MFP1 [TTELEC]

Flameproof Power Metal Film Resistors; 矿用隔爆型功率金属膜电阻器


型号：	MFP1
厂家：	TT Electronics
描述：	Flameproof Power Metal Film Resistors 矿用隔爆型功率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：395K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Flameproof Power

Metal Film Resistors

Welwyn Components

MFP Series

Smallest size for power rating

•

Resistance range 0.1 ohms to 1M ohms

•

Flameproof protection

•

Electrical Data

MFP1

<1 Ω: 0.7 >=1 Ω: 1.0

MFP2

Power rating at 70°C

Resistance range

watts

ohms

volts

0R1 – 1M

1R0 – 1M

Limiting element voltage

TCR

350

ppm/°C

< 1 Ω: 300 1 Ω - 9.1 Ω: 200 ≥10 Ω: 50

100

Resistance tolerance

Standard values

1, 2, 5

E24 preferred

-55 to 155

Thermal impedance

Ambient temperature range

°C/watt

°C

120

Physical Data

Dimensions (mm) & Weight (g)

PCB

Min.

mounting

centres

bend

Type

L Max

6.2

D Max

2.5

f min

21.0

27.0

d nom

0.6

radius Wt.nom

MFP1

MFP2

10.2

18.4

0.6

1.2

0.3

10.0

4.0

0.8

0.55

Construction

Marking

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).

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.

Terminations

Material

Solder-coated copper wire.

Flammability

The resistor coating will not burn or emit incandescent

particles under any condition of applied temperature or

power overload.

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

143

Flameproof Power

Metal Film Resistors

MFP Series

Welwyn Components

Performance Data

Maximum

Load at rated power : 1000 hours at 70°C

Shelf life : 12 months at room temperature

Derating from rated power at 70°C

Climatic

∆R %

zero at 155°C

Climatic category

50/155/56

0.5

Temperature rapid change

Resistance to solder heat

Voltage proof

∆R %

volts

0.5

500 min

Packaging

Application Notes

1. If the resistors are to dissipate full rated power, it is

recommended that the terminations should not be

soldered closer than 4mm from the body.

MFP resistors are normally supplied tape packed ready for

loading onto automatic sequencing and insertion machines.

The standard taping method and critical dimensions are

shown in Figure 1.

2. Due to operating temperature limitations imposed by some

pcb materials, derating may be necessary. An estimate of

the temperature rise to be expected can be calculated

using the thermal impedance figures given under Electrical

Data.

Component wires will not protrude beyond the outside edge

of the tapes.

Alternative packaging available by request.

3. MFP resistors an also be supplied pre-formed.

Lead Formed resistors can also be supplied. Standard options

of Lancet, Radial and Goalpost forming are shown in lead

Form Information section.

Figure 1

f₁

f₂

Body location f₁– f₂≤ 1.4 mm

Standard Quantities Per Package

Type

MFP1

MFP2

Ammo pack

5000

2000

Type

MFP1

MFP2

b (mm)

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

Issue D · 03.06

144

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