參數(shù)資料
型號： 307C1258
廠商： Vishay Intertechnology,Inc.
元件分類： 熱敏電阻
英文描述： PTC Thermistors For Electronic Fluorescent Ballasts
中文描述： PTC熱敏電阻熒光燈電子鎮(zhèn)流器
文件頁數(shù)： 1/1頁
文件大小： 257K
代理商： 307C1258
Document Number: 23088
Revision 14-May-02
www.vishay.com
10
307C Lighting Thermistors
Vishay Cera-Mite
PTC Thermistors For Electronic Fluorescent Ballasts
ceramite.support@vishay.com
FEATURES
Electrode preheat thermistors for use in compact
fluorescent lamps (CFL) and electronic ballasts.
Current limiting, time-delayed start-up extends lamp life.
Quiet, flicker-free operation.
Developed in cooperation with leading ballast designers.
Both standard and custom parts are available.
Economical, reliable and proven in millions of lamps
throughout the world.
APPLICATION CONSIDERATIONS
Ignition time can be optimized to increase life of lamp.
PTC resistance (R
) is chosen, along with filament
resistance and application voltage, to control desired
electrode preheat current.
Lamp preheat time is determined by time required for
thermistor to switch from low to high resistance state.
Preheat currents shown result in switch times of
approximately 1 second at 25
°
C. Lower currents result in
longer switch times.
FLUORESCENT LAMP
C
PTC
RESISTANCE
R
(OHMS)
150
150
50
70
100
125
150
200
240
300
380
600
600
850
100
150
180
200
300
300
500
800
850
70
70
85
150
85
100
400
INSTANTANEOUS
VOLTAGE
(V
RMS
)
265
280
175
265
260
230
235
320
350
400
410
420
460
450
340
340
350
355
370
420
480
530
520
210
300
210
400
280
310
430
CONTINUOUS
VOLTAGE
(V
RMS
)
80
200
50
150
95
80
90
145
150
165
170
120
200
340
265
150
165
265
75
320
400
450
175
50
140
50
100
60
90
120
PREHEAT
CURRENT
(mA)
215
200
430
350
370
280
260
300
260
225
205
185
170
140
390
400
380
300
270
230
190
155
190
750
725
670
550
820
750
420
D
MAX.
(mm)
4.5
4.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
7
7
7
7
7
7
7
7
7
8.5
8.5
8.5
8.5
10
10
10
PART
NUMBER
307C1407
307C1414
307C1230
307C1654
307C1364
307C1259
307C1253
307C1223
307C1171
307C1225
307C1390
307C1252
307C1224
307C1622
307C1403
307C1306
307C1569
307C1375
307C1242
307C1360
307C1361
307C1362
307C1260
307C1367
307C1366
307C1363
307C1287
307C1258
307C1365
307C1422
PTC THERMISTORS FOR ELECTRONIC FLUORESCENT BALLASTS
5mm
Tinned Copper Clad Steel Wire
24 AWG when D
≤
8.5mm
22 AWG when D
≥
10mm
Note 1:
R
25
- Nominal zero power resistance
±
25% at 25
°
C. For given diameter, higher resistance thermistors offer higher maximum voltages.
Note 2:
Instantaneous Voltage - Maximum rms voltage permitted across thermistor during fluorescent lamp start-up cycle.
Note 3:
Continuous Voltage - Maximum rms voltage continuously applied across thermistor during normal lamp operation.
Note 4:
Preheat Current - rms current (60Hz) which switches thermistor to high resistance in approximately 1 second at 25
°
C ambient.
Note 5:
Size (mass) of PTC influences rate of I
R temperature increase. For given resistance, larger thermistors have longer switch times.
Optional coating slightly increases switch time.
Note 6:
P/N suffix (not shown) describes wire lead forms and other options.
32mm min
4.5mm
LS = 5mm
D
Options:
High Temperature Coating
Short Clipped Leads
Other Wire Forms and Lead
Spacings
1
2
3
4
5
6
相關PDF資料
PDF描述
307C1260BHLAB PTC Thermistors
307C1260BHMAB PTC Thermistors
307C1260 PTC Thermistors
307C1333 PTCR Overcurrent Protection
307C1490 PTCR Motor Start Pellets
相關代理商/技術參數(shù)
參數(shù)描述
307C1259 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:PTC Thermistors For Electronic Fluorescent Ballasts
307C1260 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:PTC Thermistors For Electronic Fluorescent Ballasts
307C1260BHLAB 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:PTC Thermistors
307C1260BHMAB 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:PTC Thermistors
307C1262 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:PTCR Overcurrent Protection
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