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307C1390BHLAB

更新时间： 2024-10-28 13:04:31
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威世 - VISHAY 电子
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307C1390BHLAB 数据手册

  
307C Lighting Thermistors  
Vishay Cera-Mite  
PTC Thermistors For Electronic Fluorescent Ballasts  
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 (R25) 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.  
PTC THERMISTORS FOR ELECTRONIC FLUORESCENT BALLASTS  
RESISTANCE INSTANTANEOUS CONTINUOUS PREHEAT  
D
MAX.  
(mm)  
FLUORESCENT LAMP  
R25  
VOLTAGE  
VOLTAGE  
CURRENT  
(mA)  
PART  
(OHMS)  
(VRMS  
)
(VRMS  
)
NUMBER  
1
2
3
4
5
6
150  
150  
50  
265  
280  
175  
265  
260  
230  
235  
320  
350  
400  
410  
420  
460  
450  
80  
200  
50  
150  
95  
215  
200  
430  
350  
370  
280  
260  
300  
260  
225  
205  
185  
170  
140  
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  
307C1407  
307C1414  
307C1230  
307C1654  
307C1364  
307C1259  
307C1253  
307C1223  
307C1171  
307C1225  
307C1390  
307C1252  
307C1224  
307C1622  
C
70  
100  
125  
150  
200  
240  
300  
380  
600  
600  
850  
PTC  
80  
90  
145  
150  
165  
170  
120  
200  
340  
Tinned Copper Clad Steel Wire  
24 AWG when D ≤ 8.5mm  
22 AWG when D ≥ 10mm  
5mm  
max  
100  
150  
180  
200  
300  
300  
500  
800  
850  
70  
70  
85  
150  
85  
340  
340  
350  
355  
370  
420  
480  
530  
520  
210  
300  
210  
400  
265  
150  
165  
265  
75  
320  
400  
450  
175  
50  
140  
50  
100  
60  
90  
120  
390  
400  
380  
300  
270  
230  
190  
155  
190  
750  
725  
670  
550  
7
7
7
7
7
7
7
7
7
8.5  
8.5  
8.5  
8.5  
10  
10  
10  
307C1403  
307C1306  
307C1569  
307C1375  
307C1242  
307C1360  
307C1361  
307C1362  
307C1260  
307C1367  
307C1366  
307C1363  
307C1287  
32mm min  
4.5mm  
max.  
LS = 5mm  
D
Options:  
• High Temperature Coating  
• Short Clipped Leads  
• Other Wire Forms and Lead  
Spacings  
280  
310  
430  
820  
750  
420  
307C1258  
307C1365  
307C1422  
100  
400  
Note 1: R25 - 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 I2R 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.  
www.vishay.com  
10  
Document Number: 23088  
Revision 14-May-02  
ceramite.support@vishay.com  
1

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