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Diodes Incorporated SMF4L36CA-7
- Part No.:
- SMF4L36CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L36CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,118
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Product details
Overview
SMF4L36CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for high-energy ESD and surge protection on data lines and power rails. It features a 36 V working peak reverse voltage (VRWM), 40–44.2 V breakdown voltage (VBR), 58.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current, and 400 W peak pulse power dissipation (10/1000 µs waveform). It is used in automotive battery interfaces and USB-C port protection.
For engineers reviewing the SMF4L36CA-7 datasheet, SMF4L36CA-7 pinout, SMF4L36CA-7 application, or SMF4L36CA-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, IEC 61000-4-2 ±30 kV ESD robustness, bi-directional symmetry for AC-coupled lines, and DO-219AA thermal performance under repeated surge stress.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR min/max (40 V / 44.2 V) and VC (58.1 V) in either direction. Its sub-5 ns response time ensures clamping before downstream ICs experience overstress during fast transients like ESD or inductive switching spikes.
The device is rated for 400 W peak pulse power per 10/1000 µs waveform, with 0.016 g mass and low thermal resistance (RθJA = 96 °C/W) enabling effective heat dissipation on standard FR-4 PCBs. It meets IEC 61000-4-2 Level 4 (±30 kV air/±30 kV contact) and is halogen/antimony-free per Diodes' "Green" definition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 36 V - Maximum continuous reverse operating voltage before leakage exceeds 0.5 µA; sets upper limit for protected line DC bias. |
| VBR (min/max) | 40 V / 44.2 V - Breakdown occurs within this range at 1 mA test current; defines onset of clamping behavior. |
| VC @ IRSM | 58.1 V - Clamping voltage measured at 6.9 A peak surge current; must stay below protected IC's absolute max rating. |
| PPK | 400 W - Peak pulse power handling capability under standardized 10/1000 µs waveform; determines survivability of lightning/surge events. |
| ESD Rating | ±30 kV (air/contact) per IEC 61000-4-2 - Confirmed immunity to worst-case human-body-model ESD events without degradation. |
| Package | DO-219AA - Surface-mount, low-profile (0.81–1.20 mm height), thermally efficient package with 2.80 mm body width and 3.80 mm length. |
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 circuit node requiring protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Bi-directional conduction allows clamping of positive and negative surges without orientation dependency. |
| Case / Body | Thermal interface | Molded plastic body with low RθJC (18 °C/W) enables direct PCB copper pad heat sinking for repetitive surge duty. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD robustness | ±30 kV air and contact discharge - eliminates need for external ESD staging in USB, CAN, or sensor interfaces. |
| Clamping ratio (VC/VBR) | ~1.38 - Low ratio ensures minimal overvoltage overshoot during surge, critical for 3.3 V/5 V logic protection. |
| Response time | <5.0 ns - Fast enough to clamp ESD events before propagation into sensitive analog or digital inputs. |
| RoHS 3 & Green compliance | <900 ppm Br/Cl, <1000 ppm Sb - Meets automotive and industrial environmental mandates without performance trade-off. |
| JEDEC-qualified reliability | Qualified to AEC-Q200 stress test levels - validated for automotive under-hood and infotainment applications. |
Applications
| Automotive Battery Line Protection | USB-C Port ESD Clamp |
|---|---|
Use Scenario: Protects 12 V battery feed lines in ADAS ECUs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bi-directional TVS placed between battery rail and PMIC input to clamp surges up to ISO 7637-2 Pulse 5a (75 V/300 ms). Use Value: 58.1 V clamping ensures PMIC input stays below its 60 V absolute max rating while surviving 400 W pulses. |
Use Scenario: Installed on CC1/CC2 and VBUS lines of USB-C receptacles to meet USB-IF ESD compliance. IC Role / Device Role / Timing Role: First-line defense against ±30 kV contact ESD per IEC 61000-4-2, placed before USB controller and power switch. Use Value: Sub-5 ns response prevents ESD energy from coupling into high-speed PHY or Type-C controller logic. |
| Industrial CAN Bus Termination | Smart Meter RS-485 Interface |
Use Scenario: Mounted across CAN_H/CAN_L differential pair in factory automation nodes exposed to motor drive noise. IC Role / Device Role / Timing Role: Symmetric bi-directional clamping absorbs common-mode transients without disrupting CAN signaling integrity. Use Value: Identical VBR and VC in both directions maintains differential balance and avoids signal distortion during surge events. |
Use Scenario: Applied to RS-485 A/B lines in utility smart meters installed in electrically noisy substations. IC Role / Device Role / Timing Role: Surge limiter compliant with IEC 61000-4-5 (Level 3, 1 kV/2 Ω) for long cable runs. Use Value: 400 W peak power rating sustains multiple 10/1000 µs surges without parametric shift or failure. |
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 |
|---|---|---|---|
| SMAJ36CA-TP | DO-214AC package; higher RθJA (125 °C/W); 60 V VC at 6.7 A | Larger footprint; lower thermal efficiency limits repetitive surge duty cycle | Select when legacy SMA layout exists and surge repetition rate is low. |
| SP1003-36 | SO-8 package; integrated dual-channel; 55 V VC at 7.5 A; 600 W PPK | Requires PCB redesign; supports differential + common-mode protection in single device | Select when space-constrained designs require multi-line protection with tighter clamping. |
Compared with SMAJ36CA-TP, SMF4L36CA-7 offers 23% lower thermal resistance and 3% lower clamping voltage in a 30% smaller footprint; versus SP1003-36, it provides discrete channel isolation and simpler layout but lacks integrated dual-line coordination.
Availability
SMF4L36CA-7 is available at Aetrix Electronics and suitable for automotive battery management, USB-C interface protection, and industrial RS-485 communication systems requiring stable component supply and AEC-Q200-aligned reliability.
Supply support for SMF4L36CA-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 sales operations across Asia, Europe, and North America.
This device belongs to Diodes' SMF4L series of high-power, low-capacitance TVS diodes engineered specifically for automotive-grade transient suppression where compact size, low clamping voltage, and IEC 61000-4-2 compliance are mandatory.
FAQ
Is SMF4L36CA-7 unidirectional or bidirectional?
SMF4L36CA-7 is a bi-directional TVS diode, confirmed by its "CA" suffix and absence of cathode band marking. Its electrical characteristics (VBR, VC, IR) are identical for both polarities, enabling symmetric clamping on AC-coupled or floating signal lines such as CAN, RS-485, or USB-C CC pins.
What is the maximum operating temperature for continuous use?
The SMF4L36CA-7 has an operating junction temperature range of –55 °C to +175 °C. At ambient temperatures above +25 °C, derating applies: peak pulse power drops linearly to ~250 W at +85 °C and ~150 W at +125 °C per Figure 1 in DS43394 Rev. 3–2.
Does this part meet AEC-Q200 requirements?
Yes - SMF4L36CA-7 is qualified to AEC-Q200 Rev. D for passive components. It undergoes stress testing including temperature cycling, humidity bias, and surge endurance, and is manufactured in IATF 16949-certified facilities, as stated in Diodes' automotive product documentation.
How does its clamping voltage compare to SMF4L36A-7?
SMF4L36CA-7 (bi-directional) has VC = 58.1 V at 6.9 A, while SMF4L36A-7 (uni-directional) has VC = 58.1 V at 6.9 A - identical clamping performance. The key difference is polarity: SMF4L36A-7 requires correct cathode orientation and only clamps positive surges, whereas SMF4L36CA-7 clamps both polarities without orientation dependency.
SMF4L36CA-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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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
SMF4L36CA-7 FAQ
1.How can I place an order for SMF4L36CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L36CA-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 SMF4L36CA-7 reliable?
The price and inventory of SMF4L36CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L36CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L36CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L36CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L36CA-7?
SMF4L36CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L36CA-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 SMF4L36CA-7?
For technical support, including SMF4L36CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L36CA-7 requirements.
6.How does Aetrix verify that SMF4L36CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L36CA-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 SMF4L36CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L36CA-7?
All SMF4L36CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L36CA-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 SMF4L36CA-7 part is unused and in its original packaging.
Return procedure for SMF4L36CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L36CA-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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