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STMicroelectronics SMP100MC-270
- Part No.:
- SMP100MC-270
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMP100MC-270.pdf
- Description:
- THYRISTOR 270V 300A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,198
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Product details
Overview
SMP100MC-270 from STMicroelectronics is a bidirectional thyristor surge suppressor (TSS) designed for fail-safe overvoltage protection on high-speed data lines. It features a 270 V breakover voltage (VBO), 335 V static VBO, 20 mA holding current (IH), 40 pF capacitance at 50 V, and 100 A repetitive peak pulse current (10/1000 μs). It is used in ADSL2+ line cards to prevent signal distortion while meeting GR-1089 Core and ITU-T K20/K21 lightning immunity requirements.
For engineers reviewing the SMP100MC-270 datasheet, SMP100MC-270 pinout, SMP100MC-270 application, or SMP100MC-270 equivalent, key selection criteria include bidirectional crowbar action, micro-capacitance (<45 pF), low leakage (≤2 μA), fail-safe short-circuit mode under surge, and compliance with UL497B, IEC 61000-4-5, and telecom-specific surge standards.
Technical Context
The SMP100MC-270 operates as a voltage-triggered bidirectional thyristor that latches into low-impedance conduction upon exceeding its dynamic breakover voltage (345 V), maintaining conduction until current falls below 20 mA holding threshold. Its design enables self-resetting only after power cycle or current interruption - not automatic recovery.
It delivers 100 A surge handling per 10/1000 μs waveform with thermal robustness up to 150 °C junction temperature and fails short-circuit - a certified fail-safe behavior validated per UL497B and IEC 61000-4-5 Level 4 ESD immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakover Voltage (VBO) | 345 V - triggers crowbar conduction during transient overvoltage events above this threshold |
| Static VBO | 335 V - ensures stable DC clamping margin before latch-up |
| Holding Current (IH) | 20 mA min - defines minimum current required to sustain conduction post-trigger |
| Junction Capacitance | 40 pF at 50 V - preserves signal integrity on ADSL2+/VDSL lines without distortion |
| Repetitive Peak Pulse Current | 100 A (10/1000 μs) - withstands repeated telecom-grade lightning surges without degradation |
| Leakage Current (IR) | 2 μA max at VR = 243 V - minimizes standby power loss and false triggering |
| Operating Junction Temp | –40 °C to +150 °C - supports deployment in uncontrolled telecom cabinets and industrial environments |
Pinout & Package
Supplied in JEDEC-registered DO-214AA (SMB) package with gull-wing leads, compliant with UL94 V0 epoxy and lead-free plating. Thermal resistance is 100 °C/W (junction-to-ambient, with recommended footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point in positive half-cycle | Connected to protected line; forms bidirectional conduction path with Cathode |
| Cathode (K) | Surge current exit point in positive half-cycle | Typically tied to ground or return path; completes crowbar loop during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar protection | Triggers symmetrically on both polarities - eliminates need for back-to-back device pairing |
| Fail-safe short-circuit mode | Latches low-impedance state during surge - prevents open-circuit failure and protects downstream ICs |
| Micro-capacitance (40 pF) | Enables use on 24 Mbps ADSL2+ and 52 Mbps VDSL lines without insertion loss or jitter penalty |
| UL497B recognition & GR-1089 compliance | Validated for primary-side telecom surge protection - reduces certification effort for central office equipment |
| JEDEC DO-214AA (SMB) package | Standardized footprint enables drop-in replacement and automated assembly compatibility |
Applications
| ADSL2+ Line Cards | VDSL Central Office Equipment |
|---|---|
|
Use Scenario: Protection of copper pair interfaces in DSLAM line cards exposed to induced lightning surges on outside plant wiring. IC Role / Device Role / Timing Role: Bidirectional crowbar clamping device placed between tip/ring and ground, triggered within nanoseconds of overvoltage onset. Use Value: Prevents damage to line driver/receiver ICs while maintaining <45 pF loading to preserve 24 Mbps symbol rate fidelity. |
Use Scenario: Primary surge protection for analog front-end circuits in carrier-grade VDSL distribution frames. IC Role / Device Role / Timing Role: Fail-safe shunt protector on subscriber line interface circuit (SLIC) inputs, rated for GR-1089 Core Level 1 (2500 V, 100 A). Use Value: Eliminates risk of open-circuit failure during multi-kA surges - maintains system safety even after activation. |
| Telecom Terminal Devices | Industrial Ethernet Media Converters |
|
Use Scenario: Surge protection on POTS/ISDN ports of VoIP gateways and fax modems installed in building entrances. IC Role / Device Role / Timing Role: First-stage protector on telephone line interface, coordinated with secondary TVS diodes for low-clamping response. Use Value: Meets ITU-T K21 (6 kV, 10/700 μs) and UL1459 requirements without compromising voice-band signal quality. |
Use Scenario: Data line protection on RS-485/Ethernet PHY interfaces in factory automation gateways exposed to AC mains coupling. IC Role / Device Role / Timing Role: High-energy crowbar element on twisted-pair data lines, operating in coordination with series impedance for IEC 61000-4-5 compliance. Use Value: Handles 4 kV (1.2/50 μs) common-mode surges while adding <40 pF parasitic capacitance - no equalization needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP1002-270 | Same 270 V VBO, but 120 A (10/1000 μs) rating and 55 pF capacitance | Higher surge rating suits harsher outdoor deployments; higher C limits use on >10 Mbps lines | Select when higher single-pulse robustness is prioritized over signal bandwidth preservation |
| ON Semiconductor NUF2042MUTAG | Unidirectional, 24 V clamping, 12 pF, 30 A (8/20 μs); not fail-safe | Designed for low-voltage USB/IO protection - lacks telecom surge energy handling and crowbar behavior | Only suitable for secondary protection stages where TSS-level energy absorption is unnecessary |
Compared with SP1002-270 and NUF2042MUTAG, the SMP100MC-270 uniquely balances telecom-grade surge immunity (100 A, GR-1089), fail-safe operation, and ultra-low capacitance - making it optimal for primary protection on broadband access line cards where signal integrity and safety certification are jointly critical.
Availability
SMP100MC-270 is available at Aetrix Electronics and suitable for ADSL2+ line cards, VDSL central office equipment, telecom terminal devices, and industrial Ethernet media converters requiring stable component supply across long-lifecycle deployments.
Supply support for SMP100MC-270 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, automotive ICs, and industrial protection devices with broad manufacturing scale and AEC-Q100/IECQ qualification capabilities.
The SMP100MC series belongs to ST's Telecom Circuit Protector product line, engineered specifically to meet GR-1089, ITU-T K20/K21, and UL497B requirements for fail-safe surge suppression on high-data-rate copper interfaces.
FAQ
What is the fail-safe behavior of SMP100MC-270 during surge events?
The SMP100MC-270 enters a low-impedance short-circuit state when triggered and remains latched until current drops below its 20 mA holding threshold - typically requiring power removal or current interruption. This behavior is certified per UL497B and prevents open-circuit failure, ensuring downstream circuit protection even after activation.
Can SMP100MC-270 be used in AC power line protection?
No - the SMP100MC-270 is rated for signal/data line protection only, with maximum continuous reverse voltage of 243 V and no RMS AC voltage rating. Its 270 V breakover voltage and 150 °C junction limit make it unsuitable for direct AC mains interfacing; dedicated AC-rated TSS or MOV solutions are required instead.
How does SMP100MC-270 coordinate with downstream TVS diodes?
It functions as a first-stage crowbar device, diverting bulk surge energy to ground, while downstream low-capacitance TVS diodes (e.g., 12 V clamping) handle residual transients and provide faster response. Coordination requires a series impedance (e.g., 1–10 Ω) between stages to limit current and ensure proper voltage division during surge events.
Is SMB (DO-214AA) footprint compatible with automated SMT assembly?
Yes - the SMB package has standardized gull-wing leads with 2.2 mm nominal lead width and 5.35 mm body width, fully supported by industry-standard pick-and-place machines and reflow profiles. ST specifies 260 °C maximum lead temperature for 10 s, aligning with IPC-J-STD-020 moisture sensitivity level 1 requirements.
SMP100MC-270 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMP, TRISIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Breakover:
- 335V
- Voltage - Off State:
- 270V
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- 300 A
- Current - Peak Pulse (10/1000µs):
- 100 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 40pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMP100MC-270 FAQ
1.How can I place an order for SMP100MC-270 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP100MC-270 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 SMP100MC-270 reliable?
The price and inventory of SMP100MC-270 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP100MC-270 is usually 5 days.
3.What payment methods are accepted for SMP100MC-270?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP100MC-270 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP100MC-270?
SMP100MC-270 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP100MC-270 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 SMP100MC-270?
For technical support, including SMP100MC-270 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP100MC-270 requirements.
6.How does Aetrix verify that SMP100MC-270 is sourced from the original manufacturer or authorized distributors?
All SMP100MC-270 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 SMP100MC-270 meets industry standards.
7.What is the process for return or replacement of SMP100MC-270?
All SMP100MC-270 units undergo pre-shipment inspection (PSI). If there is an issue with SMP100MC-270, 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 SMP100MC-270 part is unused and in its original packaging.
Return procedure for SMP100MC-270:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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