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Through-hole resisTors

Metal Film Resistors

General Type

Normal & Miniature Style [ MFR Series ]

FeATures

Power Rating

Resistance Tolerance

T.C.R.

1/6W, 1/4W, 1/2W, 1W, 2W, 3W

±0.5%, ±1%, ±5%

±15ppm/°C, ±25ppm/°C, ±50ppm/°C, ±100ppm/°C

DerATiNg CurVe

iNTroDuCTioN

The MFR Series Metal Film Resistors are

manufactured using a vacuum sputtering system

to deposit multiple layers of mixed metal

alloys and passivative materials onto a carefully

treated high grade ceramic substrate. After a

helical groove has been cut in the resistive layer,

tinned connecting leads of electrolytic copper

are welded to the end-caps. The resistors are

coated with layers of blue color lacquer.

For resistors operated in ambient temperatures above 70°C, power rating must be derated

in accordance with the curve below.

Rated Load (%)

100

100 120 140 160

155 °C

Ambient Temperature (°C)

DiMeNsioNs

sTYle

Normal

MFR-12

ød

øD

MFR-25

MFR-50

MFR100

MFR200

Miniature

MFR25S

MFR50S

MFR1WS

MFR2WS

MFR3WS

DiMeNsioN

3.4±0.3

6.3±0.5

9.0±0.5

11.5±1.0

15.5±1.0

øD

1.9±0.2

2.4±0.2

3.3±0.3

4.5±0.5

5.0±0.5

28±2.0

26±2.0

35±2.0

33±2.0

Unit: mm

ød

0.45±0.05

0.55±0.05

0.8±0.05

Note:

eleCTriCAl ChArACTerisTiCs

sTYle

Power Rating at 70°C

Maximum Working Voltage

Maximum Overload Voltage

Voltage Proof on Insulation

Resistance Range

Operating Temp. Range

Temperature Coefficient

MFr-12

1/6W

200V

400V

300V

400V

MFr25s

1/4W

250V

500V

MFr-25

MFr50s

1/2W

300V

600V

350V

700V

MFr-50

MFr1Ws MFr100

400V

800V

700V

500V

1,000V

MFr2Ws MFr200

MFr3Ws

1Ω - 10MΩ & 0Ω for E24 & E96 series value

-55°C to +155°C

±15ppm/°C, ±25ppm/°C, ±50ppm/°C, ±100ppm/°C

Note: Special value is available on request

eNViroNMeNTAl ChArACTerisTiCs

PerForMANCe TesT

Short Time Overload

Voltage Proof on Insulation

Temperature Coefficient

Insulation Resistance

Solderability

Solvent Resistance of Marking

Robustness of Terminations

Periodic-pulse Overload

Damp Heat Steady State

Endurance at 70°C

Temperature Cycling

Resistance to Soldering Heat

TesT MeThoD

IEC 60115-1 4.13

IEC 60115-1 4.7

IEC 60115-1 4.8

IEC 60115-1 4.6

IEC 60115-1 4.17

IEC 60115-1 4.30

IEC 60115-1 4.16

IEC 60115-1 4.39

IEC 60115-1 4.24

IEC 60115-1 4.25

IEC 60115-1 4.19

IEC 60115-1 4.18

2.5 times RCWV for 5 Sec.

in V-block for 60 Sec., test voltage by type

-55°C to +155°C

in V-block for 60 Sec.

235±5°C for 3±0.5 Sec.

IPA for 5±0.5 Min. with ultrasonic

Direct load for 10 Sec. in the direction of the terminal leads

4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)

40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV

70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)

-55°C



Room Temp.



+155°C



Room Temp. (5 cycles)

260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body

APPrAise

±0.25%+0.05Ω

By type

>10,000MΩ

95% Min. coverage

No deterioration of

coatings and markings

≥2.5kg (24.5N)

±1.0%+0.05Ω

±1.5%+0.05Ω

±0.75%+0.05Ω

±0.25%+0.05Ω

Revision: 201304

Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.

exPlANATioNs oF orDeriNg CoDe

MFr

Code 1 - 3

series Name

See Index

-12

Code 4 - 6

Power rating

-05 = ød0.5mm

-06 = ød0.6mm

-07 = ød0.7mm

-08 = ød0.8mm

-10 = ød1.0mm

-14 = ød1.4mm

-12 = 1/6W

-25 = 1/4W

25S = 1/4WS

-50 = 1/2W

50S = 1/2WS

100 = 1W

1WS = 1WS

200 = 2W

2WS = 2WS

204 = 0.4W

207 = 0.6W

300 = 3W

3WS = 3WS

3WM = 3WM

400 = 4W

500 = 5W

5WS = 5WS

5SS = 5WSS

700 = 7W

7WS = 7WS

10A = 10W

20A = 20W

30A = 30W

40A = 40W

50A = 50W

10S = 10WS

15A = 15W

25A = 25W

10B = 100W

25B = 250W

Code 7

Tolerance

P = ±0.02 %

A = ±0.05 %

B = ±0.1 %

C = ±0.25%

D = ±0.5 %

F = ±1 %

G = ±2 %

J = ±5 %

K = ±10 %

- = Base on Spec.

Code 8

Packing style

T = Tape/Box

R = Tape/Reel

B = Bulk

Code 9

Temperature Coef-

ficient of Resistance

- = Base on Spec.

A = ±5 ppm/°C

B = ±10 ppm/°C

C = ±15 ppm/°C

S = ± 20ppm/°C

D = ±25 ppm/°C

E = ±50 ppm/°C

F = ±100 ppm/°C

G = ±200 ppm/°C

H = ±250 ppm/°C

I = ±300 ppm/°C

J = ±350 ppm/°C

52-

Code 10 - 12

Forming Type

26- = 26mm

52- = 52.4mm

73- = 73mm

81- = 81mm

91- = 91mm

F = F Type

FK = FK Type

FKK = FKK Type

FFK = F-form Kink

M = M-Type Forming

MB = M-form W/flat

MT = MT Type Forming

MR = MR Type

AV = AVIsert

PN = PANAsert

100r

Code 13 - 17

resistance Value

0R1 = 0.1

100R = 100

10K = 10,000

10M = 10,000,000

exCePTioN:

• Cement series:

• JPW series:

<Code 8>: Special packing style code

B: Bulk with wirewound or metal oxide sub-assembly for resistance value

W: Bulk with ceramic based wirewound sub-assembly for resistance value

M: Bulk with metal oxide sub-assembly for resistance value

F: Bulk with Fiberglass based wirewound sub-assembly for resistance value

<Code 10-12>: Without forming code

Example:

<Code 13-17>: without resistance value code

Example:

JPW-06-T-52-

SQP500JB-10R

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