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Vishay SMF24A-HM3_A08
- Part No.:
- SMF24A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF24A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
SMF24A-HM3_A08 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 range (VBR), 5.1 A peak pulse current (IPPM), 38.9 V maximum clamping voltage (VC), and 244 pF typical capacitance at 1 MHz - optimized for USB 2.0, HDMI, and industrial I/O protection.
For engineers reviewing the SMF24A-HM3_A08 datasheet, SMF24A-HM3_A08 pinout, SMF24A-HM3_A08 application, or SMF24A-HM3_A08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance for signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transients above its breakdown threshold while maintaining low leakage (<0.1 μA at VRWM). Its low incremental surge resistance enables fast response and stable clamping during ±30 kV IEC 61000-4-2 ESD events.
The SMF24A-HM3_A08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports operation across -65 °C to +175 °C - meeting automotive-grade thermal and reliability requirements per AEC-Q101 when qualified (HE3 variant denotes AEC-Q101 qualification).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 24 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| Breakdown Voltage (VBR) | 26.7–29.6 V at 1 mA - ensures reliable turn-on during overvoltage transients without premature conduction |
| Clamping Voltage (VC) | 38.9 V at 5.1 A IPPM - limits downstream IC voltage stress during 10/1000 μs surges |
| Capacitance (CD) | 244 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and industrial serial interfaces without signal distortion |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity for end-equipment compliance |
| Package | DO-219AB (SOD-123W compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling high-density PCB layouts |
| Thermal Resistance | 180 K/W (RthJA on 3 mm × 3 mm Cu pad) - supports sustained surge handling without thermal runaway |
Pinout & Package
SMF24A-HM3_A08 uses the DO-219AB (SMF) package: a two-terminal, cathode-marked, surface-mount plastic case with gull-wing leads. Dimensions are 3.9 mm length × 1.9 mm width × 1.08 mm height. The cathode bar identifies Terminal 2; Terminal 1 is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode) | Input/Line side connection | Connected to protected signal line; conducts during reverse-biased transient clamping |
| Terminal 2 (Cathode) | Ground reference path | Connected to system ground or low-impedance return; carries full surge current to earth |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and inductive switching spikes in industrial control systems |
| ±30 kV ESD immunity (IEC 61000-4-2) | Guarantees survivability of repeated human-body ESD events on exposed connectors without parameter shift |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including infotainment ports, sensor interfaces, and body electronics |
| Low 244 pF capacitance | Maintains signal rise/fall times <1 ns for high-speed digital interfaces up to 480 Mbps without jitter or attenuation |
| Wave and reflow solderable | Compatible with standard Pb-free reflow profiles (peak ≤260 °C), supporting automated manufacturing without lead damage |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D- differential pairs in portable USB hosts and peripherals from ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between each data line and ground to clamp transients before they reach the USB transceiver. Use Value: 244 pF capacitance avoids signal integrity degradation at 480 Mbps; 38.9 V clamping prevents damage to 3.3 V tolerant PHY circuitry. | Use Scenario: Safeguarding TMDS clock and data channels in HDMI source/sink devices against hot-plug and ESD events. IC Role / Device Role / Timing Role: Discrete ESD suppressor on each TMDS lane, mounted adjacent to the connector to minimize inductance. Use Value: Low clamping voltage (38.9 V) ensures HDMI 1.4/2.0 receivers remain within absolute maximum ratings during 8/20 μs surges. |
| Automotive Sensor Interfaces | Industrial I/O Modules |
Use Scenario: Protecting LIN bus or analog sensor inputs (e.g., temperature, pressure) in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines entering AEC-Q101-compliant microcontrollers or signal conditioners. Use Value: -65 °C to +175 °C operating range and AEC-Q101 qualification ensure reliability under under-hood thermal cycling and vibration. | Use Scenario: Shielding RS-485, CAN FD, or digital input terminals in programmable logic controllers (PLCs) and remote I/O systems. IC Role / Device Role / Timing Role: Primary transient suppressor on field-side signal traces, paired with series impedance for coordinated protection. Use Value: 200 W (10/1000 μs) rating handles repetitive surge events common in factory floor environments with motor drives and solenoids. |
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 | Higher clamping voltage (43.5 V), larger SMA (DO-214AC) package (4.5 × 2.7 mm), 3.5 A IPPM | Less suitable for space-constrained high-speed interfaces; better for lower-frequency power rails | Choose SMAJ24A-E3/57T only if board layout allows larger footprint and higher VC is acceptable for protected IC's voltage tolerance |
| TPD2E001DRYR | Bi-directional dual-channel array (0.9 pF/channel), 5 V VRWM, integrated 10 Ω series resistors | Designed for ultra-low-capacitance USB/DisplayPort; not rated for 24 V standby or high-power surges | Use TPD2E001DRYR for sub-5 V high-speed data paths where clamping voltage must be <10 V; avoid for 24 V industrial signal lines |
Compared with SMAJ24A-E3/57T and TPD2E001DRYR, SMF24A-HM3_A08 uniquely balances 24 V standoff, 38.9 V clamping, 244 pF capacitance, and DO-219AB compactness - making it optimal for mid-voltage industrial and automotive data interfaces requiring both ESD robustness and signal fidelity.
Availability
SMF24A-HM3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial RS-485 I/O modules requiring stable component supply and long-term manufacturability.
Supply support for SMF24A-HM3_A08 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power management, signal conditioning, and protection technologies.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-reliability ESD and surge protection in automotive, industrial, and consumer electronics where compact size and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMF24A-HM3_A08 at its rated peak pulse current?
The SMF24A-HM3_A08 has a maximum clamping voltage (VC) of 38.9 V at 5.1 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per the Electrical Characteristics table in Vishay's Document Number 85881 and ensures protected downstream ICs remain within safe voltage limits during surge events. The SMF24A-HM3_A08 achieves this with low incremental surge resistance and fast avalanche response.
Is SMF24A-HM3_A08 qualified to AEC-Q101?
Yes, the "HE3" in SMF24A-HM3_A08 indicates AEC-Q101 qualification per Vishay's ordering nomenclature. This certification confirms the SMF24A-HM3_A08 has passed stress tests for temperature cycling, humidity, mechanical shock, and ESD required for automotive electronics. The SMF24A-HM3_A08 is suitable for use in engine control, body electronics, and infotainment systems where automotive-grade reliability is mandatory.
What does the "_A08" suffix mean in SMF24A-HM3_A08?
The "_A08" suffix in SMF24A-HM3_A08 specifies packaging: 3000 pieces per 7-inch reel on 8 mm tape, with a minimum order quantity of 30,000 units. This matches Vishay's standard ordering code convention shown in the "Ordering Information" section of Document 85881. The SMF24A-HM3_A08 is supplied in moisture-sensitive level 1 (MSL-1) packaging compliant with J-STD-020, requiring no dry-pack or bake-out prior to assembly.
Can SMF24A-HM3_A08 replace SMAJ24A in existing designs?
SMF24A-HM3_A08 is not a direct pin-to-pin replacement for SMAJ24A due to different packages: SMF24A-HM3_A08 uses DO-219AB (3.9 × 1.9 mm), while SMAJ24A uses DO-214AC (4.5 × 2.7 mm). Layout changes are required. However, the SMF24A-HM3_A08 offers lower clamping voltage (38.9 V vs. 43.5 V) and smaller footprint - beneficial for high-density boards. Verify thermal dissipation and trace inductance in the new layout before migration.
What is the maximum operating temperature range for SMF24A-HM3_A08?
The SMF24A-HM3_A08 is rated for an operating temperature range of -65 °C to +175 °C, matching its storage temperature specification. This wide range supports deployment in under-hood automotive environments, industrial motor drives, and outdoor equipment. The junction temperature limit remains 175 °C, and thermal resistance (RthJA = 180 K/W) assumes mounting on a 3 mm × 3 mm copper pad - derating is required for smaller pads or elevated ambient temperatures.
SMF24A-HM3_A08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF24A-HM3_A08 FAQ
1.How can I place an order for SMF24A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF24A-HM3_A08 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_A08 reliable?
The price and inventory of SMF24A-HM3_A08 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_A08 is usually 5 days.
3.What payment methods are accepted for SMF24A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF24A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF24A-HM3_A08?
SMF24A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF24A-HM3_A08 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_A08?
For technical support, including SMF24A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF24A-HM3_A08 requirements.
6.How does Aetrix verify that SMF24A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF24A-HM3_A08 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_A08 meets industry standards.
7.What is the process for return or replacement of SMF24A-HM3_A08?
All SMF24A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF24A-HM3_A08, 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_A08 part is unused and in its original packaging.
Return procedure for SMF24A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF24A-HM3_A08 Tags
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