PTCTT Datasheet, PDF (1/5 Pages) Vishay Siliconix – TWIN Vertical SMD PTC Thermistors For Telecom Overload Protection

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PTCTT Series
Vishay BCcomponents
TWIN Vertical SMD PTC Thermistors
For Telecom Overload Protection
QUICK REFERENCE DATA
PARAMETER
VALUE
Resistance value at 25 °C
10 to 50
Switching temperature
105 to 130
Maximum voltage (RMS)
240
Maximum overload current
2.5 to 8.0
Operating temperature range
at V_max.
Maximum trip time at 1 A
-40 to 85
1.2 to 4.0
Weight
~ 1.3
UNIT

°C
V_RMS
A
°C
s
g
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
please see www.vishay.com/doc?99912
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.
ELECTRICAL DATA
R₂₅
± 20 %
()
MATCHING
(
V_max.
(V_RMS)
25 °C
(mA)
I_nt at
70 °C
(mA)
85 °C
(mA)
10
0.5
240
140
85
55
20
0.5
240
90
60
40
25
0.5
240
100
60
40
35
1.0
240
100
60
40
50
1.0
240
90
50
35
Note
• All data is measured at 25 °C unless otherwise specified
I_t
(mA)
300
200
200
200
190
MAX.
TRIP-TIME
at 1 A
(s)
4.0
2.0
2.0
1.5
1.2
I_max.
at
V_max.
(A)
4.0
8.0
4.0
4.0
2.5
I_res
(2 PIECES POWERED)
at V_max.
(mA)
12.0
12.0
12.0
12.0
12.0
Revision:03-Mar-14
1
Document Number: 29088
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000