Metal Film Resistors

MFR4P Series

MFR4P

Power rating at 70°C

watts

0.6

Resistance range

ohms

0R22 to 1M

Limiting element voltage

volts

250

TCR

ppm/°C

<1R: 300 >=1R: 50

Resistance tolerance

%

0.5, 1, 2, 5*

Standard values

E24 preferred

Thermal impedance

°C/watt

130

Ambient temperature range

°C

-55 to 155

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Issue D · 03.06

A subsidiary of

TT electronics plc

Welwyn Components

138

Construction

The resistance element is a precisely controlled thin film of

metal alloy sputtered on to a high purity ceramic core,

protected by a moisture-resistant, high dielectric strength

coating applied so that terminations remain completely clear.

This permits a well defined body length,

(clean lead to clean lead dimension L).

Terminations

Material

Solder-coated copper wire.

Strength

The terminations meet the requirements of

IEC 68.2.21

Solderability

The terminations meet the requirements of

IEC 115-1, Clause 4.17.3.2

Marking

Resistors are colour coded with 6 bands. IEC 62 colours are

used.

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Dimensions (mm) & Weight (g)

PCB

Min.

mounting

bend

Type

L Max

D Max

f min

d nom

centres

radius

Wt.nom

MFR4P

6.2

2.5

21.0

0.6

10.2

0.6

0.3

Physical Data

L

D

f

d

*Below 1 ohm 5% preferred