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Closed loop Hall effect sensor LEM LA25 NP with wide frequency bandwidth and current overload capability

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Closed loop Hall effect sensor LEM LA25 NP with wide frequency bandwidth and current overload capability

working temperature : -40℃~+85℃

Current Range : 5A;6A;8A;12A;25A

Voltage - Supply : ±15V

Band Width : 150kHz

Bidirectional Current Detection : Support

Description : Through Hole Current Sensors RoHS

Mfr. Part # : LA25-NP

Model Number : LA25-NP

Package : Through Hole

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Product Overview

The LEM LA 25-NP is a closed-loop Hall effect current transducer designed for precise electronic measurement of DC, AC, and pulsed currents with galvanic isolation between primary and secondary circuits. It offers excellent accuracy, very good linearity, low temperature drift, optimized response time, and a wide frequency bandwidth, making it suitable for various industrial applications including AC and DC motor drives, UPS, SMPS, and welding power supplies. The transducer features an isolated plastic case recognized according to UL 94-V0 and provides high immunity to external interference and current overload capability.

Product Attributes

Brand: LEM
Origin: Not specified
Material: Isolated plastic case (UL 94-V0 recognized)
Color: Not specified
Certifications: UL 94-V0, EN 50178, IEC 61010-1

Technical Specifications

Parameter	Value	Unit	Notes
Electrical Data
Primary nominal current rms (IPN)	25	A
Primary current, measuring range (IPM)	0 .. 36	A
Secondary nominal current rms (ISN)	25	mA
Conversion ratio (KN)	1-2-3-4-5 : 1000
Supply voltage (VC) ( 5 %)	15	V
Current consumption (IC)	10 + IS	mA
Accuracy - Dynamic performance data
Accuracy @ IPN, TA = 25C	0.5 %		Max
Linearity error (L)	< 0.2	% Typ
Offset current (IO) @ IP = 0, TA = 25C	0.05 / 0.15	mA	Typ / Max
Magnetic offset current (IOM) @ IP = 0 and specified RM, after overload	0.05 / 0.15	mA	Typ / Max
Temperature variation of IO (0C .. + 25C)	0.06 / 0.25	mA	Typ / Max
Temperature variation of IO (+ 25C .. + 70C)	0.10 / 0.35	mA	Typ / Max
Temperature variation of IO (- 25C .. + 85C)	0.5	mA	Max
Temperature variation of IO (- 40C .. + 85C)	1.2	mA	Max
Response time (tr) to 90 % of IPN step	< 1	s
di/dt accurately followed	> 50	A/s
Frequency bandwidth (- 1 dB) (BW)	DC .. 150	kHz
General Data
Ambient operating temperature (TA)	- 40 .. + 85	C
Ambient storage temperature (TS)	- 45 .. + 90	C
Primary coil resistance per turn (RP) @ TA = 25C	< 1.25	m
Secondary coil resistance (RS) @ TA = 70C	110
Secondary coil resistance (RS) @ TA = 85C	115
Isolation resistance (RIS) @ 500 V, TA = 25C	> 1500	M
Mass	22	g
Isolation Characteristics
Rms voltage for AC insulation test (Vd), 50 Hz, 1 min	2.5	kV
Impulse withstand voltage (Vw) 1.2/50 s	9	kV
Creepage distance (dCp)	10.63	mm
Clearance (dCI)	10.63	mm
Comparative Tracking Index (CTI) (group IIIa)	175
Dimensions (mm)
Primary turns	IPN [A]	IP [A]	ISN [mA]	KN	RP [m]	LP [H]	Connections
1	25	36	25	1 / 1000	0.3	0.023	IN(1-5), OUT(6-10)
2	12	18	24	2 / 1000	1.1	0.09	IN(1-5), OUT(6-10)
3	8	12	24	3 / 1000	2.5	0.21	IN(1-5), OUT(6-10)
4	6	9	24	4 / 1000	4.4	0.37	IN(1-5), OUT(6-10)
5	5	7	25	5 / 1000	6.3	0.58	IN(1-5), OUT(6-10)

2410121516_LEM-LA25-NP_C454699.pdf

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