K81A245 Datasheet, PDF (1/2 Pages) Tyco Electronics – 2Pro Devices Help Provide Reliable Connectivity

2Pro Devices Help
Provide Reliable Connectivity
Raychem Circuit Protection, the leader in innovative circuit protection solutions, has
introduced the industry’s first integrated overcurrent/overvoltage protection solu-
tion—the 2Pro device. The RoHS-compliant component incorporates PolySwitch
PPTC (Polymeric Positive Temperature Coefficient) and metal oxide varistor technol-
ogy in a single device to reduce board space requirements and component count.
Damage to telephony communications equipment can be caused by various
sources including lightning and ESD surges, power contact and induction with AC
lines. The 2Pro TM2P-10271 and TM2P-10271E devices help provide current limit-
ing during overcurrent events, and voltage clamping during overvoltage events.
After a fault condition is removed and power is cycled, 2Pro devices will reset so
that communications equipment remains operational.
With the introduction of the 2Pro devices Raychem Circuit Protection addresses the need for resettable circuit protection
devices for use in cost-sensitive PSTN (Public Switched Telephone Network) and VoIP (Voice over Internet Protocol) telepho-
ny equipment. The widespread use of VoIP gateways in homes and enterprise environments as the primary means of voice
delivery requires the utmost safety and reliability in equipment. 2Pro circuit protection devices are designed specifically to
help manufacturers comply with global safety standards, including UL 60950, TIA-968-A, IEC 60950, and ITU-T K.20/K.21. The
UL 497A listed protector also helps provide ESD protection.
Benefits:
• Single device helps reduce component
count and footprint
• Helps reduce warranty returns
• Helps equipment comply with surge
tests per: TIA-968-A, IEC 60950,
ITU-T K.20/K.21
• Helps simplify UL 60950 testing
• Helps equipment comply with UL 60950
Features:
• Single overcurrent, overvoltage
and ESD protection device
• Resettable overcurrent protection
• UL 497A listed protector
(#E258475)
• RoHS compliant
Applications:
• Cordless telephones
• VoIP gateways
• Fax machines
• Data modems
• Set-top boxes
• Security systems
• MDF modules
• Analog and ISDN linecards
TM2P Electrical Characteristics
Overcurrent (terminals 1 – 2)—Performance ratings @ 20°C
Part Number
IHOLD
(A)
ITRIP
(A)
Resistance†
(Ω)
R min. R max. R1 max*
TM2P-10271
0.15
0.30
7.0
14.0 16.0
TM2P-10271E‡
0.15
0.30
6.0
12.0 14.0
Time to Trip (s)†
@ 1A
Typ
Max
0.3
3
0.4
4
Electrical Schematic
(1)
(2)
Overvoltage (terminals 2 – 3)
Part Number
TM2P-10271
TM2P-10271E‡
Varistor Voltage
V @ 1 mA
DC (V) Tolerance
270
± 10%
270
± 10%
DC Resistance
@ 100 V
(MΩ)
>10
>10
* Maximum device resistance at 20°C measured 1 hour post trip.
† Corresponds to operation below varistor voltages.
‡ Data is preliminary.
(3)
Maximum Clamping
Voltage @ 25 A
(V)
Rated
Wattage
(W)
455
0.25
455
0.25
www.circuitprotection.com