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Diodes Incorporated SMF4L150AQ-7
- Part No.:
- SMF4L150AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L150AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:9,024
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Product details
Overview
SMF4L150AQ-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade overvoltage protection in power rails and signal lines. It features a 150V working peak reverse voltage (VRWM), 167–185V breakdown voltage (VBR), 243V maximum clamping voltage (VC) at 1.0A surge current, and AEC-Q101 qualification for under-hood and battery-contact applications.
For engineers reviewing the SMF4L150AQ-7 datasheet, SMF4L150AQ-7 pinout, SMF4L150AQ-7 application, or SMF4L150AQ-7 equivalent, this device is selected for high-reliability DC power line protection where fast response (<1.0ns), low leakage (<1.6μA at VRWM), and IATF 16949-manufactured consistency are critical in automotive ECU, ADAS sensor interface, and 12V/24V battery management systems.
Technical Context
This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 167V minimum breakdown threshold. Its DO-219AA package enables low-inductance layout and thermal resistance of 70°C/W to soldering point, supporting sustained 1.0W steady-state dissipation on standard FR-4 PCBs.
The device delivers 400W peak pulse power per 10/1000µs waveform with clamping performance validated at IRSM = 1.0A, achieving VC ≤ 243V - enabling robust protection against ISO 7637-2 pulse 1, 2a, 3a/b, and IEC 61000-4-2 ±30kV ESD events without system reset or latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 150V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above 12V/24V automotive nominal rails. |
| VBR (min/max) | 167V / 185V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IRSM | 243V @ 1.0A - Clamping voltage during standardized 10/1000µs surge; defines worst-case voltage seen by downstream ICs. |
| IPP (max) | 1.6A - Peak surge current capability at VC = 243V; determines survivability against moderate-energy transients. |
| IR @ VRWM | <1.6μA - Reverse leakage at rated standoff; minimizes quiescent power loss in always-on battery circuits. |
| Response Time | <1.0ns - Time from 0V to VBR under fast-rising ESD stress; prevents damage to sensitive analog or communication ICs. |
| Package | DO-219AA - Surface-mount, low-profile (0.81–1.20mm height), RoHS-compliant, halogen-free molded plastic housing. |
Pinout & Package
DO-219AA package: single-row, two-terminal SMD device with cathode band marking indicating polarity. Cathode terminal connects to protected circuit ground; anode connects to line under protection. Thermal path optimized through cathode tab to PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Input/Line side | Connected to supply rail or signal line requiring transient suppression; carries full surge current into cathode. |
| Cathode (banded end) | Ground reference | Low-inductance connection to system ground plane; primary thermal conduction path to PCB for 70°C/W RθJS. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−55°C to +175°C) and mechanical stress; supports PPAP documentation. |
| IEC 61000-4-2 ESD rating | ±30kV air discharge, ±30kV contact discharge - exceeds industrial and automotive immunity requirements. |
| Green construction | Halogen- and antimony-free molding compound (Br+Cl <1500ppm, Sb <1000ppm); compliant with EU RoHS 3. |
| Low clamping ratio | VC/VRWM = 1.62 - tight voltage margin between standby and clamping ensures minimal overvoltage exposure to protected ICs. |
| Moisture sensitivity | Level 1 per J-STD-020 - no bake required prior to reflow; compatible with standard SMT assembly processes. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Input |
|---|---|
Use Scenario: Protects 12V supply input of BCM microcontroller and CAN transceivers from load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between fused battery rail and local LDO input. Use Value: Clamps ISO 7637-2 Pulse 5a (load dump) to ≤243V, preventing LDO overvoltage failure and ensuring MCU brown-out immunity. |
Use Scenario: Shields 5V/3.3V camera module power pins from ESD events during connector mating and cable handling. IC Role / Device Role: Point-of-entry TVS on camera board power entry, adjacent to connector. Use Value: Sub-1ns response blocks ±30kV contact ESD before it reaches image sensor or serializer IC, eliminating pixel corruption or reset. |
| Electric Power Steering (EPS) Motor Driver | 12V Battery Terminal Interface |
Use Scenario: Guards gate driver IC supply rails against inductive switching spikes from H-bridge MOSFETs. IC Role / Device Role: TVS mounted directly at driver IC VDD pin, parallel to bulk capacitor. Use Value: Limits transient overshoot to 243V during 100ns motor commutation spikes, preserving gate oxide integrity. |
Use Scenario: Installed at main vehicle battery terminal to absorb jump-start surges and reverse-polarity transients. IC Role / Device Role: Primary clamping device on battery feed line before main fuse box. Use Value: Withstands 400W peak pulses while maintaining <1.6μA leakage, avoiding parasitic drain in parked vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Same VRWM (150V), but SMA package (DO-214AC); higher RθJA (110°C/W vs. 70°C/W). | Larger footprint and lower thermal performance; unsuitable for high-density automotive modules. | Select only if DO-219AA footprint is unavailable and thermal derating can be accommodated. |
| TPSMA6L150A | Same VRWM and DO-219AA package, but lower PPK (600W vs. 400W); tighter VBR tolerance (167–175V). | Higher clamping margin (VC = 246V) and reduced ESD robustness (±25kV vs. ±30kV). | Prefer for cost-sensitive non-AEC applications where 600W headroom is needed and ±30kV ESD is not mandated. |
Compared with SMAJ150A and TPSMA6L150A, SMF4L150AQ-7 offers superior thermal coupling (RθJS = 70°C/W), AEC-Q101 certification, and guaranteed ±30kV ESD performance - making it the preferred choice for space-constrained, thermally demanding automotive power nodes.
Availability
SMF4L150AQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera power inputs, and electric power steering motor drivers requiring stable component supply with full AEC-Q101 traceability and IATF 16949 manufacturing assurance.
Supply support for SMF4L150AQ-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for under-hood and battery-connected applications where compact size, low leakage, and certified automotive reliability are mandatory.
FAQ
What is the maximum clamping voltage of SMF4L150AQ-7 at 1.0A surge current?
The maximum clamping voltage (VC) is 243V at IRSM = 1.0A, measured using the 10/1000µs standard waveform. This value is guaranteed across the full operating temperature range (−55°C to +175°C) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMF4L150AQ-7 suitable for bidirectional signal line protection?
No - SMF4L150AQ-7 is a unidirectional TVS diode, marked with a cathode band and intended for DC power rail protection. For bidirectional signal lines (e.g., CAN, LIN), the bi-directional variant SMF4L150CAQ must be used, which has symmetrical clamping in both polarities and double the IR limit.
Does SMF4L150AQ-7 require moisture preconditioning before reflow soldering?
No - it is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and placed directly into reflow without baking. This eliminates process steps and reduces risk of popcorning during lead-free soldering.
How does the DO-219AA package improve thermal performance over SMA (DO-214AC)?
The DO-219AA package achieves RθJS = 70°C/W (junction-to-soldering-point) due to its low-profile, exposed-cathode-tab design that maximizes copper contact area. In contrast, SMA packages exhibit RθJA ≈ 110°C/W, resulting in ~40% higher junction temperature rise under identical 1.0W steady-state dissipation on the same PCB layout.
SMF4L150AQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-219AA
- Series:
- SMF4L
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- Power - Peak Pulse:
- 400W
- 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:
- DO-219AA
SMF4L150AQ-7 FAQ
1.How can I place an order for SMF4L150AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L150AQ-7 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 SMF4L150AQ-7 reliable?
The price and inventory of SMF4L150AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L150AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L150AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L150AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L150AQ-7?
SMF4L150AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L150AQ-7 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 SMF4L150AQ-7?
For technical support, including SMF4L150AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L150AQ-7 requirements.
6.How does Aetrix verify that SMF4L150AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L150AQ-7 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 SMF4L150AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L150AQ-7?
All SMF4L150AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L150AQ-7, 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 SMF4L150AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L150AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L150AQ-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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