LVR005NK datasheet, PDF - EEWORLD Datasheet

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LVR005NK: DescriptionPolySwitch Resettable Devices Line-Voltage-Rated Devices; Categoryunclassified; File Size211KB，10 Pages; ManufacturerMACOM; Websitehttp://www.macom.com

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PolySwitch Resettable Devices Line-Voltage-Rated Devices

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PolySwitch Resettable Devices

– Line-Voltage-Rated Devices

PolySwitch Resettable Devices

Line-Voltage-Rated Devices

PolySwitch LVR devices help protect electric motors and

transformers used in commercial and home appliances

from damage caused by mechanical overloads,

overheating, stall, lost neutral and other potentially

harmful conditions.

The LVR line voltage product line of polymeric positive

temperature coefficient (PPTC) devices includes

components that are rated for line voltages of 120V

and 240V

, for up to 2A of operating current at 20°C.

They help protect against damage caused by both

overcurrent surges and overtemperature faults, offer low

resistance, and are compatibly sized with fuse solutions.

Unlike traditional fuses, PolySwitch devices do not

require replacement after a fault event. After power has

been removed and the overcurrent condition eliminated,

the circuit is restored to normal operating condition.

Compared to bimetal breakers, they offer greater

flexibility, longer lifespan, and lower electromagnetic

interference (EMI).

The PolySwitch LVR devices’ resettable functionality and latching attributes make them a reliable, cost-effective

circuit protection solution for both intermittent- and continuous-operation motor applications. Their low resistance,

fast time-to-trip, and low profile help circuit designers provide a safe and dependable product, comply with

regulatory agency requirements, and reduce warranty repair costs.

LVR/LVRL series are for line voltage applications up to a continuous operating voltage of 240V

/120V

RoHS versions of all products are available.

Benefits

• Many product choices give engineers more design

flexibility

• Compatible with high-volume electronics assembly

• Assist in meeting regulatory requirements

• Higher voltage ratings allow use in new applications

Features

• Broadest range of radial-leaded resettable devices

available in the industry

• Current ratings from 50mA to 2A

• Line voltage rating of 120V

and 240V

• Agency recognition : UL, CSA, TÜV

• Fast time-to-trip

• Low resistance

Applications

• Electromagnetic loads

• Game machines

• Industrial controls

• Lighting ballast

• Loudspeakers

• Medical equipment

• Motors, fans and blowers

• POS equipment

• Satellite video receivers

• Security and fire alarm systems

• Test and measurement equipment

• Transformers

• USB hubs, ports and peripherals

175

Warning : Application Limitations for the LVR Product Line

1) Users should independently evaluate the suitability of and test each product selected for their own application.

2) This product should not be used in an application where the maximum interrupt voltage or maximum interrupt current can be exceeded

in a fault condition. Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing

and flame.

3) A PPTC device is not a fuse - it is a nonlinear thermistor that limits current. Under a fault condition all PPTC devices go into a high resistance

state but do not open circuit, so hazardous voltage may be present at PPTC locations.

4) The devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should

not be used when repeated fault conditions or prolonged trip events are anticipated.

5) In most applications power must be removed and the fault condition cleared in order to reset a PPTC device; however under certain

unusual conditions, a PPTC device may automatically reset. PPTC devices should not be used in an application where an automatic reset

could create a safety hazard, such as garbage disposals and blenders. Appropriate qualification testing should be performed.

6) It is the responsibility of the user to determine the need for back up or failsafe protection to prevent damage that may occur in the event

of abnormal function or failure of the PPTC device.

7) Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of a PPTC device. This product should

not be used in an application where the maximum interrupt voltage or maximum interrupt current can be exceeded by inductive spikes.

8) Devices are not recommended for reflow soldering.

9) Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal,

or mechanical procedures for electronic components.

10) PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited,

for example in rigid potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion.

11) Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance

of the devices.

Figure L2-L5 Dimension Figures for LVR Devices

Figure L2

Figure L3

L L

Figure L4

Figure L5

L L

178

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