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STMicroelectronics SMTY5.0A
- Part No.:
- SMTY5.0A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMTY5.0A.pdf
- Description:
- TVS DIODE 5VWM 9VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,691
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Product details
Overview
SMTY5.0A from STMicroelectronics is a monolithic Transky™ TVS diode integrating transient voltage suppression and low-forward-voltage Schottky functionality in a single SMA (DO-214AC) package. It provides 5 V stand-off voltage, 6.4 V clamping at 10 A (10/1000 µs), 0.48 V forward drop at 1 A, 10 µA leakage at 5 V, and 600 W peak pulse power for ESD protection on 5 V power rails.
For engineers reviewing the SMTY5.0A datasheet, SMTY5.0A pinout, SMTY5.0A application, or SMTY5.0A equivalent, this device serves as a space-optimized, high-energy ESD clamp for IC power rail protection-especially where low forward voltage, fast response, and PCB area reduction are critical.
Technical Context
The SMTY5.0A combines a bidirectional TVS structure with an integrated Schottky diode to deliver simultaneous positive overshoot clamping (6.4 V @ 10 A) and negative spike suppression (–0.48 V clamping), improving upon standard Transil™ devices that clamp at –1 V. Its monolithic architecture eliminates parasitic inductance between discrete components.
Designed for IEC 61000-4-2 Level 4 compliance (15 kV air / 8 kV contact discharge), it operates within a junction temperature range of –65 °C to +150 °C and exhibits a thermal resistance of 120 °C/W (junction-to-ambient on FR4 PCB with recommended pad layout).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 5 V - Maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR min) | 5 V @ 0.5 mA - Confirmed avalanche onset threshold under DC test conditions |
| Clamping Voltage (VCL max) | 6.4 V @ 10 A (10/1000 µs) - Peak voltage seen by protected IC during worst-case ESD event |
| Forward Voltage Drop (VF max) | 0.48 V @ 1 A - Enables low-loss reverse-polarity protection without significant IR drop |
| Leakage Current (IRM) | 10 µA @ 5 V - Minimal standby power loss and signal integrity impact on 5 V rail |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains high-energy transients without degradation |
| Junction-to-Ambient Rth | 120 °C/W - Determines thermal derating on standard FR4 PCB with specified copper pad area |
Pinout & Package
Package: SMA (JEDEC DO-214AC), surface-mount, unidirectional configuration with cathode bar marking. Dimensions per Table 4: D = 2.25–2.95 mm, E = 4.80–5.60 mm, L = 0.75–1.60 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal for forward conduction path | Connects to protected 5 V rail; enables low-VF reverse polarity protection when referenced to ground |
| Cathode | Clamping output / reference node | Connected to system ground; defines clamping reference point for both positive overvoltage and negative spike suppression |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Transil + Schottky integration | Eliminates inter-component trace inductance and saves 62% PCB area vs. discrete dual-device solution |
| Low clamping factor (VCL/VBR) | 1.28 - Tighter voltage margin between breakdown and clamping improves margin for 5 V logic ICs |
| Negative clamping at –0.48 V | Reduces reverse spike amplitude by >50% versus standard Transil (–1 V), protecting sensitive gate oxides |
| JEDEC-registered SMA outline | Ensures mechanical compatibility with automated placement equipment and standard reflow profiles |
| RoHS-compliant ECOPACK® | Lead-free second-level interconnect meets global environmental regulations without solderability compromise |
Applications
| USB Peripheral Power Protection | Automotive Body Control Module (BCM) 5 V Rail |
|---|---|
Use Scenario: Protecting USB-powered sensors and interface ICs from hot-plug ESD and load dump-induced transients. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between VBUS and GND, clamping both positive surges and negative spikes. Use Value: 0.48 V forward drop prevents voltage sag during normal operation; 6.4 V clamping ensures safe margin below 7 V absolute maximum rating of most USB PHYs. | Use Scenario: Safeguarding microcontroller and CAN transceiver power inputs in BCM modules exposed to automotive ESD and battery reversal. IC Role / Device Role / Timing Role: Unidirectional rail protector on 5 V supply line, absorbing ISO 10605 pulses and reverse-battery events. Use Value: –0.48 V clamping limits negative excursions well below –0.3 V typical gate oxide damage threshold of 5 V CMOS ICs. |
| Industrial PLC I/O Module | Consumer Smart Home Hub Power Input |
Use Scenario: Securing 5 V auxiliary supplies feeding isolated ADCs and digital isolators in noisy factory environments. IC Role / Device Role / Timing Role: Primary ESD clamp on board-level 5 V distribution net, upstream of local LDOs and decoupling caps. Use Value: 600 W pulse rating handles repetitive 8 kV contact discharges per IEC 61000-4-2 without parameter drift or failure. | Use Scenario: Protecting SoC and PMIC inputs in compact smart home hubs subject to user-handling ESD during plug-in events. IC Role / Device Role / Timing Role: Space-constrained monolithic clamp replacing discrete TVS + Schottky pair on dense 4-layer PCB. Use Value: SMA footprint reduces total protection area by 62%, enabling smaller form factor while maintaining 15 kV air discharge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS + Schottky integrated protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ5.0A | Standard unidirectional TVS only; no integrated Schottky; 7.0 V clamping @ 10 A; higher VF not specified | Lacks negative-spike suppression capability; requires external Schottky for reverse polarity protection | Select when only positive transient suppression is needed and board space allows discrete implementation |
| P6SMB5.0A | Lower PPP (600 W same), but 7.2 V clamping @ 10 A; no Schottky integration; 100 µA leakage @ 5 V | Higher clamping voltage reduces safety margin for 5 V logic; higher leakage increases standby current | Choose only if cost sensitivity outweighs performance and space constraints |
Compared with SMCJ5.0A and P6SMB5.0A, the SMTY5.0A uniquely delivers combined positive/negative clamping and low forward voltage in one device-enabling smaller footprints, tighter voltage margins, and simplified BOMs for 5 V rail protection.
Availability
SMTY5.0A is available at Aetrix Electronics and suitable for USB peripheral designs, automotive body control modules, industrial PLC I/O modules, and consumer smart home hub power inputs requiring stable component supply and long-term lifecycle support.
Supply support for SMTY5.0A 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, MCU, power, and protection devices for industrial, automotive, and consumer markets.
The Transky™ product line was developed specifically to replace discrete TVS + Schottky combinations in space-constrained, high-reliability power rail protection applications-emphasizing low clamping, fast response, and monolithic integration.
FAQ
Is SMTY5.0A bidirectional or unidirectional?
SMTY5.0A is unidirectional. Its cathode bar marking and electrical characteristics-including asymmetric clamping (6.4 V positive, –0.48 V negative)-confirm operation with anode tied to the protected rail and cathode to ground. It does not conduct in reverse bias beyond the specified negative clamping region.
What is the maximum peak pulse current (IPP) the SMTY5.0A can handle?
The SMTY5.0A supports up to 43.5 A peak pulse current under 10/1000 µs waveform conditions, as verified by its 600 W PPP rating and 6.4 V clamping voltage (600 W ÷ 6.4 V ≈ 94 A theoretical, but datasheet specifies 43.5 A at VCL = 6.4 V). This value is confirmed in Table 3 and Figure 9.
Can SMTY5.0A be used on a 3.3 V rail?
No. Its 5 V stand-off voltage and 5 V breakdown threshold make it unsuitable for 3.3 V systems. Clamping begins near 5 V, risking premature conduction and excessive leakage. For 3.3 V rails, ST offers dedicated variants like SMTY3.3A, which has 3.3 V VRM and lower VCL.
Does SMTY5.0A meet automotive qualification standards?
SMTY5.0A is not AEC-Q200 qualified. While it meets IEC 61000-4-2 Level 4 ESD requirements and operates from –65 °C to +150 °C, it lacks automotive-specific stress testing (e.g., temperature cycling, humidity bias). Use only in non-safety-critical automotive subsystems unless validated per OEM requirements.
SMTY5.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMTY, Transky™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMTY5.0A FAQ
1.How can I place an order for SMTY5.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMTY5.0A 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 SMTY5.0A reliable?
The price and inventory of SMTY5.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMTY5.0A is usually 5 days.
3.What payment methods are accepted for SMTY5.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMTY5.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMTY5.0A?
SMTY5.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMTY5.0A 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 SMTY5.0A?
For technical support, including SMTY5.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMTY5.0A requirements.
6.How does Aetrix verify that SMTY5.0A is sourced from the original manufacturer or authorized distributors?
All SMTY5.0A 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 SMTY5.0A meets industry standards.
7.What is the process for return or replacement of SMTY5.0A?
All SMTY5.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMTY5.0A, 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 SMTY5.0A part is unused and in its original packaging.
Return procedure for SMTY5.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMTY5.0A Tags
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