PTCTT Series

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Vishay BCcomponents

Revision:03-Mar-14

1

Document Number: 29088

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

TWIN Vertical SMD PTC Thermistors

For Telecom Overload Protection

DESCRIPTION

The component consists of two high performance PTC

ceramics mounted together on an alumina spacer cover and

with 4 lead (Pb)-free tin plated contacts. The terminations

are joined to the Ag plated ceramics by a high melting

solder.

MARKING

• All TWIN Vertical SMD PTC’s are marked with the last

3-digits of the type number (BCxxx) and a date code

(YYWW)

FEATURES

• Very small footprint, allowing to increase the

number of lines per PCB

• Matched pairs in one component, significantly

reducing the assembly time

• Narrow tracking between the 2 PTC’s over a wide

temperature range (matching at 85 °C:

 2 x matching at

25 °C)

• Limited height and weight, used on high speed pick-and-

place circuit assembly

• Flat pick-up ceramic area for easy placement

• Small ceramics for faster response time

• Thermal coupled PTC’s for enhanced protection

• Small and large pitch available

• Compliant with the enhanced level requirements of

ITU - K20-21-45 edition 2003

• Suitable for lead (Pb)-bearing and lead (Pb)-free reflow

soldering

• Material categorization: For definitions of compliance

APPLICATIONS

Over-temperature/over-load protection:

• Telecom

- Telecommunications infrastructure

- PABX

- Set-top Box (S.B.)

MOUNTING

A flat pick-up area of 30 mm2 and low weight allows for fast

placement. No excessive solder paste should be used as no

solder or flux can reach the ceramic body during reflow

soldering. Not suitable for bismuth containing solder.

Typical soldering

235 °C, duration: 5 s (Lead (Pb)-bearing)

245 °C, duration: 5 s (Lead (Pb)-free)

Resistance to soldering heat

260 °C, duration: 10 s max.

Note

• All data is measured at 25 °C unless otherwise specified

QUICK REFERENCE DATA

PARAMETER

VALUE

UNIT

Resistance value at 25 °C

10 to 50



Switching temperature

105 to 130

°C

Maximum voltage (RMS)

240

Maximum overload current

2.5 to 8.0

A

Operating temperature range

-40 to 85

°C

Maximum trip time at 1 A

1.2 to 4.0

s

Weight

~ 1.3

g

ELECTRICAL DATA

± 20 %

(

)

MATCHING

(



(mA)

MAX.

TRIP-TIME

at 1 A

(s)

at

(A)

(2 PIECES POWERED)

(mA)

25 °C

(mA)

70 °C

(mA)

85 °C

(mA)

10

0.5

240

140

85

55

300

4.0

4.0

12.0

20

0.5

240

90

60

40

200

2.0

8.0

12.0

25

0.5

240

100

60

40

200

2.0

4.0

12.0

35

1.0

240

100

60

40

200

1.5

4.0

12.0

50

1.0

240

90

50

35

190

1.2

2.5

12.0