My Inquiry
My Account
Diodes Incorporated SMF4L26CA-7
- Part No.:
- SMF4L26CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L26CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:9,707
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF4L26CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for ESD and surge protection on signal/power lines. It features a 26V working peak reverse voltage (VRWM), 28.9V minimum breakdown voltage (VBR), 42.1V maximum clamping voltage (VC) at 9.5A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). It is used in automotive battery contacts and USB/USB-C interface protection.
For engineers reviewing the SMF4L26CA-7 datasheet, SMF4L26CA-7 pinout, SMF4L26CA-7 application, or SMF4L26CA-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD/VIO ratings, IEC 61000-4-2 ±30kV air/contact ESD capability, bi-directional symmetry for AC-coupled lines, and DO-219AA thermal performance under high ambient conditions.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical breakdown and clamping characteristics in forward and reverse directions. Its silicon avalanche structure enables sub-nanosecond response to transients, achieving full clamping within <5.0ns from 0V to VBR min.
The device is optimized for low capacitance (typ. 120pF at 1MHz per datasheet family trend) and low leakage (<0.5µA at VRWM), supporting high-speed data lines without signal integrity degradation. Thermal resistance RθJA is 96°C/W on standard FR-4 PCB, enabling reliable operation up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 26V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line DC bias. |
| VBR (min) | 28.9V - Minimum voltage at which avalanche conduction begins at 1mA test current; defines turn-on threshold consistency. |
| VC (max) | 42.1V - Maximum clamped voltage at 9.5A IPP; determines worst-case overvoltage stress on downstream ICs. |
| IPP (max) | 9.5A - Peak pulse current supported at VC; correlates to 400W surge handling (10/1000µs waveform). |
| IR @ VRWM | <0.5µA - Reverse leakage at rated VRWM; ensures minimal standby power loss and signal distortion. |
| ESD Rating | ±30kV contact / ±30kV air per IEC 61000-4-2 - Validates robustness against human-body-model ESD events in end-user environments. |
| Package | DO-219AA - Surface-mount, low-profile (0.6mm typical height), thermally efficient package with 1.9mm × 2.8mm footprint. |
Pinout & Package
DO-219AA is a two-terminal, bi-directional surface-mount package with no polarity marking (no cathode band). Terminals are symmetrical; either end connects to protected line and ground respectively. The molded plastic body meets UL 94V-0 flammability rating and supports reflow soldering per J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in both directions during overvoltage events; no orientation required during placement. |
| Case / Mold Compound | Thermal and mechanical interface | Provides thermal path to PCB via bottom-side copper exposure; 0.016g mass minimizes board-level thermal inertia. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Enables single-device protection against ISO 7637-2 Pulse 1/2a/3a surges and IEC 61000-4-5 Level 3 (1kV/2Ω) events. |
| Bi-directional symmetry | Eliminates polarity concerns on AC-coupled lines (e.g., RS-485, CAN, audio), reducing BOM complexity and placement errors. |
| Sub-5ns response time | Clamps transients before sensitive logic or analog circuitry can be damaged, critical for high-speed interfaces like USB 2.0/3.0. |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb; satisfies automotive and industrial environmental compliance requirements without derating. |
| JEDEC-qualified reliability | Validated per AEC-Q standards for high-reliability applications; suitable for under-hood automotive modules and industrial control systems. |
Applications
| Automotive Battery Protection | USB-C Interface Protection |
|---|---|
Use Scenario: Protects infotainment head unit power input from load dump and jump-start surges in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Bi-directional TVS placed between battery rail and DC-DC input, clamping transients before they reach PMIC or microcontroller power domains. Use Value: Withstands 400W pulses and maintains <0.5µA leakage at 26V VRWM, ensuring stable 12V system operation while meeting ISO 16750-2 requirements. |
Use Scenario: Shields USB-C CC, SBU, and VCONN pins from ESD and hot-plug transients during cable insertion/removal. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp on differential and auxiliary signal lines, preserving signal integrity up to 10Gbps. Use Value: ±30kV IEC 61000-4-2 ESD rating and <5ns response ensure compliance with USB-IF ESD test plans without degrading eye diagram margins. |
| Industrial Sensor Signal Lines | RS-485 Transceiver Protection |
Use Scenario: Safeguards 4–20mA current-loop sensor outputs against induced lightning surges in factory floor wiring. IC Role / Device Role / Timing Role: Placed across twisted-pair output terminals of pressure/temperature transmitters to shunt common-mode transients to earth. Use Value: 42.1V clamping voltage ensures protected analog front-end ICs (e.g., op-amps, ADCs) remain below absolute maximum ratings during 1kV surge events. |
Use Scenario: Protects half-duplex RS-485 transceivers (e.g., MAX13487, SN65HVD72) on long-distance fieldbus networks. IC Role / Device Role / Timing Role: Bi-directional TVS on A/B bus lines referenced to local ground, absorbing differential and common-mode noise spikes. Use Value: Symmetrical VBR (28.9V min) and VC (42.1V max) maintain bus differential voltage integrity while surviving repetitive 400W surges per IEC 61000-4-4. |
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; higher RθJA (125°C/W); 400W rating same; VC = 42.1V at 9.5A. | Larger footprint (4.5mm × 2.7mm) limits routing density; less thermally efficient on compact PCBs. | Select when legacy DO-214AC footprint compatibility is required and board space permits. |
| TPSMD26C | DO-214AB package; lower VC (40.5V at 9.5A); tighter VBR tolerance (28.9–31.9V vs. 28.9–31.9V); same 400W rating. | Marginally better clamping but larger size (7.1mm × 6.2mm); not suitable for space-constrained USB-C designs. | Prefer where lower clamping voltage justifies added board area and thermal mass is not limiting. |
Compared with SMAJ26CA and TPSMD26C, SMF4L26CA-7 offers superior thermal performance (RθJA = 96°C/W) and smallest footprint (1.9mm × 2.8mm), making it optimal for high-density automotive and portable electronics where layout area and thermal management are critical.
Availability
SMF4L26CA-7 is available at Aetrix Electronics and suitable for automotive battery protection, USB-C interface protection, and industrial RS-485 transceiver protection requiring stable component supply and AEC-Q-aligned reliability.
Supply support for SMF4L26CA-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, headquartered in Plano, Texas, with design, manufacturing, and distribution operations across Asia, Europe, and North America.
The SMF4L series belongs to Diodes' high-reliability TVS portfolio, engineered specifically for automotive-grade transient suppression in harsh environments-emphasizing low clamping, fast response, and JEDEC/AEC-Q qualified robustness.
FAQ
What is the polarity configuration of SMF4L26CA-7?
SMF4L26CA-7 is a bi-directional TVS diode with symmetrical avalanche characteristics in both forward and reverse directions. It has no cathode band marking and may be mounted in either orientation on the PCB, simplifying layout and eliminating polarity-related assembly errors.
Does SMF4L26CA-7 meet AEC-Q200 requirements?
SMF4L26CA-7 is qualified to JEDEC standards referenced in AEC-Q200 for high-reliability passive components. While not explicitly labeled "AEC-Q200 qualified" in its ordering code, Diodes confirms this part meets the stress test requirements for temperature cycling, humidity bias, and surge endurance applicable to automotive passive devices.
What is the maximum operating temperature for continuous use?
The SMF4L26CA-7 has an operating junction temperature range of –55°C to +175°C. For continuous DC operation, thermal design must ensure junction temperature remains ≤175°C, typically achievable with ≤1.0W steady-state power dissipation on a 1"×1" FR-4 board with 2 oz. copper.
How does SMF4L26CA-7 perform under repeated surge stress?
Per DS43394 Rev. 3–2, SMF4L26CA-7 supports non-repetitive 10/1000µs surges at full 400W rating. Repetitive surge capability depends on duty cycle and thermal recovery; Figure 1 shows 50% derating above +75°C ambient, confirming suitability for intermittent industrial surge events but not sustained high-frequency transients.
SMF4L26CA-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L26CA-7 FAQ
1.How can I place an order for SMF4L26CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L26CA-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 SMF4L26CA-7 reliable?
The price and inventory of SMF4L26CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L26CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L26CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L26CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L26CA-7?
SMF4L26CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L26CA-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 SMF4L26CA-7?
For technical support, including SMF4L26CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L26CA-7 requirements.
6.How does Aetrix verify that SMF4L26CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L26CA-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 SMF4L26CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L26CA-7?
All SMF4L26CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L26CA-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 SMF4L26CA-7 part is unused and in its original packaging.
Return procedure for SMF4L26CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L26CA-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…
