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WRM0204Y221RD

Description
Fixed Resistor, Metal Film, 0.25W, 221ohm, 200V, 0.5% +/-Tol, 15ppm/Cel, Surface Mount, 1406, MELF
CategoryPassive components    The resistor   
File Size113KB,4 Pages
ManufacturerTT Electronics plc
Websitehttp://www.ttelectronics.com/
Environmental Compliance
Download Datasheet Parametric View All

WRM0204Y221RD Overview

Fixed Resistor, Metal Film, 0.25W, 221ohm, 200V, 0.5% +/-Tol, 15ppm/Cel, Surface Mount, 1406, MELF

WRM0204Y221RD Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
Objectid2006958789
package instructionMELF
Reach Compliance Codecompliant
ECCN codeEAR99
JESD-609 codee3
Manufacturer's serial numberWRM
Installation featuresSURFACE MOUNT
Number of terminals2
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Package shapeCYLINDRICAL PACKAGE
method of packingTR, BLISTER
Rated power dissipation(P)0.25 W
Rated temperature70 °C
resistance221 Ω
Resistor typeFIXED RESISTOR
size code1406
surface mountYES
technologyMETAL FILM
Temperature Coefficient15 ppm/°C
Terminal surfaceTin (Sn)
Terminal shapeWRAPAROUND
Tolerance0.5%
Operating Voltage200 V
Mini Melf
Resistors
WRM Series
Welwyn Components
High reliability
Predictable pulse handling capability
Tolerances down to 0.1%
TCR down to 5 ppm/°C
Electrical Data
WRM 0102
Power rating at 70°C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
Insulation resistance
k/W
°C
ohms
250
watts
ohms
volts
ppm/°C
%
0.2
R22 – 2M21
150
15, 25, 50
WRM 0204
0.25
R22 – 10M
200
5, 15, 25, 50
0.1, 0.25, 0.5, 1.0
E24 & E96
200
-55 to +125
>10
10
140
WRM 0207
0.4
R22 – 8M2
300
25, 50
Physical Data
Dimensions (mm) and weight (g)
Type
WRM 0102
WRM 0204
WRM 0207
L
max
2.2
3.6
5.8
L
1
min
1.2
1.8
2.8
D
max
1.1
1.4
2.2
D
1
max
1.1
1.4
2.2
D
1
min
1.06
1.25
2.0
K
max
0.45
0.85
1.4
K
min
0.35
0.5
1.1
Weight
t per unit
0.01
0.02
0.08
L
D
1
L
1
K
D
Construction
A metal film is deposited onto a high dissipation ceramic
former to which solder plated teminating caps are fitted.
The resistor is adjusted to value by a helical cut in the film
and the body is protected by a lacquer coating.
Terminations
Material
Plated steel cap.
Solderability
The terminal caps have a multi-layer coating
of nickel-copper-nickel and pure tin. The pure
tin finish produces ageing free contacts on
which low melting solders can be used.
Dipped area shall be covered with a smooth
and bright solder coating after 3 seconds
immersion at 215°C.
Marking
Resistance values are colour coded with 5 bands.
The TCR is also colour coded as detailed below.
TCR 50 ppm – No Dot
TCR 25 ppm – Yellow Dot
TCR 15 ppm – Orange Dot
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuit boards.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue C · 04.03
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
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