3R-250 参数 Datasheet PDF下载

3R-250

250Watt Mountable Non-Inductive,

High Frequency Resistors

Motor Controls, High Energy, RF, High Voltage, Inverters, Pulse & Plasma,

Non-Inductive Powers

3R-250 Non-Inductive design these elements are ideally suites for high frequency and pulse load applications. By direct 

mounting on a heatsink significant cost advantages can be reailzed for power Appliation from 100w to 600w.  3R-250 can 

be supplied in a 2-terminal   Main applications are Variable speed Drives, ship, train, RF Termination, Power Supplies, Control 

Devices, Telecom, Robotics, Motor Controls Dynamic Braking, and other switching designs.

3R-250 Non-Inductive 250Watt

Mountable, High Frequency Resistors

·Heat Sink Mountable

with M4 Screw

·RF Terminal

·Shunt

·Inverter

·Moter Braking

·Pulse & Plasma

S

PECIFICATIONS

Resistance Values :

1R0 to 2Megohm others on

rquest

Resistance Tolerance :

± 10% Std. ,1%,2%,5%

available on request.

Temperature Coefficient :

± 100ppm/°C typ.

(others upon request)

Maximum Working Voltage :

5,000V DC, higher

voltage on request, not execeeding max. power

Single Shot Voltage :

Up to 12kV at std. wave

(1.5/50

㎲)

Insulation Resistance :

10GΩ min. at 500V

Creeping Distance :

42mm min.

Inductance :≤50

nH

Capacity/Ground :

≤110pF

Capacity/Resistive :

≤40pF

Operation Temperature :

-55°C to +155°C

Max. Torque for Contacts :

2 N.m

Max. Torque for Mounting :

1.8 N.m

Power Rating :

250W at 50°C Tap Temperature

Higher power :

600Watt at 5°C Tap Temperature

Dielectric Strength :

Up to 12 kV

Termination to Contacts :

M5 Screws

Required thermal transfer compound of-heat

conductivity :

1 W/°C

Required flatness of heat sink :

≤ 0.05mm

Roughness of the Heatsink surface :

≤ 6.4㎛.

Isolation Voltage(Terminal to Heatsink) :

7k Vrms

cf.: The described specifications & dimensions subject to change without notice.

D

IEMENSION

D

ERATING CURVE

Rated Power or Voltage%

00

80

60

40

20

0

25

50

75

00

25

50

75

Tap Temperature (˚C)

 

 

Willow Technologies Ltd.

Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom.

info@willow.co.uk

http://www.willow.co.uk

+ 44 (0) 1342 835234

+ 44 (0) 1342 834306