SM6F22AY STMicroelectronics TVS Diode (Uni-directional) (Other) In Stock
STMicroelectronics SM6F22AY is an automotive-grade 600 W unidirectional TVS diode with 22 V standoff voltage and 48.3 V maximum clamping voltage in a compact SOD128 Flat package. Designed for AEC-Q101 automotive transient suppression applications. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SM6F22AY Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- Price
- From $0.1370(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 dissipation at 10/1000 µs waveform with 22 V standoff voltage for robust automotive transient protection on 12 V and 24 V bus lines
- Maximum clamping voltage of 48.3 V at peak pulse current protects sensitive ECU circuits from ISO 7637-2 load dump and inductive switching transients
- AEC-Q101 automotive qualification in SOD128 Flat package enables use in under-hood and body electronics meeting stringent automotive reliability standards
Applications
The SM6F22AY is designed to protect automotive electronic control units, motor drivers, and sensor interface circuits from transient overvoltage events on 12 V and 24 V vehicle bus lines, including ISO 7637-2 load dump pulses and inductive switching spikes. It is widely used in body control modules, ADAS sensor power supply lines, and 24 V truck electrical systems where a 600 W capable TVS in a 2-pin SOD128 Flat footprint fits within space-constrained PCB layouts. The 22 V standoff voltage ensures the diode remains non-conducting during normal battery voltage variations while activating below the breakdown threshold of downstream ICs.
Specifications
| Factory Lead Time | 25Weeks |
| YTEOL | 7.63 |
| Breakdown Voltage-Max | 27V |
| Breakdown Voltage-Min | 24.4V |
| Breakdown Voltage-Nom | 25.7V |
| Clamping Voltage-Max | 48.3V |
| 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 | 22V |
| Reverse Current-Max | 0.2 µA |
| Reverse Test Voltage | 22V |
| 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
What standoff and clamping voltages does SM6F22AY provide for 12 V automotive bus protection?
The SM6F22AY has a 22 V standoff voltage (VRWM) and clamps at a maximum of 48.3 V under peak pulse current, with a nominal breakdown voltage of 25.7 V. On a 12 V automotive bus, battery voltage with alternator charging reaches up to 16 V, well below the 22 V standoff, ensuring the TVS remains dormant under normal conditions while activating against transient spikes above 24.4 V that would otherwise damage ECU input stages rated at 40 V maximum.
How much peak pulse power can SM6F22AY absorb and for which transient standards is it qualified?
The SM6F22AY absorbs 600 W peak pulse power at the standard 10/1000 µs test waveform defined in IEC 61000-4-5 and ISO 7637-2. This level of pulse energy covers ISO 7637-2 pulses 1, 2a, and 2b encountered in 12 V and 24 V vehicle power systems, as well as 500 W load dump pulses generated when alternator field collapse drives bus voltage above 40 V during battery disconnection.
Is SM6F22AY suitable for protecting a 24 V commercial truck ECU from load dump transients?
Yes, the SM6F22AY is suited for 24 V truck bus protection. The 22 V standoff voltage accommodates the 24 V nominal rail only when placed in series with a current-limiting resistor or after a supply regulator that drops the input below 22 V. Alternatively, ST offers the SM6F36AY with a 36 V standoff for direct 24 V bus connection, so designers must select the part matching their actual bus voltage and maximum continuous operating level within the breakdown voltage range of 24.4 V to 27 V.
How does the SOD128 Flat package of SM6F22AY affect PCB layout in a compact automotive module?
The SOD128 Flat package measures approximately 3.8 x 2.6 mm with a flat 2-pin footprint and 0.8 mm package height, enabling placement in low-profile automotive modules with under 1 mm vertical clearance. Its SMD pads allow reflow soldering with automated pick-and-place at high production volumes, and the flat thermal pad transfers heat to the PCB copper pour, supporting the full 600 W peak pulse rating with at least 1 cm² of 35 µm copper ground plane.
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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+ | $0.3600 | $3.60 |
| 100+ | $0.2500 | $25.00 |
| 250+ | $0.2420 | $60.50 |
| 500+ | $0.1900 | $95.00 |
| 1000+ | $0.1494 | $149.40 |
| 6000+ | $0.1370 | $822.00 |
In Stock · 24h Response · Worldwide Shipping
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