Current Transducer LAH 50-P/SP1

For the electronic measurement of currents: DC, AC, pulsed..., withgalvanic separation between the primary circuit and the secondarycircuit.

IP N = 50 AElectrical data
IP N Primary nominal RMS current		
IP M Primary current, measuring range 1)
RM Measuring resistance @ 2)		with ±12 V@ IP N [±A DC]		
@ IP N [A RMS] 2)with ±15 V@ IP N [±A DC]		
@ IP N [A RMS] 2)
IS N Secondary nominal RMS current		

50		
A0 … ±90A
TA = 70 °C TA = 85 °C
RM min RM max RM min RM max
0107
10103 Ω
0531049 Ω
22 16358159 Ω
22 935889 Ω50		mA

NP/NS Turns ratio			UC Supply voltage (±5 %)			
ICCurrent consumption			1 : 1000±12 … 1510 (@ ±15 V) + ISV
mAAccuracy - Dynamic performance data

Delay time to 10 % of the final output value for IP N step%%mA
mA
mA
mA
mA

< 200		tD 90 Delay time to 90 % of the final output value for IP N step 4) < 500		
di/dt di/dt accurately followed			> 200		BW Frequency bandwidth (‒1 dB)		
DC ... 200nsns
A/µs
kHzGeneral dataTATA stRS
mAmbient operating temperature		
Ambient storage temperature		
Resistance of secondary winding @ TA = 70 °C@ TA = 85 °C
Mass			Standards			

Notes:‒25 ... +85‒40 ... +90
72		76
22EN 50178: 1997°C°CΩΩ
g

For 10 s, with RM ≤ 53 Ω
2)
The measuring resistance RM min may be lower		 (see “LAH Technical Information” leaflet of the “LAH Application Note”)
3)
Without IO & IO M
4)
For a di/dt = 100 A/µs.
1)

Special features● IP M = 0 … ±90 A● NP/NS = 1 : 1000.

● Excellent accuracy● Very good linearity● Low temperature drift● Optimized delay time
● Wide frequency bandwidth● No insertion losses● High immunity to externalinterference● Current overload capability.

Applications● AC variable speed drives andservo motor drives● Static converters for DC motordrives● Battery supplied applications● Uninterruptible Power Supplies(UPS)● Switched Mode Power Supplies(SMPS)● Power supplies for welding
applications.

Application domain● Industrial.

Page 1/3

N° 97.34.25.001.0
31March2023/Version 11● Closed loop (compensated)current transducer using the Halleffect● Printed circuit board mounting● Insulating plastic case recognizedaccording to UL 94-V0.

Advantages

εtot
Total error 3) @ IP N, TA = 25 °C		
±0.25		εLLinearity error			< 0.15						Typ Max
IO
Offset current referred to primary @ IP = 0, TA = 25 °C		±300
IO
Offset current referred to secondary @ IP = 0, TA = 25 °C		±0.3
IO M Magnetic offset current @ IP = 0, referred to secondaryand specified RM, after an overload of 5 × IP N
±0.2 ±0.3
IO T Temperature variation of IO,referred to secondary			
0 °C … +70 °C ±0.2 ±0.6
‒25 °C … +85 °C ±0.2 ±0.8
tD 10Features

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

Current Transducer LAH 50-P/SP1
Insulation coordination
UdUNi

RMS voltage for AC insulation test, 50 Hz, 1 min		
Impulse withstand voltage 1.2/50 µs		512kVkV

Partial discharge RMS test voltage (qm< 10 pC)		
>2Ut					 MindCp Creepage distance 1)				 11.75
dCI Clearance 1)				 11.75
CTI Comparative tracking index (group IIIa)		
175

kVmmmmNote: 1) On PCB with soldering pattern UTEC93-703.

Applications examples
According to EN 50178 and IEC 61010-1 standards and following conditions:● Over voltage category OV 3
● Pollution degree PD2● Non-unifom field
EN 50178

IEC 61010-1

Rated insulation voltage

Nominal voltage

Basic insulation

1000 V

1000 V

Reinforced insulation

500 V

500 V

dCp, dCI, UNi

SafetyThis transducer must be used in limited-energy secondary circuits according toIEC 61010-1.

This transducer must be used in electric/electronic equipment with respect toapplicable standards and safety requirements in accordance with the manufacturer’s
operating instructions.

Caution, risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous
voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury
and/or cause serious damage.
This transducer is a build-in device, whose conducting parts must be inaccessible
after installation. A protective housing or additional shield could be used.
Main supply must be able to be disconnected.

Page 2/3
31March2023/Version 11

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

Dimensions LAH 50-P/SP1 (in mm)

dCI

dCp

11.75

11.75

Connection
ISIP

RM

0V+UC−UC

Primary current
Number ofprimary turns

NominalMaximum

15090

IP N [A]Mechanical characteristics● General tolerance● Fastening & connection of primary
Recommended PCB hole
● Fastening & connection of secondary
Recommended PCB hole

IP [A]

Nominal outputcurrentIS N [mA]
50Turns ratio
NP/NS

PrimaryresistanceRP [mΩ]Primary insertion
inductanceLP [µH]1 : 1000

0.120.008

Remarks● IS is positive when IP flows from terminals IN to terminals±0.2 mmOUT.
6 pins 1.4 mm × 1 mm
● The jumper temperature and PCB should not exceed
2 mm
100 °C.
3 pins 0.7 mm × 0.6 mm
1.2 mmPage 3/3
31March2023/Version 11

LEM reserves the right to carry out modifications on its transducers,in order to improve them.

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com