L37S D15

CURRENT SENSORS

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Magnetic Proportion System / Through Type

L37S D15 SERIES【STANDARDS】
・UL508
・EN 62477-1

Introduction

RoHS

ABSOLUTE MAXIMUM RATINGS
Unit

Value

VCCV± 18V

CommentISOLATION CHARACTERISTICS
Parameters
Insulation voltage

Symbol

Unit

Value

Vd―

AC3600V，for 1minute（Sensing current 0.5mA）

Comment
Primary ⇔ Secondary
Primary ⇔ Secondary
Input waveform：
・Front time 1.2µs
・Time to half value 50µs
・single

Vw

kV

6.6

Insulation resistance

RIS―≧ 1000M Ω（at DC500V）

Primary ⇔ Secondary

Clearance distance (Requirement
distance according to safety standard)dCl―5.5mm（MIN）

Primary ⇔ Secondary

Creepage distance (Requirement
distance according to safety standard)

dCp―6.0mm（MIN）

Primary ⇔ Secondary

Case material――

UL94 V-0

Filler material――

UL94 V-0

Case

CTIV

200 （ group IIIa ）FillerCTIV

600 （ group Ⅰ ）Closed loop

Impulse withstand voltage

Comparative tracking
index;（CTI）

ENVIRONMENTAL AND MECHANICAL CHARACTERISTICS
Parameters

Value

SymbolUnit

Ambient operating temperature

TA℃－ 40＋ 85

Ambient storage temperature

TS℃－ 40＋ 85Massmg

60Internal magnetic core――Silicon steel

MIN

TYP

81

Fluxgate system

Supply voltage

SymbolOpen loop

Parameters

MAX

Comment

L37S D15

CURRENT SENSORSSPECIFICATIONS

Primary norminal current ＊ 1

Symbol

Unit

Value
MIN

50

L37S100D15＊100

Introduction

IPN

400

L37S500D15＊500

L37S600D15＊600

L37S050D15＊－ 150150

L37S100D15＊－ 300

300－ 600600

－ 900

900

L37S400D15＊－ 1000

1000

L37S500D15＊－ 10001000－ 10001000

L37S200D15＊IPM

A

L37S600D15＊
Supply voltage

Vcc

VConsumption current

Icc

mAVo

V

Rated output voltageOpen loop

Offset voltage ＊ 3± 12（± 5%）± 15（± 5%）
1520

3.960

4.0004.040

L37S050D15＊－ 0.0300.000＋ 0.030

L37S100D15＊－ 0.0200.000＋ 0.020

L37S200D15＊－ 0.0200.000＋ 0.020－ 0.0200.000＋ 0.020

L37S400D15＊－ 0.0200.000＋ 0.020

L37S500D15＊－ 0.0200.000＋ 0.020

L37S600D15＊－ 0.0200.000＋ 0.020

L37S300D15＊

Hysteresis error
Temperature coefficient of Vo
Temperature coefficient of Vof300

A

L37S400D15＊

L37S300D15＊VofVat Ip = 0A,Icc = 15 + Vout / RL
at IPNat IP = 0A

VOHmV± 20

at 0A → IPN → 0A

TcVo%/℃± 0.1

Without TcVof

L37S050D15＊±2

L37S100D15＊±1

L37S200D15＊±1

L37S300D15＊

CommentMAX200

L37S200D15＊

Primary current, measuring range ＊ 2TYP

L37S050D15＊

L37S300D15＊

Fluxgate system

6 2103

Ta=＋25℃，
RL=10kΩ，
VCC=±15V

Parameters

Closed loop

2/3

TcVof

mV/℃±1

L37S400D15＊±1

L37S500D15＊±1

at IP = 0A

±1

L37S600D15＊
Linearity errorεL%

Response time (at 90% of IPN）＊ 4trµSFrequency bandwidth (-3dB) ＊ 5BWkHz－1150＋1at IP = 0A ～ IPN3di/dt = Ipn or 100A/µs.
Whichever is smaller.
at low current＊ 1 Products with a primary nominal current of 800A are also available. Please contact us for details.
＊ 2 If the product of 300A or less operate at Vcc = ± 12V power supplies, measuring range reduced to 2.5 x IPN.
＊ 3 Offset voltage value is after removal of core hysteresis.
＊ 4 Measurement condition : Primary conductor cross sectional area is as same as through hole, and penetration with 1turn in through hole.
＊ 5 High fundamental frequency primary current and/or harmonic current may result in excessive heating in magnetic core (Silicon steel).

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L37S D15

CURRENT SENSORS

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6 2103

STANDARDSEN62477-1:2012, EN62477-1:2012/A1:2017 and EN62477-1:2012/A11:2014
Rated voltage
300V, CAT Ⅲ , PD2, Reinforced isolation, non uniform field
UL508（file № E243511）
Rated voltage
600V, PD2Introduction※ Please refer to the another sheet about conditions of UL Recognition.

Fluxgate systemCONNECTIONDIMENSIONS (mm)L37SxxxD15M

Closed loop

Open loop

L37SxxxD15J

Terminal number
Note

1 ＋Vcc（＋15V）
2 －Vcc（－15V）
3 Vout
4 GND

It is different from how to put
the pin numbering of connector
manufacturer (JST). It changes tothe expression of the Molex product.

Note・Recommended fastening screw type : M4 with flat washer and spring washer
・Recommended fastening torque : < 1.5 N・m

Unless otherwise specified tolerances shall be ± 0.5mm.

Order number and Connector number (terminal plating)
For the L37SxxxD15 series, there are some types with different secondary side connectors. It is determined by the characters that
follow the series name. Please do not omit the model number when ordering.
Connector

Types

Old Part Number

Plating of terminal

L37SxxxD15M

StandardMolex

22-04-1041

5045-04A

Sn

L37SxxxD15M-A

Build to Order

Molex

22-11-1041

5045-04AG

Au

Standard

JST

B4B-XH-A-GーAu

L37SxxxD15J

Manufacturer

Part Number＊ Rated current (3 figures)＊ As for the L37SxxxD15M series of a gold-plated connector, ’-A’attaches to the end of the product name.
＊ The pin number of L37SxxxD15J are different from those of the connector manufacturer (JST). It is matched to the Molex type.

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Notices

CURRENT SENSORS

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3 1510

Important Notice
7. This product is not designed to resist radiation.

1. The content of this information is subject to change without

vehicle equipment, safety devices, and so on) in which・U se in liquids such as water, oil, chemical solutions, ororganic solvents, and use in locations where the product will
be exposed to such liquids.
・U se that involves exposure to direct sunlight, outdoor
exposure, or dusty conditions.
・Use in locations where corrosive gases such as sea winds,
Cl2, H2S, NH3, SO2, or NO2, are present. (Some productimproves durability)・U se in environments with strong static electricity orelectromagnetic radiation.
・Use that involves placing inflammable material next to theproduct.
・Use of this product either sealed with a resin filling or coatedwith resin.
・Use of water or a water soluble detergent for flux cleaning.
・Use in locations where condensation is liable to occur.

extremely high quality and high reliability is required, or if

8. D o not use or otherwise make available the TAMUTA

the malfunction or failures of product could be cause loss ofproducts or the technology described in this document for any

human life, bodily injury.

military purposes, including without limitation, for the design,prior notice for the purpose of improvements, etc. Ensure thatyou are in possession of the most up-to-date information whenusing this product.
2. T his product is intended to be used in general electronics
applications (electric home appliances, business equipment,
information equipment, communication terminal equipment,
measuring devices, industrial equipment, and so on). This
product is neither intended nor warranted for use in following
equipment or devices:
Special application (such as for medical devices,transportation equipment, traffic signal control equipment,
fire and crime prevention equipment, aeronautics andspace devices, nuclear power control, fuel control, in-Tamura Corporation shall not be held responsible for any

development, use, stockpiling or manufacturing of mass

damage incurred by customers or any third party when products

destruction weapons (e.g. nuclear, chemical, or biologicalare used in special application, unless specifically permitted inweapons or missile technology products). When exporting

this document.

and re-exporting the products or technology described in thisdocument, you should comply with the applicable export control

3. Tamura Corporation constantly strives to improve quality andlaws and regulations and follow the procedures required byreliability, but malfunction or failures are bound to occur withsuch laws and regulations including, without limitation, Japansome probability in current sensor. To ensure that failures do-Foreign Exchange and Foreign Trade Control Law and U.S.-

not cause accidents resulting in injury or death, fire accidents,

Export Administration Regulations. The TAMURA productssocial damage, and so on, users are to thoroughly verify theand related technology should not be used for or incorporated

safety of their designs in devices and/or systems.

into any products or systems whose manufacture, use, or saleis prohibited under any applicable domestic or foreign laws or4. The operation examples and circuit examples shown in thisregulations.

information are for reference purposes only, and Tamura
Corporation disclaims all responsibility for any violations of

9. Please contact your TAMURA sales office for details as toindustrial property rights, intellectual property rights and any

environmental matters such as the RoHS compatibility ofother rights owned by Tamura Corporation or third parties that

Product. Please use TAMURA products in compliance with allthese may entail.

applicable laws and regulations that regulate the inclusion or

5. T he circuit examples and part constants listed in theseuse of controlled substances, including without limitation, thespecifications are provided as reference for the verification

EU RoHS Directive. TAMURA assumes no liability for damagesof characteristics. The user is to perform design, verification,or losses occurring as a result of your noncompliance withand judgment under his or her own responsibility, taking into

applicable laws and regulations.

account the various conditions.

10. T
 AMURA assumes no liability for damages or losses incurred by
you or third parties as a result of unauthorized use of TAMURA

6. T he products are designed for use in environments whereproducts.

consumer electronics are commonly used. It is not designed foruse in special environments such as listed below, and if such

11. T his document and any information herein may not be

use is considered, the user is to perform thorough safety andreproduced in whole or in part without prior written permission

reliability checks under his/her responsibility.

from TAMURA.

9

Appli note

CURRENT SENSORS

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3 1709Application notes<General Considerations><Open loop>

1. T he sensor uses polar electronic components. When the1. High frequency primary current may result in excessive heating

polarity of the power supply is mistaken, the sensor is damaged.

in iron magnetic core and cause damage to internal circuitry;

2. Static electricity or excessive voltage can increase an offset

for high frequency applications select current sensor with ferrite

voltage in the Hall element, and cause offset voltage to change.

core material.
2. If the measured current exceeds the rated current, magnetic

Please exercise care in handling and application.

core saturation will occur and the output voltage signal will not

3. In order to prevent the influence of noise, the use of twisted

be linearly proportional to the measured current.

cable or shielded cable for the output line is recommended
4. If using this device within a magnetic field generated by otherdevices, the specified accuracy may not be obtainable.

<Closed Loop>

5. O ur products（several models are excluded ）are adjusted

1. For closed loop current sensors please insure the power supply

with the trimming method by the measurement condition

voltage is balanced, symmetrical, and, applied simultaneously（Load resistance, Power supply voltage）of specification

to avoid potential increase in DC offset error.

sheets. Therefore, characteristics（Offset, Output, etc.）and its

2. Maximum rated current measurement duration is timedependent.

deviation may be changed in different circuit conditions from

Maximum rated current applied in excess of the time limit canthe measurement condition. All change characteristic items are

result in damage to internal electronic circuitry; please consult

not indicated on specification sheets.

Tamura for assistance.

6. The performance of current sensors with through-hole（aperture）

3. When using a measurement resistor to convert current output

is dependent on the position of the primary conductor. Tamura

to voltage output select a resistor with stable temperature

specifications are based on a primary conductor completely

characteristic to insure accuracy of the output voltage.

filling the through-hole（aperture）area.

4. Compensation current supplied to the secondary winding varies

7. T he current sensor rated current in DC Amps.

in proportion to the measured current based on the conversion

8. Please use mating connector with equivalent terminal platingratio.（If/KN; KN ＝ secondary turns）Please insure the PSU

material to insure proper operation and avoid possibility ofhas required current capacity to supply compensation current‘galvanic corrosion’.

to the secondary winding.

9. P lease do not store in high-temperature and high-humidity
storage environment. Please use it after confirming soldering<Flux-Gate>

when it is kept for six months or more.（product soldered with

1. Compensation current supplied to the secondary winding varies

substrate）
10. We recommend performing a zero offset adjustment by measuring

in proportion to the measured current. Please insure the PSU

the offset voltage at startup. In continuously operation for a few

has required current capacity to supply compensation current
to the secondary winding.

months, or at change of ambient temperature or humidity is large,

2. T here is 450kHz ripple voltage present on the output and

we recommend regularly performing a zero offset adjustment atreference output voltage signals . An external capacitor maybe

being idling（it is clear that the current is not apply）.

added if necessary.

11. The current sensor doesn't have built-in protection circuit(devices and fuses, etc.). As a failure mode of the sensor,
there is a short circuit and open state. In the case of a shortcircuit state, the abnor-mal temperature rise of the internal
parts is assumed, and there is a possibility to smoke and toignite. If it is used in safety critical circuit blocks, please takeappropriate measures by protection devices, protection circuits,etc. For closed loop –type sensors and flux gate (closed looptype) sensors, the consumption current of the secondary power
supply varies in proportion to the measurement current.

7