SM6F14AY STMicroelectronics TVS Diode (Uni-directional) (Other) In Stock
SM6F14AY is an automotive-grade unidirectional TVS diode from STMicroelectronics rated at 600 W peak pulse power with a 16.5 V nominal breakdown voltage in a flat SOD128 package. It clamps transients to 29 V maximum, providing robust protection for 12 V automotive power rails and ECU inputs. Available from stock worldwide with fast shipping.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SM6F14AY Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- Price
- From $0.1310(MOQ 10)
- Temp Range
- -55.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 600 W peak pulse power handling in the SOD128 Flat package delivering high-energy load-dump protection in a compact low-profile footprint
- Unidirectional 16.5 V nominal breakdown clamping to 29 V maximum, protecting automotive 12 V bus rails from positive surge events
- Automotive AEC-Q101 qualified with a breakdown voltage tolerance of 15.7 V to 17.3 V ensuring consistent protection across -40 degrees C to +150 degrees C
- SOD128 Flat surface-mount package enabling automated assembly and reducing total board area versus larger axial through-hole TVS alternatives
Applications
The SM6F14AY is designed to protect automotive ECU supply pins, alternator output rails, and 12 V battery-connected circuits from load-dump and inductive switching transients defined in ISO 7637-2 pulse 5a requiring up to 600 W peak energy absorption. Its unidirectional structure is ideal for DC supply rail protection where the polarity of transients is always positive, such as the battery positive rail in body control modules, infotainment units, and telematics control units. The device is also used in industrial 12 V to 24 V power distribution panels where relay-coil back-EMF and capacitor-bank discharge events can inject high-voltage spikes onto supply lines.
Specifications
| Factory Lead Time | 25Weeks |
| YTEOL | 7.63 |
| Breakdown Voltage-Max | 17.3V |
| Breakdown Voltage-Min | 15.7V |
| Breakdown Voltage-Nom | 16.5V |
| Clamping Voltage-Max | 29V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JESD-30 Code | R-PDSO-F2 |
| JESD-609 Code | e3 |
| Non-rep Peak Rev Power Dis-Max | 4000W |
| 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, 4-4 |
| Rep Pk Reverse Voltage-Max | 14V |
| Reverse Current-Max | 0.2 µA |
| Reverse Test Voltage | 14V |
| Surface Mount | YES |
| Technology | AVALANCHE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | FLAT |
| Terminal Position | DUAL |
| Package | Other |
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 | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much peak pulse power can SM6F14AY absorb, and which automotive surge standard does it meet?
SM6F14AY handles 600 W peak pulse power with a 10/1000 µs test waveform, which exceeds the 400 W level required by ISO 7637-2 pulse 5a for standard 12 V automotive load-dump testing. The 600 W rating provides 50% additional headroom above the standard requirement, improving margin for vehicle architectures with larger battery capacitances that generate higher-energy load-dump pulses.
What clamping voltage does SM6F14AY maintain during a transient, and how does that protect a 12 V ECU supply rail?
During a transient event the SM6F14AY clamps the supply rail to a maximum of 29 V, which is well below the 36 V absolute maximum rating common to most automotive ECU input protection circuits designed for 12 V systems. The 29 V clamp ensures that downstream MOSFET gates, microcontroller VCC pins, and linear regulator inputs rated for 30 V or higher remain undamaged even during worst-case alternator-disconnect load-dump events.
Over what breakdown voltage range is SM6F14AY specified, and does the tolerance affect 12 V rail protection design?
The breakdown voltage is specified from 15.7 V minimum to 17.3 V maximum, a 1.6 V tolerance band centred at 16.5 V nominal. This means the TVS begins conducting between 15.7 V and 17.3 V, providing approximately 3.7 V to 5.3 V standoff above the 12 V nominal bus before clamping activates, which is sufficient to prevent false triggering from normal 14.4 V alternator charging voltage.
How does the flat SOD128 package of SM6F14AY compare to a through-hole axial TVS for a high-volume automotive PCB assembly?
The SOD128 Flat package measures approximately 3.7 x 2.7 mm with a 1.0 mm profile, enabling automated SMT pick-and-place at rates above 5,000 components per hour versus 800 to 1,200 components per hour for through-hole axial TVS insertion. The leadless flat package also eliminates the lead-forming and wave-soldering steps, reducing per-unit assembly cost by approximately 2 to 4 seconds of machine time at high-volume automotive production rates.
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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+ | $0.3400 | $3.40 |
| 100+ | $0.2300 | $23.00 |
| 500+ | $0.1800 | $90.00 |
| 6000+ | $0.1490 | $894.00 |
| 9000+ | $0.1380 | $1242.00 |
| 24000+ | $0.1310 | $3144.00 |
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