WK25L273JTLV datasheet, PDF - EEWORLD Datasheet

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WK25L273JTLV: DescriptionFixed Resistor, Metal Glaze/thick Film, 2W, 27000ohm, 200V, 5% +/-Tol, 200ppm/Cel, Surface Mount, 1225, CHIP; CategoryPassive components The resistor; File Size483KB，8 Pages; ManufacturerWalsin Technology Corporation; Environmental Compliance

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WK25L273JTLV Overview

Fixed Resistor, Metal Glaze/thick Film, 2W, 27000ohm, 200V, 5% +/-Tol, 200ppm/Cel, Surface Mount, 1225, CHIP

WK25L273JTLV Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Walsin Technology Corporation
package instruction	CHIP
Reach Compliance Code	compliant
Other features	LASER TRIMMABLE
structure	RECTANGULAR PACKAGE
Installation features	SURFACE MOUNT
Number of terminals	2
Maximum operating temperature	155 °C
Minimum operating temperature	-55 °C
Package height	0.55 mm
Package length	6.3 mm
Package form	SMT
Package width	3.2 mm
method of packing	TR, Plastic, 7 Inch
Rated power dissipation(P)	2 W
Rated temperature	70 °C
Guideline	AEC-Q200
resistance	27000 Ω
Resistor type	FIXED RESISTOR
size code	1225
surface mount	YES
technology	METAL GLAZE/THICK FILM
Temperature Coefficient	200 ppm/°C
Terminal shape	WRAPAROUND
Tolerance	5%
Operating Voltage	200 V

WK25L273JTLV Preview

Approval sheet

WK12L, WK20L, WK25L

1%, 5%

Thick Film Power Chip Resistor

Wide Termination

RoHS compliant and Halogen free

Size 0612, 1020, 1225

Automotive AEC Q200 Compliant

ASTM B-809-95 Compliant

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

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FEATURE

High power rating and compact size

High reliability and stability

Reduced size of final equipment

RoHS compliant and Halogen free products

AEC Q200 Compliant

ASTM B-809-95 60’C 1000hrs compliant

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 at

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

Fig 2. Construction of Chip-R

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Approval sheet

QUICK REFERENCE DATA

Item

Series No.

Size code

Resistance Tolerance

Resistance Range

TCR (ppm/C) :

Max. dissipation at T

amb

=70C

Max. Operation Voltage (DC or RMS)

Max. Overload Voltage (DC or RMS)

Climatic category (IEC 60068)

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



200 ppm/C

3/4W

200V

400V

WK12L

0612(1632)

General Specification

WK20L

1020 ( 2550 ),

5%

(E24);

1%

(E24+E96)

1 ~ 1M,



200 ppm/C

200V

400V

55/155/56



200 ppm/C

200V

400V

WK25L

1225(3264)

RCWV

RatedPower



Resistance Value

or Max. RCWV listed above, whichever is lower.

MECHANICAL DATA (unit : mm)

TYPE

WK12L

3.200.20

1.600.20

0.550.10

0.500.25

WK20L

5.000.20

2.500.15

0.550.10

0.600.20

WK25L

6.300.20

3.200.20

0.550.10

0.600.20

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MARKING

Each resistor is marked with

value.

Example:

1R00

3901

1101

a four-digit code on the protective coating to designate the nominal resistance

1

3900

1100

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.3

Figure 3. Maximum dissipation in percentage of rated power

as a function of the ambient temperature.

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.

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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 4.

Fig 4. Infrared soldering profile for Chip Resistors

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

WK12

Size code

WK25 : 1225

WK20 : 1020

WK12: 0612

Type code

L : wide

termination

472_

Resistance code

E24 : 2 significant

digits followed by no.

of zeros and a blank

4.7

10

=4R7_

=100_

Tolerance

J :

5%

F :

1%

P : Jumper

Packaging code

T : 7” Reel

taping

Termination

code

Sn base

(lead free)

Special code

V =

AEC Q200

Compliant +

ASTM B-809-

95 Compliant

1% E24+E96:

3 significant

digits followed by no.

of zeros

102

37.4K

=1020

=3742

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