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STMicroelectronics SMP100MC-400
- Part No.:
- SMP100MC-400
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMP100MC-400.pdf
- Description:
- THYRISTOR 400V 300A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,844
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Product details
Overview
SMP100MC-400 from STMicroelectronics is a bidirectional thyristor surge suppressor (TSS) designed for fail-safe overvoltage protection on high-speed data lines. It features a 400 V breakover voltage (VBO), 15 pF capacitance at 50 V, 2 µA max leakage current, 150 mA minimum holding current, and 100 A repetitive peak pulse current (10/1000 µs), enabling robust lightning and AC fault protection in ADSL2+/VDSL line cards.
For engineers reviewing the SMP100MC-400 datasheet, SMP100MC-400 pinout, SMP100MC-400 application, or SMP100MC-400 equivalent, this device is selected for telecom surge protection where low capacitance, bidirectional crowbar action, IEC 61000-4-5 compliance, and UL497B recognition are mandatory design requirements.
Technical Context
The SMP100MC-400 operates as a voltage-triggered bidirectional thyristor that latches into low-impedance conduction upon exceeding its dynamic breakover voltage (540 V typ.) and remains conducting until current falls below 150 mA. Its micro-capacitance (15–30 pF) minimizes signal distortion on digital transmission lines up to VDSL frequencies.
It meets GR-1089 Core (first/second/intra-building levels), ITU-T K20/K21, IEC 61000-4-2 Level 4, and UL497B - with fail-safe short-circuit behavior under sustained overcurrent, eliminating degradation risks inherent in MOV-based protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBO (Dynamic) | 540 V typical - triggers reliably above 400 V nominal rating without false trips during normal line transients |
| VR (Max Reverse Voltage) | 360 V - defines maximum continuous AC/DC working voltage before risk of premature conduction |
| C (Capacitance) | 15 pF at 50 V - preserves signal integrity on ADSL2+/low-end VDSL lines with minimal insertion loss |
| IPP | 100 A (10/1000 µs) - withstands repeated lightning-induced surges per IEC 61000-4-5 Category 3/4 |
| IH | 150 mA min - ensures stable latching during surge decay while avoiding nuisance dropout on noisy lines |
| IR | 2 µA max at 360 V - prevents DC loading and power loss in always-on telecom interfaces |
Pinout & Package
Package: DO-214AA (SMB), JEDEC-registered, surface-mount, halogen-free, UL94 V0 epoxy, lead-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry (bidirectional) | Connects to protected line; conducts in either polarity when VBO exceeded |
| Cathode (K) | Surge current exit (bidirectional) | Connects to ground or return path; completes low-impedance crowbar path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar protection | Self-latching conduction in both polarities eliminates need for back-to-back device pairing |
| Fail-safe short-circuit mode | Guarantees equipment shutdown instead of open-circuit failure - critical for UL60950 compliance |
| Micro-capacitance (15–30 pF) | Enables use on >10 Mbps digital lines (ADSL2+, VDSL) without degrading eye diagram or BER |
| Low leakage (2 µA max) | Prevents baseline drift and false triggering in high-impedance analog/digital receiver inputs |
| JEDEC DO-214AA (SMB) package | Standardized footprint enables drop-in replacement and automated assembly compatibility |
Applications
| ADSL2+ Line Card Protection | VDSL Central Office Interface |
|---|---|
Use Scenario: Protecting DSLAM line cards from induced surges on twisted-pair subscriber loops. IC Role / Device Role / Timing Role: Bidirectional crowbar clamping device placed between tip/ring and ground, triggered by >540 V transients. Use Value: 15 pF capacitance avoids signal attenuation at 2.2 MHz, preserving upstream SNR and sync stability. | Use Scenario: Surge protection on VDSL ports in carrier-grade central office equipment. IC Role / Device Role / Timing Role: Primary overvoltage protector on differential data pairs compliant with ITU-T K21 and GR-1089 Core. Use Value: Fail-safe short-circuit behavior satisfies UL497B and CSA C22.2 No. 1459 for telecom safety certification. |
| Modem/Fax Terminal Protection | Industrial Ethernet Port Protection |
Use Scenario: Secondary-level protection on POTS/ISDN modems and fax machines connected to public telephone lines. IC Role / Device Role / Timing Role: Fast-acting TSS placed after primary gas discharge tube (GDT), handling residual energy per IEC 61000-4-5. Use Value: 100 A (10/1000 µs) rating absorbs residual surge energy without thermal runaway or parameter shift. | Use Scenario: Data line protection on industrial Ethernet switches deployed in outdoor or electrically noisy environments. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on 10/100BASE-TX differential pairs meeting IEC 61000-4-5 Level 3. Use Value: 360 V reverse standoff supports 24 V PoE-compatible signaling margins while clamping at 540 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ40CA | Unidirectional TVS diode; 40 V standoff, 64.3 V clamping; no latching behavior | Lacks fail-safe short-circuit mode; requires external current limiting; unsuitable for GR-1089 second-level testing | Select only if crowbar action and UL497B recognition are not required |
| TISP4240M3BJR-S | Triac-based TSS; 240 V VDRM; 100 A rating; higher capacitance (45 pF) | Higher capacitance limits use to sub-10 Mbps lines; certified to UL497 but not UL497B | Acceptable for legacy ADSL1 systems where bandwidth headroom allows 45 pF loading |
Compared with SMCJ40CA and TISP4240M3BJR-S, SMP100MC-400 uniquely combines 400 V standoff, 15 pF capacitance, and UL497B recognition - making it the only option qualified for fail-safe, high-bandwidth telecom surge protection per GR-1089 Core first-level requirements.
Availability
SMP100MC-400 is available at Aetrix Electronics and suitable for ADSL2+ line cards, VDSL central office interfaces, modem/fax terminal protection, and industrial Ethernet port protection requiring stable component supply across multi-year production cycles.
Supply support for SMP100MC-400 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 SMP100MC series belongs to ST's Telecom Circuit Protector product line, engineered specifically to meet stringent GR-1089, ITU-T K20/K21, and UL497B requirements for fail-safe, high-data-rate surge suppression.
FAQ
What is the fail-safe behavior of SMP100MC-400 during sustained overvoltage?
When subjected to overvoltage exceeding its breakover threshold for longer than its thermal time constant, SMP100MC-400 enters a permanent low-impedance short-circuit state - physically disconnecting the protected circuit from the surge source. This behavior is verified per UL497B and eliminates fire or smoke hazards associated with open-failure modes.
Can SMP100MC-400 be used in series with a GDT for enhanced surge handling?
Yes - SMP100MC-400 is routinely paired with a gas discharge tube (GDT) in two-stage telecom protectors. The GDT handles bulk energy (e.g., 5 kA 8/20 µs), while the SMP100MC-400 clamps residual voltage to <30 V and provides fast response (<100 ns) to ensure downstream IC survival per ITU-T K21.
Does SMP100MC-400 require a series current-limiting resistor in ADSL2+ applications?
No - its 150 mA minimum holding current and 100 A surge rating allow direct placement on tip/ring lines without external resistors. However, a 1–2 Ω resistor may be added for precise coordination with upstream GDTs in GR-1089-compliant designs to prevent misfiring during fast-rising transients.
How does SMP100MC-400 differ from standard TVS diodes in telecom protection?
Unlike TVS diodes, SMP100MC-400 uses thyristor-based crowbar action: it latches ON until current drops below 150 mA, providing sustained short-circuit protection during prolonged faults. TVS diodes clamp only temporarily and can thermally fail under sustained overvoltage - a key distinction mandated by UL497B and GR-1089 Core.
SMP100MC-400 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMP, TRISIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Breakover:
- 530V
- Voltage - Off State:
- 400V
- 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:
- 30pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMP100MC-400 FAQ
1.How can I place an order for SMP100MC-400 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP100MC-400 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-400 reliable?
The price and inventory of SMP100MC-400 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP100MC-400 is usually 5 days.
3.What payment methods are accepted for SMP100MC-400?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP100MC-400 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP100MC-400?
SMP100MC-400 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP100MC-400 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-400?
For technical support, including SMP100MC-400 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP100MC-400 requirements.
6.How does Aetrix verify that SMP100MC-400 is sourced from the original manufacturer or authorized distributors?
All SMP100MC-400 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-400 meets industry standards.
7.What is the process for return or replacement of SMP100MC-400?
All SMP100MC-400 units undergo pre-shipment inspection (PSI). If there is an issue with SMP100MC-400, 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-400 part is unused and in its original packaging.
Return procedure for SMP100MC-400:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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