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Vishay General Semiconductor - Diodes Division SMF24A-HM3-08
- Part No.:
- SMF24A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF24A-HM3-08.pdf
- Description:
- TVS DIODE 24VWM 38.9VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:9,533
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Product details
Overview
SMF24A-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 24 V standoff voltage (VRWM), 26.7–29.6 V reverse breakdown (VBR), 5.1 A peak pulse current (IPPM), 38.9 V maximum clamping voltage (VC) at IPPM, and 244 pF typical junction capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial I/O interfaces.
For engineers reviewing the SMF24A-HM3-08 datasheet, SMF24A-HM3-08 pinout, SMF24A-HM3-08 application, or SMF24A-HM3-08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance for signal integrity, ±30 kV IEC 61000-4-2 ESD immunity, AEC-Q101 qualification status, and compatibility with SOD-123W footprint constraints.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transient overvoltages before they damage downstream ICs. Its low incremental surge resistance ensures rapid response (<1 ns) and stable clamping across temperature (−65 °C to +175 °C).
The SMF24A-HM3-08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports wave/reflow soldering per J-STD-020 MSL level 1. It meets AEC-Q101 Class H3B (>8 kV HBM) and IEC 61000-4-2 ±30 kV contact/air discharge requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 24 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 μA |
| Breakdown Voltage (VBR) | 26.7–29.6 V at 1 mA - guaranteed conduction onset range for reliable triggering |
| Clamping Voltage (VC) | 38.9 V max at 5.1 A (10/1000 μs) - limits voltage seen by protected IC during surge |
| Junction Capacitance (CD) | 244 pF at 0 V, 1 MHz - enables use in ≤480 Mbps USB 2.0 without signal distortion |
| ESD Rating | ±30 kV contact & air (IEC 61000-4-2) - exceeds industrial and automotive ESD immunity requirements |
| Package | DO-219AB (SOD-123W compatible) - 3.9 × 1.9 × 1.08 mm low-profile footprint for space-constrained PCBs |
| Thermal Resistance (RthJA) | 180 K/W on 3 mm × 3 mm Cu pad - defines safe power dissipation limit in standard layout |
Pinout & Package
SMF24A-HM3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: cathode-bar marked, 2-terminal unidirectional configuration. Dimensions: 3.9 mm length × 1.9 mm width × 1.08 mm height. Mold compound: UL 94 V-0 rated; MSL level 1; peak reflow temp ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal trace upstream of IC; conducts surge current to ground when clamped |
| Cathode | Ground reference terminal | Connected to system ground plane; establishes reference for clamping threshold and ESD return path |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise fast-response clamping | Sub-nanosecond response time preserves signal integrity in high-speed digital interfaces |
| AEC-Q101 qualified variant | SMF24A-HM3-08 includes automotive-grade screening per AEC-Q101 (H3B >8 kV HBM) |
| 200 W peak pulse power (10/1000 μs) | Sustains repeated transients in industrial control and automotive body electronics without degradation |
| Compatible with SOD-123W footprint | Enables drop-in replacement or layout reuse with common SOD-123W land patterns |
| UL 94 V-0 molding compound | Ensures flame-retardant reliability in enclosed enclosures and safety-critical systems |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and chassis ground, clamping surges before reaching USB transceiver. Use Value: 244 pF capacitance avoids signal rise-time degradation; 38.9 V clamping prevents damage to 3.3 V tolerant PHY inputs. | Use Scenario: Safeguarding TMDS clock and data channels in set-top boxes and displays exposed to handling ESD. IC Role / Device Role / Timing Role: Single-channel transient suppressor on each TMDS lane, referenced to local ground plane. Use Value: ±30 kV IEC 61000-4-2 rating covers worst-case human-body discharge; low capacitance maintains 165 MHz pixel clock fidelity. |
| Industrial I/O Ports | Automotive Body Control Modules |
Use Scenario: Protecting RS-485/RS-232 interface pins on PLC modules subjected to field wiring transients and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on each signal line, with cathode tied to isolated signal ground. Use Value: 24 V VRWM matches common 24 V industrial bus levels; 200 W pulse rating handles induced lightning surges. | Use Scenario: Shielding LIN bus or sensor inputs in door modules and seat controllers from assembly-line ESD and load-dump coupling. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional suppressor on low-speed communication lines. Use Value: Qualified for automotive environments (−65 °C to +175 °C); 5.1 A IPPM withstands ISO 7637-3 pulse 2a transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | DO-214AC (SMA) package; 3.5 mm × 2.3 mm × 1.3 mm; higher RthJA (200 K/W); 39.4 V VC at 5.1 A | Larger footprint; less suitable for ultra-thin or dense layouts; same VRWM and clamping performance | Choose SMAJ24A-E3/57T only if board space allows larger package and thermal margin is sufficient |
| TPD2E001DRYR | 2-channel bidirectional array in SOT-553; 12 pF @ 0 V; 15 V VRWM; not AEC-Q101 qualified | Lower capacitance ideal for USB 2.0 but lower standoff; unsuitable for 24 V industrial lines or automotive | Select TPD2E001DRYR only for low-voltage, high-speed consumer ports where 24 V operation is unnecessary |
Compared with SMAJ24A-E3/57T and TPD2E001DRYR, SMF24A-HM3-08 uniquely balances 24 V standoff, 244 pF capacitance, AEC-Q101 qualification, and ultra-low-profile DO-219AB packaging - making it optimal for space-constrained industrial and automotive signal line protection where both voltage rating and ESD robustness are critical.
Availability
SMF24A-HM3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI channel safeguarding, and industrial 24 V I/O port hardening requiring stable component supply across production lifecycles.
Supply support for SMF24A-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 signal line protection with optimized clamping, low capacitance, and AEC-Q101 qualification - engineered specifically for ESD-hardened interfaces in automotive infotainment, industrial automation, and consumer connectivity.
FAQ
What is the standoff voltage rating of the SMF24A-HM3-08?
The SMF24A-HM3-08 has a maximum standoff voltage (VRWM) of 24 V, meaning it remains non-conductive up to this reverse voltage while leaking less than 0.1 μA. This rating makes SMF24A-HM3-08 suitable for protecting 24 V industrial signal lines and automotive subsystems where sustained operating voltage must be tolerated without conduction.
Is the SMF24A-HM3-08 qualified to AEC-Q101 standards?
Yes, the SMF24A-HM3-08 is AEC-Q101 qualified and rated for Class H3B human body model (HBM) with >8 kV ESD tolerance. This qualification confirms its suitability for automotive applications including body electronics, infotainment interfaces, and sensor signal conditioning where reliability under harsh environmental stress is mandatory.
What is the clamping voltage of the SMF24A-HM3-08 under a 10/1000 μs surge?
The SMF24A-HM3-08 exhibits a maximum clamping voltage (VC) of 38.9 V at 5.1 A peak pulse current under the 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream 3.3 V or 5 V ICs remain within safe operating margins when SMF24A-HM3-08 is correctly applied.
Does the SMF24A-HM3-08 support automated SMT assembly processes?
Yes, the SMF24A-HM3-08 is fully compatible with standard wave and reflow soldering per J-STD-020, rated for peak temperatures up to 260 °C. Its DO-219AB package is MSL level 1, eliminating bake requirements, and its orientation in carrier tape (cathode bar visible) enables reliable pick-and-place placement - critical for high-yield manufacturing of SMF24A-HM3-08-equipped boards.
How does the junction capacitance of the SMF24A-HM3-08 affect high-speed signal integrity?
The SMF24A-HM3-08 has a typical junction capacitance of 244 pF at 0 V and 1 MHz, which is carefully balanced for 480 Mbps USB 2.0 compliance. While higher than some ultra-low-capacitance arrays, this value avoids excessive signal attenuation or timing skew on moderate-speed lines - making SMF24A-HM3-08 appropriate for industrial UART, CAN FD stubs, and HDMI TMDS clock lanes where robustness outweighs extreme bandwidth demands.
SMF24A-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 5.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 244pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF24A-HM3-08 FAQ
1.How can I place an order for SMF24A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF24A-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 SMF24A-HM3-08 reliable?
The price and inventory of SMF24A-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 SMF24A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF24A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF24A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF24A-HM3-08?
SMF24A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF24A-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 SMF24A-HM3-08?
For technical support, including SMF24A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF24A-HM3-08 requirements.
6.How does Aetrix verify that SMF24A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF24A-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 SMF24A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF24A-HM3-08?
All SMF24A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF24A-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 SMF24A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF24A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF24A-HM3-08 Tags
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