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STMicroelectronics SMP80MC-140
- Part No.:
- SMP80MC-140
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMP80MC-140.pdf
- Description:
- THYRISTOR 140V 200A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,046
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Product details
Overview
SMP80MC-140 from STMicroelectronics is a bidirectional Trisil™ transient voltage surge suppressor (TVSS) designed for primary-level overvoltage protection in telecom line interfaces. It features a 140 V stand-off voltage (VRM), 180 V dynamic breakover voltage (VBO), 80 A repetitive peak pulse current (10/1000 µs), 12 pF capacitance at 50 V, and 2 µA max leakage current - enabling low-signal-distortion protection for ADSL2+/VDSL2 equipment.
For engineers reviewing the SMP80MC-140 datasheet, SMP80MC-140 pinout, SMP80MC-140 application, or SMP80MC-140 equivalent, this device is selected for telecom surge protection where micro-capacitance, fail-safe short-circuit behavior, and compliance with GR-1089 Core, ITU-T K20/K21, and IEC 61000-4-5 are mandatory design requirements.
Technical Context
The SMP80MC-140 operates as a crowbar-type protector: it remains high-impedance below VRM (140 V), triggers rapidly at VBO (180 V), latches on via thyristor action with IH ≥ 150 mA, and clamps surges by entering low-impedance conduction until current falls below IH. Its bidirectional symmetry enables AC line protection without polarity constraints.
Thermal design relies on JEDEC DO-214AA (SMB) package with Rth(j-a) = 100 °C/W (recommended footprint) and Tj range of –40 °C to +150 °C. Fail-safe operation ensures short-circuit mode under end-of-life overstress, satisfying UL60950 and IEC 950 safety mandates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 140 V - maximum continuous operating voltage before triggering; sets protection threshold for telecom line interface. |
| Dynamic Breakover Voltage (VBO) | 180 V @ 100 V/µs - voltage at which device switches to low-impedance state during fast transients; ensures reliable triggering before equipment damage. |
| Repetitive Peak Pulse Current (IPP) | 80 A (10/1000 µs) - surge-handling capability for repeated lightning-induced surges per GR-1089 Core first-level requirements. |
| Junction Capacitance (C) | 12 pF @ 50 V - ultra-low capacitance preserves signal integrity up to 30 MHz; compatible with ADSL2+ and VDSL2 data rates. |
| Holding Current (IH) | ≥150 mA - minimum current required to sustain conduction after triggering; ensures robust latch-on during sustained overvoltage events. |
| Leakage Current (IR) | ≤2 µA @ VRM - negligible standby power loss and minimal impact on line biasing or monitoring circuits. |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with UL94 V0 epoxy, lead-free finish, and validated thermal performance. |
Pinout & Package
Package: DO-214AA (SMB), bidirectional device with no anode/cathode marking; terminals are symmetrical and interchangeable. Cathode bar marking is absent - consistent with bidirectional Trisil construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Line-side connection (AC input) | One side of bidirectional crowbar path; connects to protected telecom line (e.g., tip/ring pair). |
| Terminal 2 | Line-side connection (AC input) | Other side of bidirectional crowbar path; electrically identical to Terminal 1; no polarity dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar protection | Enables single-device protection of AC telecom lines (e.g., POTS, xDSL) without external diode bridges or polarity concerns. |
| Fail-safe short-circuit mode | Guarantees predictable end-of-life behavior - device shorts rather than opens - preserving downstream circuit isolation per UL60950. |
| Micro capacitance (12 pF) | Minimizes high-frequency insertion loss and phase distortion; supports >20 Mbps ADSL2+ transmission without equalization penalty. |
| Low VBO / VRM ratio (1.29) | Ensures tight margin between operating voltage and trigger point - reduces false triggering while maintaining fast response. |
| GR-1089 Core compliance | Validated for first-level (2500 V, 500 A, 2/10 µs) and intra-building (1500 V, 100 A, 2/10 µs) telecom surge immunity testing. |
Applications
| ADSL/VDSL Line Interface Protection | Central Office DSLAM Port Protection |
|---|---|
Use Scenario: Protecting copper twisted-pair subscriber lines from lightning-induced surges and power-cross events in residential gateways and CPE. IC Role / Device Role / Timing Role: Primary crowbar protector placed directly at line entry, upstream of transformer and line driver ICs. Use Value: 12 pF capacitance avoids signal degradation at 2.2 MHz (ADSL2+) and 17.664 MHz (VDSL2), preserving SNR and bit-loading efficiency. |
Use Scenario: Safeguarding DSLAM line cards against induced surges from outside plant wiring in telecom central offices. IC Role / Device Role / Timing Role: First-stage surge arrestor in multi-stage protection scheme, coordinated with GDT and TVS diodes. Use Value: 80 A (10/1000 µs) rating meets GR-1089 Core first-level surge requirements, enabling robust front-end hardening. |
| ISDN BRI S/T Interface Protection | VoIP Gateway FXS Port Protection |
Use Scenario: Securing ISDN Basic Rate Interface (BRI) S/T ports against longitudinal surges in business PBX and terminal adapters. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp across tip-ring pair, operating symmetrically without DC bias dependency. Use Value: Fail-safe short-circuit behavior ensures continued isolation even after multiple surge events, meeting IEC 61000-4-5 Class 4 requirements. |
Use Scenario: Protecting analog telephone interface (FXS) ports in VoIP gateways and IP-PBX systems from lightning and AC power cross. IC Role / Device Role / Timing Role: Standalone primary protector mounted at RJ-11 connector, before hybrid and codec ICs. Use Value: 140 V VRM aligns with -48 V DC feed + 150 V AC ringing envelope, preventing nuisance triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar telecom surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SPA140H | Unidirectional, 140 V VWM, 200 V VBR, 100 A IPP (8/20 µs), 25 pF capacitance | Requires external back-to-back configuration for AC line use; higher capacitance limits usable bandwidth | Select when higher IPP (8/20 µs) is prioritized over signal fidelity; requires additional PCB area and layout complexity |
| Bourns 2061-14-SM | Bidirectional, 140 V VDRM, 190 V VBO, 60 A IPP (10/1000 µs), 15 pF capacitance, DO-214AB (SMC) package | Larger SMC package increases board space; lower IPP reduces margin for repeated surges per GR-1089 | Choose if legacy SMC footprint compatibility is required; verify thermal derating due to higher Rth(j-a) |
Compared with SMP80MC-140, the SPA140H trades bidirectionality and low capacitance for higher 8/20 µs surge rating, while the 2061-14-SM retains bidirectionality but sacrifices surge margin and board-space efficiency - making SMP80MC-140 optimal for space-constrained, high-speed telecom line cards requiring fail-safe reliability.
Availability
SMP80MC-140 is available at Aetrix Electronics and suitable for telecom line interface protection, DSLAM port hardening, ISDN S/T interface safeguarding, and VoIP gateway FXS port surge suppression requiring stable component supply across long-lifecycle deployments.
Supply support for SMP80MC-140 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, MCU, and protection devices for industrial, automotive, and communications markets.
The Trisil™ product line delivers fail-safe, bidirectional thyristor-based surge protectors optimized for telecom infrastructure - engineered specifically to meet GR-1089, ITU-T K-series, and IEC 61000-4-5 immunity standards without compromising signal integrity.
FAQ
What is the fail-safe behavior of SMP80MC-140 under end-of-life conditions?
The SMP80MC-140 enters a permanent short-circuit state when degraded by repeated or excessive surge stress - a defined fail-safe mode that maintains galvanic isolation of downstream circuitry and satisfies UL60950 Clause 4.6.2. This behavior is inherent to its thyristor structure and does not require external monitoring or shutdown circuitry.
Can SMP80MC-140 be used in DC-powered telecom systems like -48 V central office applications?
Yes - its 140 V VRM and bidirectional symmetry allow direct placement across -48 V DC feed lines with AC ringing superimposed (e.g., 150 Vpk). The device remains non-conductive below 140 V and triggers only during surge events exceeding 180 V, avoiding interference with normal line signaling or battery backup operation.
How does the 12 pF capacitance affect ADSL2+ performance?
At 12 pF, the SMP80MC-140 introduces <0.2 dB insertion loss at 2.2 MHz (ADSL2+ upper band edge) and maintains group delay flatness within ±0.5 ns across 0–2.2 MHz - preserving bit-error-rate performance and eliminating need for post-protector equalization in standard line drivers.
Is SMB (DO-214AA) footprint compatible with other ST Trisil variants like SMP80MC-200?
Yes - all SMP80MC variants share identical DO-214AA (SMB) mechanical dimensions, pad layout, and thermal characteristics per Figure 14 in Doc ID 9702 Rev 5. Designers may substitute voltage grades (e.g., -140 → -200) without PCB revision, provided system-level surge coordination and voltage margin analysis are updated.
SMP80MC-140 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMP, TRISIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 180V
- Voltage - Off State:
- 140V
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- 200 A
- Current - Peak Pulse (10/1000µs):
- 80 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 25pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMP80MC-140 FAQ
1.How can I place an order for SMP80MC-140 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP80MC-140 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 SMP80MC-140 reliable?
The price and inventory of SMP80MC-140 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP80MC-140 is usually 5 days.
3.What payment methods are accepted for SMP80MC-140?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP80MC-140 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP80MC-140?
SMP80MC-140 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP80MC-140 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 SMP80MC-140?
For technical support, including SMP80MC-140 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP80MC-140 requirements.
6.How does Aetrix verify that SMP80MC-140 is sourced from the original manufacturer or authorized distributors?
All SMP80MC-140 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 SMP80MC-140 meets industry standards.
7.What is the process for return or replacement of SMP80MC-140?
All SMP80MC-140 units undergo pre-shipment inspection (PSI). If there is an issue with SMP80MC-140, 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 SMP80MC-140 part is unused and in its original packaging.
Return procedure for SMP80MC-140:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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