Flameproof Power

Metal Film Resistors

MFP Series

MFP1

MFP2

Power rating at 70°C

watts

<1

Ω: 0.7

>=1

Ω: 1.0

2

Resistance range

ohms

0R1 – 1M

1R0 – 1M

Limiting element voltage

volts

350

TCR

ppm/°C

< 1

Ω: 300 1 Ω - 9.1 Ω: 200 ≥10 Ω: 50

100

Resistance tolerance

%

1, 2, 5

Standard values

E24 preferred

Thermal impedance

°C/watt

120

82

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

143

Marking

Resistors are colour coded with 4 or 5 bands depending on

value and tolerance. IEC 62 colours are used.

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Flammability

The resistor coating will not burn or emit incandescent

particles under any condition of applied temperature or

power overload.

Construction

The resistance element is a precisely controlled thin film of

metal alloy on a high purity ceramic core, protected by a

cement 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

Dimensions (mm) & Weight (g)

PCB

Min.

mounting

bend

Type

L Max

D Max

f min

d nom

centres

radius

Wt.nom

MFP1

6.2

2.5

21.0

0.6

10.2

0.6

0.3

MFP2

10.0

4.0

27.0

0.8

18.4

1.2

0.55

Physical Data

L

D

f

d