Datasheet > MAR40

MAR40

更新时间： 2024-09-23 03:50:23

品牌	Logo	应用领域
TTELEC		/
页数	文件大小	规格书
2页	124K
描述
Ultra Precision Metal Film Resistors

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数据手册

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MAR40 数据手册

Ultra Precision

Metal Film Resistors

Welwyn Components

MAR 40/42 series

• Tolerance down to 0.005%

Very low TCRs

•

Rugged moulded protection

•

Matched sets available

•

Electrical Data

Notes

Power rating at 85°C

Resistance range

watts

ohms

volts

0.3

20R0 to 400K

Higher values by agreement

Limiting element voltage

TCR (0°C to +60°C)

TCR (-55°C to +125°C)

Resistance tolerance

Standard values

250

2 (T18) & 5 (T16)

ppm/°C

5 (T18) & 10 (T16)

0.005, 0.01, 0.02, 0.05, 0.1, 0.25, 0.5 & 1

E24, E96 preferred

Any value to order

Thermal impedance

Ambient temperature range

°C/watt

°C

- 55 to +155

Physical Data

Dimensions (mm) and Weight (g)

Wt.

Type

L max.

7.75

H max. W max.

T min.

d nom.

0.6

S nom.

3.8

nom.

0.65

MAR 40

MAR 42

8.64

3.3

25.4

8.25

0.6

5.1

Marking

Construction

Type reference, TCR code, resistance value and tolerance. The

Ceramic rods are coated with a metal film and plated steel

resistance value marking conforms to IEC 62.

caps are force fitted. A helical cut is used to adjust the film to

its final value. Termination wires are welded to the caps and

the resistor is protected with a multiple lacquer coat and

encapsulated in an epoxy moulded protection.

Solvent Resistance

The body protection and marking are resistant to all normal

industrial cleaning fluids suitable for printed circuits.

Terminations

Material

Solder-coated copper wire.

Strength

The terminations meet requirements of

IEC 68.2.21 and MIL-STD 1276.

Solderability

The terminations meet the requirements of

IEC 115-1, Clause 4.17.3.2 and MIL-STD 202.

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 B · 03.02

180

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