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STMicroelectronics TPI12011N
- Part No.:
- TPI12011N
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPI12011N.pdf
- Description:
- THYRISTOR 30A 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
TPI12011N from STMicroelectronics is a bidirectional triple crowbar protection device for ISDN U-interface and S-interface telecom line protection, featuring 120 V breakdown voltage (VBR), 170 V dynamic breakover voltage (VBO dyn.), 30 A peak pulse current (10/1000 µs), and low capacitance (≤45 pF) optimized for high-speed data integrity.
For engineers reviewing the TPI12011N datasheet, TPI12011N pinout, TPI12011N application, or TPI12011N equivalent, key selection criteria include common/differential-mode surge symmetry, longitudinal capacitance balance, 4-point bonding architecture for fast transient suppression, and SO-8 package compatibility with telecom PCB layouts.
Technical Context
The TPI12011N implements a symmetrical tripolar crowbar structure using integrated Trisil™ technology, delivering identical 120 V breakdown in both positive and negative polarities across differential (Tip–Ring) and common (Tip–GND / Ring–GND) modes. Its "4-point" internal wire bonding eliminates L·di/dt overvoltage spikes during sub-microsecond transients.
It operates as a voltage-triggered thyristor-based protector with 150 mA holding current (IH) and 800 mA breakover current (IBO), maintaining stable clamping without external bias while supporting CCITT K17/K20, VDE 0433, VDE 0878, and IEC 61000-4-2 Level 4 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR | 120 V - guaranteed minimum breakdown voltage ensures reliable triggering before line damage in ISDN interfaces |
| VBO dyn. | 170 V - dynamic breakover voltage under 10/1000 µs surge defines actual clamping level during fast transients |
| IPP | 30 A (10/1000 µs) - peak surge current rating determines survivability against long-duration lightning-induced surges |
| C (max) | 45 pF - maximum line-to-ground capacitance preserves signal integrity up to 160 kbps ISDN B-channel rates |
| IH | 150 mA - holding current ensures automatic latching during overvoltage and clean recovery post-surge |
| CA – CB | ≤30 pF - capacitance imbalance tolerance maintains longitudinal balance critical for echo cancellation |
| Rth(j-a) | 170 °C/W - junction-to-ambient thermal resistance limits self-heating during repeated surge events |
Pinout & Package
Supplied in SO-8 package (JEDEC MS-012AC, 5.0 × 6.2 mm footprint), with exposed pad not electrically connected; RoHS-compliant, lead-free second-level interconnect per ECOPACK® standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tip) | Line A input | Connects to ISDN Tip line; forms one crowbar path with Pins 2/3/6/7 (GND) |
| 2 (GND) | Ground reference | Common ground terminal for all three crowbar paths; must be low-inductance connection |
| 3 (GND) | Ground reference | Dual GND pin enhances current sharing and reduces bondwire inductance in 4-point configuration |
| 4 (Ring) | Line B input | Connects to ISDN Ring line; symmetric crowbar path with Pin 1 and shared GND pins |
| 5 (GND) | Ground reference | Third dedicated GND pin improves thermal dissipation and surge current distribution |
| 6 (GND) | Ground reference | Fourth GND pin completes 4-point bonding architecture for minimized L·di/dt overshoot |
| 7 (GND) | Ground reference | Ensures uniform current division across all crowbar junctions during simultaneous Tip/Ring surges |
| 8 (Ring) | Line B input | Redundant Ring connection supports balanced routing and differential mode surge equalization |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional triple crowbar topology | Enables simultaneous protection of Tip, Ring, and GND in both polarities without polarity-sensitive installation |
| 4-point internal bonding | Eliminates parasitic inductance-induced overshoot during <100 ns transients, critical for CCITT K20 compliance |
| Capacitance balance (CA–CB ≤30 pF) | Maintains longitudinal balance to prevent echo and crosstalk degradation in full-duplex ISDN operation |
| Fixed VBR in common & differential modes | Guarantees identical 120 V trigger threshold whether surge appears Tip–GND, Ring–GND, or Tip–Ring |
| Low dynamic impedance post-trigger | Clamps residual voltage to <10 V at 30 A, limiting energy dissipation in downstream line interface ICs |
Applications
| ISDN U-Interface Protection | ISDN S/T-Interface Protection |
|---|---|
Use Scenario: Protecting central office line cards against lightning-induced surges on two-wire subscriber loops. IC Role / Device Role / Timing Role: Primary crowbar protector placed between line transformer secondary and SLIC (Subscriber Line Interface Circuit). Use Value: Withstands 30 A 10/1000 µs surges while maintaining ≤45 pF capacitance to preserve 160 kbps B-channel timing margins. | Use Scenario: Safeguarding NT1 (Network Termination Type 1) devices from induced transients on S/T bus wiring. IC Role / Device Role / Timing Role: Bidirectional line protector mounted directly at S/T connector, preceding transceiver ICs. Use Value: Symmetrical 120 V VBR ensures equal protection for both Tip and Ring lines, preventing differential-mode latch-up in transceivers. |
| DSL Line Card Protection | VoIP Gateway Analog FXS Port |
Use Scenario: Front-end surge suppression in ADSL/VDSL line cards where high-frequency signal integrity is critical. IC Role / Device Role / Timing Role: First-stage protector before hybrid transformer and line driver amplifier. Use Value: ≤30 pF capacitance imbalance prevents return loss degradation above 1 MHz, meeting ITU-T G.992.x spectral mask requirements. | Use Scenario: Protecting analog telephone ports in enterprise VoIP gateways exposed to building-wide surge coupling. IC Role / Device Role / Timing Role: Standalone crowbar replacing discrete MOV+TVS stacks for reduced board area and improved consistency. Use Value: 150 mA IH ensures reliable latching during 1.5 kV/10/700 µs CCITT K20 surges, then clean recovery without manual reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tripolar telecom line protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPI8011N | Lower 80 V VBR and 120 V VBO dyn.; same SO-8 pinout and 4-point bonding | Suitable for 100 V nominal systems (e.g., legacy POTS); insufficient margin for 120 V ISDN ring signals | Select when system operating voltage is ≤90 V and lower clamping voltage is required |
| PESD5V0S1BA | Unidirectional ESD array (5 V clamp), 0.5 pF typical capacitance, no crowbar latching behavior | Only for board-level ESD (IEC 61000-4-2), not for lightning surge (IEC 61000-4-5) or CCITT K-series | Use only as secondary protection after TPI12011N; never as standalone primary surge protector |
Compared with TPI8011N, TPI12011N provides higher voltage margin for modern ISDN deployments, while PESD5V0S1BA serves a fundamentally different ESD-only role and cannot replace its crowbar functionality or surge current handling.
Availability
TPI12011N is available at Aetrix Electronics and suitable for ISDN infrastructure, DSL line cards, VoIP gateway analog ports, and telecom equipment requiring stable component supply with long lifecycle support.
Supply support for TPI12011N 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, microcontroller, and automotive-grade ICs for industrial, consumer, and communications markets.
The TPI series belongs to ST's dedicated telecom protection product line, engineered specifically for symmetrical, high-reliability surge suppression in ISDN, DSL, and analog telephony interfaces with strict longitudinal balance and fast transient immunity requirements.
FAQ
What is the maximum allowable continuous operating voltage for TPI12011N?
The TPI12011N has a stand-off voltage (VRM) of 105 V, meaning it remains non-conductive up to this DC or RMS AC voltage. Exceeding 105 V risks premature triggering; it is rated for 120 V breakdown (VBR) but must operate below VRM in normal service to ensure reliability and longevity.
Can TPI12011N be used in unidirectional applications?
Yes - although inherently bidirectional, the TPI12011N functions correctly in unidirectional configurations (e.g., protecting only Tip-to-GND) by leveraging its symmetrical structure. However, its full benefit - including differential-mode surge suppression and capacitance balance - is realized only in dual-line (Tip + Ring) installations per Figure 7 and Figure 8.
How does the "4-point" bonding improve surge performance?
The 4-point bonding connects Tip and Ring lines through separate low-inductance paths to four dedicated GND pins (Pins 2, 3, 6, 7), minimizing L·di/dt voltage overshoot during rapid transients. This architecture ensures clamping occurs at the specified VBO dyn. (170 V) without spiking, meeting stringent CCITT K20 5/310 µs requirements.
Is TPI12011N compliant with RoHS and REACH regulations?
Yes - TPI12011N is manufactured in ST's ECOPACK®-compliant SO-8 package with lead-free second-level interconnects, fully conforming to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The inner box label and package marking indicate compliance per JEDEC JESD97.
TPI12011N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TPI
- Packaging:
- Tube
- Product Status:
- Obsolete
- Voltage - Breakover:
- 160V
- Voltage - Off State:
- -
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- -
- Current - Peak Pulse (10/1000µs):
- 30 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPI12011N FAQ
1.How can I place an order for TPI12011N through Aetrix?
Please submit a Request for Quotation (RFQ) for TPI12011N 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 TPI12011N reliable?
The price and inventory of TPI12011N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPI12011N is usually 5 days.
3.What payment methods are accepted for TPI12011N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPI12011N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPI12011N?
TPI12011N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPI12011N 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 TPI12011N?
For technical support, including TPI12011N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPI12011N requirements.
6.How does Aetrix verify that TPI12011N is sourced from the original manufacturer or authorized distributors?
All TPI12011N 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 TPI12011N meets industry standards.
7.What is the process for return or replacement of TPI12011N?
All TPI12011N units undergo pre-shipment inspection (PSI). If there is an issue with TPI12011N, 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 TPI12011N part is unused and in its original packaging.
Return procedure for TPI12011N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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