WP2S-680RGA15 [TTELEC]
Compact Flameproof Power Wirewound Resistors; 紧凑型矿用隔爆型功率线绕电阻器
| 型号： | WP2S-680RGA15 |
| 厂家： | 
TT Electronics |
| 描述： | Compact Flameproof Power Wirewound Resistors |
| 文件： | 总4页 (文件大小：451K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Compact Flameproof Power
Wirewound Resistors
Welwyn Components
WP-S Series
• Small size for power rating
• Enhanced pulse handling capability
• Flameproof protection
• SMD Z-form available
• RoHS compliant with Pb-free terminations
Electrical Data
WP1S
WP2S
2
WP25S
2.5
WP3S
3
WP4S
4
WP5S
5
WP7S
7
Power rating at 25°C
5s overload rating at 25ºC
Short pulse performance
Resistance range
watts
watts
1
5
10
12.5
15
20
25
35
See Pulse Performance graphs
R068 to 430R R05 to 900R R05 to 900R R01 to 2K2
ohms
volts
R01 to 10K R015 to 6K8 R15 to 10K
Limiting element voltage
TCR
50
50
75
100
100
150
150
ppm/°C
volts
<1R: 350
≥1R: 200
Isolation Voltage
250
350
500
700
Resistance Tolerance
%
<R10: 5
≥R10: 1, 2, 5
<20R: 5 ≥20R: 1, 2, 5
<20R: 5 ≥20R: 1, 2, 5
Standard Values
E24 preferred
82
Thermal Impedance
°C/watt
°C
140
110
90
62
54
35
Ambient temperature range
-55 to +155
Physical Data
Dimensions (mm) & Weight (g)
Type
L max
D max
f min
d nom
0.6
PCB
mount
centres
Min
bend
radius
Wt.
nom
D
WP1S
WP2S
WP25S
WP3S
WP4S
WP5S
WP7S
6.2
9.0
2.8
3.6
4.5
5.2
5.6
7.0
8.8
21.20
19.80
17.80
24.55
22.75
23.55
28.30
10.20
12.70
18.40
20.30
18.90
22.86
31.40
0.6
0.22
0.50
0.50
1.10
1.00
1.75
4.40
12.5
14.5
13
0.8
1.2
L
f
d
16.5
25.0
Construction
A high purity ceramic substrate is assembled with interference fit end caps to which are welded the terminations. The resistive
element is wound on the substrate and welded to the caps. Flameproof silicone cement coating is applied prior to marking with
indelible ink. The components are then leadformed if required and packed.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
TT electronics plc
© 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
Issue E · 07.06
Compact Flameproof Power
Wirewound Resistors
WP-S Series
Welwyn Components
Terminations
Material:
Hot tin dipped copper wire
Strength:
The terminations meet the requirements of IEC 68.2.21
Solderability:
The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2
Marking
WP1S, WP2S, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance with IEC62.
Values below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there is no multiplier
band. WP4S, WP5S and WP7S resistors are legend marked with type reference, resistance value and tolerance.
Solvent Resistance
The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits.
Flammability
The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload.
Performance Data
Maximum
5 +0.001Ω
5 +0.001Ω
5 +0.001Ω
Typical Change
Load at rated power: 1000hrs @ 25°C
Dry heat: 1000hrs @ 200°C
Short term overload (5 x Pr for 5s)
Derating from rated power @25°C
Climatic
∆R%
∆R%
∆R%
3
3
1
Zero at 280°C
55/200/56
∆R%
5 +0.001Ω
2
Climatic category
TRC & Vibration
∆R%
∆R%
∆R%
5 +0.001Ω
5 +0.001Ω
5 +0.001Ω
1
1
1
Robustness & solder heat
Long term damp heat (56 days)
Pulse Performance
The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at
25ºC.
WP-S Short Pulse Energy Capacity
100
10
WP7S
WP5S
WP4S
1
WP3S
WP25S
WP2S
WP1S
0.1
10000
0.1
1
10
100
1000
Value (ohms)
© 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
Issue E · 07.06
Compact Flameproof Power
Wirewound Resistors
WP-S Series
Welwyn Components
Application Notes
1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than
4mm from the body.
2. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An estimate of the
temperature rise to be expected at the center of the body can be calculated using the thermal impedance figures given under
Electrical Data.
3. WP-S resistors can also be supplied with radial, goalpost or lancet pre-formed leads. WP2S, WP3S, WP4S and WP5S are also
available in an SMD format with Z formed leads and packed in blister tape. Consult factory for details.
Radial
Goalpost
Lancet
Z-form
Packaging
The standard packaging for WP-S is taped. The critical dimensions are shown in Figure 1. The component wires will not
protrude beyond the outside edge of the tapes. Taped product is then packed into boxes or onto reels; see Ordering Procedure
for details. Alternative packaging is available by request. Pre-formed resistors are supplied loose packed in plastic bags or boxes.
Figure 1
Dimensions (mm)
WP1S
b
c
52
52
52
67
63
63
85
5
WP2S
5
WP25S
WP3S
5
C
10
10
10
10
WP4S
f1
f2
b
WP5S
6
6
WP7S
Body location f1 - f2 1.4mm
<
© 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
Issue E · 07.06
Compact Flameproof Power
Wirewound Resistors
WP-S Series
Welwyn Components
Ordering Procedure
Example: WP2S at 680 ohms and 5% tolerance in ammo pack box of 2500 pieces -
Type
WP2S
–
680R
J
A25
Value (use IEC 62 code)
Tolerance (use IEC 62 code)
F
G
J
1%
2%
5%
Packing
A5
A25
A15
A1
WP1S
5000/box
2500/box
1500/box
1000/box
1000/box
700/reel
WP2S
WP25S
WP3S
WP4S
WP5S
WP7S
Ammo
Standard
A1
T075
T07
Tape
700/reel
© 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
Issue E · 07.06
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