My Inquiry
My Account
STMicroelectronics SMA6F10AY
;;2.jpg)
- Part No.:
- SMA6F10AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F10AY.pdf
- Description:
- TVS DIODE 10VWM 17VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,294
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F10AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMA Flat package, designed to clamp transient overvoltages up to 17 V (VCL = 17 V at 10/1000 µs, IPP = 37 A), with stand-off voltage VRM = 10 V, peak pulse power PPP = 600 W (10/1000 µs), and low leakage current (0.2 µA @ 25 °C). It protects LIN bus, body control modules, and sensor interfaces against ISO 7637-2 pulses and ISO 10605 ESD.
For engineers reviewing the SMA6F10AY datasheet, SMA6F10AY pinout, SMA6F10AY application, or SMA6F10AY equivalent, this device is selected for automotive circuit protection where high junction temperature operation (Tj max = 175 °C), flat 1 mm profile, and compliance with IEC 61000-4-2 level 4 (±30 kV contact/air) are critical design requirements.
Technical Context
This TVS diode uses planar silicon technology to achieve low dynamic resistance (RD = 0.127 Ω) and stable clamping performance across temperature. Its unidirectional configuration enables asymmetric surge suppression on DC-biased lines such as 12 V automotive power rails.
The device meets ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), and Pulse 3b (+150 V) requirements for 12 V battery systems. Clamping voltage rises linearly with temperature via αT = 7.8 × 10−4/°C, enabling accurate system-level overvoltage margining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 10 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum system DC bias compatibility. |
| VBR min / typ / max | 11.1 / 11.7 / 12.3 V - Breakdown voltage range at IR = 1 mA; defines precise turn-on threshold for transient suppression. |
| VCL (10/1000 µs) | 17 V - Clamped voltage at 37 A peak pulse; determines maximum stress on downstream ICs during load dump. |
| IPP (10/1000 µs) | 37 A - Peak pulse current capability at 600 W; supports robust protection against ISO 7637-2 Pulse 1 and Pulse 3a. |
| IR @ 25 °C / 85 °C | 0.2 µA / 1 µA - Reverse leakage current; ensures minimal power loss and signal integrity in always-on automotive circuits. |
| Tj max | 175 °C - Maximum junction temperature; enables reliable operation under hood-mounted conditions without derating. |
| Package | SMA Flat (JEDEC DO-214AC) - 2.25–2.90 mm × 5.00–5.35 mm × 1.10 mm; compatible with automated SMT assembly and space-constrained PCB layouts. |
Pinout & Package
SMA6F10AY uses the standard SMA Flat (DO-214AC) surface-mount package: cathode-marked single-ended two-terminal construction with 2.25–2.90 mm length, 5.00–5.35 mm width, and 1.10 mm height. The flat profile enables low-profile mounting and thermal coupling to copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to signal/power line requiring transient clamping; forms forward path during negative surges (Pulse 1, 3a). |
| Cathode | High-side connection to reference rail (e.g., battery +) | Connected to 12 V supply or ground return; defines clamping polarity and establishes VRM standoff level. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| Flat 1 mm profile | Enables placement in tight clearance zones (e.g., near connectors or stacked PCBs) without interfering with mating components. |
| ISO 10605 ESD immunity | Withstands ±30 kV contact and air discharge (C = 150 pF / R = 330 Ω and C = 330 pF / R = 330 Ω), exceeding level 4 requirements. |
| Dynamic resistance RD | 0.127 Ω - Low impedance limits VCL rise under high-current transients, preserving voltage margin for downstream ICs. |
| UL94 V0 flammability rating | Ensures flame-retardant epoxy molding compound compliance for safety-critical vehicle interior and powertrain applications. |
Applications
| Body Control Module (BCM) | LIN Bus Node Protection |
|---|---|
|
Use Scenario: Protects microcontroller I/O and power inputs in door modules, seat controllers, and lighting units exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between 12 V supply and ground, limiting transients to ≤17 V during ISO 7637-2 Pulse 1 (−150 V) and Pulse 3b (+150 V). Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic supplies by maintaining safe voltage margins below IC absolute maximum ratings. |
Use Scenario: Shields LIN transceivers and slave nodes from ESD and coupled noise on shared bus wiring harnesses. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN line and ground, responding within <1 ns to suppress ±30 kV ESD events per ISO 10605. Use Value: Maintains bus signal integrity by limiting clamping overshoot to 17 V while drawing only 0.2 µA leakage at ambient temperature. |
| Engine Control Unit (ECU) Sensor Interface | Automotive Camera Power Input |
|
Use Scenario: Safeguards analog sensor front-ends (e.g., pressure, temperature) connected to 5 V regulated supply derived from 12 V battery. IC Role / Device Role / Timing Role: Placed upstream of LDO input to absorb ISO 7637-2 Pulse 2a (+112 V) induced by alternator switching transients. Use Value: Limits peak voltage seen by LDO to 17 V, avoiding dropout or internal overvoltage failure during engine cranking. |
Use Scenario: Protects 12 V input of rear-view or surround-view cameras mounted in bumpers or mirrors subject to repeated ESD exposure. IC Role / Device Role / Timing Role: Unidirectional TVS installed between camera power input and chassis ground, rated for Tj = 175 °C operation in sealed enclosures. Use Value: Ensures long-term reliability by sustaining 0.2 µA leakage at 25 °C and 1 µA at 85 °C-critical for low-power always-on imaging systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Lower PPP = 400 W (10/1000 µs); VCL = 16.7 V at 32.4 A; non-AEC-Q101 qualified. | Not suitable for production automotive ECUs; acceptable for industrial or consumer-grade 12 V systems. | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive qualification needs. |
| SMA6F10A | Same electrical specs but non-flat SMA package (DO-214AC, height 2.3 mm); lacks UL94 V0 and J-STD-020 MSL level 1 rating. | Higher profile limits use in ultra-thin modules; no flammability or moisture sensitivity assurance for reflow. | Choose only if legacy board layout prohibits flat-package footprint or if UL94/J-STD-020 compliance is not mandated. |
Compared with SMAJ10A and SMA6F10A, SMA6F10AY delivers verified automotive qualification, lower profile (1 mm vs. 2.3 mm), and guaranteed flammability/solderability compliance-making it the sole choice for new AEC-Q101-compliant designs requiring space-constrained, high-reliability transient suppression.
Availability
SMA6F10AY is available at Aetrix Electronics and suitable for automotive body electronics, LIN bus networks, engine control unit sensor interfaces, and camera power inputs requiring stable component supply across extended temperature and lifecycle demands.
Supply support for SMA6F10AY 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 automotive, industrial, and power management solutions with vertical manufacturing and application-focused R&D.
SMA6FxxAY belongs to ST's Transil™ automotive TVS family, engineered specifically for ISO 7637-2 and ISO 10605 compliance in 12 V vehicle architectures-emphasizing high-temperature reliability, low leakage, and flat packaging for next-generation ADAS and electrification systems.
FAQ
What is the maximum clamping voltage of SMA6F10AY under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 17 V at IPP = 37 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases with junction temperature at a coefficient of 7.8 × 10−4/°C, reaching approximately 18.2 V at Tj = 125 °C.
Is SMA6F10AY suitable for protecting CAN FD interfaces?
No. SMA6F10AY is unidirectional with VRM = 10 V and clamps only negative transients on biased lines; CAN FD requires bidirectional protection with symmetric ±5 V standoff and low capacitance (<100 pF) to avoid signal distortion-neither of which this device provides.
Does SMA6F10AY require heatsinking for 600 W pulse handling?
No external heatsink is needed for single-pulse events. Its thermal impedance (Zth(j-a)) is 100 °C/W for short pulses on recommended FR4 footprint, and the 600 W rating applies at Tj initial = 25 °C. Continuous power dissipation remains limited to ~0.5 W due to low duty cycle of automotive transients.
How does the marking "6ASY" correspond to SMA6F10AY?
"6ASY" is the top-side laser marking per Table 6 of DS12477 Rev 3: "6A" denotes the SMA6F series, "S" indicates VRM = 10 V, "Y" specifies unidirectional A-type construction. This marking is consistent across reel packaging and matches ST's official ordering code scheme.
SMA6F10AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 37A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAflat
SMA6F10AY FAQ
1.How can I place an order for SMA6F10AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F10AY 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 SMA6F10AY reliable?
The price and inventory of SMA6F10AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F10AY is usually 5 days.
3.What payment methods are accepted for SMA6F10AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F10AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F10AY?
SMA6F10AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F10AY 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 SMA6F10AY?
For technical support, including SMA6F10AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F10AY requirements.
6.How does Aetrix verify that SMA6F10AY is sourced from the original manufacturer or authorized distributors?
All SMA6F10AY 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 SMA6F10AY meets industry standards.
7.What is the process for return or replacement of SMA6F10AY?
All SMA6F10AY units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F10AY, 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 SMA6F10AY part is unused and in its original packaging.
Return procedure for SMA6F10AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F10AY Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
