FPV Series – Riedon™ Ultra Precision Power Resistors by Bourns

Features

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Formerly a Riedon™ product

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Resistances from 0.05 Ω to 650 Ω

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Power rating to 50 watts

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Resistance tolerances to ±0.01 %

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TCR to ±1 PPM/°C

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Load stability to 0.01 %

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Isolated backplate

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RoHS compliant*

Applications

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Current sense

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Battery management systems

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Power supplies

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Motor drives

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Specifications

Characteristic

FPV325-18 FPV420-30 FPV325-20 FPV420-50

Resistance Range (Ω)1

0.05 - 650

0.05 - 100

0.05 - 650

0.05 - 100

Power Rating (W)2

Free Air @ 70 °C

With Heat SInk

3

18

2.5

30

3

20

2.5

50

Thermal Resistance Rthj-c (K/W)

3.5

3.6

2.1

2.2

Tolerances

0.05Ω ≤ R <10 Ω

10.0 Ω ≤ R < 50.0 Ω

50.0 Ω ≤ R

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 %

Stability

0.01 %

Shelf Life Stability

25 PPM / ΔR after 1 year

50 PPM / ΔR after 3 years

Temperature Coefficient

325: (+25 °C to +60 °C)

420: (-55 °C to +125 °C)

±5 PPM/°C

±3 PPM/°C (Standard)

±1 PPM/°C (only from +25 °C to +60 °C)

Voltage Proof

750 VDC

Max. Current

15 A

Thermal EMF

<0.1 µV/K

Terminals

4

Notes:

1

Other resistance values available upon request.

2

Power rating dependent upon resistance value.

General Specifications

Operating Temperature Range

................................ -55 °C to +155 °C

Resistor Material........................NiCr-Foil

Substrate

18 W / 30 W ................................Al2O3

20 W / 50 W ...................................AlN

Housing ..................Epoxy + Al-heat sink

Connector Material .................. Cu tinned

Terminals ...............................................4

Max. Torque................................. 1.0 Nm

75

50

25

0

25

50

75

1000

125

150

Temperature (°C)

200

100

0

-100

-200

-300

-400

-500

-600

-700

NOMINAL

Δ R/R

NOMINAL SPREAD ±2.3 PPM/°C

NOMINAL SPREAD ±2.3 PPM/°C

Temperature Coefficient

How to Order

FPV 325 - 20 - R050 B S

Model

FPV

Size

325 = 3425

420 = 4020

Power Rating

18 = 18 W

20 = 20 W

30 = 30 W

50 = 50 W

Resistance

“R” represents decimal point

(example: R050 = 0.05 Ω,

650R = 650 Ω)

Tolerance

L = ±0.01 %

C = ±0.25 %

P = ±0.02 %

D = ±0.5 %

W = ±0.05 %

F = ±1.0 %

B = ±0.1 %

TCR (PPM/°C)

K = ±1

S = ±3 (Standard)

M = ±5

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

“Bourns” is a registered trademark of Bourns, Inc. in the United States and other countries. In April 2023, BE Services Company, Inc., a subsidiary of Bourns, Inc., purchased certain

assets of Riedon, Inc., including its logo and trademarks and the right to continue to manufacture former Riedon™ products. “Riedon Logo” is a registered trademark of BE Services

Company, Inc., in the United States. “Riedon” is a trademark of BE Services Company, Inc.

CALIFORNIA WARNING: Can expose you to lead, a carcinogen and reproductive toxicant.

See www.P65Warnings.ca.gov