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Carbon-film Fixed Resistors with Power Rating of 1/8 to 2W

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Carbon-film Fixed Resistors with Power Rating of 1/8 to 2W

Product Details:
Place of Origin: CHINA
Brand Name: JK
Certification: ROHS
Model Number: CFR1/2W
Payment & Shipping Terms:
Minimum Order Quantity: 10000PCS
Price: Negotiable
Packaging Details: Bulk or tape
Delivery Time: 3-7 working days
Payment Terms: T/T & Paypal
Supply Ability: 200,000,000,000Pcs per month
Description

Quick Details

 

Carbon film resistors are a significant improvement on carbon composition. However, in comparison to metal film and metal oxide film, the commercially available range steadily decreases. Metal and oxide film are not more expensive to produce, and have overall better properties.

 

 

Description:

 

Carbon film resistors are a fixed form type resistor. They are constructed out of a ceramic carrier with a thin pure carbon film around it, that functions as resistive material.

 

Application

 

Typical use for carbon film resistors is in high voltage and temperature applications. Operating temperatures are up to 15kV with a nominal temperature of 350°C. Examples are high voltage power supplies, radar, x-rays and laser.

 

Specification

 

 Structure diagram

      

       The construction of resistor (CFR series) shall be as follows:

           Carbon-film Fixed Resistors with Power Rating of 1/8 to 2W

NO

Item

Material

  1

  Ceramic core

    High alumina ceramic is used.

  2

  Resistor element

  The resistor element shall consist of carbon film.

  3

  Terminal

  Tinned iron cap.

  4

  Connection

The lead wire, which is plated with solder, shall be mounted to the caps by welding process.

  5

  Lead wire

  Soldered or tinned annealed wire.

6

  Undercoat painting

   Electric insulation resin.

  7

  Finishing painting

   Epoxy resin is used.

  8

  Indication

   Color code.

 

1.Electrical Ratings

 

STYLE

MAX

WORKING

MAX

OVERLOAD

RESISTANCE

VALUE RANGE

CF1/6W / CF1/8W

200V

400V

0.1Ω〜22MΩ

CF1/4W / CF1/4WS

300V

600V

0.1Ω〜22MΩ

CF1/2W / CF1/2WS

350V

700V

0.1Ω〜22MΩ

CF1W / CF1WS

500V

1000V

0.1Ω〜22MΩ

CF2W / CF2WS

500V

1000V

0.1Ω〜22MΩ

CF3W / CF3WS

600V

1000V

0.1Ω〜22MΩ

CF5W / CF5WS

600V

1000V

0.1Ω〜22MΩ

 

2. Reliable test

 

ITEM (STANDARD)

PERFORMANCE AND/OR

QUALIITY ACCEPTANCE

TEST METHOD

Resistance value Vs

Temperature

Characteristics

For RX∠100KΩ

+350〜-500PPM/℃

100KΩ≦RX ≦1MΩ

0〜-700PPM/℃

1 MΩ ∠ RX

0〜-1500PPM/℃

JIS-C-5202 5.2

Measure resistance (Ro ohm) at room

Temperature(To ℃)

Measure again the same at 100℃

Higher than room temperature

6

R – RO          10

PPM =         *

RO         (T0+100) –T0

 

Short time overload

The resistance variation shall be

within±(0.75% + 0.05 ohm) and there

Shall be no mechanical breakage

JIS-C-5202 5.5

Apply DC voltage 2.5times the rated

Voltage for 5 seconds

The leave at room temperature for 30

Minutes then measure MAX overload

Voltage 0.50W – 700V (DC)

Insulation resistance

1000M ohm or more

JIS-C-5202 5.6 In V-BLOCK

Lay the resistor on 90° angle metal V

Block apply 100VDC between resistor

Lead and V block for one Minute And

Measure

Voltage endurance

The resistance variation shall be

within±(2% + 0.05ohm) and there

shall be no mechanical breakage

JIS-C-5202 5.7

Icy the resistor on the 90° angle metal V

Block and apply reamed AC voltage for

One Minute. Test voltage 0.25W –

500V (AC) 0.50W –700V(AC)

Intermittent overload

Resistance variation shall be

Within ±(2.00% + 0.05ohm)

JIS-C-5202 5.8

Apply AC voltage 4 times the rated

voltage for 1 second and rest for 25

seconds and Repeat this cycle for

10000±200times leave resistor 30

minutes at room temperature after test

and measure Maximum voltage for

intermittent Overload.0.50W-700V(AC)

Terminal strength

Resistance variation shall be within

±(0.5% + 0.05ohm) also there

Shall be on mechanical breakage

Pull test: apply 2.5kg force to the

lead in the direction of lead

axislor30±5 seconds.

Heat resistively

Against soldering

Resistance variation shall be within ±

(1.0%+0.05ohm) also there

Shall be on mechanical breakage

JIS-C-5202 7.10

Dip the lead in to a solder bath having a

Temperature of 350℃ ± 10℃ up to

4±0.8mm from the body of the resistor

at room temperature 3 hours after ,then

Measure

Solder ability

More than 95% of the surface of the

lead shall be covered by new solder

after the leads are dipped in the

Solder

JIS-C-5202 6.5

Dip the lead in to a solder bath having a

Temperature of 260℃± 5℃ up to

4±0.8mm from the body of the resistor and

hold it for 5 ± 0.5seconds then inspect

 

Humidity load test

Resistance variation be

Within ± (3.0% + 0.05ohm)

Also there shall be mo mechanical

breakage

JIS-C-5202 7.9

In temperature chamber having

temperature 40℃± 2℃,relative

humidity 90 – 95%, Apply rated

voltage 1.5hour and shut voltage 0.5

hour repeat this cycle for 1000 hours,

leave in room temperature for lhour

after test, then measure

Load life test

The variation of the resistance

Shall be within ± (3%+0.05ohm)

Also there shall be no mechanical

Breakage

JIS-C-5202 7.10

In the constant temperature chamber having

Temperature70℃ ± 2℃,apply rated

Dc voltage for 1.5hour and shut voltage for

0.5 hour and repeat thin cycle for 1000

hours, leave in room temperature lhour

after test, then measure

 

 

 

3.Color refer

 

Color

1 st Band

2 nd Band

3 rd Band

4 th Band

Black

0

0

0

10

 

Brown

1

1

1

10

 

Red

2

2

2

10

±2.0%

Orange

3

3

3

10

 

Yellow

4

4

4

10

 

Green

5

5

5

10

 

Blue

6

6

6

10

 

Violet

7

7

7

10

 

Grey

8

8

8

10

 

White

9

9

9

10

 

Gold

 

 

-1

10

±5.0%

Silver

 

 

-2

10

±10.0%

 

 

 

4. External dimensions

              P type

 

Carbon-film Fixed Resistors with Power Rating of 1/8 to 2W

Type

Dimensions

Normal Size

Small Size

I±2.0

L±1.0

ψD

ψd±0.05

H±2.0

CF1/8W

CF1/4WS

60

3.2

1.8±0.5

0.43

28

CF1/4W

CF1/2WS

60

6.5

2.3±0.5

0.45

28

CF1/2W

CF1WS

60

9.0

3.2±0.5

0.50

28

CF1W

CF2WS

60

11.5

4.5±1.0

0.68

25

73

11.5

4.5±1.0

0.68

31

CF2W

CF3WS

60

15.5

5.0±1.0

0.68

23

81

15.5

5.0±1.0

0.68

33

CF3W

CF5WS

94

17.5

6.0±1.0

0.68

38

CF5W

94

24.5

8.0±1.0

0.68

35

 

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