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PolySwitch LVR Series Resettable Protection Devices
LVR Line Voltage Series of PolySwitch devices for overcurrent and overtemperature protection for 100VAC - 240VAC applications
Raychem Circuit Protection, a unit of Tyco Electronics Corporation, introduces the LVR series of PolySwitch® resettable devices. Designed for use in line voltage applications, the LVR series PPTC (polymeric positive temperature coefficient) devices are rated at 240VAC, permitting maximum voltages of up to 265VAC, and are available in hold currents from 50 to 400mA. The LVR series extends the proven PolySwitch technology of resettable overcurrent protection into higher voltage applications. When installed in proximity to potential heat generating components such as magnetics, FETs, or power resistors, the thermally active devices can help protect against both overcurrent and overtemperature faults in power supplies, transformers and control circuits. The properties of the LVR device can offer distinct benefits in transformer protection designs. The surface temperature of the LVR device in the high resistance state is well within the range of most transformer winding insulation ratings. This low temperature operation, combined with small size, low resistance and good thermal shock tolerance, can allow the LVR device to be mounted in direct contact with the transformer windings for a faster response to potential fault conditions.
Electrical Characteristics (at 20° C)
Max. interrupt voltage (VAC) Max. interrupt current (A) Post-trip resistance standard trip () Max.
Typical power dissipation in the tripped state (W)

Benefits:
· Helps provide overcurrent and overtemperature protection · Low surface temperature in high resistance state helps provide an effective solution for protection of transformer windings · Helps reduce warranty, service and repair costs · Assists in meeting regulatory requirements · Compatible with high-volume electronics assembly

Features:
Maximum operating voltage of 240VAC Maximum interrupt voltage of 265VAC Hold currents from 50mA ­ 400mA Agency: UL and TЬV (IEC) recognized, CSA pending · Solid-state--able to withstand mechanical shock and thermal stress · Low off state resistance · · · ·

Target Applications:
· Cell phone chargers · Appliance (range, washing machine, HVAC) control boards · Cordless phone and answering machine power supplies · Metering, industrial control boards · Switching power supplies · Transformers · Lighting dimmers, ballasts

Part number

Hold currrent (A)

Voltage rating (VAC)

Current ratings (A) Hold Trip

Max. time-to-trip Current T-t-T (A) (s)

Resistance () Min. Max.

LVR005 LVR008 LVR012 LVR016 LVR025 LVR040

0.05 0.08 0.12 0.16 0.25 0.40

240 240 240 240 240 240

265 265 265 265 265 265

1.0 1.2 1.2 2.0 3.5 5.5

0.05 0.08 0.12 0.16 0.25 0.40

0.12 0.19 0.30 0.37 0.56 0.90

0.25 0.40 0.60 0.80 1.25 2.00

15.0 15.0 15.0 15.0 18.5 26.0

18.5 7.4 3.0 2.5 1.3 0.6

31.00 12.00 6.50 4.10 2.10 0.97

65.0 26.0 12.0 7.8 3.8 1.9

0.7 0.8 1.0 1.4 1.5 2.0

Product Notes: 1. A PTC device is not a fuse--it is a nonlinear thermistor that limits current. Because under a fault condition all PTC devices go into a high resistance state but not open circuit, hazardous voltage may be present at PTC locations. 2. The devices are intended for protection against occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated. 3. Please refer to the SCD for complete information and applications limitations, which can be obtained from product management (650-361-6900) or the web: www.circuitprotection.com/lvr/

LVR Devices
Figure A Figure B Figure C Figure D

Dimensions in millimeters (inches)
Part number A Fig. Min. Max. Min. B Max. Min. C Max. Min. D Max. Min. E Max.

LVR005S LVR005K LVR008S LVR008K LVR012S LVR012K LVR016S LVR016K LVR025S LVR025K LVR040S LVR040K

A C A C A C A C B D B D

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8.3 (0.33) 8.3 (0.33) 8.3 (0.33) 8.3 (0.33) 8.3 (0.33) 8.3 (0.33) 9.9 (0.39) 9.9 (0.39) 9.6 (0.38) 9.6 (0.38) 11.5 (0.46) 11.5 (0.46)

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10.7 (0.43) 12.9 (0.51) 10.7 (0.43) 12.9 (0.51) 10.7 (0.43) 12.9 (0.51) 12.5 (0.50) 13.8 (0.54) 17.4 (0.69) 18.8 (0.74) 19.5 (0.77) 20.9 (0.82)

4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17) 4.3 (0.17)

5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23) 5.8 (0.23)

7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30) 7.6 (0.30)

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3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15) 3.8 (0.15)

Installation Notes: LVR parts are not recommended for reflow soldering. Installation where the LVR part is constrained may inhibit proper device function. Visit our web site or contact your local representative for additional information.

Typical Time-to-Trip Characteristics
Typical Time-to-Trip of LVR Devices at 20°C

Thermal Derating Curve
Typical Thermal Derating for LVR Devices

A = LVR005 B = LVR008 C = LVR012 D = LVR016 E = LVR025 F = LVR040

Percent of Rated Current

Time-to-Trip (sec)

Fault Current (A)

Temperature (°C)

Worldwide Headquarters
308 Constitution Drive, MS R21/2A Menlo Park, CA USA 94025-1164 Tel (800) 227-7040 (650) 361-6900 Fax (650) 361-2508

Japan Tel 81-44-900-5110 Fax 81-44-900-5140 Asia Pacific Tel 852-2738-3401 Fax 852-2735-1185

Europe Tel 32/16351714 Fax 32/16351727
www.circuitprotection.com/lvr/ www.circuitprotection.com.hk (Chinese) www.raychem.co.jp/polyswitch (Japanese)

PolySwitch, SiBar, miniSMD, and nanoSMD are trademarks of Tyco Electronics Corporation. All information, including illustrations, is believed to be reliable. Users, however, should independently evaluate the suitability of each product for their application. Tyco Electronics makes no warranties as to the accuracy or completeness of the information, and disclaims any liability regarding its use. Tyco Electronics' only obligations are those in the Company's Standard Terms and Conditions of Sale for this product, and in no case will Tyco Electronics be liable for any incidental, indirect, or consequential damages arising from the sale, resale, use, or misuse of the product. Specifications are subject to change without notice. In addition, Tyco Electronics reserves the right to make changes-without notification to Buyer-to materials or processing that do not affect compliance with any applicable specification.

©2003 Tyco Electronics Corporation. Printed in USA. RCP0045.0403.1000




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