PTC307C Series

www.vishay.com

Vishay Cera-Mite

Revision: 11-Aug-10

1

Document Number: 22998

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

PTC Thermistors Motor Start Pellets

FEATURES

• Rugged silver electrodes well suited for long life

OEM pressure contact mounting

• Various pellet sizes for optimum inrush current

and switching time

• Withstanding voltage is 2 times the maximum voltage

rating

• UL approved pellets

• Material categorization: For definitions of compliance

APPLICATIONS

• Single Phase motorstart assist in

• Refrigerator systems

• Airconditioning systems

• Heat-pumps

• Small compressors

• Inrush current generation

DESCRIPTION

These

directly

heated

thermistors

have

a

positive

temperature coefficient and are primarily intended for inrush

current generation. They consist of a high grade ceramic

disk with two rugged pattern silver electrodes for contact

pressure mounting. These ceramic pellets can be build into

proprietary motor start devices for compressor, refrigerator

and HVAC OEMs.

MOUNTING

The PTC thermistor pellets are suitable for pressure contact

mounting in application specific housing assemblies.

Examples of such assemblies can be found in the PTC305C

series. Assembly housing must be appropriate for usage up

to 180 °C surface temperature of the PTC pellets.

The pellets are not solderable.

MARKING

The pellets are not marked. Marking is available on request

for customized parts.

SAFETY AGENCY RECOGNITION

Vishay Cera-Mite motor start PTC pellet thermistors are

recognized by Underwriter Laboratories file E148885 in

accordance with Standard for Thermistor Type Devices

UL 1434; and Canadian Standards C22.2 No. 0-1991.

QUICK REFERENCE DATA

PARAMETER

VALUE

UNIT

Resistance value at 25 °C

3.3 to 75

Ω

Tolerance on resistance value

± 30

%

Current ratings

4 to 16

Switching times (typical)

0.25 to 1.0

s

Maximum voltage rating

160 to 450

Operating temperature range

-10 to +85

°C

Storage temperature range

-25 to +105

°C