Riedon Inc.

300 Cypress Avenue

Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

06/13

FHR 2-3025 3818

FHR 4-3825 3825H 4618

Precision Shunt Resistors

Type

FHR 2-3025

FHR 2-3818

FHR 4-3825

FHR 4-3825H

FHR 4-4618

Resistance Range

0.010 to 100Ohms

0.001 to 100Ohms

Power rating

free air 70°C

for 3825H

with heatsink

3 W

40 W

3 W

5 W

50 W

Thermal Resistance Rthj-c

2.0 K/W

1.6 K/W

Tolerances

from 0R001

from 0R005

from 0R01

from 0R02

0.5% / 1% / 2% / 5%

0.25% / 0.5% / 1% / 2% / 5%

1% / 2% / 5%

0.5% / 1% / 2% / 5%

0.1% / 0.25% / 0.5% / 1% / 2% / 5%

0.1% / 0.25% / 0.5% / 1% / 2% / 5%

Stability

0.1% / 0.2% / 0.5%

(depends on stress)

Temperature Coefficient

Standard

Option 1

±15ppm/K (20 to 60°C)

R ≤ 0R2 TCR see table A next page

±15ppm/K (20 to 60°C)

±25ppm/K (20 to 60°C) for contact F

±10ppm/K (20 to 60°C)

(only contact A and K)

Max. Current

150 A / 200 A for contact F

Voltage Proof

500 VDC

Thermal EMF

< 0.1µV/K

Operating Temperature Range

-40 to 130°C

Resistor Material

CuNiMn-Foil

Substrate

anodized aluminium

Housing

Epoxy

Connector Material

Cu tinned

Terminals

2

4

Max. torque

1 Nm

SPECIFICATIONS

Part Description: Part Type - Resistance - Contact - Tolerance

FHR 4-4618 0.050 Ohms A 1%

Ordering Information

• Resistances from 0.001Ohm to 100Ohms

• Power Rating to 50Watt

• Resistance Tolerances to ±0.1%

• TCR to ±10ppm/°C

• Very Low Inductance

• Isolated Back Plate