WCR www.vishay.com Vishay MCB Water Cooled Wirewound Resistor FEATURES • Direct cooling without heat sink • Better power / volume ratio • Non-inductive optional • 1 WCR = 6 wirewound resistors = 5 thick-film resistors • Up to 6 resistive functions on 1 WCR tube • 1 single supply for several functions (snubber and divider) • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 STANDARD ELECTRICAL SPECIFICATIONS POWER RATING (1) W RESISTANCE RANGE TOLERANCE ±% WCR 30 x 250 1500 4.7 to 56K 5 WCR 38 x 250 2000 4.7 to 56K 5 WCR 38 x 300 2500 4.7 to 56K 5 GLOBAL MODEL Note (1) Water inlet temperature 60 °C with 40 % glycol, flow rate 5 l/min TECHNICAL SPECIFICATIONS PARAMETER Temperature coefficient UNIT RESISTOR CHARACTERISTICS ppm/°C 100 ppm/°C (typical) Maximum working voltage V Up to 3500 V (6600 V on specific request) Operating temperature range °C -55 to +120 GENERAL CHARACTERISTICS Core Winding Hydraulic plugs Coating Ohmic values Inductance Cooling Operating pressure Test pressure Flow CTI Index Creeping distance Clearance distance Electrical connections Ceramic NiCr alloy fully insulated from water Stainless steel (corrosion free) Vitreous enamel or silicone coating (1) E12 (4.7 to 56 k) Non-inductive type on request Industrial or deionized water; coolant mixtures up to 60 % glycol 1 bar to 6 bars 10 bars 5 l/min to 15 l/min > 600 On request On request M3 screw and nut (other on request) Mounting Vertically (recommended) Overload 2 x Pn 10 s (60 °C at 5 l/min) Endurance Pressure drop 1000 cycles Pn 30 s/30 s; variation < 5 % 0.8 bar for WCR 30 mm x 250 mm; 0.25 bar for WCR 38 mm x 250 mm and WCR 38 mm x 300 mm (flow rate 10 l/min) Note For PD reason (withstand) (1) Revision: 03-Sep-14 Document Number: 32500 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 WCR www.vishay.com Vishay MCB DIMENSIONS in millimeters X L f e e Q F c h±2 H W D d1 K E B A U V TYPE 30 x 250 38 x 250 38 x 300 Water pipe diameter Ø8 Ø 10 Ø 10 A 250 250 300 B + 0.5 / - 0 32 44 44 c 3.5 3.5 3.5 C 14.5 14.5 14.5 Dmax. 35 43 43 d1 32 40 40 E 7 9 9 e 8 8 8 f Ø 3.2 Ø 3.2 Ø 3.2 F 11 11 11 Hmax. 54 80 80 h±2 25 40 40 K (1) (1) (1) 304 335 385 Lmax. Ø 30 38 38 Q G 3/8 (2) G 3/8 (2) G 3/8 (2) U 288 292 342 V 20 35 35 W 24 34 34 X±2 286 308 358 Weight 1 kg 1.3 kg 1.5 kg Notes (1) Creeping / clearance on request (2) Other hydraulic connections on request Revision: 03-Sep-14 Document Number: 32500 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 WCR www.vishay.com Vishay MCB SPECIFIC CHARACTERISTICS Axis Title Axis Title 10000 120 100 2nd line Pn - Nominal Power (%) 100 40 % glycol 80 1000 60 40 100 1000 80 1st line 2nd line 0 % glycol 1st line 2nd line 2nd line Pn - Nominal Power (%) 10000 120 60 40 20 100 20 0 10 10 20 30 40 50 60 70 80 0 90 100 10 0 5 10 15 20 Water Inlet Temperature (°C) Flow Rate (l/min) Fig. 1 - Nominal Power Dissipated According to Water Inlet Temperature Pn = f (Water Inlet Temperature) Flow Rate = 5 l/min Fig. 2 - Power Dissipated According to the Flow Rate Pn = f (Flow Rate) Temperature = 60 °C OPTIONS On request PART NUMBER INFORMATION WCR 38 x 250 A 120 5% MODEL TYPE “A” FOR NON-INDUCTIVE VALUE TOLERANCE Revision: 03-Sep-14 Document Number: 32500 3 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21 conform to JEDEC JS709A standards. Revision: 02-Oct-12 1 Document Number: 91000