BT8-8 BELL TRANSFORMER

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Summarize

Application scope
Bell transformer is applicable to circuit of AC 50Hz, operating voltage up to 250V. With output power capacity 3.8VA and 8VA, the product functions as ideal and safe power supply for household door bell
Standard
EN61558-1
EN61558-2-8

Construction features

The product is of safety insulating type. Preferable components are used and secure high performances to the product: 0.5 quality silicon steel is adopted for less non-load consumption and less noise; Special framework of the coil bobbin has high insulation level; well-designed terminal case ensures easy and firm terminal connection. The functioning part is installed in the moulded case after being insulated.
1. Temperature rising is less than 30? with load less than 8VA.
2. Output voltage has high accuracy with tolerance within 3% of rated output voltage.
3. The product can withstand over-load up to 25% within 24 hours.

Order note

1. product type & designation, rated power, input voltage and output voltage and quantity are required to be specified.
2. special requirements are subject to further discussion

Product's advantage

1.Our products have the guarantee period of 36 calendar months,that is a high quality and reliability;
2.our products have an excellent ratio between price and quality ,you can possess them by competitive price and high quality;
3.The fast and flexible production form aim at the customer require;
4.The deliveries exactly in accordance with customer orders
5.The fast transportation.

Normal operation and mounting requirement

·Circumstance temperature -5°C~ +40°C, average temperature not exceeding 35°C.
·Altitude above sea level less than 2000 m.
·Humidity not exceeding 50% at 40°C and not exceeding 90% at 25°C.
·Installation class II or III.
·Pollution class 2.
·Installation method DIN Rail mounting type.
·The external magnetism shall not be more than 5 times of terrestrial one.
·Product shall be installed vertically at the place where there shall be no severe impact and vibration. The product is switched on when the handle is at upper position.

Main technical parameters

Type	Rated Output Power P2(VA)	Rated Voltage		No-load current I 0 ( A)	No-load losses P 0 (W)	Coil Temperature Rising Δτm(℃)
		Primary U1(V)	Secondary U2(V)
BT－3.8	3.8	230(240)	12	0.011	0.5	30
			16
			24
BT－8	8	230(240)	4	0.032	0.9	45
			6
			8
			10
			12
			16
			24

Overall and mounting dimensioned chart