VSM025A Hall Voltage SensorDetailed product description：

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A voltage sensor utilizing the Hall effect closed-loop principle can measure voltages of DC, AC, pulse, and various irregular waveforms under electrically isolated conditions.

Electrical parameters

	model	VSM025A
IPN	Primary rated input current	ten		mA
IP	Measurement range of primary current	0～±14		mA
ISN	Rated output current on the secondary side	twenty-five		mA
KN	turns ratio	2500：1000
RM	Measure resistance (VC=± 12V)	When IP=± 10mA: 30-350	When IP=± 14mA: 30-235	Ω
	(VC=±15V)	When IP=± 10mA: 100-460	When IP=± 14mA: 100~315	Ω
VC	power supply voltage	±12～±15(±5%)		V
IC	current consumption	VC=±15V 10+Is		mA
Vd	insulation voltage	2.5KV effective value/50Hz/1 minute between the primary and secondary circuits
εL	linearity	<0.2		%FS
X	precision	TA =25℃ VC=±15V ±0.7		%
I0	Imbalance current	TA =25℃ <±0.15		mA
IOT	Imbalance current temperature drift	IP=0 TA =-25～+85℃ <±0.35		mA
Tr	response time	90% of VPN ≤40		μs
TA	Working environment temperature	-25～+85		℃
TS	Storage environment temperature	-40～+100		℃
Rp	Internal resistance of primary coil	TA =25℃ 190		Ω
Rs	Internal resistance of secondary coil	TA =85℃ 55		Ω
	standard	Q/3201CHGL02-2007

Dimensions (mm)

External wiring diagram

Instructions for Use

1. When measuring voltage, the Ri resistor is connected in series on the primary circuit of the sensor. To achieve optimal accuracy of the sensor, the size of Ri should be selected as much as possible to make the input current around 10mA.
2. Scope of work: Considering the internal resistance of the primary coil (compared to Ri, to maintain the temperature difference as low as possible) and isolation, this sensor is suitable for measuring voltages ranging from 10 to 500V. To ensure the stability of measuring resistance, the power of Ri should be at least 4 times the rated power (usually above 10W). 3. When soldering the sensor to the circuit board, a low-temperature soldering iron should be used, and the soldering time should be as short as possible, otherwise it may cause an open circuit in the internal wiring of the pins.
4. The socket position for installing sensors on the circuit board must be completely consistent with the pin size, and the pins should not be artificially squeezed, otherwise it may cause open circuits in the internal wiring of the pins.