My Inquiry
My Account
STMicroelectronics SMB6F6.0AY
- Part No.:
- SMB6F6.0AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F6.0AY.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB6F6.0AY from STMicroelectronics is an AEC-Q101-qualified unidirectional 600 W transient voltage suppressor (TVS) diode designed for automotive power line protection. It features a stand-off voltage of 6.0 V, clamping voltage of 10.3 V at 61 A (10/1000 µs), and operates up to 175 °C junction temperature - enabling robust surge suppression in 12 V battery systems against ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), and ISO 10605 ESD events.
For engineers reviewing the SMB6F6.0AY datasheet, SMB6F6.0AY pinout, SMB6F6.0AY application, or SMB6F6.0AY equivalent, this device is selected for high-reliability automotive circuit protection where low leakage (≤0.2 μA @ 25 °C), flat SMB package compatibility with automated assembly, and validated compliance to 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 (0.048 Ω) and stable clamping performance across temperature (αT = 5.9 × 10−4/°C). Its unidirectional configuration provides asymmetrical surge handling optimized for DC-biased automotive lines, with reverse standoff voltage tightly specified at 6.0 V (min 6.7 V, max 7.4 V).
The device delivers 600 W peak pulse power under 10/1000 µs waveform at 25 °C ambient, de-rating to 470 W at Tj = 175 °C. It meets J-STD-020 MSL Level 1, IPC7531 footprint, and JEDEC registered SMB Flat outline - ensuring compatibility with standard reflow profiles and PCB layout practices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 6.0 V - Maximum continuous reverse operating voltage before conduction begins; matches 12 V automotive system bias with safety margin. |
| Breakdown Voltage (VBR) | 6.7–7.4 V @ 1 mA - Tight tolerance ensures predictable turn-on during transients without false triggering. |
| Clamping Voltage (VCL) | 10.3 V @ 61 A (10/1000 µs) - Limits downstream IC voltage stress during ISO 7637-2 Pulse 1/2a/3b surges. |
| Peak Pulse Power (PPP) | 600 W @ 10/1000 µs - Sustains high-energy transients common in vehicle load-dump and inductive switching events. |
| Leakage Current (IR) | 0.2 μA @ 25 °C, 1 μA @ 85 °C - Minimizes standby power loss and avoids false resets in always-on modules. |
| Junction Temperature Range | −55 to +175 °C - Enables placement near hot engine control units or under-hood ECUs without derating. |
| Package | SMB Flat (JEDEC DO-214AA) - 1 mm profile supports compact layouts; matte tin leads ensure solderability per J-STD-002/E3. |
Pinout & Package
SMB6F6.0AY is housed in an SMB Flat (DO-214AA) surface-mount package measuring 3.95 mm × 5.60 mm × 1.10 mm (L × W × H), with a 1 mm maximum height for low-profile board integration. The package features two terminals: cathode (marked band) and anode, mounted on a standardized IPC7531-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts transient energy to ground when VREV exceeds VRWM. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock per JESD22 standards. |
| ISO 7637-2 compliance | Withstands −150 V (Pulse 1), +112 V (Pulse 2a), and ±150/220 V (Pulses 3a/3b) without degradation in 12 V systems. |
| IEC 61000-4-2 / ISO 10605 ESD rating | Passes ±30 kV air/contact discharge (C = 150 pF/R = 330 Ω and C = 330 pF/R = 330 Ω), exceeding Level 4 requirements. |
| Low dynamic resistance | 0.048 Ω enables tighter clamping and reduced voltage overshoot during fast-rising transients (e.g., relay bounce). |
| High-temperature operation | Rated for continuous operation at Tj = 175 °C - supports placement in proximity to power MOSFETs or DC-DC converters. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from battery line transients during ignition and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping surges before they reach 5 V/3.3 V LDOs and MCU power domains. Use Value: Prevents latch-up and permanent damage to 32-bit automotive MCUs by limiting VIN to ≤10.3 V during 61 A transients. |
Use Scenario: Safeguarding fuel injector drivers and crankshaft position sensor interfaces against inductive kickback and alternator ripple. IC Role / Device Role / Timing Role: Parallel-connected TVS on switched 12 V outputs, absorbing energy from coil de-energization pulses (ISO 7637-2 Pulse 1/2a). Use Value: Maintains signal integrity on analog sensor inputs by suppressing >100 V spikes within 1 ns response time, avoiding ADC offset errors. |
| Infotainment Power Supply | ADAS Camera Module |
Use Scenario: Shielding USB-C PD controllers and display power rails from ESD events during user interaction and connector mating. IC Role / Device Role / Timing Role: Input-side TVS on 5 V/9 V/12 V input stage, shunting ±30 kV ESD strikes directly to chassis ground. Use Value: Eliminates need for secondary filtering stages by achieving full IEC 61000-4-2 Level 4 immunity with single-device protection. |
Use Scenario: Securing Fakra coaxial power and video lines in rear-view cameras exposed to door slam transients and antenna coupling. IC Role / Device Role / Timing Role: Bidirectional-capable placement (anode grounded, cathode on line) for differential surge suppression on 12 V bias feed. Use Value: Ensures uninterrupted video stream during ±150 V ISO 7637-2 Pulse 3b events by clamping within 100 ps and dissipating 470 W at 175 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A | Same SMB package but rated for 600 W (10/1000 µs); VBR = 6.67–7.37 V; VCL = 10.3 V @ 58.1 A; non-AEC-Q101 qualified. | Lacks automotive qualification; suitable for industrial/commercial 12 V systems without AEC validation requirements. | Select when cost sensitivity outweighs automotive qualification needs and ISO 7637-2 testing is not mandated. |
| SMCJ6.0A | Higher-power SMC package (1500 W); same VRWM and VCL; larger footprint (7.11 × 6.22 mm); Tj max = 175 °C. | Used where higher surge margin is required (e.g., alternator output lines), but incompatible with space-constrained SMB footprints. | Choose only if board layout allows SMC package and system-level surge energy exceeds 600 W capability. |
Compared with SMBJ6.0A and SMCJ6.0A, SMB6F6.0AY uniquely combines AEC-Q101 qualification, SMB footprint, and verified ISO 7637-2 Pulse 1/2a/3b performance - making it the only drop-in solution for production automotive ECUs requiring both space efficiency and full automotive compliance.
Availability
SMB6F6.0AY is available at Aetrix Electronics and suitable for body control modules, engine control units, infotainment power supplies, and ADAS camera modules requiring stable component supply across automotive production lifecycles.
Supply support for SMB6F6.0AY 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 capabilities and broad IP portfolio.
SMB6F6.0AY belongs to ST's automotive-grade TVS diode product line, engineered specifically for robust electromagnetic immunity in harsh vehicle environments - targeting ISO 7637-2, ISO 10605, and IEC 61000-4-x compliance in safety-critical electronic control units.
FAQ
What is the maximum clamping voltage of SMB6F6.0AY under a 10/1000 µs surge?
The maximum clamping voltage is 10.3 V at 61 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases with junction temperature at a coefficient of 5.9 × 10−4/°C, reaching approximately 11.1 V at Tj = 175 °C per the VCL vs. Tj formula in DS12412.
Is SMB6F6.0AY compatible with lead-free reflow soldering processes?
Yes - it complies with J-STD-020 MSL Level 1 and supports ST's recommended reflow profile: peak temperature 240–245 °C for 60–90 seconds, with ramp rates ≤3 °C/s. Matte tin plating meets JESD 22-B102 E3 and MIL-STD-750 Method 2026 solderability requirements.
How does SMB6F6.0AY differ from generic SMBJ6.0A in automotive use?
SMB6F6.0AY is AEC-Q101 qualified with full test reports for temperature cycling, humidity, and mechanical shock - while SMBJ6.0A lacks this validation. It also demonstrates verified performance against ISO 7637-2 Pulse 1/2a/3b and ISO 10605 ±30 kV, which are mandatory for Tier 1 automotive suppliers.
Can SMB6F6.0AY be used in bidirectional configurations?
No - it is a unidirectional TVS diode intended for DC-biased lines. For bidirectional protection (e.g., data lines), ST recommends the SMB6F6.0CA variant. Using SMB6F6.0AY in reverse-biased mode risks permanent breakdown due to its asymmetric structure and lack of forward surge rating.
SMB6F6.0AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 61A
- 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:
- SMBflat
SMB6F6.0AY FAQ
1.How can I place an order for SMB6F6.0AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F6.0AY 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 SMB6F6.0AY reliable?
The price and inventory of SMB6F6.0AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F6.0AY is usually 5 days.
3.What payment methods are accepted for SMB6F6.0AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F6.0AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F6.0AY?
SMB6F6.0AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F6.0AY 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 SMB6F6.0AY?
For technical support, including SMB6F6.0AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F6.0AY requirements.
6.How does Aetrix verify that SMB6F6.0AY is sourced from the original manufacturer or authorized distributors?
All SMB6F6.0AY 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 SMB6F6.0AY meets industry standards.
7.What is the process for return or replacement of SMB6F6.0AY?
All SMB6F6.0AY units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F6.0AY, 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 SMB6F6.0AY part is unused and in its original packaging.
Return procedure for SMB6F6.0AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB6F6.0AY 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…
