Overview
The SMTPA270 is a part of the Trisil series designed by STMicroelectronics to protect telecommunication equipment against lightning and transient surges induced by AC power lines. These components are available in SMA, SMB, and DO-15 packages, ensuring versatility in various applications. The Trisil series is known for its robust protection capabilities, fail-safe mode in short circuit conditions, and compliance with several industry standards such as UL1950, IEC950 / CSA C22.2, UL1459, and FCC part 68.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | SMTPA270 | |
| Package | SMB | |
| VRM (V) (max) | 243 | V |
| Directionality | Bi-Directional | |
| Repetitive Peak Pulse Current (IPP) | 50 A (10/1000 μs) | A |
| Holding Current (IH) | 150 mA min | mA |
| Leakage Current (IR) | 2 μA max | μA |
| Capacitance | 12 pF to 20 pF @ 50 V | pF |
| Operating Temperature Range | -55 to 150 °C | °C |
| Maximum Junction Temperature | 150 °C | °C |
Key Features
- Bidirectional crowbar protection
- Low capacitance from 12 pF to 20 pF @ 50 V
- Low leakage current: IR = 2 μA max
- Holding current: IH = 150 mA min
- Repetitive peak pulse current: IPP = 50 A (10/1000 μs)
- Fail-safe mode in short circuit for better protection
- Compliance with industry standards such as UL1950, IEC950 / CSA C22.2, UL1459, and FCC part 68
Applications
- Telecommunication equipment such as analog and digital line cards (xDSL, T1/E1, ISDN, ...)
- Terminals (phone, fax, modem, ...) and central office equipment
Q & A
- What is the primary function of the SMTPA270? The primary function of the SMTPA270 is to protect telecommunication equipment against lightning and transient surges induced by AC power lines.
- In which packages is the SMTPA270 available? The SMTPA270 is available in SMA, SMB, and DO-15 packages.
- What is the maximum repetitive peak pulse current of the SMTPA270? The maximum repetitive peak pulse current is 50 A (10/1000 μs).
- What is the holding current of the SMTPA270? The holding current is 150 mA min.
- What is the leakage current of the SMTPA270? The leakage current is 2 μA max.
- Is the SMTPA270 compliant with industry standards? Yes, it is compliant with standards such as UL1950, IEC950 / CSA C22.2, UL1459, and FCC part 68.
- What is the operating temperature range of the SMTPA270? The operating temperature range is -55 to 150 °C.
- What is the maximum junction temperature of the SMTPA270? The maximum junction temperature is 150 °C.
- Does the SMTPA270 have a fail-safe mode? Yes, it has a fail-safe mode in short circuit conditions for better protection.
- What types of telecommunication equipment can the SMTPA270 protect? It can protect analog and digital line cards, terminals, and central office equipment.
