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Vishay General Semiconductor - Diodes Division SMF36A-E3-08
- Part No.:
- SMF36A-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF36A-E3-08.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:42,376
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Product details
Overview
SMF36A-E3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression in high-speed data lines. It features a 36 V standoff voltage (VRWM), 40–44.3 V reverse breakdown (VBR), 58.1 V maximum clamping voltage at 3.4 A peak pulse current, and 178 pF typical capacitance at 1 MHz - optimized for USB 2.0, HDMI, and industrial I/O protection.
For engineers reviewing the SMF36A-E3-08 datasheet, SMF36A-E3-08 pinout, SMF36A-E3-08 application, or SMF36A-E3-08 equivalent, this device is evaluated for ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification, low-noise fast response, and compatibility with wave/reflow soldering in space-constrained layouts.
Technical Context
This diode operates as a single-channel unidirectional TVS, leveraging silicon avalanche technology to clamp transients above its breakdown threshold while maintaining low leakage (<0.1 µA at VRWM). Its DO-219AB package enables low thermal resistance (RthJA = 180 K/W) on standard PCBs and supports high surge robustness (200 W @ 10/1000 µs, 1000 W @ 8/20 µs).
The device meets automotive-grade reliability per AEC-Q101 (H3B ESD class >8 kV HBM), delivers sub-nanosecond response time via "Low Noise" technology, and maintains stable clamping performance across -65 °C to +175 °C operating temperature range - critical for under-hood and industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 36 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin for 33 V nominal bus systems. |
| Breakdown Voltage (VBR) | 40–44.3 V at 1 mA - precise avalanche initiation range ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 58.1 V max at 3.4 A IPPM - limits downstream IC stress during 10/1000 µs surges, enabling robust interface protection. |
| Capacitance (CD) | 178 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) signal integrity, but not suitable for USB 3.x or PCIe Gen3+. |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for consumer and automotive infotainment ports. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline supports automated placement and high-density routing. |
| Operating Temp | -65 °C to +175 °C - validated for extended-range environments including engine control units and power inverters. |
Pinout & Package
SMF36A-E3-08 uses the DO-219AB (SMF) package: cathode-marked surface-mount case with two terminals. The package height is 1.08 mm max, length 3.9 mm, width 1.9 mm, and weight 15 mg. It is compatible with SOD-123W footprint and reflow-solderable per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal or power line requiring ESD clamping; referenced to system ground via cathode. |
| Cathode | Ground reference terminal | Must be tied to low-impedance system ground plane to enable effective transient shunting and minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 µs) | Supports repeated ESD and lightning-induced surges without degradation in compact layouts. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for external ESD test fixtures during system-level compliance testing. |
| AEC-Q101 qualified | Validated for automotive electronics including body control modules and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping accuracy for sensitive receivers. |
| "Low Noise" fast response | Sub-nanosecond turn-on preserves signal edge integrity in high-speed digital interfaces. |
Applications
| USB 2.0 Port Protection | HDMI Interface Clamping |
|---|---|
Use Scenario: Protecting D+ and D- lines of embedded USB host controllers against ESD events during hot-plug insertion. IC Role / Device Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp transients before reaching PHY. Use Value: 178 pF capacitance avoids signal distortion at 480 Mbps, while 58.1 V clamping prevents damage to USB transceivers rated for ≤60 V absolute max. | Use Scenario: Safeguarding TMDS clock and data channels in industrial display controllers exposed to handling ESD. IC Role / Device Role: Point-of-entry protection on each differential pair, with cathodes routed to clean ground plane. Use Value: ±30 kV contact discharge rating ensures pass/fail compliance in IEC 61000-4-2 testing without derating or layout changes. |
| Automotive Sensor I/O | Industrial CAN Bus Node |
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in engine management ECUs from ignition noise and load dump coupling. IC Role / Device Role: Low-leakage (0.1 µA) unidirectional clamp on signal path to ADC input, preserving measurement accuracy. Use Value: -65 °C to +175 °C operating range matches under-hood thermal profiles; AEC-Q101 qualification confirms long-term reliability. | Use Scenario: Adding secondary ESD protection on CAN_H/CAN_L lines downstream of primary common-mode choke in gateway modules. IC Role / Device Role: Standalone TVS for asymmetric surge suppression where bidirectional devices introduce excessive capacitance. Use Value: 36 V VRWM aligns with 24 V CAN FD systems; 58.1 V VC ensures transceivers remain within safe SOA during ISO 10605 pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | DO-214AC (SMA) package; higher RthJA (200 K/W); 64.5 V VC at 3.1 A IPPM | Larger footprint (4.5 × 2.7 mm); less suitable for ultra-dense layouts | Select when legacy SMA footprint reuse is required and thermal margin allows higher junction temp rise. |
| TPD2E001DRYR | 2-channel bidirectional array; 12 pF capacitance; 5 V VRWM; 15 V VC; SC-70 package | Designed for low-capacitance high-speed interfaces (e.g., USB 3.0, MIPI), not 36 V rail protection | Choose only for <5 V logic-level lines where capacitance is critical; not a functional replacement for SMF36A-E3-08. |
Compared with SMAJ36A-E3/57T and TPD2E001DRYR, SMF36A-E3-08 provides superior space efficiency and lower clamping voltage for 33–36 V systems, while avoiding the capacitance trade-off of ultra-high-speed arrays - making it optimal for cost-sensitive, thermally constrained industrial and automotive I/O protection.
Availability
SMF36A-E3-08 is available at Aetrix Electronics and suitable for USB 2.0 port hardening, automotive sensor interface protection, and industrial CAN node ESD hardening requiring stable component supply and full traceability.
Supply support for SMF36A-E3-08 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in power management, sensing, and protection components with emphasis on reliability and automotive-grade validation.
The SMF series targets high-reliability transient suppression in space-constrained, high-temperature environments - specifically engineered for ESD-critical interfaces in automotive, industrial automation, and medical equipment.
FAQ
What is the maximum clamping voltage of SMF36A-E3-08 under standard surge conditions?
The SMF36A-E3-08 has a maximum clamping voltage (VC) of 58.1 V at 3.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ensures downstream ICs remain within safe operating area during transient events. The clamping performance is guaranteed across the full -65 °C to +175 °C operating range, and SMF36A-E3-08 maintains consistency due to its low incremental surge resistance.
Is SMF36A-E3-08 qualified for automotive applications?
Yes, SMF36A-E3-08 is AEC-Q101 qualified and rated for human body model (HBM) ESD >8 kV (Class H3B). It meets stringent automotive reliability requirements including thermal cycling, humidity bias, and mechanical shock testing. The device's -65 °C to +175 °C operating range and DO-219AB package stability make SMF36A-E3-08 suitable for under-hood and body electronics, and Vishay documentation explicitly lists AEC-Q101 qualification for the SMF36A variant.
Can SMF36A-E3-08 be used for bidirectional signal lines like RS-485?
No, SMF36A-E3-08 is a unidirectional TVS diode and must be used with the cathode tied to ground - it does not protect against negative-going transients on the anode side. For bidirectional lines such as RS-485 or CAN, a symmetric or bidirectional TVS (e.g., SMBJ36CA) is required. Using SMF36A-E3-08 on bidirectional signals risks forward conduction during negative excursions and inadequate protection; always verify polarity alignment before deploying SMF36A-E3-08.
What is the capacitance of SMF36A-E3-08 and how does it affect high-speed interfaces?
SMF36A-E3-08 has a typical capacitance of 178 pF at 0 V and 1 MHz. This value is appropriate for USB 2.0 (480 Mbps) and HDMI 1.4 interfaces where signal rise times are ≥1 ns, but it exceeds recommended limits for USB 3.0 (>5 pF), PCIe Gen3 (>0.5 pF), or MIPI D-PHY (>1.5 pF). Designers must validate eye diagram integrity when using SMF36A-E3-08 in high-speed links, and SMF36A-E3-08 should not be applied where sub-20 pF loading is required.
Does SMF36A-E3-08 require special PCB layout considerations?
Yes - to maximize ESD suppression effectiveness, SMF36A-E3-08 requires a short, low-inductance path from cathode to a solid ground plane, with minimal trace length (<5 mm preferred) and no vias in the ground return. The anode should connect directly to the protected line, and the device must be placed at the board edge or connector entry point. Thermal relief on cathode pad should be avoided, and SMF36A-E3-08's DO-219AB footprint must match the recommended 1.3 × 2.9 mm pad layout per Vishay S8-V-3915.01-001.
SMF36A-E3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 178pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF36A-E3-08 FAQ
1.How can I place an order for SMF36A-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF36A-E3-08 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 SMF36A-E3-08 reliable?
The price and inventory of SMF36A-E3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF36A-E3-08 is usually 5 days.
3.What payment methods are accepted for SMF36A-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF36A-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF36A-E3-08?
SMF36A-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF36A-E3-08 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 SMF36A-E3-08?
For technical support, including SMF36A-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF36A-E3-08 requirements.
6.How does Aetrix verify that SMF36A-E3-08 is sourced from the original manufacturer or authorized distributors?
All SMF36A-E3-08 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 SMF36A-E3-08 meets industry standards.
7.What is the process for return or replacement of SMF36A-E3-08?
All SMF36A-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF36A-E3-08, 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 SMF36A-E3-08 part is unused and in its original packaging.
Return procedure for SMF36A-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF36A-E3-08 Tags
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