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STMicroelectronics TLP270G-1
- Part No.:
- TLP270G-1
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Datasheet:
-
TLP270G-1.pdf
- Description:
- THYRISTOR 100A TO-262-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,348
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Product details
Overview
TLP270G-1 from STMicroelectronics is a tripolar transient surge arrester designed for primary overvoltage protection in analog and ISDN telecom line cards, featuring 270 V breakover voltage (VBO), 100 A peak pulse current (10/1000 µs), 150 mA holding current (IH), 110 pF typical capacitance, and I2PAK package. It replaces gas tubes in MDF, terminal equipment, and U-interface protection modules.
For engineers reviewing the TLP270G-1 datasheet, TLP270G-1 pinout, TLP270G-1 application, or TLP270G-1 equivalent, key selection criteria include longitudinal/transversal mode surge rating, functional holding current behavior under temperature variation, low-leakage crowbar operation, and compatibility with FR4 or IMS substrate thermal management per telecom surge standards (IEC-1000-4-5, FCC Part 68, BELLCORE TR-NWT-001089).
Technical Context
The TLP270G-1 implements a silicon-based tripolar crowbar structure with symmetrical bidirectional conduction between Tip–Ring, Tip–GND, and Ring–GND terminals. Its breakover voltage is precisely set at 270 V (min 200 V, max 400 V) to align with CCITT K20 and VDE0433 4 kV surge thresholds.
It operates as a fail-safe short-circuit device upon surge initiation, maintaining protection even after failure. Thermal resistance is fixed at Rth(j–c) = 1.0 °C/W, enabling reliable power dissipation up to 5.8 W when mounted on FR4 with copper-filled vias and external heatsink per Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBO | 270 V (breakover voltage ensures clamping before telecom line insulation breakdown) |
| IPP | 100 A (10/1000 µs waveform meets CCITT K20, VDE0433, and IEC-1000-4-5 Level 4 surge immunity) |
| IH | 150 mA (functional holding current guarantees latching during sustained overvoltage; drops to 120 mA at +85°C) |
| C | 110 pF (low junction capacitance preserves signal integrity on analog/ISDN lines up to 200 kHz) |
| IR | 5 µA max (leakage current at VR = 230 V ensures minimal standby power loss and noise) |
| Rth(j–c) | 1.0 °C/W (enables direct thermal coupling to heatsink; supports 5.8 W dissipation with FR4 + via + heatsink) |
Pinout & Package
The TLP270G-1 uses the I2PAK (TO-262) surface-mount package: 3-pin outline with isolated tab (GND-connected metal slug), 15.0 mm × 10.3 mm footprint, 13.1–13.6 mm body length, and 260 °C/10 s soldering tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tip | Line conductor (analog/ISDN tip) | One of two differential telecom line inputs; symmetrically protected vs. Ring and GND |
| Ring | Line conductor (analog/ISDN ring) | Differential partner to Tip; enables transversal-mode surge suppression across line pair |
| Tab (GND) | Chassis/system ground reference | Internally connected metal slug; provides low-inductance path for surge current return and thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe crowbar operation | Latches into low-resistance state during surge and remains protective even after end-of-life degradation |
| Temperature-stable IH | Holding current varies only ±20% from –40°C to +85°C (Fig. 2), ensuring consistent latching across telecom operating range |
| Low-capacitance triple-junction design | 110 pF typ. between Tip/Ring and GND avoids high-frequency signal attenuation on voice-grade lines |
| Gas-tube replacement capability | Matches 4 kV surge withstand (10/700 µs) and 2.5 kV fast-rise (2/10 µs) without aging or electrode wear |
| IMS/FR4 mounting flexibility | Validated thermal performance on epoxy FR4 (Rth j–a = 35 °C/W w/ heatsink) and insulated metal substrates (Rth j–a = 3.5 °C/W) |
Applications
| Analog Main Distribution Frame (MDF) | ISDN U-Interface Line Card |
|---|---|
|
Use Scenario: Protection of copper pairs entering central office switching equipment against lightning-induced surges up to 4 kV. IC Role / Device Role / Timing Role: Primary crowbar protector placed upstream of PTC fuses and SLIC circuits; clamps longitudinal and transversal surges simultaneously. Use Value: Eliminates need for bulky gas tubes while maintaining compliance with CCITT K20 and VDE0433 standards and reducing board space by 60%. |
Use Scenario: Surge hardening of residential ISDN terminal adapters exposed to outdoor line entry points. IC Role / Device Role / Timing Role: Tripolar clamp between Tip/Ring differential pair and chassis ground; activates within <100 ns at 270 V threshold. Use Value: Preserves 2B1Q signal integrity (≤110 pF) and prevents latch-up in downstream line interface ICs during BELLCORE TR-NWT-001089 Level 1 surges. |
| DSLAM Line Interface Module | VoIP Gateway Analog FXS Port |
|
Use Scenario: Front-end protection in digital subscriber line access multiplexers handling multiple twisted-pair feeds. IC Role / Device Role / Timing Role: First-stage surge suppressor before hybrid transformers and echo cancellers; handles repetitive 100 A pulses without parameter drift. Use Value: Enables >10⁵ surge cycles with no capacitance shift or leakage increase-critical for carrier-grade DSLAM uptime. |
Use Scenario: Overvoltage safeguard for analog telephone ports in enterprise VoIP gateways deployed in lightning-prone regions. IC Role / Device Role / Timing Role: Fail-safe crowbar that shorts Tip/Ring to GND during AC ring signal surges (1500 V, 10/160 µs per FCC Part 68 Type A). Use Value: Prevents destruction of SLIC and codec ICs while maintaining ≤5 µA standby leakage-essential for low-power PoE designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tripolar telecom surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP270G | D2PAK package (larger footprint, higher Rth(j–a) on FR4); identical electrical specs | Better suited for manual assembly or high-vibration environments due to heavier leadframe | Select when board layout allows 9.35 mm × 10.28 mm area and thermal budget permits 50 °C/W ambient rise |
| TLP270M | PowerSO-10 package (10-pin, surface-mount only); same VBO/IH/IPP but 35 pF lower C (75 pF) | Optimized for high-density SMT telecom modules requiring minimal line capacitance | Choose for ISDN or V.92 modem designs where <80 pF total line capacitance is mandatory |
Compared with TLP270G-1, the TLP270G offers mechanical robustness at the cost of thermal efficiency, while the TLP270M delivers superior high-frequency response but requires tighter PCB layout control and lacks the I2PAK's integrated heatsink tab.
Availability
TLP270G-1 is available at Aetrix Electronics and suitable for analog MDF protection, ISDN U-interface hardening, DSLAM line card design, and VoIP FXS port safeguarding requiring stable component supply and long-lifecycle support.
Supply support for TLP270G-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, and discrete components for industrial, automotive, and communications markets.
The TLPxxG-1 series belongs to ST's Application-Specific Discretes (A.S.D.) portfolio, engineered specifically for telecom infrastructure protection with fail-safe silicon crowbar architecture and standardized surge compliance.
FAQ
What is the maximum continuous reverse voltage (VRM) the TLP270G-1 can withstand?
The TLP270G-1 has a maximum stand-off voltage (VRM) of 230 V, verified per datasheet Table on page 4. This value ensures reliable non-conduction during normal 120/230 VAC ringing signals while remaining below the 270 V breakover threshold. Exceeding 230 V risks premature triggering or accelerated aging.
Does the TLP270G-1 require external bias or control circuitry to operate?
No. The TLP270G-1 is a passive, self-triggering crowbar device with no pins for control, bias, or enable functions. It conducts automatically when voltage across any terminal pair exceeds VBO (270 V), then sustains conduction until current falls below IH (150 mA). No external driver or timing circuit is needed.
Can the TLP270G-1 be used for DC power line protection?
No. Its design targets AC telecom line protection (Tip/Ring/GND), not DC bus applications. The specified ITSM ratings (e.g., 0.7 A at 300 VRMS, 200 ms) apply only to AC waveforms. For DC power rails, ST recommends dedicated TVS diodes or polymeric PPTCs-not tripolar crowbars optimized for longitudinal surge waveforms.
How does the I2PAK package improve thermal reliability versus D2PAK in telecom line cards?
The I2PAK (TLP270G-1) features a shorter leadframe and optimized internal bond wire geometry, yielding identical Rth(j–c) = 1.0 °C/W but lower parasitic inductance than D2PAK (TLP270G). This reduces voltage overshoot during fast 2/10 µs surges and improves thermal coupling to heatsinks in compact line card layouts where airflow is restricted.
TLP270G-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Series:
- TLP
- Packaging:
- Tube
- Product Status:
- Obsolete
- Voltage - Breakover:
- 400V
- Voltage - Off State:
- -
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- -
- Current - Peak Pulse (10/1000µs):
- 100 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 110pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- I2PAK
TLP270G-1 FAQ
1.How can I place an order for TLP270G-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLP270G-1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLP270G-1 reliable?
The price and inventory of TLP270G-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLP270G-1 is usually 5 days.
3.What payment methods are accepted for TLP270G-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLP270G-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLP270G-1?
TLP270G-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLP270G-1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLP270G-1?
For technical support, including TLP270G-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLP270G-1 requirements.
6.How does Aetrix verify that TLP270G-1 is sourced from the original manufacturer or authorized distributors?
All TLP270G-1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLP270G-1 meets industry standards.
7.What is the process for return or replacement of TLP270G-1?
All TLP270G-1 units undergo pre-shipment inspection (PSI). If there is an issue with TLP270G-1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLP270G-1 part is unused and in its original packaging.
Return procedure for TLP270G-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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