MELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor
  • Air ProMELF Fusible Wirewound Film Fixed Resistor

MELF Fusible Wirewound Film Fixed Resistor

MELF Fusible Wirewound Film Fixed Resistor applies to electric light sources, switching power supplies, chargers, communication equipment, medical electronic equipment, test and measurement equipment, automobiles. Replacing plug-in resistors in electronic equipment such as electronics, industrial products, and household appliances.

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Product Description

MELF Fusible Wirewound Film Fixed Resistor



Scope Of MELF Fusible Wirewound Film Fixed Resistor


This standard applies to electric light sources, switching power supplies, chargers, communication equipment, medical electronic equipment, test and measurement equipment, automobiles.

Replacing plug-in resistors in electronic equipment such as electronics, industrial products, and household appliances.

MELF Fusible Wirewound Film Fixed Resistor factoryMELF Fusible Wirewound Film Fixed Resistor factoryMELF Fusible Wirewound Film Fixed Resistor factory

Features Of MELF Fusible Wirewound Film Fixed Resistor


1) Use non-combustible / epoxy resin coatings with safety features of non-combustible and insulating;

2) Miniaturization for high-density placement;

3) Meet the requirements of lead-free (Pb) and lead-containing soldering processes;

4) Can be used in automatic surface mount (SMD) assembly systems. Suitable for automatic welding by wave soldering and reflow soldering


Power Derating curve Of MELF Fusible Wirewound Film Fixed Resistor

MELF Fusible Wirewound Film Fixed Resistor factory

Structure dimension Of MELF Fusible Wirewound Film Fixed Resistor


MELF Fusible Wirewound Film Fixed Resistor factory

Size

Dimension(mm)

L

D1

D2 Max.

0204

3.5±0.2

1.1±0.1

1.4±0.2

0207

5.9±0.2

1.7±0.1

2.1±0.2

0309

Single cap 8.5±0.2

Double cap 8.7±0.2

2.5±0.1

Single cap 3.1±0.2

Double cap 3.0±0.2


Material list Of MELF Fusible Wirewound Film Fixed Resistor


Code

Name

Material

1

Coating

Non-combustible / epoxy resin coating

2

Color ring

Flame retardant coating

3

Cuting wire

--

4

Fuse element

Alloy wire

5

Magnetic bar

Alumina ceramic body / resistive film

6

Cap

Tinned iron cap


Part Numbering Of MELF Fusible Wirewound Film Fixed Resistor


KNPM

1

100

J

S

0309


KNPM : Series name

1 : Power Rating -- 0.125W,0.25W,0.5W,1W,2W.

100 : Resistance value -- E24 norminal resistance

J : Resistance tolerance -- F=±1%,G=±2%,J=±5%

S : Size code -- It is normal size without code; S- small size ; X-Ultra-small size.


Electrical Performances Of MELF Fusible Wirewound Film Fixed Resistor


Size     Type

Power range(70C)

Temperature range℃

Insulation voltage V

Resistance range(Ω)

±1%、±2%、±5%

0204

0.125W

0.25WS

0.5W-X

-55~155

200

MFM 0.1~2.2M

CFM 1~10M

MOFM 1~10K

0207

0.25W

0.5W-S

1W-X

-55~155

250

KNPM 0.22~100

MFM 0.1~10M

CFM 1~10M

MOFM 1~10K

0309

0. 5W

1W-S

2W-X

-55~155

350

KNPM 0.22~300

MFM 0.1~10M

CFM 1~10M

MOFM 1~10K


General Data Of MELF Fusible Wirewound Film Fixed Resistor


Nominal resistance tolerance

± 5%

Climate category

55/155/21

Low air pressure

8.5kpa

Stability level

5%

Resistance change

Limit value

Long-term test

±(5%R+0.1Ω)

Short-term test

± (1% R + 0.05 Ω)

Rated current

I2(A)=P(W)/R(Ω)


Package quantity & size Of MELF Fusible Wirewound Film Fixed Resistor


 9.1 Tape Size



Size

φA

(mm)

φB

(mm)

φC

(mm)

W

T

QTY(pcs)

0204

179±2

60±2

13±0.5

9±1

12±0.5

3000

0207

179/330±2

90±2

13±0.5

10±1

14.5±1

2000/5000

0309

330±2

90±2

13±0.5

16±1

19.5±1

2500


9.2 Paper size Of MELF Fusible Wirewound Film Fixed Resistor


Size

Dimension(mm)

A

B

W

E

F

0204

1.6±0.2

3.8±0.2

8.0±0.2

1.75±0.1

5.25±0.1

0207

2.4±0.2

6.0±0.2

12.0±0.2

1.75±0.1

7.25±0.1

0309

3.6±0.2

8.9±0.2

16.0±0.2

1.75±0.1

9.25±0.1


P0

P1

P2

D0

T

0204

4.0±0.1

4.0±0.1

2.0±0.1

1.5±0.1

1.65±0.1

0207

4.0±0.1

4.0±0.1

2.0±0.1

1.5±0.1

2.5±0.1

0309

4.0±0.1

8.0±0.1

2.0±0.1

1.5±0.1

3.5±0.1


Color marking Of MELF Fusible Wirewound Film Fixed Resistor


MELF Fusible Wirewound Film Fixed Resistor factory

                 

Color

First digit

Second digit

Third digit

Malutiplier

Tolerance

Black

0

0

0

100

-

Brown

1

1

1

101

±1

Red

2

2

2

102

±2

Orange

3

3

3

103

-

Yellow

4

4

4

104

-

Green

5

5

5

105

±0.5

Blue

6

6

6

106

±0.25

Violet

7

7

7

107

±0.1

Gray

8

8

8

108

-

White

9

9

9

109

-

Gold

-

-

-

10-1

±5

Sliver

-

-

-

10-2

±10

Plain

-

-

-

-

-


Performance Specifications Of MELF Fusible Wirewound Film Fixed Resistor


Characteristics

Test Conditions

Limits

Short Time Over Load

IEC 60115-1 4.13 5 seconds 2.5x rated voltage (not over max. overload voltage)

±2%

Load Life In Humidity

IEC 60115-1 4.24 56 days rated load (not over max. working voltage) at (40±2)°C and (93±3)% relative humidity


Load Life 1,000 hours

IEC 60115-1 4.25.1 Rated load (not over max. working voltage) with 1.5 hours ON, 0.5 hours OFF, at (70±2)°C

±5%

Resistance To Soldering Heat

IEC 60115-1 4.18.2 Dip the resistor into a solder bath measured (260±5)°C and hold it for a 10±1 seconds

±1%

Solderability

IEC 60115-1 4.17.2 Solder area covered after (230±3)°C/(2±0.2) seconds with flux applied

95% Min.

Vibration

IEC 60115 4.22 Six hours in each parallel and axial direction with a simple harmonic motion having an amplitude of 0.75mm and 10 to 500 Hz.

±1%

Thermal Endurance

IEC 60115-1 4.25.3 1000 hours at 200°C without load

±1%

Thermal Shock

IEC 60115-1 4.19 -55°C 30minutes, +155°C 30minutes, 5 cycles

±3%

Surge Test

Surge voltage = DC P is power rating, R is resistance value, surge voltage is not more than listed at right. Surge spec = 1.2/50µs Period = 60 sec Number of surges = 100

±5%

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