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STMicroelectronics SM15T200CA
- Part No.:
- SM15T200CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T200CA.pdf
- Description:
- TVS DIODE 171VWM 353VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,781
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Product details
Overview
SM15T200CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in SMC package, designed for high-energy surge protection in industrial and telecom power lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 274 V (max) under 353 A surge current, and operates up to 150 °C junction temperature - enabling robust ESD and EFT protection in AC/DC front-ends and PoE injectors.
For engineers reviewing the SM15T200CA datasheet, SM15T200CA pinout, SM15T200CA application, or SM15T200CA equivalent, key selection criteria include bidirectional standoff voltage (200 V), low leakage (<0.2 µA at 25 °C), dynamic resistance (5.11 Ω), IEC 61000-4-2 ±30 kV contact discharge compliance, and SMC footprint compatibility with IPC7531 standards.
Technical Context
This TVS diode uses planar silicon technology to achieve stable clamping performance across -55 °C to +150 °C operating junction temperature. Its bidirectional architecture enables symmetric surge suppression on AC-coupled or floating signal/power lines without polarity constraints.
Clamping voltage scales linearly with temperature via αT = 10.8 × 10−4/°C, and dynamic resistance (RD = 5.11 Ω) governs voltage overshoot during fast transients (8/20 µs). The device meets IEC 61000-4-4 Level 4 (4 kV) and exceeds IEC 61000-4-2 Level 4 (±30 kV) for both air and contact discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 200 V - maximum continuous reverse working voltage before breakdown; defines minimum system operating margin against false triggering. |
| Breakdown Voltage (VBR) | 171–190 V at 1 mA - precise avalanche onset threshold ensuring predictable turn-on during overvoltage events. |
| Clamping Voltage (VCL) | 274 V max at 353 A (10/1000 µs) - limits downstream component stress during worst-case surge conditions. |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - sustained energy-handling capability for repetitive surges in industrial power supplies. |
| Leakage Current (IR) | ≤0.2 µA at 200 V, 25 °C - negligible standby power loss and minimal impact on high-impedance sensing circuits. |
| Dynamic Resistance (RD) | 5.11 Ω - determines voltage rise per ampere of surge current; critical for predicting actual clamping under real-world transients. |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in harsh environments including outdoor telecom cabinets and motor drive enclosures. |
Pinout & Package
SM15T200CA is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode (K) and Anode (A). The bidirectional configuration means both terminals function identically under reverse/forward surge polarity, eliminating orientation dependency during PCB placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point (positive polarity) | Accepts transient energy during positive half-cycle surges; forms symmetrical conduction path with Cathode. |
| Cathode (K) | Surge current entry point (negative polarity) | Accepts transient energy during negative half-cycle surges; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection on AC lines or floating DC buses without external polarity management circuitry. |
| Low dynamic resistance (5.11 Ω) | Minimizes clamping voltage overshoot during fast-rising 8/20 µs transients, improving protection margin for downstream ICs. |
| High-temperature reliability (Tj max = 150 °C) | Ensures stable VBR and leakage performance in thermally constrained enclosures such as sealed power adapters. |
| IEC 61000-4-2 ±30 kV compliance | Validated for direct ESD strikes in industrial HMI panels and field-deployed instrumentation interfaces. |
| Matte tin lead finish | Supports RoHS-compliant reflow soldering per J-STD-020 MSL Level 1, with no moisture sensitivity concerns pre-assembly. |
Applications
| Industrial AC Power Input | Telecom Line Interface |
|---|---|
|
Use Scenario: Protection of AC-DC converter inputs against lightning-induced surges on 230 VAC mains. IC Role / Device Role / Timing Role: Primary surge clamp placed across L-N and L/N-PE, absorbing >1 kA 8/20 µs transients before rectifier bridge. Use Value: Prevents catastrophic failure of bridge rectifiers and bulk capacitors by limiting peak line voltage to ≤274 V during 353 A surges. |
Use Scenario: Surge protection on POTS or xDSL line cards exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Bidirectional shunt element across tip/ring pair, clamping differential-mode transients within 1 ns response time. Use Value: Maintains signal integrity below 100 pF capacitance while surviving repeated 4 kV IEC 61000-4-4 bursts without parameter drift. |
| PoE Power Sourcing Equipment | Motor Drive Control Board |
|
Use Scenario: Secondary-side overvoltage protection on 48 V DC power rails feeding IEEE 802.3af/at PDs. IC Role / Device Role / Timing Role: Fast-response clamp between VPOE and return, triggered by inductive kickback from disconnected powered devices. Use Value: Limits rail collapse to <274 V during 353 A transients, preventing latch-up in PMICs and preserving Ethernet PHY functionality. |
Use Scenario: Protection of isolated gate driver supply rails against cross-talk surges from IGBT switching noise. IC Role / Device Role / Timing Role: Local clamp on 15–24 V auxiliary supply, suppressing common-mode spikes coupled through transformer parasitics. Use Value: Reduces gate driver reset events by maintaining supply voltage above UVLO threshold during 10/1000 µs 1500 W surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ200CA (Bourns) | Lower PPP (600 W), higher RD (7.5 Ω), SMB package (smaller thermal mass) | Limited to lower-energy surges; less suitable for repeated 1500 W events in industrial power inputs | Select when board space is constrained and surge duty cycle is infrequent. |
| 1.5KE200CA (Littelfuse) | Through-hole DO-201 package, same VRWM/VCL, but slower thermal recovery and no MSL-1 rating | Not suitable for automated SMT assembly; requires wave soldering and lacks reflow compatibility | Choose only for legacy through-hole designs where SMT conversion is not feasible. |
Compared with SMBJ200CA and 1.5KE200CA, SM15T200CA offers superior thermal endurance (150 °C Tj), tighter clamping (274 V vs ≥285 V), and SMT-ready SMC packaging - making it optimal for high-reliability, high-volume industrial power modules requiring IPC-compliant assembly.
Availability
SM15T200CA is available at Aetrix Electronics and suitable for industrial AC power input protection, telecom line interface hardening, PoE power sourcing equipment, and motor drive control board surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SM15T200CA 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 microcontroller technologies for industrial, automotive, and consumer markets.
The SM15T series belongs to ST's high-power TVS diode product line, engineered specifically for robust electromagnetic immunity in harsh-environment power conversion and communication infrastructure applications.
FAQ
What is the difference between SM15T200A and SM15T200CA?
SM15T200A is unidirectional and protects only one polarity of surge (e.g., positive-only transients), while SM15T200CA is bidirectional and suppresses surges of either polarity symmetrically. This makes the CA version ideal for AC lines, floating DC buses, or differential signal pairs where polarity is undefined or alternating.
Can SM15T200CA be used in parallel for higher surge current handling?
No - paralleling TVS diodes without matched VBR and RD causes current imbalance and premature failure. ST does not recommend parallel operation. For higher current, select a higher-rated device like SM20T200CA (2000 W) or verify derating per Figure 3 in DS0683 Rev 8.
What is the recommended PCB footprint for SM15T200CA?
The official footprint is defined in Figure 14 of DS0683 Rev 8: 5.11 mm × 8.19 mm pad centerline spacing, with 1.54 mm pad width and 3.14 mm pad length. Copper area under each lead must exceed 1 cm² to maintain Rth(j-a) ≤ 100 °C/W per Figure 12.
Does SM15T200CA meet UL 497B certification?
Yes - SM15T200CA carries UL 497B file number QVGQ2.E136224, certifying its suitability for primary-protection applications in telecommunications and data line equipment per ANSI/UL 497B requirements.
SM15T200CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 171V
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 353V
- Current - Peak Pulse (10/1000µs):
- 28A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SM15T200CA FAQ
1.How can I place an order for SM15T200CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T200CA 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 SM15T200CA reliable?
The price and inventory of SM15T200CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T200CA is usually 5 days.
3.What payment methods are accepted for SM15T200CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T200CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T200CA?
SM15T200CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T200CA 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 SM15T200CA?
For technical support, including SM15T200CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T200CA requirements.
6.How does Aetrix verify that SM15T200CA is sourced from the original manufacturer or authorized distributors?
All SM15T200CA 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 SM15T200CA meets industry standards.
7.What is the process for return or replacement of SM15T200CA?
All SM15T200CA units undergo pre-shipment inspection (PSI). If there is an issue with SM15T200CA, 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 SM15T200CA part is unused and in its original packaging.
Return procedure for SM15T200CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T200CA Tags
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