"SURE" BRAND WIRE WOUND RESISTOR - SAA

ALUMINUM HOUSED AXIAL LUG LEAD - Professional Grade

Aluminium Housed Axial Flat Lead Wire Wound Resistor, Brand Wire Wound Resistor, Wire Wound Resistor, Axial Lead Wire Wound Resistor, Radial Tag Wire Wound Resistors, Rheostat, Wire Wound Rheostat, Power Resistors, Thane, India

Features:

General Specifications:

Test

Conditions

Tolerances

1%, 2%, 5%.

Power Ratings

5 watts to 500watt

Resistance Series

E24 Series

Resistance Range

0.05 W - 100 KW

Resistant Element

Copper-nickel alloy, or nickel chrome alloy

Housing

Anodized Aluminum

Core Material

Ceramic steatite

Temperature Range

-55C to 250C

Insulation Resistance

Min. 10 G ohms

Dielectric Strength

AC; Max. leakage current : 2mA

1000VAC peak (10-15W);

2500VAC (25-50W);

5000VAC (100-500W)

Short Time Overload

2 X wattage rating - 5sec

Load Life

Wattage rating 1.5h. ON, 30min. OFF, 1000 hours

Thermal Shock

wattage rating 30min., -55 C, 15-30minutes

 

Mechanical Data:

POWER (Watt)

A

B

C

D

E

F

G

H

L

10

14.3

15.9

19

35

11

21

10

2

2.4

25

18.3

19.8

27

50

14

27.5

14

2.25

3.18

50

39.8

21.4

50

72

16

29

15.5

2.25

3.18

75

29

37

49

71

27

48

26

3.5

4.4

100

35

37

65.5

83

27

48

26

3.5

4.4

150

70

57

89

139

46

72

45

5

5

250

98.5

63.5

115

178

54

76

56

6.5

5

500

180

63.5

200

263

54

76

56

6.5

5

                        Dimensions unless specified in mm

 Standard terminations:

 

Construction

SAA: These resistors consist of a resistance element wounded on the special grade ceramic rod and embedded into an aluminum case. The wire used is of low temperature co-efficient. The wire ends are spot welded to the end caps. This gives reliable contacts over long period of use. The aluminum casing made from high quality heat sink grade helps to dissipate the heat from the resistor at the faster rate and has a low change of resistance with respect to temperature, with resistance varying in direct proportion. This type of wire wound resistor is manufactured such that the aluminum enclosure is filled with special non-flammable silicon base cement paste.

 

Electrical Characteristics

DERATING

The power that the resistor can dissipate depends on the operating temperature

 

Test and Requirements

TEST ITEM

CHARACTERISTICS

Resistance tolerance

Tolerance resistance 10%(K)

Temperature coefficient

200PPM/C MAX

Power rating load

D R/R ≤ (0.5% + 0.1W)

Surface temperature up 350CMAX

Short-term overload

Free of appearance or structural irregularity

D R/R ≤ (2% + 0.1W)

Insulation resistance

100MW min

Dielectric withstanding voltage

Free of appearance or structural irregularity 

D R/R ≤ (0.1% + 0.05W)

Terminal strength

Free of appearance or structural irregularity

Resistor strength

Free of appearance or structural irregularity

Vibration

Free of appearance or structural irregularity

Δ R/R ≤ (1% + 0.05Ω)

Thermal shock

Resistor free of structural irregularity

Crack of silicon cement surface

Δ R/R ≤ (2% + 0.1Ω)

Humidity

Free of appearance or structural irregularity

Δ R/R ≤ (3% + 0.1Ω)

Load life

Free of appearance or structural irregularity

Discoloration of marking

Δ R/R ≤ (3% + 0.1Ω)

Flame retardation

US UL-94 flame retardation test V-0 grade

noncombustible

 

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