which are inherent to these ceramic materials. 3) Types C-10, C-15 and C-20 may have cases with bottom bumps as per international practice. HCA/HCV WIRE WOUND RESISTORS CERAMIC ENCASED TYPE TM