MFR4P [TTELEC]

Metal Film Resistors; 金属膜电阻器


型号：	MFR4P
厂家：	TT Electronics
描述：	Metal Film Resistors 金属膜电阻器电阻器膜电阻器金属膜电阻器
文件：	总2页 (文件大小：385K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Metal Film Resistors

Welwyn Components

MFR4P Series

• Smallest size for power rating

Resistance range: 1 ohm to 1M ohms

•

Temperature coefficient down to 50ppm/°C

•

Electrical Data

MFR4P

0.6

Power rating at 70°C

Resistance range

watts

ohms

volts

0R22 to 1M

250

Limiting element voltage

TCR

ppm/°C

<1R: 300 >=1R: 50

0.5, 1, 2, 5*

E24 preferred

130

Resistance tolerance

Standard values

Thermal impedance

Ambient temperature range

°C/watt

°C

-55 to 155

*Below 1 ohm 5% preferred

Physical Data

Dimensions (mm) & Weight (g)

PCB

Min.

mounting

centres

bend

Type

L Max

6.2

D Max

2.5

f min

21.0

d nom

0.6

radius Wt.nom

MFR4P

10.2

0.6

0.3

Construction

Marking

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

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

used.

coating applied so that terminations remain completely clear.

Solvent Resistance

The body protection and marking are resistant to all normal

This permits a well defined body length,

(clean lead to clean lead dimension L).

industrial cleaning solvents suitable for printed circuits.

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

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.

A subsidiary of

TT electronics plc

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

Issue D · 03.06

138

Metal Film Resistors

MFR4P Series

Welwyn Components

Performance Data

Maximum

Load at rated power : 1000 hours at 70°C

Shelf life : 12 months at room temperature

Derating

∆R %

0.5

0.1

Zero at 155°C

Short term overload

∆R %

0.5

Climatic

Climatic category

55/125/56

Long term damp heat

Temperature rapid change

Resistance to solder heat

Vibration and bump

∆R %

µV/V

0.5

Noise. (in a decade of frequency)

Insulation resistance

0.1

ohms

volts

>1G

500 min

Voltage proof

Packaging

Standard Quantities Per Package

MFR4P resistors are supplied tape packed ready for loading

onto automatic sequencing and insertion machines.

Type

MFR4P

5000

Large ammo pack

The standard taping method and critical dimensions are

shown in Figure 1.

Component wires will not protrude beyond the outside edge

of the tapes.

Alternative packaging available by request.

Figure 1

f₁

f₂

Body location f₁– f₂≤ 1.4 mm

Lead Formed resistors can also be supplied. Standard options

of Lancet, Radial and Goalpost forming are available by

request.

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

Issue D · 03.06

139

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