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Vishay General Semiconductor - Diodes Division SMF11A-HM3-08
- Part No.:
- SMF11A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF11A-HM3-08.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
SMF11A-HM3-08 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 11 V stand-off voltage (VRWM), 12.2–13.5 V reverse breakdown (VBR), 11 A peak pulse current (IPPM), 18.2 V maximum clamping voltage (VC) at IPPM, and 509 pF typical junction capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O port protection.
For engineers reviewing the SMF11A-HM3-08 datasheet, SMF11A-HM3-08 pinout, SMF11A-HM3-08 application, or SMF11A-HM3-08 equivalent, this device is selected for robust ±30 kV IEC 61000-4-2 ESD immunity, low clamping ratio (VC/VBR ≈ 1.45), AEC-Q101 qualification, and compatibility with SOD-123W footprint layouts in space-constrained PCBs.
Technical Context
The SMF11A-HM3-08 operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche clamping to divert ESD transients away from sensitive downstream circuitry. Its low incremental surge resistance ensures rapid voltage clamping within nanoseconds of event onset, while its 1.08 mm height and 3.9 × 1.9 mm footprint support ultra-thin portable and automotive electronics.
It complies with IEC 61000-4-2 (±30 kV contact/air), IEC 61000-4-5 (1000 W, 8/20 μs), and AEC-Q101 (H3B human body model >8 kV). Thermal resistance (RthJA = 180 K/W) and 175 °C max junction temperature enable operation in harsh environments without derating under typical board mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 11 V - maximum continuous reverse operating voltage before clamping begins; sets threshold for signal integrity preservation in 10–12 V logic interfaces. |
| Reverse Breakdown (VBR) | 12.2–13.5 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during fast transients. |
| Clamping Voltage (VC) | 18.2 V at 11 A (10/1000 μs) - limits downstream voltage stress; enables safe interface protection for 16 V-rated receivers. |
| Junction Capacitance | 509 pF at 0 V, 1 MHz - measured value impacts high-frequency signal integrity; suitable for ≤480 Mbps USB 2.0 but not USB 3.x. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for industrial and automotive end-equipment. |
| Package | DO-219AB (SOD-123W-compatible) - standardized low-profile outline with cathode bar marking; supports automated placement and reflow soldering. |
Pinout & Package
The SMF11A-HM3-08 is a two-terminal unidirectional TVS diode housed in the DO-219AB (SMF) package. Cathode is marked by a bar on the top surface; anode is unmarked. The package measures 3.9 mm × 1.9 mm × 1.08 mm and is compatible with SOD-123W land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Input/Line side connection | Connected to protected signal line (e.g., USB D+); conducts surge current toward ground when clamped. |
| Cathode (bar-marked end) | Ground reference terminal | Connected to system ground plane; establishes clamping reference and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Supports repeated ESD events without degradation; sufficient for >100,000 cycles in typical industrial I/O applications. |
| Low Clamping Ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs; improves margin for 16 V absolute maximum rated receivers. |
| AEC-Q101 Qualified | Validated for automotive under-hood and infotainment systems requiring extended temperature (-65 °C to +175 °C) reliability. |
| "Low Noise" Fast Response | Sub-nanosecond response time ensures clamping activation before ESD energy couples into signal paths. |
| Solder Reflow Compatible | Rated for peak temperatures up to 260 °C; qualified for standard lead-free reflow profiles without delamination or parametric shift. |
Applications
| USB 2.0 Port Protection | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines against electrostatic discharge during cable insertion or handling in consumer tablets and industrial HMIs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground, clamping transients before they reach the USB transceiver. Use Value: Maintains signal integrity below 480 Mbps with 509 pF capacitance while delivering ±30 kV ESD immunity per IEC 61000-4-2. | Use Scenario: Safeguarding HDMI TMDS channels from ESD events in set-top boxes and automotive display modules exposed to user touch. IC Role / Device Role / Timing Role: Standoff-limited clamping device on each differential pair, referenced to local ground to prevent common-mode voltage overshoot. Use Value: 11 V VRWM aligns with HDMI DC bias levels; 18.2 V VC ensures compliance with receiver's 20 V abs-max rating under worst-case surge. |
| Automotive Body Control Module I/O | Industrial Sensor Interface Protection |
Use Scenario: Protecting LIN bus or GPIO lines in automotive BCMs subjected to ISO 10605 and IEC 61000-4-2 stress during service or assembly. IC Role / Device Role / Timing Role: Primary ESD shunt on external-facing pins, mounted adjacent to connector to minimize trace inductance. Use Value: AEC-Q101 qualification and -65 °C to +175 °C operation ensure reliability across thermal cycling and under-hood environments. | Use Scenario: Shielding 4–20 mA analog input or RS-485 transceiver pins in PLC I/O modules from field-induced ESD in factory automation settings. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed directly at connector entry point to limit voltage rise on protected node. Use Value: 509 pF capacitance avoids loading of 100 kHz sensor bandwidth; 11 A IPPM handles multi-kV surge coupling via long cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5A | Higher clamping voltage (23.2 V), larger SMA package (4.5 × 2.7 mm), 600 pF capacitance. | Less suitable for high-speed interfaces due to higher VC and CD; better for power-line or lower-frequency I/O. | Select when board space allows larger footprint and higher clamping is acceptable for 24 V systems. |
| TPD4E001DPYR | Quad-channel, 15 pF per channel, 12 V VRWM, ±15 kV ESD, 0.65 mm × 1.45 mm X2SON. | Designed for multi-line protection (e.g., USB ID/VD+/VD−/VBUS); not a direct single-diode replacement. | Choose for compact multi-line protection where layout density and low capacitance outweigh discrete flexibility. |
Compared with SMAJ11A-E3/5A and TPD4E001DPYR, the SMF11A-HM3-08 delivers optimal balance of low profile (1.08 mm height), moderate capacitance (509 pF), and tight clamping (18.2 V) for single-line 11 V interface protection - making it preferred for USB 2.0, HDMI, and automotive I/O where footprint and clamping performance are critical.
Availability
SMF11A-HM3-08 is available at Aetrix Electronics and suitable for USB 2.0 port protection, HDMI interface safeguarding, and automotive body control module I/O requiring stable component supply and AEC-Q101-compliant ESD resilience.
Supply support for SMF11A-HM3-08 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The SMF series targets high-speed data line protection with AEC-Q101 qualification, low-profile packaging, and precise clamping performance - engineered specifically for ESD-critical interfaces in compact, thermally demanding applications.
FAQ
What is the maximum clamping voltage of the SMF11A-HM3-08 under a 10/1000 μs surge?
The SMF11A-HM3-08 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 11 A peak pulse current with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of Vishay's document 85881 and reflects worst-case voltage seen by downstream circuitry during transient suppression. The SMF11A-HM3-08 maintains this clamping performance across its full operating temperature range.
Is the SMF11A-HM3-08 AEC-Q101 qualified?
Yes, the SMF11A-HM3-08 is AEC-Q101 qualified, meeting the stress test requirements for discrete semiconductors used in automotive applications. It is rated for human body model (HBM) Class H3B (>8 kV) and operates across -65 °C to +175 °C. This qualification is explicitly stated in Vishay's SMF5V0A–SMF58A datasheet (Rev. 2.4) and confirmed in ordering code "HM3", where "H" denotes AEC-Q101 qualification.
What does the "-HM3-08" suffix indicate in SMF11A-HM3-08?
The "-HM3-08" suffix identifies key manufacturing and packaging attributes: "H" signifies AEC-Q101 qualification; "M3" denotes tape-and-reel packaging per EIA-481 standard with 3,000 units per 7-inch reel; and "08" specifies RoHS-compliant, lead-free terminations with matte tin plating. This coding aligns with Vishay's official ordering information table in document 85881.
Can the SMF11A-HM3-08 be used for bidirectional signal lines like RS-485?
No, the SMF11A-HM3-08 is a unidirectional TVS diode and is not suitable for bidirectional lines without additional circuitry. Its electrical characteristics - including reverse breakdown and clamping behavior - are defined only for forward (anode-to-cathode) conduction during negative transients relative to ground. For RS-485, a bidirectional device such as SMBJ11CA or dedicated array solutions must be used. The SMF11A-HM3-08 datasheet confirms single-path, cathode-grounded operation.
What is the junction capacitance of the SMF11A-HM3-08 at 0 V and 1 MHz?
The SMF11A-HM3-08 exhibits a typical junction capacitance (CD) of 509 pF at 0 V reverse bias and 1 MHz frequency, as published in the Electrical Characteristics table of Vishay's document 85881. This value is measured under standardized conditions and is critical for assessing high-speed signal integrity impact - for example, limiting usable bandwidth in USB 2.0 applications but remaining acceptable for sub-100 MHz analog or digital I/O.
SMF11A-HM3-08 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 509pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF11A-HM3-08 FAQ
1.How can I place an order for SMF11A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF11A-HM3-08 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 SMF11A-HM3-08 reliable?
The price and inventory of SMF11A-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF11A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF11A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF11A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF11A-HM3-08?
SMF11A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF11A-HM3-08 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 SMF11A-HM3-08?
For technical support, including SMF11A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF11A-HM3-08 requirements.
6.How does Aetrix verify that SMF11A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF11A-HM3-08 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 SMF11A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF11A-HM3-08?
All SMF11A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF11A-HM3-08, 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 SMF11A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF11A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF11A-HM3-08 Tags
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