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STMicroelectronics SMB6F100AY
- Part No.:
- SMB6F100AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F100AY.pdf
- Description:
- TVS DIODE 100VWM 162VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,970
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Product details
Overview
SMB6F100AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMB Flat package, designed to clamp transient overvoltages up to 162 V (clamping voltage at 3.8 A, 10/1000 µs) while sustaining 600 W peak pulse power and operating up to 175 °C junction temperature. It protects CAN, LIN, and sensor interfaces in 12 V/24 V vehicle systems against ISO 7637-2 pulses (Pulse 1: −150 V; Pulse 2a: +112 V; Pulse 3a: −220 V; Pulse 3b: +150 V) and exceeds ISO 10605 ESD immunity (±30 kV air/contact discharge).
For engineers reviewing the SMB6F100AY datasheet, SMB6F100AY pinout, SMB6F100AY application, or SMB6F100AY equivalent, this page delivers verified electrical characteristics, automotive-grade reliability data, thermal derating curves, footprint compliance (IPC7531), and direct comparison with functionally aligned alternatives for surge protection design in engine control units, body electronics, and ADAS power domains.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage (0.2 μA at 25 °C, 1 μA at 85 °C) and stable clamping performance across −55 °C to +175 °C junction temperature range. Its dynamic resistance of 4.68 Ω at 10/1000 µs enables precise voltage limiting during fast transients like ISO 7637-2 Pulse 3b (+150 V).
The device complies with J-STD-020 MSL Level 1, JEDEC registered SMB Flat outline, and IEC 61000-4-4 Level 4 (±4 kV), supporting reflow soldering per ST's ECOPACK® profile (peak 240–245 °C). Its 1 mm profile and matte tin-plated leads meet automotive mechanical and solderability standards including MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 100 V - Maximum continuous reverse working voltage before breakdown; sets minimum system operating margin for 12 V/24 V automotive rails. |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - Confirmed min/typ/max range ensures reliable triggering above nominal bus voltage without false conduction. |
| Clamping Voltage (VCL) | 162 V at 3.8 A (10/1000 µs) - Limits transient energy delivered to downstream ICs; validated per ISO 7637-2 Pulse 1 & 3a stress profiles. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains high-energy surges typical of load dump and inductive switching in engine bay environments. |
| Leakage Current (IRM) | 0.2 μA at 25 °C - Minimizes standby power loss in always-on modules such as telematics and gateway ECUs. |
| Junction Temperature (Tj max) | 175 °C - Enables placement near heat sources (e.g., power inverters, motor drivers) without thermal derating penalties. |
| ESD Rating | ±30 kV (ISO 10605, C = 330 pF/R = 330 Ω) - Exceeds Level 4 for robust handling in assembly and field service conditions. |
Pinout & Package
SMB6F100AY is housed in a flat, surface-mount SMB Flat package (JEDEC MO-213AA), measuring 3.30–3.95 mm × 5.20–5.60 mm × 0.90–1.10 mm height, with 2 terminals optimized for high-current surge paths and minimal PCB footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Surge Current Sink | Connected to protected line (e.g., CAN_H); conducts transient current to ground during overvoltage events. |
| Anode | Reference Node | Connected to system ground or low-impedance return path; completes clamping loop with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Low dynamic resistance (RD) | 4.68 Ω at 10/1000 µs - Reduces clamping voltage overshoot during fast transients, improving protection margin for 5 V logic interfaces. |
| High-temperature operation | Rated to 175 °C junction - Eliminates need for thermal derating in compact ECU designs where ambient exceeds 125 °C. |
| Flat 1 mm profile | Enables placement beneath connectors or in tight board-to-board spacing without mechanical interference or height clearance issues. |
| Matte tin lead finish | Complies with J-STD-002, JESD22-B102 E3, and MIL-STD-750 Method 2026 - Ensures solder joint integrity and whisker resistance in long-life automotive applications. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protects fuel injector driver outputs and crankshaft position sensor inputs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping element placed directly at connector entry point to limit transients before reaching MCU GPIO or analog front-end. Use Value: Clamps ISO 7637-2 Pulse 1 (−150 V) to ≤162 V, preventing latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and Hall-effect sensors. |
Use Scenario: Shields LIN bus transceivers and door lock actuator drivers from battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN signal line (VRM = 100 V) with fast response (<1 ns) to suppress ESD events during service access. Use Value: Withstands ±30 kV contact discharge (ISO 10605) and limits clamping voltage to 162 V at 3.8 A, preserving transceiver integrity during dealership diagnostics. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Power Supply |
|
Use Scenario: Safeguards radar module power input against ISO 7637-2 Pulse 3b (+150 V) induced by DC-DC converter switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of buck converters, sized for 600 W peak dissipation. Use Value: Maintains 162 V clamping at 175 °C junction temperature-critical for radar modules mounted near hot exhaust manifolds. |
Use Scenario: Guards USB-C PD controller supply lines in head unit against hot-plug transients and ESD during user insertion. IC Role / Device Role / Timing Role: Low-leakage (0.2 μA) unidirectional TVS on 5 V/9 V/15 V PD rails to avoid quiescent current impact on battery runtime. Use Value: Delivers 162 V clamping at 3.8 A while adding <0.5 μA total leakage-enabling always-on infotainment wake-up without battery drain penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A | Same SMB package, but rated for 600 W (10/1000 µs) and 100 V VRM; clamping voltage 165 V at 3.8 A - 3 V higher than SMB6F100AY. | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select when automotive qualification is not required and minor clamping voltage increase is acceptable. |
| SMCJ100A | Larger SMC package (7.11 × 6.22 mm), 1500 W rating, same 100 V VRM; clamping voltage 165 V at 9.2 A. | Higher power handling but incompatible footprint; requires PCB redesign and larger keep-out area. | Choose only if system-level surge energy exceeds 600 W and board space permits SMC layout. |
Compared with SMBJ100A and SMCJ100A, SMB6F100AY uniquely combines AEC-Q101 qualification, 1 mm profile, and 162 V clamping in SMB Flat-making it the only drop-in solution for space-constrained, thermally demanding automotive modules requiring certified reliability.
Availability
SMB6F100AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS radar power supplies, and infotainment USB-C PD protection requiring stable component supply across extended automotive production lifecycles.
Supply support for SMB6F100AY 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 broad IP portfolio.
SMB6F100AY belongs to the SMB6FxxAY series-a family of AEC-Q101-qualified planar TVS diodes engineered specifically for ISO 7637-2 and ISO 10605 compliance in automotive power and signal lines.
FAQ
What is the maximum clamping voltage of SMB6F100AY under ISO 7637-2 Pulse 1 conditions?
The SMB6F100AY clamps to 162 V at 3.8 A for a 10/1000 µs waveform, which directly corresponds to ISO 7637-2 Pulse 1 (−150 V test condition). This value is measured at Tj = 25 °C and remains within 5% tolerance up to 175 °C junction temperature due to its low αT coefficient (10.7 × 10⁻⁴/°C).
Can SMB6F100AY be used in bidirectional configurations?
No-SMB6F100AY is unidirectional only, with cathode marking indicating polarity-sensitive installation. For bidirectional protection (e.g., AC lines or differential buses), ST offers the SMB6F100CA variant; using SMB6F100AY in reverse-biased mode risks permanent breakdown above 100 V standoff.
How does SMB6F100AY's 1 mm height impact PCB layout in dense automotive modules?
The 0.90–1.10 mm height allows placement beneath low-profile connectors (e.g., FAKRA, USCAR), under shield cans, or in stacked multi-layer boards without violating Z-axis clearance rules. Its IPC7531-compliant footprint also supports automated optical inspection and reduces solder bridging risk in fine-pitch routing.
Is SMB6F100AY compatible with lead-free reflow processes?
Yes-SMB6F100AY uses matte tin-plated leads qualified to J-STD-020 MSL Level 1 and supports ST's recommended reflow profile: peak temperature 240–245 °C for ≤60 seconds, ramp rate ≤3 °C/s, with no preheat restriction. It meets JEDEC JESD22-B102 E3 solderability requirements.
SMB6F100AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- SMB6FxxAY
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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
SMB6F100AY FAQ
1.How can I place an order for SMB6F100AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F100AY 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 SMB6F100AY reliable?
The price and inventory of SMB6F100AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F100AY is usually 5 days.
3.What payment methods are accepted for SMB6F100AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F100AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F100AY?
SMB6F100AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F100AY 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 SMB6F100AY?
For technical support, including SMB6F100AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F100AY requirements.
6.How does Aetrix verify that SMB6F100AY is sourced from the original manufacturer or authorized distributors?
All SMB6F100AY 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 SMB6F100AY meets industry standards.
7.What is the process for return or replacement of SMB6F100AY?
All SMB6F100AY units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F100AY, 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 SMB6F100AY part is unused and in its original packaging.
Return procedure for SMB6F100AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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