Datasheet > WCR28250A39000JB

WCR28250A39000JB

更新时间： 2024-09-09 02:52:03

品牌	Logo	应用领域
威世 - VISHAY		/
页数	文件大小	规格书
4页	105K
描述
Water Cooled Wirewound Resistor

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WCR28250A39000JB 数据手册

WCR

Vishay MCB

www.vishay.com

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

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DESIGN SUPPORT TOOLS

Models

Available

STANDARD ELECTRICAL SPECIFICATIONS

POWER RATING ⁽¹⁾

RESISTANCE RANGE

TOLERANCE

ꢀ

GLOBAL MODEL



WCR 30 x 250

WCR 38 x 250

WCR 38 x 300

1500

2000

2500

4.7 to 56K

Note

(1)

Water inlet temperature 60 °C with 40 % glycol, flow rate 5 l/min

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

ppm/°C

RESISTOR CHARACTERISTICS

100 ppm/°C (typical)

Up to 3500 V (6600 V on specific request)

-55 to +120

Temperature coefficient

Maximum working voltage

Operating temperature range

°C

GENERAL CHARACTERISTICS

Core

Ceramic

Winding

Hydraulic plugs

Coating

Ohmic values

Inductance

Cooling

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

Operating pressure

Test pressure

Flow

1 bar to 6 bars

10 bars

5 l/min to 15 l/min

CTI Index

> 600

Creeping distance

Clearance distance

Electrical connections

Mounting

Overload

Endurance

On request

M3 screw and nut (other on request)

Vertically (recommended)

2 x P_n10 s (_{60 °C}at 5 l/min)

1000 cycles P_n30 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)

Pressure drop

Note

(1)

For PD reason (withstand)

Revision: 16-Nov-17

Document Number: 32500

For technical questions, contact: mcbfixedresistors@vishay.com

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

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