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WF25P22R0FTL

更新时间：2025-07-10 09:13:26

品牌：WALSIN

描述：2512(6432), 22.0Ω, ±1%, 2W

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WF25P22R0FTL 概述

2512(6432), 22.0Ω, ±1%, 2W

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Approval sheet

WF25P, WF20P, WF10P, WF12P, WF08P,

WF06P, WF04P

5%, 1%, 0.5%, 0.1% 1Ω ~ 10MΩ

Thick Film High Power Chip Resistors

Size 2512 2W, 2010 1W, 1210 1/2W,

1206 1/2W, 0805 1/4W, 0603 1/8W, 0402 1/8W

*Contents in this sheet are subject to change without prior notice.

Page 1 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

FEATURE

1. High power rating and compact size

2. High reliability and stability

3. Reduced size of final equipment

4. RoHS compliant and Lead free products

5. Flame Retardant

APPLICATION



Power supply

PDA

Digital meter

Computer

Automotives

Battery charger

DC-DC power converter

DESCRIPTION

The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are

added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The

composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to

nominated value within tolerance which controlled by laser trimming of this resistive layer.

The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For

ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.

Fig 1. Construction of Chip-R

Page 2 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

QUICK REFERENCE DATA

Item

General Specification

Series No.

Size code

WF25P

WF20P

WF10P

WF12P

WF08P

WF06P

WF04P

2512

2010

1210

1206

0805

0603

0402

(6432)

(5025)

(3225)

(2012)

(1608)

(1005)

(3216)

Resistance

Tolerance

1%, 0.5%, 0.1% ( E24+E96),

5% (E24)

Resistance

Range

0Ω,1 ~ 1M

0Ω,1 ~ 10M

0Ω,1 ~ 1M

TCR (ppm/C)

10 ~ 1M

< 10

±100

±200

±100

±150

±100

±150

±100

-200/+400

Max.

dissipation at

T_amb=70C

2 W

1 W

200V

400V

1/2 W

200V

400V

1/2W

1/4 W

150V

300V

1/8 W

50V

Max.

Operation

Voltage

300V

500V

200V

50V

Max. Overload

Voltage

400V

100V

Operation

- 55/+155’C

Temperature

Note :

This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication

60115-8”

Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by

RCWV  RatedPowerResistance Value or Max. RCWV listed above, whichever is lower.

2W loading with total solder-pad and trace size of 300 mm²

TEST CONDITION FOR JUMPER (0 )

Item

WF25P

WF20P

WF10P

1/2W

WF12P

1/2W

WF08P

1/4W

WF06P

1/8W

WF04P

1/8W

Power Rating

Resistance

Max. 20m

Max. 20m Max. 20m Max. 20m

Max. 20m

10A

Max. 20m

Max. 50m

1.5A

Rated Current

Peak Current

25A

17.5A

12.5A

10A

3.8A

Operating

Temperature

-55 ~ +155C

Page 3 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

MECHANICAL DATA

Unit: mm

Symbol

WF25P

WF20P

WF12P

WF10P

WF08P

WF06P

WF04P

6.30  0.20

3.10  0.20

0.60  0.15

0.60  0.25

1.80  0.25

5.00  0.20

2.50  0.20

0.60  0.10

0.60  0.25

3.10  0.15

1.60  0.15

0.55  0.10

0.50  0.25

3.10  0.15

2.50  0.15

0.55  0.10

0.50  0.25

2.00  0.10

1.25  0.10

0.50  0.15

0.40  0.20

1.60  0.10

0.80  0.10

0.45  0.15

0.30  0.10

0.30  0.15

1.00  0.05

0.50  0.05

0.35  0.05

0.20  0.10

0.25  0.10

Page 4 of 9

ASC_WFxxP_V03

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Approval sheet

Recommended Solder Pad Dimensions

Type

WF25P

3.7mm

2.45mm

7.6mm

MARKING

For 0603 above size, each resistor is marked with a four-digit for 1% tolerance and three-digit for 5%

tolerance on the protective coating to designate the nominal resistance value.

For 0603, each resistor is marked with a three-digit!

For 0402, no marking !

For Jumper, 2512/2010 defines 0000, 1206/0805/0603 defines 000.

Example:

102 = 1k

16R0 = 16

102

16R0

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of

5% & 1%. The values of the E24/E96 series are in accordance with “IEC publication 60063”.

Derating curve

The power that the resistor can dissipate depends on the operating temperature; see Fig.2

Figure 2

Maximum dissipation in percentage of rated power as a

function of the ambient temperature

Page 5 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

MOUNTING

Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by

automatic placement systems.

Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).

Electrical connection to the circuit is by individual soldering condition.

The end terminations guarantee a reliable contact.

SOLDERING CONDITION

The robust construction of chip resistors allows

them to be completely immersed in a solder bath

of 260C for 10 seconds. Therefore, it is possible

to mount Surface Mount Resistors on one side of

a PCB and other discrete components on the

reverse (mixed PCBs).

Surface Mount Resistors are tested for

solderability at 235C during 2 seconds. The test

condition for no leaching is 260C for 30 seconds.

Typical examples of soldering processes that

provide reliable joints without any damage are

given in Fig 3.

Fig 3. Infrared soldering profile for Chip Resistors

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

WF25

Size code

102

Type code

Resistance code

Tolerance

J : 5%

Packaging

code

Termination

code

WF25 : 2512

WF20 : 2010

WF12 : 1206

WF10 : 1210

WF08 : 0805

WF06 : 0603

WF04 : 0402

P :Power

5% E24: 2 significant digits

followed by No. of zeros

e.g.:

T : 7” Reel

= Sn base

(lead free)

2512 size = 2W

2010 size = 1W

1206 size = 1/2W

1210 size = 1/2W

0805 size = 1/4W

0603 szie = 1/8W

0402 size = 1/8W

F : 1%

taping

D : 0.5%

B : 0.1%

P : Jumper

3ohm

=3R0

=100

=563

E : 7” Reel up

side down

taping

10ohm

56Kohm

1% E24+E96:3 significant

digits

followed by No. of zeros

100

=1000

=3742

37.4K

Tape packaging WF12, WF10, WF08, WF06 : 8mm width paper taping 5,000pcs per reel.

WF04: 8mm width paper taping 10,000pcs per reel.

WF25, WF20: 12mm width plastic taping 4,000pcs per reel.

Page 6 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

TEST AND REQUIREMENTS

Basic specification : JIS C 5201-1 : 1998

TEST

PROCEDURE

REQUIREMENT

Clause 4.8

Natural resistance change per change in degree Refer to quick reference data for T.C.R

centigrade.

specification

Temperature Coefficient

of Resistance (TCR )

R₂ R

10⁶(ppm/C)

₁t₂t₁

R₁: Resistance at reference temperature

R₂: Resistance at test temperature

t₁: 20°C+5°C-1°C

Clause 4.13

5.0× Rated power or Max. Overload Voltage for 5 sec.

Measure resistance after 30 minutes..

R/R max. J:≦ ±(2%+0.1)

B,D, F:≦ ±(1%+0.05)

Short time overload

Un-mounted chips completely immersed for 10±1second

in a SAC solder bath at 260℃±5ºC

Clause 4.18

No visible damage

R/R max. J:≦ ±(1%+0.1)

B,D, F:≦ ±(0.5%+0.05)

Resistance to soldering

heat

Clause 4.17

Un-mounted chips completely immersed for 2±0.5

second in a SAC solder bath at 235℃±5℃

Good tinning (>95% covered)

No visible damage

Solderability

Clause 4.18

Un-mounted chips completely immersed for 60±1second Ditto

in a solder bath at 260℃±5℃

Leach Test

Clause 4.19

30 minutes at -55°C±3°C, 2~3 minutes at 20°C+5°C-1°C, No visible damage

30 minutes at +155°C±3°C, 2~3 minutes at

Temperature cycling

R/R max. J≦ ±(1%+0.1)

20°C+5°C-1°C, total 5 continuous cycles

B,D,F≦ ±(0.5%+0.05)

Clause 4.25

1000 +48/-0 hours, loaded with RCWV or Vmax in No visible damage

chamber controller 70±2ºC, 1.5 hours on and 0.5 hours

off

Load life (endurance)

R/R max. J≦ (3%+0.1)

B,D,F≦ (1%+0.05)

Clause 4.24

1000 +48/-0 hours, loaded with RCWV or Vmax in No visible damage

humidity chamber controller at 40C2C and 90~95%

Load life in Humidity

R/R max. J≦ (3%+0.1)

B,D,F≦ (1%+0.05)

No visible damage

relative humidity, 1.5hours on and 0.5 hours off

Clause 4.33

Resistors mounted on a 90mm glass epoxy resin

PCB(FR4); bending : 2 mm(2512;2010) 3mm(1206),

once for 10 seconds

R/R max. J≦ ±(1%+0.1)

Bending strength

B,D,F≦ ±(0.5%+0.05)

Clause 4.32

Pressurizing force: 5N, Test time: 10±1sec

No remarkable damage or removal of the

terminations

Adhesion

Insulation Resistance

Apply the maximum overload voltage (DC) for 1minute

R≧10GΩ

Clause 4.6

Dielectric Withstand

Voltage

Apply the maximum overload voltage (AC) for 1 minute

No breakdown or flashover

Clause 4.7

Page 7 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

PACKAGING

Paper Tape(WF12P, WF10P, WF08P, WF06P, WF04P) & Plastic Tape(WF25P;WF20P)

(unit :mm)

Series No.

WF25P

6.90±0.20

3.60±0.20

12.00±0.30

5.50±0.10

1.75±0.10

5.50±0.20

3.60±0.20

2.40±0.20

1.90±0.20

1.20±0.10

2.80±0.20

2.00±0.20

3.00±0.20

1.65±0.20

1.10±0.20

0.70±0.10

WF20P

WF12P

WF10P

WF08P

WF06P

WF04P

8.00±0.30

3.50±0.20

1.75±0.10

Series No.

WF25P

WF20P

WF12P

D

Max. 1.2

0.1

4.00±0.10

1.50

0.0

Max. 1.0

0.1

0.0

4.00±0.10

2.00±0.10

4.00±0.10

WF10P

WF08P

1.50

0.1

0.0

Max. 1.0

0.65±0.05

0.40±0.05

1.50

0.1

0.0

WF06P

1.50

0.1

0.0

WF04P

1.50

Reel dimensions

Page 8 of 9

ASC_WFxxP_V03

MAR - 2017

Approval sheet

(unit : mm)

Reel / Tape

7” reel for 12mm tape

12.4±1.0

13.0±0.2

178.0±2.0

60.0±1.0

7” reel for 8mm tape

9.0±0.5

Page 9 of 9

ASC_WFxxP_V03

MAR - 2017

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