Datasheet > UNR4-3425

UNR4-3425

更新时间： 2022-04-23 23:00:11

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描述
High Stability Near Temperature Independency

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数据手册

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UNR4-3425 数据手册

USR UNR 4-3425 4-3825 4-3825H

• High Stability

• Near Temperature

Independency

• Lowest Tolerances

• Low Capacitance and

Inductance

• Customized Resistance

Values

SPECIFICATIONS

ELECTRICAL

USR 4-3425/3825

with addional heatsink 3825H

UNR 4-3425/3825

note¹⁾

0R05 ... 500R

Resistance Range

0R05 ... 500R

other resistance values upon request /

power rating depending on resistor value

Power Rating

3 W (70°C) without heatsink

5 W (20°C) for 3825H

30 W*

50 W*

* with heatsink

Thermal Resistance Rthj-c :

3.5 K/W

2.1 K/W

Tolerances

from 0R05

0.1%, 0.25%, 0.5%, 1%

0.05%, 0.1%, 0.25%, 0.5%, 1%

0.01%, 0.02%, 0.05%, 0.1%, 0.25%, 0.5%, 1%

from 10R

from 50R

Stability

0.01%

Temperature Coefficient :

max. ±5 ppm/K (-55...155)°C

typ. ±3 ppm/K (-55...125)°C

upon request ±1 ppm/K (0...60)°C

Voltage Proof

Max. Current

Thermal EMF

750 VDC

15 A

< 1 µV/K

ENVIRONMENTAL

Operating Temperature Range

-55°C...155°C

NiCr-Foil

MECHANICAL Resistor Material

Substrate

Al₂O₃

AlN

Housing

Connector Material

Max. torque backplate

Epoxy + heatsink aluminium

Cu, tinned, 4-pin

1.0 Nm

note¹⁾: Specially designed for applications with fast changing electrical load.

Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK

Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail sales@willow.co.uk web www.willow.co.uk

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