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Vishay SMF48A-HM3_A08
- Part No.:
- SMF48A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF48A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,349
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Product details
Overview
SMF48A-HM3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for transient voltage suppression in high-speed data lines. It features 48 V standoff voltage, 77.4 V maximum clamping voltage at 2.6 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 161 pF typical capacitance at 1 MHz - optimized for USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF48A-HM3_A08 datasheet, SMF48A-HM3_A08 pinout, SMF48A-HM3_A08 application, or SMF48A-HM3_A08 equivalent, key selection criteria include clamping performance under 2.6 A IPPM, low capacitance for signal integrity, AEC-Q101 qualification status, and compatibility with reflow soldering per J-STD-020 MSL level 1.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above VRWM = 48 V. Its low incremental surge resistance enables fast response (<1 ns) and tight clamping (VC = 77.4 V), critical for protecting 5 V–48 V rail-sensitive ICs like USB transceivers and CAN controllers.
The SMF48A-HM3_A08 uses the eSMP® platform with DO-219AB outline, supporting wave and reflow soldering. It meets AEC-Q101 stress tests including HBM >8 kV and IEC 61000-4-2 ±30 kV contact/air discharge - confirming suitability for automotive infotainment and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 48 V - maximum continuous reverse voltage before conduction begins; defines operating margin for 48 V nominal systems |
| Clamping Voltage (VC) | 77.4 V at IPPM = 2.6 A (10/1000 μs) - limits downstream IC stress during surge events |
| Peak Pulse Power | 200 W (10/1000 μs) - sustains short-duration surges without thermal failure |
| Capacitance (CD) | 161 pF at VR = 0 V, f = 1 MHz - low enough for <100 Mbps digital interfaces without signal degradation |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for end-equipment certification |
| Operating Temp Range | −65 °C to +175 °C - supports under-hood automotive and wide-temperature industrial deployment |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and HAST |
Pinout & Package
SMF48A-HM3_A08 uses the DO-219AB (SOD-123W) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, MSL level 1, compatible with standard 8 mm tape-and-reel handling. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal line; conducts surge current toward ground when clamped |
| Cathode | Ground reference | Connected to system ground plane; establishes clamping threshold relative to GND |
Key Features
| Feature | Design Value |
|---|---|
| Low-Noise Fast Response | Sub-nanosecond turn-on ensures clamping before sensitive ICs experience overvoltage |
| Reflow-Compatible Construction | Rated for peak solder temperature up to 260 °C - supports automated SMT assembly without degradation |
| High Surge Robustness | Withstands 50 A IFSM (8.3 ms half-sine) - handles repetitive load dump or inductive kick events |
| Thermal Stability | RthJA = 180 K/W on 3 mm × 3 mm Cu pads - enables reliable power dissipation in compact layouts |
Applications
| Automotive Infotainment | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting HDMI and USB 2.0 ports in head units against ESD from user interaction and cable hot-plug events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and PHY IC to shunt transients before they reach the interface controller. Use Value: 161 pF capacitance avoids signal rise-time degradation; ±30 kV ESD rating ensures compliance with ISO 10605 and CISPR 25 Class 5. | Use Scenario: Safeguarding 4–20 mA analog sensor inputs and RS-485 communication lines in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-clamp protection element on field-side signal traces to prevent latch-up or gate oxide damage in precision ADCs and transceivers. Use Value: 48 V VRWM matches common industrial supply rails; 77.4 V VC limits stress on 80 V-rated op-amps and isolators. |
| USB-C Port Protection | Power Supply Monitoring |
Use Scenario: Guarding CC, D+/D−, and VBUS lines in USB-C receptacles against electrostatic discharge during mating/unmating. IC Role / Device Role / Timing Role: Discrete ESD suppressor integrated into front-end filter network of USB-C controller ICs. Use Value: Low 161 pF capacitance preserves eye diagram integrity at 480 Mbps; DO-219AB footprint minimizes board area vs. larger SOD-323 alternatives. | Use Scenario: Protecting voltage monitoring inputs on DC-DC controllers and battery management ICs from load-dump spikes and relay bounce. IC Role / Device Role / Timing Role: Transient voltage suppressor on feedback divider or sense resistor node to maintain regulation accuracy during surges. Use Value: 200 W peak pulse power rating absorbs 12 V/24 V system-level transients; −65 °C to +175 °C range supports operation near power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/5A | DO-214AC (SMA) package; 1.5 mm taller; 250 W peak power; 100 pF capacitance | Better power handling but higher parasitic inductance; less suitable for >100 Mbps signals | Prefer SMAJ48A-E3/5A only when board space allows larger footprint and higher surge energy must be absorbed |
| TPD4E001DPYR | Quad-channel 0.5-pF ESD array in X2SON; 5.5 V VRWM; not 48 V rated | Designed for high-speed data lanes (USB 3.0, PCIe); incompatible for 48 V rail protection | Select TPD4E001DPYR only for low-voltage, multi-line digital interfaces - not as direct replacement for SMF48A-HM3_A08 |
Compared with SMAJ48A-E3/5A and TPD4E001DPYR, SMF48A-HM3_A08 uniquely balances 48 V standoff, 161 pF capacitance, and DO-219AB compactness - making it optimal for space-constrained 48 V industrial or automotive signal lines where both voltage rating and bandwidth matter.
Availability
SMF48A-HM3_A08 is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor interface, and USB-C port protection requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMF48A-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 Semiconductors is a global leader in discrete semiconductors, specializing in power management, sensing, and circuit protection components with emphasis on reliability and AEC-Q qualification.
The SMF series targets high-speed, high-reliability ESD protection for automotive and industrial applications - engineered for minimal capacitance, precise clamping, and robust surge endurance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMF48A-HM3_A08 at its rated peak pulse current?
The SMF48A-HM3_A08 has a maximum clamping voltage (VC) of 77.4 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 2.6 A. This value is measured per the Electrical Characteristics table in Vishay's Document Number 85881 Rev. 2.4 and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within safe operating voltage margins.
Is SMF48A-HM3_A08 qualified to AEC-Q101 standards?
Yes, SMF48A-HM3_A08 is AEC-Q101 qualified. The datasheet explicitly states "AEC-Q101 qualified available" for the SMF family, and the Absolute Maximum Ratings table confirms human body model (HBM) ESD rating >8 kV (Class H3B), along with full stress test compliance including temperature cycling, HTRB, and HAST. This qualification validates its use in automotive powertrain and infotainment systems per industry reliability requirements.
What package type does SMF48A-HM3_A08 use, and what are its key mechanical dimensions?
SMF48A-HM3_A08 uses the DO-219AB (SOD-123W) package: 3.9 mm length × 1.9 mm width × 1.08 mm height, with cathode indicated by a bar marking. Per Vishay's Package Data table and dimension drawing (Rev. 6, Feb. 2021), it features MSL level 1 moisture sensitivity and is rated for peak reflow temperatures up to 260 °C - enabling compatibility with standard lead-free SMT processes.
How does the 161 pF capacitance of SMF48A-HM3_A08 affect high-speed signal integrity?
The 161 pF typical capacitance of SMF48A-HM3_A08 at 1 MHz is measured under zero-bias conditions and represents worst-case parasitic loading. In practice, this value decreases significantly at operating reverse bias (e.g., ~40–60 pF at 48 V VR), making it suitable for USB 2.0 (480 Mbps) and RS-485 interfaces. Signal integrity impact is minimized by placing the device close to the connector and using controlled-impedance routing - confirmed by Vishay's application guidance for high-speed data line protection.
Can SMF48A-HM3_A08 replace older SMA or SMB package TVS diodes in existing designs?
SMF48A-HM3_A08 can replace SMA/SMB TVS diodes only if the PCB layout accommodates the DO-219AB footprint (3.9 mm × 1.9 mm) and thermal/mechanical constraints permit lower profile (1.08 mm height). While electrical specs align closely (e.g., VRWM = 48 V, VC = 77.4 V), the smaller size reduces thermal mass and alters solder joint geometry - requiring validation of surge endurance and reflow profile. Vishay confirms compatibility with SOD-123W, SOD-123F, and SOD-123FL outlines, but not direct drop-in for SMA/SMB land patterns.
SMF48A-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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 2.6A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 161pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF48A-HM3_A08 FAQ
1.How can I place an order for SMF48A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF48A-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 SMF48A-HM3_A08 reliable?
The price and inventory of SMF48A-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 SMF48A-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF48A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF48A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF48A-HM3_A08?
SMF48A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF48A-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 SMF48A-HM3_A08?
For technical support, including SMF48A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF48A-HM3_A08 requirements.
6.How does Aetrix verify that SMF48A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF48A-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 SMF48A-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF48A-HM3_A08?
All SMF48A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF48A-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 SMF48A-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF48A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF48A-HM3_A08 Tags
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