Datasheet > LST2757VL2NT1

LST2757VL2NT1

更新时间： 2023-12-06 20:12:52

品牌	Logo	应用领域
力特 - LITTELFUSE		光电二极管压敏电阻
页数	文件大小	规格书
4页	595K
描述
SPD热保护压敏电阻功能与特色应用

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LST2757VL2NT1 数据手册

Varistors Datasheet

LST Varistor Series

SPD Thermally Protected Varistor

Pb RoHS

Description

The LST Varistor Series is constructed a built-in thermal

disconnecting function and electric arc shield that help ensure safe

operation during extreme circumstances of varistor end-of-life or

abnormal overvoltage conditions. It is specifically designed as a

Type 1 Component Assembly Surge Protective Device (SPD) and

is suitable for Type 1 and Type 2 SPDs.

Features & Benefits

■ Short Circuit Current Rating

(SCCR) of 200 kA and

■ Suitably rated forType 1 and

2 SPD applications

Nominal Discharge Current

Rating (In) of 20 kA

■ Same PCB footprint for 50 kA

and 75 kA Imax

■ Available in both Maximum

Discharge Current (Imax)

ratings of 50 kA and 75 kA.

rated SPDs

■ More ﬂexibilities/options for

designing an isolated remote

indication/monitoring circuit

Agency Approvals

■ Mechanically triggered AC

and DC rated micro-switch

with Normally Open or

Normally Closed options

for remote indication and/or

monitoring circuit

■ Clear indication for technician/

engineer to replace EOL

product to continue surge

protection for the end product

Agency

Standard

Agency File Number

UL1449

E320116

■ Environment-friendly

Typical Circuit Diagram with Normally Open Switch

■ Visual tab option to display

LST working status

■ Facilitate meeting UL 1449

or CSA C22.2 No. 269.1 and

269.2 forType 1 orType 2

SPDs

Primary Side

Secondary Side

Contact Lead

■ RoHS compliant, Lead-free,

and Halogen-free

Thermal

Disconnector

■ UL Recognized to UL 1449

and CSA C22.2 No. 269.4

as aType 1 Component

Assembly (Type 1CA)

C (Common)

Power

Source

NO (Normally Open)

To Protected Device

Metal Oxide Varistor

(MOV)

Thermal

Connection Isolation

MOV Lead

Galvanic Isolation

Applications

■ Type 1 andType 2 Surge Protective Devices (SPDs)

Note: This typical circuit shows how the switch pins (C and NO) can be used to indicate the connection status

of thermal disconnector for remote indication. This denotes that the circuit will be no longer protected from

surge currents by the MOV after the thermal disconnector forms open circuit.

GeneralTechnical Speciﬁcation

Standard

Units

Climatic Category

Operating Temperature

Storage Temperature

Voltage Proof

IEC 60068-1

IEC 61051-1

40/85/56

-40° C ~ +85° C

≥ 2.5 kVRMS

≥ 100 MΩ

IEC 61051-1

Insulation Resistance

Speciﬁcations are subject to change without notice.

Revised: GD. 08/11/23

12 3 4

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