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Diodes Incorporated SMF4L160CAQ-7
- Part No.:
- SMF4L160CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L160CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,928
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Product details
Overview
SMF4L160CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, rated for 400W peak pulse power (10/1000µs), 160V working peak reverse voltage (VRWM), 178–197V breakdown voltage (VBR), and 259V maximum clamping voltage (VC) at 1.5A IRSM. It delivers ±30kV ESD protection (IEC61000-4-2) and is AEC-Q101 qualified for automotive battery contact and power line surge suppression.
For engineers reviewing the SMF4L160CAQ-7 datasheet, SMF4L160CAQ-7 pinout, SMF4L160CAQ-7 application, or SMF4L160CAQ-7 equivalent, this device is selected for high-reliability DC power rail protection where compact size, low leakage (<1.5µA at VRWM), fast bi-directional response (<5.0ns), and IATF 16949-manufactured consistency are critical.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with clamping initiated when reverse voltage exceeds 160V (VRWM) and full conduction established at 178–197V (VBR @ 1mA). Its 259V VC at 1.5A IRSM ensures robust overvoltage limiting during 8/20µs surges without latch-up or thermal runaway.
Designed for surface-mount integration on space-constrained PCBs, it leverages a planar silicon junction in a green, halogen-free DO-219AA molded package with matte tin terminals, achieving RθJA = 96°C/W and operating from –55°C to +175°C - enabling use in under-hood automotive modules and industrial power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains single transient events without degradation in automotive load-dump or ISO 7637-2 pulse 5a scenarios. |
| Working Peak Reverse Voltage | 160V; defines maximum continuous DC or AC RMS voltage the device blocks before entering avalanche conduction. |
| Breakdown Voltage (VBR) | 178–197V @ 1mA; tight tolerance ensures predictable turn-on threshold for precise overvoltage guardbanding. |
| Maximum Clamping Voltage (VC) | 259V @ 1.5A IRSM; limits downstream circuit voltage during surge, protecting 200V-rated MOSFETs or controllers. |
| ESD Withstand | ±30kV air / ±30kV contact per IEC61000-4-2; eliminates need for secondary ESD stages in infotainment and ADAS sensor interfaces. |
| Leakage Current | 1.5µA max @ VRWM; minimizes standby power loss in always-on battery-fed systems like telematics or smart sensors. |
| Response Time | <5.0ns (bi-directional); enables sub-nanosecond reaction to fast-rising transients such as relay switching noise or inductive kickback. |
Pinout & Package
Package: DO-219AA - ultra-compact, flat leadless surface-mount package (2.80 × 1.90 × 0.60 mm), RoHS-compliant, halogen-free, moisture sensitivity level 1, with cathode band omitted to indicate bi-directional polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No polarity marking; terminals are functionally identical - connects across protected line and ground (or between differential lines) without orientation constraint. |
| Case / Mold Compound | Thermal path & mechanical interface | Green molding compound (UL 94V-0) provides insulation and transfers heat to PCB copper via bottom-side thermal pad contact; no internal thermal tab. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - required for PPAP submission in Tier-1 power module designs. |
| IATF 16949 manufacturing | Produced in certified facilities with change control, traceability, and process stability essential for safety-critical vehicle subsystems. |
| Low clamping ratio (VC/VRWM = 1.62) | Minimizes overvoltage margin needed downstream, allowing tighter voltage tolerances on 160V-rated DC-DC converters or motor drivers. |
| 1.0W steady-state dissipation | Supports continuous operation in thermally managed environments (e.g., engine control units with forced airflow or heatsinked layouts). |
| Lead-free & green compliance | Fully compliant with RoHS 3 (2015/863/EU), <900ppm Br/Cl, <1000ppm Sb - meets global automotive OEM substance restrictions. |
Applications
| Battery Management Systems | Automotive Infotainment Power Rails |
|---|---|
|
Use Scenario: Protection of 12V/24V battery input to BMS ICs and coulomb counters against jump-start spikes and alternator load dump. IC Role / Device Role: Primary bidirectional surge clamp placed directly at connector entry point before input filter capacitor. Use Value: Withstands 259V clamping at 1.5A while maintaining <1.5µA leakage - preserves low-power sleep mode integrity and avoids false fault triggering. |
Use Scenario: Safeguarding USB-C PD and HDMI power delivery lines in head units against ESD and hot-plug transients. IC Role / Device Role: Line-to-ground TVS on VBUS and CC lines, co-located with common-mode chokes to suppress differential and common-mode surges. Use Value: ±30kV ESD rating and <5ns response ensure immunity to user-handling events without signal distortion or data corruption on high-speed interfaces. |
| Industrial PLC Power Inputs | EV Onboard Charger Control Boards |
|
Use Scenario: Input stage protection for 24V/48V programmable logic controller power supplies exposed to field wiring inductive transients. IC Role / Device Role: First-line defense across L/N or +/− rails, paired with MOVs for higher-energy events. Use Value: 400W peak power rating handles repetitive 10/1000µs surges per IEC 61000-4-5 Level 3, extending system uptime in factory automation environments. |
Use Scenario: DC-link voltage monitoring circuit protection in OBC control boards subjected to regenerative braking voltage spikes. IC Role / Device Role: Bi-directional clamp across isolated ADC inputs measuring 400V DC bus, referenced to floating ground. Use Value: 160V VRWM aligns with mid-point sensing ranges; 178–197V VBR ensures clean turn-on before ADC saturation, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160CA | DO-214AC package; 400W rating; 160V VRWM; 259V VC @ 1.5A; but larger footprint (4.3 × 2.6 mm) and higher RθJA (125°C/W). | Less suitable for ultra-dense automotive PCBs; requires more board area and exhibits higher junction temperature rise under same surge conditions. | Select when legacy layout compatibility or higher surge repetition tolerance is prioritized over miniaturization. |
| TPSMD160C | DO-214AB package; 600W rating; 160V VRWM; 274V VC @ 2.2A; AEC-Q101 qualified but not IATF 16949 manufactured. | Higher clamping voltage reduces protection margin for 200V-rated components; lacks full automotive supply chain traceability. | Choose only for non-safety-critical industrial applications where cost outweighs supply-chain assurance requirements. |
Compared with SMAJ160CA and TPSMD160C, SMF4L160CAQ-7 offers superior board-space efficiency (DO-219AA), lowest thermal resistance (96°C/W), and full IATF 16949 traceability - making it the optimal choice for next-generation automotive electronics where size, thermal performance, and supply-chain compliance are jointly constrained.
Availability
SMF4L160CAQ-7 is available at Aetrix Electronics and suitable for automotive battery management, infotainment power conditioning, and industrial PLC input protection requiring stable component supply across multi-year production cycles.
Supply support for SMF4L160CAQ-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
The SMF4L series targets automotive and industrial transient suppression, engineered for AEC-Q101 compliance, ultra-low leakage, and miniature DO-219AA packaging to meet stringent space and reliability demands in modern electronic control units.
FAQ
Is SMF4L160CAQ-7 unidirectional or bidirectional?
SMF4L160CAQ-7 is a bi-directional TVS diode, confirmed by its part number suffix "CAQ" (C = bi-directional), absence of cathode band marking, and symmetrical electrical characteristics in both polarities. It clamps overvoltage events regardless of polarity - ideal for AC lines or differential DC buses where polarity reversal may occur.
What is the maximum operating temperature for SMF4L160CAQ-7?
The SMF4L160CAQ-7 has an operating junction temperature range of –55°C to +175°C, verified per AEC-Q101 stress testing. At ambient temperatures above +125°C, derating applies per Figure 1 in DS43393 Rev. 3–2; its RθJA of 96°C/W allows sustained operation up to +150°C ambient when mounted on 2 oz. copper with adequate thermal relief.
Does SMF4L160CAQ-7 require a heatsink for 400W pulse handling?
No external heatsink is required for single 400W pulses (10/1000µs), as energy dissipation occurs in microseconds and junction temperature rise remains within safe limits. However, for repetitive surges (>1 pulse/minute), PCB copper area (≥1"×1" 2 oz. Cu) must be used per datasheet thermal guidelines to maintain RθJA = 96°C/W and avoid cumulative thermal stress.
How does SMF4L160CAQ-7 differ from SMF4L160AQ?
SMF4L160AQ is unidirectional (cathode-banded, conducts only in reverse bias), while SMF4L160CAQ-7 is bi-directional (no cathode band, symmetrical clamping). Their VRWM, VBR, and VC values are identical, but SMF4L160AQ has lower forward voltage (VF = 3V @ 16A) and is used where polarity is fixed - e.g., DC output rails. SMF4L160CAQ-7 is mandatory for AC-coupled or polarity-agnostic protection.
SMF4L160CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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
SMF4L160CAQ-7 FAQ
1.How can I place an order for SMF4L160CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L160CAQ-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 SMF4L160CAQ-7 reliable?
The price and inventory of SMF4L160CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L160CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L160CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L160CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L160CAQ-7?
SMF4L160CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L160CAQ-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 SMF4L160CAQ-7?
For technical support, including SMF4L160CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L160CAQ-7 requirements.
6.How does Aetrix verify that SMF4L160CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L160CAQ-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 SMF4L160CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L160CAQ-7?
All SMF4L160CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L160CAQ-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 SMF4L160CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L160CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L160CAQ-7 Tags
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