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M54123LK-D08-T Datasheet(PDF) 7 Page - Unisonic Technologies

Part # M54123LK-D08-T
Description  EARTH LEAKAGE CURRENT DETECTOR
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

M54123LK-D08-T Datasheet(HTML) 7 Page - Unisonic Technologies

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M54123L
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
7 of 9
www.unisonic.com.tw
QW-R122-001,D
TYPICAL APPLICATION CIRCUIT
High-Speed Leakage Circuit Breaker With UTC M54123L
UTC M54123L
Trip
Coil
VS
GND
AC
Line
ZCT
SCR (Note)
CR2AM
CR03AM
CRO2AM
Note: Gate current must be selected.
Please select voltage resistance by AC supply voltage
R2
RL
1
2
4
5
6
7
3
8
RP=100Ω
C6
C4
AC
Line
C1
C2
C3
C5
R1
{
Note: The value of R1, R2, C4, and C5 should be chosen in order to keep at least 12V in Vs.
Please connect C4 (>1μF) and C2 (<1μF).
ZCT and load resistance RL of ZCT are connected between input pin 1 and 2.
Protective resistance (RP=100Ω) must be insurted.
RL and amplifier’s output (in Pin 4) regulates sensitivity current
External capacitor C1 between pin 4 and GND is used for noise removal.
Please connect a varistor or a diode (2 pcs.) to ZCT in parallel, because of when large current is grounded in the
primary side (AC line) of ZCT, the following situation can be abandoned: The wave form in the secondary side of
ZCT is distorted and some signals do not appear in the output of amplifier.
Please connect capacitor (about 0.047μF) between pin 6 and pin 7.
Capacitor C6 between pin 1 and GND is about 0.047μF for removing noise.
170
30
7
5
3
1
100
50
Operating Time vs. Input Voltage
Input Voltage, V1 (mVrms)
10
300 500 1000
3
5
70
30
7
100
50
10
300
500
1000
700 C1=0.047µF
Ta=25°C
60Hz


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