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STMicroelectronics SMP80MC-320
- Part No.:
- SMP80MC-320
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMP80MC-320.pdf
- Description:
- THYRISTOR 320V 200A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,427
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Product details
Overview
SMP80MC-320 from STMicroelectronics is a bidirectional Trisil™ transient voltage surge suppressor (TVSS) designed for primary-level overvoltage protection in telecom line interfaces. It features a 320 V stand-off voltage (VRM), 400 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-320 datasheet, SMP80MC-320 pinout, SMP80MC-320 application, or SMP80MC-320 equivalent, this device is selected for telecom surge protection where micro-capacitance, fail-safe short-circuit behavior, and GR-1089 Core compliance are critical design requirements.
Technical Context
The SMP80MC-320 operates as a crowbar-type protector: it remains high-impedance below 320 V, triggers rapidly at ~400 V under surge conditions, and latches into low-impedance conduction until current falls below 150 mA holding threshold. Its bidirectional symmetry supports AC-coupled telecom lines without polarity constraints.
Thermal design relies on its SMB (DO-214AA) package with Rth(j-a) = 100 °C/W (recommended footprint) and IFS = 5 kA fail-safe short-circuit rating. It meets IEC 61000-4-5 (4 kV, 10/700 µs), ITU-T K20/K21 (6 kV), and GR-1089 Core first-level (2.5 kV, 10/1000 µs) test profiles with minimal series resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 320 V - maximum continuous reverse voltage before leakage exceeds 2 µA; defines operating margin for 48 V telecom lines. |
| Dynamic Breakover Voltage (VBO) | 400 V @ 100 V/µs - clamping threshold under fast-rising surges; ensures reliable triggering before downstream IC damage. |
| Repetitive Peak Pulse Current (IPP) | 80 A (10/1000 µs) - sustains repeated lightning-induced transients without degradation; validated per GR-1089 Core. |
| Junction Capacitance (C) | 12 pF @ 50 V - preserves signal integrity up to 30 MHz; compatible with ADSL2+ (up to 2.2 MHz) and VDSL2 (up to 17 MHz). |
| Holding Current (IH) | 150 mA min - minimum current required to maintain conduction; ensures robust latch-on during sustained overvoltage events. |
| Leakage Current (IR) | 2 µA max @ VRM - negligible DC loading on line interface; avoids false triggering or bias shift in analog front-ends. |
Pinout & Package
Package: SMB (JEDEC DO-214AA), surface-mount, lead-free, UL94 V0 epoxy. Dimensions: 5.10–5.60 mm (E), 4.05–4.60 mm (E1), 3.30–3.95 mm (D), 1.90–2.45 mm (A1), 0.75–1.50 mm (L). Cathode bar marking indicates unidirectional variants only; SMP80MC-320 is bidirectional and unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Primary terminal (bidirectional) | One side of symmetrical crowbar structure; connects to line input (e.g., tip or ring in POTS). |
| Cathode (K) | Common reference terminal | Center node tied to ground or protection common; enables bidirectional clamping between A1 and A2. |
| Anode 2 (A2) | Secondary terminal (bidirectional) | Second symmetrical terminal; completes bidirectional path across protected line pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar action | Enables single-device protection of AC-coupled telecom lines (e.g., tip/ring) without external diodes or polarity concerns. |
| Fail-safe short-circuit mode | Guarantees permanent low-impedance path under end-of-life overstress - prevents open-circuit failure and maintains system safety. |
| Micro capacitance (12 pF) | Minimizes insertion loss and phase distortion in broadband DSL signals; eliminates need for compensation networks. |
| GR-1089 Core compliance | Validated for first-level (2.5 kV, 10/1000 µs), second-level (5 kV), and intra-building (1.5 kV) telecom surge tests per Telcordia. |
| UL497B recognition | Approved for use in primary protectors per UL497B (File E136224); simplifies end-equipment safety certification. |
Applications
| DSL Line Interface Protection | Central Office Line Card |
|---|---|
|
Use Scenario: Protecting ADSL2+/VDSL2 line drivers and receivers from lightning-induced surges on copper twisted-pair loops. IC Role / Device Role / Timing Role: Primary crowbar protector placed before transformer or line driver IC; clamps transients within nanoseconds. Use Value: 12 pF capacitance avoids signal attenuation above 10 MHz; 80 A IPP handles multiple GR-1089 surges without parameter drift. |
Use Scenario: Front-end surge suppression on carrier-grade line cards handling 100+ subscriber lines in central office DSLAMs. IC Role / Device Role / Timing Role: First-stage protector in multi-tier architecture; absorbs >90% of surge energy before secondary TVS or MOV stages. Use Value: Fail-safe short-circuit behavior ensures no line interruption during aging; UL497B recognition accelerates NEBS Level 3 certification. |
| VoIP Gateway Protection | ISDN BRI Interface |
|
Use Scenario: Safeguarding analog telephone adapters (ATAs) and VoIP gateways against power-cross and induced surges in residential deployments. IC Role / Device Role / Timing Role: Bidirectional line protector across FXS/FXO ports; operates symmetrically on ±48 V phantom-powered lines. Use Value: 320 V VRM provides 6.7× margin over nominal -48 V DC; low leakage avoids battery drain in backup-powered units. |
Use Scenario: Protecting ISDN Basic Rate Interface (BRI) S/T bus (100 Ω balanced) from surges in building wiring and PBX interconnects. IC Role / Device Role / Timing Role: Standalone protector on each differential pair; leverages bidirectional symmetry for T/R and S/T polarity independence. Use Value: 400 V VBO ensures clean triggering before ISDN transceiver ICs (e.g., SLICs) reach absolute max ratings (typically 45 V). |
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 SP1003-032 | Unidirectional; 32 V breakdown; requires external back-to-back configuration for AC lines. | Higher capacitance (30 pF); unsuitable for >10 MHz DSL signals without bandwidth limiting. | Select only when discrete unidirectional protection with tighter voltage tolerance is needed and layout allows dual-device placement. |
| ON Semiconductor NUF2221 | ESD-only polymer TVS; 12 V working voltage; 30 A (8/20 µs) rating; not rated for lightning surges. | Designed for board-level ESD (IEC 61000-4-2), not line-level lightning (IEC 61000-4-5 or GR-1089). | Use only as secondary protection after primary Trisil/MOV; never as standalone telecom line protector. |
Compared with SP1003-032 and NUF2221, the SMP80MC-320 uniquely combines bidirectional 320 V standoff, 80 A lightning surge capability, and 12 pF capacitance - making it the only single-device solution qualified for GR-1089 Core first-level protection in high-speed telecom interfaces.
Availability
SMP80MC-320 is available at Aetrix Electronics and suitable for DSLAM line cards, VoIP gateway front-ends, and ISDN BRI interface modules requiring stable component supply, long-term lifecycle support, and certified telecom surge protection.
Supply support for SMP80MC-320 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, specializing in power management, analog, MEMS, and automotive ICs with broad industrial and communications portfolio coverage.
The SMP80MC series belongs to ST's Trisil™ transient protection product line, engineered specifically for fail-safe, high-reliability surge suppression in telecom infrastructure - emphasizing GR-1089, ITU-T K-series, and UL-compliant primary protection.
FAQ
What is the fail-safe behavior of SMP80MC-320 under end-of-life overstress?
The SMP80MC-320 enters a permanent short-circuit state when degraded by excessive surge energy - verified by IFS = 5 kA (8/20 µs) testing. This fail-safe mode maintains circuit continuity and prevents open-circuit failure, ensuring downstream equipment remains protected even after device exhaustion. No fuse or secondary disconnect is required.
Can SMP80MC-320 be used in DC-powered telecom systems like -48 V POTS lines?
Yes. With a 320 V stand-off voltage (VRM), the SMP80MC-320 provides 6.7× margin above nominal -48 V DC, allowing safe operation with typical line fluctuations and ringing voltages up to ±150 V. Its bidirectional design accommodates both positive and negative surges without polarity sensitivity.
How does SMP80MC-320 compare to MOV-based primary protectors in telecom applications?
Unlike MOVs, the SMP80MC-320 exhibits no aging or parameter drift after repeated surges, maintains stable 12 pF capacitance over lifetime, and guarantees fail-safe short-circuit behavior. MOVs degrade with each event, increase leakage, and may fail open - risking unprotected operation. Trisil's silicon-based crowbar offers superior longevity and predictability in carrier-grade systems.
Is thermal derating required for SMP80MC-320 in high-ambient-temperature environments?
Yes. At 100 °C ambient, junction temperature rise must be limited using the Rth(j-a) = 100 °C/W rating. For 80 A pulses, peak power dissipation reaches ~32 W (400 V × 80 A × duty factor); PCB copper area and airflow must ensure Tj stays ≤150 °C. Derate IPP by 20% above 70 °C ambient per ST's thermal guidelines.
SMP80MC-320 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMP, TRISIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 400V
- Voltage - Off State:
- 320V
- 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-320 FAQ
1.How can I place an order for SMP80MC-320 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP80MC-320 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-320 reliable?
The price and inventory of SMP80MC-320 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP80MC-320 is usually 5 days.
3.What payment methods are accepted for SMP80MC-320?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP80MC-320 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP80MC-320?
SMP80MC-320 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP80MC-320 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-320?
For technical support, including SMP80MC-320 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP80MC-320 requirements.
6.How does Aetrix verify that SMP80MC-320 is sourced from the original manufacturer or authorized distributors?
All SMP80MC-320 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-320 meets industry standards.
7.What is the process for return or replacement of SMP80MC-320?
All SMP80MC-320 units undergo pre-shipment inspection (PSI). If there is an issue with SMP80MC-320, 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-320 part is unused and in its original packaging.
Return procedure for SMP80MC-320:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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