WMZ12A Serisi PTC Aşırı Akım Koruması termistörleri

1)Application
WMZ12A Series thernistors is for Over-current Protection of the Charger, Adaptor (Primary Coil), E-Meter, Multimeter, Telecom Equipment etc.

2)Specification
1. Curie Temp: 50 - 50C 75 - 75C 85 - 85C 105 - 105C 120 - 120
2. Max Diameter: S - φ 4.5 A - φ 6.5 B - φ 8.5 LB-φ 10 M-φ 11.5 SL-φ 14.5
3. Rated Zero Power Resistance (R)N: 1R0- 1Ω 4R7-4.7Ω 15R-15Ω 101-100Ω
4. Tolerance of Resistance: V - ± 25% M - ± 20% K - ± 10%
5. Shape of Leads: U - In-formed S - Straight A - Axis-formed
6. Leads material: U: Cu (P: Cp )
7. Max. Non Operating Current: 200-200mA 060-60mA 008-8mA
8. Packing Type: B - Bulk (A - Ammo R - Reel )
9. Leads Length: 5: 5mm (10: 10mm)
10. Coating Material: S-Black Silicone G-Green Silicone P-PF Resin E-Epoxy N-No Coating
11. Leads Diameter: 5-φ 0.5 6-φ 0.6 8-φ 0.8 1-φ 1.0.
12. Leads Distance: A-2.5 B-5.0 C-7.5 D-10.0

3)General
WMZ12A(I/II)Series is the new generation of components for over current protection. Its safety characteristics passed the testing and meet the requirements of UL1434. It can do protection and recovery automatically and repetitively without contacting spot, noise and spark.

WMZ12A(I/II) Series PTC Thermistor is designed specially for over current protection of the Ballast / CFL / Adaptor / Charger / Watt-hour Meter / Multimeter / Telecom / Micromotor etc, as show as the example of application. When the circuit protected is at normal state, current through the PTC thermistor will be lower than its Max. Non-operating Current (IN).

At this time Rt is at low-resistance state, and it won't affect the normal work of the circuit protected. While abnormal things (such as over current ) happen, the current will be much higher than its Trip Current (IT), and then Rt will change into high-resistance state very quickly. So the circuit protected will be at open state and non-damaged. After the abnormal things disappear and the temperature & the current recover to normal state, Rt will return to low-resistance state automatically and the circuit protected will recover to normal operating state.

Rt's current characteristics is the most important thing to be considered when make a choice of WMZ12A(I/II)series. Its Max. Non-operating Current shall be reasonably higher than rated operating current through the circuit protected and the criterion is that Rt can respond in time and won't trip by mistake. Furthermore, another thing must be especially noticed is: Rt's Max. Operating / Non-operating characteristics is closely correlative with the ambient temperature. IT & IN will decrease while the ambient temperature increases, as show as Figure II.