My Inquiry
My Account
Diodes Incorporated SMF4L26CAQ-7
- Part No.:
- SMF4L26CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L26CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:9,706
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF4L26CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for automotive-grade ESD and surge protection. It features 26V working peak reverse voltage (VRWM), 28.9V minimum breakdown voltage (VBR), 42.1A maximum peak pulse current (IRSM), 328V clamping voltage (VC), and AEC-Q101 qualification - deployed on battery contacts and power management rails in 12V/24V vehicle subsystems.
For engineers reviewing the SMF4L26CAQ-7 datasheet, SMF4L26CAQ-7 pinout, SMF4L26CAQ-7 application, or SMF4L26CAQ-7 equivalent, key selection criteria include bidirectional clamping capability at 26V standoff, IEC61000-4-2 ±30kV ESD immunity, 400W 10/1000µs surge rating, DO-219AA footprint compatibility, and AEC-Q101 compliance for under-hood electronics.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with clamping initiated when reverse voltage exceeds 28.9V (min) and fully limiting to ≤328V at 42.1A peak surge. Its sub-5ns response time ensures protection against fast transients like load dump spikes and ISO 7637-2 pulses.
Thermal design leverages low junction-to-solder-point resistance (RθJS = 70°C/W) and 1.0W steady-state dissipation on FR-4 PCBs. The device sustains operation from –55°C to +175°C ambient, meeting automotive under-hood thermal requirements without derating below +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 26V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR (min) | 28.9V - Minimum breakdown voltage at 1mA test current; guarantees reliable turn-on above VRWM with margin. |
| VC (max) | 328V - Maximum clamped voltage at 42.1A peak pulse; defines worst-case voltage seen by protected ICs during surge. |
| PPK | 400W - Peak pulse power handling (10/1000µs waveform); supports ISO 7637-2 Pulse 5a load-dump energy absorption. |
| ESD Rating | ±30kV contact & air per IEC61000-4-2 - Enables robust protection of exposed connectors and sensors without external shielding. |
| Operating Temp | –55°C to +175°C - Validated for engine bay, transmission control, and ADAS sensor modules without thermal derating. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive applications including PPAP submission and IATF 16949 manufacturing traceability. |
Pinout & Package
Package: DO-219AA - surface-mount, flat-lead, bi-directional configuration with no cathode band marking; 1.90mm width × 2.80mm length × 0.60mm height; RoHS-compliant matte tin finish on copper alloy leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No polarity sensitivity - connects across protected line and ground (or between differential lines) without orientation constraints. |
| Case / Body | Non-electrical mechanical interface | Plastic-molded body provides insulation and mechanical stability; solderable per MIL-STD-202, Method 208. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Enables single-device protection against ISO 7637-2 Pulse 5a (load dump) in 12V systems up to 35V battery transients. |
| ±30kV IEC61000-4-2 ESD immunity | Eliminates need for secondary ESD components on infotainment USB ports, CAN bus stubs, and sensor interfaces. |
| DO-219AA footprint (1.9×2.8mm) | Reduces PCB area by 40% vs. SMA packages while maintaining thermal performance via optimized leadframe geometry. |
| AEC-Q101 qualified & PPAP capable | Supports direct integration into Tier 1 automotive BOMs with full change control, lot traceability, and IATF 16949 production audit readiness. |
Applications
| Automotive Battery Protection | Infotainment USB Interface |
|---|---|
|
Use Scenario: Protecting 12V battery feed lines from load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between battery rail and downstream DC-DC converters or microcontrollers. Use Value: Limits transient voltage to ≤328V at 42.1A, preventing latch-up or gate oxide damage in PMICs and MCU power domains. |
Use Scenario: Shielding USB 2.0 data lines and VBUS from ESD events during hot-plug insertion in center console ports. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at USB connector pins to shunt ESD before reaching PHY transceivers. Use Value: Delivers ±30kV contact ESD suppression with <10pF typical junction capacitance, preserving signal integrity up to 480Mbps. |
| CAN Bus Node Protection | ADAS Camera Power Input |
|
Use Scenario: Safeguarding CAN FD transceivers connected to chassis harnesses exposed to ISO 16750-2 electrical disturbances. IC Role / Device Role / Timing Role: Bidirectional TVS installed across CAN_H/CAN_L differential pair and ground reference plane. Use Value: Clamps common-mode surges to ≤328V within <5ns, preventing bit errors or transceiver latch-up during road-induced transients. |
Use Scenario: Securing 5V/3.3V power input to 8MP image sensors in rear-view cameras subjected to engine cranking dips and alternator ripple. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of LDO regulators to absorb high-energy spikes before regulation stage. Use Value: Withstands 400W surges while maintaining 26V VRWM - avoids false triggering during normal 13.5–14.8V alternator operation. |
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 |
|---|---|---|---|
| SMAJ26CA | DO-214AC package; 400W rating; 38.9V VC at 10.3A; higher clamping voltage than SMF4L26CAQ-7's 328V at 42.1A. | Larger footprint (4.3×2.6mm vs. 2.8×1.9mm); lower surge current capacity limits use in high-energy load dump scenarios. | Select when legacy SMA layout exists and 38.9V clamping is acceptable for protected ICs. |
| TPSMF26CA | DO-219AB package; same 26V VRWM; 328V VC at 42.1A; identical electrical specs but non-AEC-Q101 rated. | Not qualified for automotive; suitable only for industrial or consumer applications where PPAP and IATF 16949 traceability are not required. | Choose for cost-sensitive non-automotive designs needing identical clamping performance without automotive certification overhead. |
Compared with SMAJ26CA and TPSMF26CA, SMF4L26CAQ-7 uniquely combines AEC-Q101 qualification, DO-219AA space savings, and lowest clamping voltage (328V) at highest surge current (42.1A) in its 26V class - making it optimal for next-gen automotive power domain protection where board space and transient margin are critical.
Availability
SMF4L26CAQ-7 is available at Aetrix Electronics and suitable for automotive battery management, infotainment interface protection, and ADAS camera power conditioning requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMF4L26CAQ-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 in Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.
The SMF4L series belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in harsh environments - targeting ECU, body control, and ADAS subsystems demanding AEC-Q101 validation and PPAP readiness.
FAQ
What is the clamping voltage of SMF4L26CAQ-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 328V at 42.1A peak pulse current (IRSM), measured using the 10/1000µs standard waveform. This value represents the worst-case voltage imposed on protected circuitry during a full-rated surge event and is validated per JEDEC standards in the DS43393 datasheet.
Is SMF4L26CAQ-7 unidirectional or bidirectional, and how is polarity identified?
SMF4L26CAQ-7 is a bi-directional TVS diode, indicated by the "C" in its part number and absence of cathode band marking on the DO-219AA package. Its symmetrical construction allows installation without orientation concerns across differential lines or between rail and ground.
Does SMF4L26CAQ-7 meet automotive qualification requirements beyond AEC-Q101?
Yes - it is manufactured in IATF 16949-certified facilities, supports PPAP documentation, and is designated for automotive applications requiring specific change control. Its qualification covers temperature cycling, humidity testing, and long-term reliability per AEC-Q101 Rev G, with full traceability to wafer lot and assembly batch.
How does the DO-219AA package of SMF4L26CAQ-7 compare thermally to SMA or SMC packages?
DO-219AA delivers RθJS = 70°C/W (junction-to-solder-point), outperforming SMA (RθJS ≈ 100°C/W) and matching SMC in thermal efficiency while occupying 40% less PCB area. Its copper alloy leadframe and optimized mold compound enable 1.0W steady-state dissipation on standard 1"×1" FR-4 boards with 2 oz. copper.
SMF4L26CAQ-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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 9.5A
- 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
SMF4L26CAQ-7 FAQ
1.How can I place an order for SMF4L26CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L26CAQ-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 SMF4L26CAQ-7 reliable?
The price and inventory of SMF4L26CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L26CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L26CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L26CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L26CAQ-7?
SMF4L26CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L26CAQ-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 SMF4L26CAQ-7?
For technical support, including SMF4L26CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L26CAQ-7 requirements.
6.How does Aetrix verify that SMF4L26CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L26CAQ-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 SMF4L26CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L26CAQ-7?
All SMF4L26CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L26CAQ-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 SMF4L26CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L26CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L26CAQ-7 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…
