ULW3-47RJA1 TT Electronics/Welwyn, ULW3-47RJA1 Datasheet

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ULW3-47RJA1

Manufacturer Part Number
ULW3-47RJA1
Description
RES 47 OHM 3W 5% AXIAL
Manufacturer
TT Electronics/Welwyn
Series
ULWr
Datasheet
1.ULW2-33RJA25.pdf (5 pages)

Specifications of ULW3-47RJA1

Featured Product
ULW Series Wirewound Resistors
Resistance (ohms)
47
Number Of Terminations
2
Package / Case
Axial
Power (watts)
3W
Composition
Wirewound
Features
Flame Proof, Fusible
Temperature Coefficient
±200ppm/°C
Tolerance
±5%
Size / Dimension
0.228" Dia x 0.571" L (5.80mm x 14.50mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Height
-
Other names
985-1009-3
UL Recognised
Wirewound Resistors
ULW Series
·
·
·
·
·
·
* UL file number E234469.
Electrical Data
Note - no limiting element voltage applies; maximum continuous voltage is √(P.R)
Physical Data
Construction
A high purity ceramic rod is assembled with interference fit end caps to which are welded the terminations. The surge withstanding resistive element
is wound on the rod and welded to the caps. Flameproof fusible cement coating is applied prior to marking with indelible ink. The components are
then leadformed if required and packed.
Marking
ULW2 & ULW3 resistors are marked with five colour bands. The first four indicate value and tolerance in conformance with IEC62. The fifth yellow
band denotes defined fusibility. ULW4 and ULW5 resistors are legend marked with type, value and tolerance.
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.
© Welwyn Components Limited
Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Power rating at 25°C
5 second overload rating at 25ºC
Inrush / surge performance
Resistance range
TCR
Isolation voltage
Resistance tolerance
UL recognised standard values
Thermal impedance
Ambient temperature range
ULW2
ULW3
ULW4
ULW5
Type
UL1412 recognised fusible resistor *
Failsafe mains fusing at 120 / 240Vrms
Inrush and surge withstanding
UL94-V0 flameproof coating
SMD leadform option available
RoHS compliant
L Max
14.5
16.5
9.0
13
D Max
3.8
5.8
5.6
7.2
Dimensions (mm) and weight (g)
f min
19.8
24.6
22.8
23.6
· Bedlington, Northumberland NE22 7AA, UK
d nom
0.8
ppm/°C
°C/watt
centres
mount
watts
ohms
watts
ohms
12.7
20.3
18.9
22.9
volts
PCB
°C
%
22, 33, 47, 68, 100
radius
bend
Min
1.2
22 to 100
ULW2
250
110
10
2
Nom
Wt.
0.5
1.1
1.0
1.8
10, 22, 27, 33, 47,
10 to 100
See Pulse Performance graphs
68, 100
ULW3
350
d
15
82
3
-55 to +155
D
±200
5
Welwyn Components
ULW4
20
10
10
62
L
4
500
4R7, 10, 22, 27,
33, 47, 68, 100
f
4R7-100
TT electronics plc
ULW5
A subsidiary of
25
54
5
01. 11

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ULW3-47RJA1 Summary of contents

Page 1

... Marking ULW2 & ULW3 resistors are marked with five colour bands. The first four indicate value and tolerance in conformance with IEC62. The fifth yellow band denotes defined fusibility. ULW4 and ULW5 resistors are legend marked with type, value and tolerance. ...

Page 2

... Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com Maximum* ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 ΔR% 5 Body Temperature Rise 300 250 200 ULW2 150 100 50 0 200 250 300 0 Welwyn Components Typical 55/200/ ULW3 ULW4 ULW5 Power (W) 01. 11 ...

Page 3

... Note the voltage shown is the nett voltage across the resistor. The generator open circuit voltage will be higher due to the generator's internal impedance. 6 ULW5 5 4 ULW3 & ULW2 100 ULW2 Fusing Characteristic Initial Power (W) Welwyn Components ULW5 ULW3 & 4 ULW2 100 Value (ohms 01. 11 ...

Page 4

... UL Recognised Wirewound Resistors ULW Series Fusing Performance ULW3 & ULW4 Fusing Characteristic Notes: 1. Typical fusing times are around 1/3 of the maximum figures. 2. After fusing the resistance value is >100 times the initial nominal value. 3. Suitable for fusing at voltages up to 264Vrms. Application Notes Application Notes 1. If the resistors are to dissipate full rated power recommended that the terminations should not be soldered closer than 4mm from the body ...

Page 5

... Type Value (use IEC62 code) Tolerance (use IEC62 code Packing A25 ULW2 Ammo A1 ULW3, ULW4 T075 Tape ULW5 © 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 Figure ...

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