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Diodes Incorporated SMF4L160AQ-7
- Part No.:
- SMF4L160AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L160AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,036
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Product details
Overview
SMF4L160AQ-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 160V working peak reverse voltage (VRWM), 178–197V breakdown voltage (VBR), and 259V maximum clamping voltage (VC) at 1.0A surge current. It delivers ±30kV ESD protection per IEC61000-4-2 and is AEC-Q101 qualified for automotive power line and battery contact protection.
For engineers reviewing the SMF4L160AQ-7 datasheet, SMF4L160AQ-7 pinout, SMF4L160AQ-7 application, or SMF4L160AQ-7 equivalent, this device is selected for high-reliability DC power rail surge suppression where compact DO-219AA packaging, fast sub-1ns response, and stable clamping under 400W 10/1000µs pulses are required.
Technical Context
This TVS operates as a unidirectional clamping device, triggered when reverse voltage exceeds its 178V minimum breakdown threshold. Its junction design enables <1.0ns response from 0V to VBR, ensuring rapid suppression of fast transients such as ISO 7637-2 pulse 1/2a/3a or EFT bursts.
Thermal performance is defined by RθJA = 96°C/W on 1"×1" FR-4 with 2 oz. copper, supporting 1.0W steady-state dissipation. The device sustains 40A non-repetitive forward surge (8.3ms half-sine) and maintains ≤1.5μA reverse leakage at 160V VRWM - critical for low-power always-on automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 160V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 178V / 197V @ 1mA - Ensures reliable turn-on margin above system nominal voltage |
| VC (max) | 259V @ 1.0A - Limits downstream IC stress during 10/1000µs surge events |
| PPK | 400W (10/1000µs) - Withstands automotive load dump and inductive switching surges |
| ESD Rating | ±30kV air/contact per IEC61000-4-2 - Protects exposed connectors without external shielding |
| Leakage (IR) | ≤1.5μA @ 160V - Minimizes standby current drain in battery-powered systems |
| AEC-Q101 | Qualified - Validated for automotive underhood and infotainment power rails |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount molded plastic case (2.80mm × 1.90mm × 0.60mm), halogen-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-side return in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased clamping node | Connected to protected line (e.g., 12V/24V battery rail); cathode band identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Handles ISO 7637-2 pulse 5a (load dump) up to 120V without failure |
| Sub-1ns response time | Clamps transients before sensitive MCU or CAN transceiver inputs are stressed |
| DO-219AA footprint | Reduces PCB area by 40% vs. SMA while maintaining thermal robustness |
| AEC-Q101 qualification | Validated for -55°C to +175°C operation in engine control units and ADAS power supplies |
| ±30kV ESD protection | Eliminates need for secondary ESD components on USB, LIN, or sensor interfaces |
Applications
| Automotive Power Distribution | Battery Management Systems |
|---|---|
Use Scenario: Protection of 12V/24V supply lines feeding body control modules and lighting drivers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on main power rail. Use Value: Prevents latch-up or burnout in PMICs and microcontrollers during load dump events. | Use Scenario: Surge suppression at cell monitor IC inputs and battery pack interconnects. IC Role / Device Role / Timing Role: Standoff-rated clamping element isolating measurement circuitry from pack-level transients. Use Value: Maintains <1.5μA leakage to avoid drift in precision voltage sensing paths. |
| Infotainment Head Unit Inputs | Industrial CAN Bus Nodes |
Use Scenario: Input protection for USB-C, HDMI, and audio jacks exposed to user-handling ESD. IC Role / Device Role / Timing Role: Primary ESD shunt on interface lines with fast <1ns turn-on. Use Value: Achieves ±30kV air/contact discharge immunity without signal integrity degradation. | Use Scenario: DC power rail protection for CAN transceivers in factory automation gateways. IC Role / Device Role / Timing Role: High-energy clamping device on 5V/3.3V isolated supply derived from 24V bus. Use Value: Sustains 400W surges while limiting clamping voltage below transceiver absolute max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160A | Same VRWM and VC, but SMA package (larger footprint, higher RθJA = 110°C/W) | Less suitable for space-constrained automotive modules requiring DO-219AA density | Select when legacy board layout or higher manual handling tolerance is prioritized |
| SMCJ160A | Higher PPK (1500W), same VRWM, but DO-214AB package (5.3mm × 4.6mm) | Used where higher surge margin is needed, e.g., alternator output lines | Select only if 400W is insufficient and board space allows larger footprint |
Compared with SMAJ160A and SMCJ160A, SMF4L160AQ-7 offers optimal balance of miniaturization (DO-219AA), thermal efficiency (RθJA = 96°C/W), and automotive qualification - making it preferred for next-gen ECUs and compact BMS nodes where volume and reliability are co-constrained.
Availability
SMF4L160AQ-7 is available at Aetrix Electronics and suitable for automotive power distribution, battery management systems, infotainment interface protection, and industrial CAN bus node designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMF4L160AQ-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 and industrial markets.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for compact, high-surge-capacity transient suppression in automotive power networks and battery-connected electronics.
FAQ
What is the polarity configuration of SMF4L160AQ-7?
SMF4L160AQ-7 is a unidirectional TVS diode, indicated by the cathode band on the DO-219AA package. It conducts in forward bias and clamps reverse transients above its breakdown voltage, making it suitable for DC power rail protection where polarity is fixed.
Does SMF4L160AQ-7 meet automotive qualification standards?
Yes - SMF4L160AQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. It supports operating temperatures from –55°C to +175°C and is rated for automotive power line applications including body electronics and battery monitoring systems.
How does the DO-219AA package affect thermal performance?
The DO-219AA package provides RθJA = 96°C/W on standard 1"×1" FR-4 with 2 oz. copper, significantly better than SMA (110°C/W) and competitive with larger packages. Its low profile (0.60mm height) and optimized thermal path enable efficient heat transfer to the PCB in dense automotive layouts.
Can SMF4L160AQ-7 replace older SMAJ160A devices in existing designs?
Yes, with layout adaptation: SMF4L160AQ-7 matches SMAJ160A's electrical specs (VRWM, VBR, VC, PPK) but uses the smaller DO-219AA footprint. Pad redesign is required, and thermal validation is recommended due to differences in RθJA and mounting geometry.
SMF4L160AQ-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):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 1.5A
- 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
SMF4L160AQ-7 FAQ
1.How can I place an order for SMF4L160AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L160AQ-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 SMF4L160AQ-7 reliable?
The price and inventory of SMF4L160AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L160AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L160AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L160AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L160AQ-7?
SMF4L160AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L160AQ-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 SMF4L160AQ-7?
For technical support, including SMF4L160AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L160AQ-7 requirements.
6.How does Aetrix verify that SMF4L160AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L160AQ-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 SMF4L160AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L160AQ-7?
All SMF4L160AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L160AQ-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 SMF4L160AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L160AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L160AQ-7 Tags
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