SMA6T14AY STMicroelectronics TVS Diode (Uni-directional) (Diodes Moulded) In Stock
STMicroelectronics SMA6T14AY is an automotive-grade, unidirectional 600 W TVS diode with a 14 V nominal breakdown voltage and 23.5 V maximum clamping voltage in an SMA package. Features low leakage current, AEC-Q101 automotive qualification, and silicon transient suppression. Available from authorized distributors with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Diodes Moulded
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SMA6T14AY Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- Price
- From $0.1100(MOQ 10)
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 600 W peak pulse power handling at 14 V nominal breakdown protects automotive electronics from inductive load transients on 12 V battery rails
- Maximum clamping voltage of 23.5 V keeps protected circuit voltages safely below typical 28 V load-dump limits in 12 V automotive systems
- AEC-Q101 automotive qualification with low leakage current ensures reliable operation across -40°C to +150°C junction temperature range in harsh underhood environments
Applications
The SMA6T14AY is designed for transient overvoltage protection on 12 V automotive power lines, safeguarding ECU power inputs, CAN bus transceivers, and LIN interface ICs from load-dump transients that can reach 40 V on a standard 12 V battery bus. Its 600 W peak pulse power rating and fast response make it suitable for placement directly on supply pins of automotive body control modules, door control units, and ADAS sensor power rails. The compact SMA package allows it to fit alongside other protection devices on space-constrained automotive PCBs without requiring a bulky through-hole TVS component.
Specifications
| Factory Lead Time | 53 Weeks, 1 Day |
| YTEOL | 7.46 |
| Additional Feature | LOW LEAKAGE CURRENT |
| Breakdown Voltage-Max | 14.7V |
| Breakdown Voltage-Min | 13.3V |
| Breakdown Voltage-Nom | 14V |
| Clamping Voltage-Max | 23.5V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JEDEC-95 Code | DO-214AC |
| JESD-30 Code | R-PDSO-C2 |
| JESD-609 Code | e3 |
| Non-rep Peak Rev Power Dis-Max | 600W |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | UNIDIRECTIONAL |
| Reference Standard | AEC-Q101; IEC-61000-4-2; ISO 10605; MIL-STD-750 |
| Rep Pk Reverse Voltage-Max | 12V |
| Reverse Current-Max | 0.2 µA |
| Reverse Test Voltage | 12V |
| Surface Mount | YES |
| Technology | AVALANCHE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | C BEND |
| Terminal Position | DUAL |
| Package | Diodes Moulded |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What peak pulse power and clamping voltage does the SMA6T14AY provide for 12 V automotive load-dump protection?
The SMA6T14AY handles 600 W of peak pulse power with a maximum clamping voltage of 23.5 V when conducting transient surge currents. On a standard 12 V automotive battery rail, load-dump transients can spike to 40 V or higher for several hundred milliseconds; the SMA6T14AY clamps those transients to below 23.5 V, keeping the protected ECU or transceiver IC well within its absolute maximum ratings.
Over what temperature range is the SMA6T14AY specified, and how does its automotive qualification affect component selection for underhood modules?
The SMA6T14AY is qualified to AEC-Q101 standards with a junction temperature range of -40°C to +150°C, covering the full underhood thermal environment of passenger cars and light trucks. Automotive engineers selecting protection devices for engine control units, transmission controllers, or electric power steering modules can directly cite the AEC-Q101 Grade 1 qualification in their DFMEA documentation without additional component-level qualification testing, reducing time-to-market by weeks.
How does the 14 V nominal breakdown voltage of the SMA6T14AY make it suitable for a 12 V battery-bus protection scheme?
On a 12 V lead-acid or lithium automotive battery bus, the operating voltage can reach 14.4 V during active charging. The SMA6T14AY's 13.3 V to 14.7 V breakdown voltage band ensures the device remains non-conducting during normal 12 V to 14.4 V charging conditions, preventing unnecessary power dissipation, while instantly clamping any surge above the breakdown threshold to protect downstream ICs. This tight 1.4 V breakdown window avoids the false-triggering issues common with wider-tolerance TVS devices.
For a compact automotive PCB, what advantage does the SMA package of the SMA6T14AY offer compared to a DO-214AA through-hole TVS?
The SMA package (DO-214AC) is a surface-mount device with a body footprint of approximately 4.4 mm x 2.7 mm, enabling reflow soldering in automated SMT assembly lines and eliminating the wave-soldering step required for through-hole DO-214AA components. This reduces assembly cost by 15–20 % on high-volume automotive PCBs and allows the TVS diode to be placed within 5 mm of the protected IC pin, minimising the parasitic inductance in the surge current loop and improving clamping effectiveness during fast transients.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.7500 | $7.50 |
| 100+ | $0.4900 | $49.00 |
| 500+ | $0.3800 | $190.00 |
| 1000+ | $0.3497 | $349.65 |
| 2000+ | $0.3192 | $638.38 |
| 5000+ | $0.1100 | $550.00 |
In Stock · 24h Response · Worldwide Shipping
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