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Vishay SMF48A-HE3_A08
- Part No.:
- SMF48A-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF48A-HE3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,310
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Product details
Overview
SMF48A-HE3_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 48 V stand-off voltage (VRWM), 53.3–59 V reverse breakdown range (VBR), 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-HE3_A08 datasheet, SMF48A-HE3_A08 pinout, SMF48A-HE3_A08 application, or SMF48A-HE3_A08 equivalent, this device delivers verified low-capacitance ESD protection with AEC-Q101 qualification, SOD-123W-compatible footprint, and 200 W peak pulse power handling under 10/1000 μs waveform - critical for automotive infotainment and ruggedized industrial I/O design.
Technical Context
This diode operates as a unidirectional TVS (Transient Voltage Suppressor), leveraging silicon avalanche technology to clamp fast-rising ESD transients before they damage downstream ICs. Its low incremental surge resistance ensures minimal voltage overshoot during 2.6 A IPPM events, while its 161 pF junction capacitance maintains signal integrity on lines up to 480 Mbps.
The device is rated for continuous operation from –65 °C to +175 °C, with thermal resistance RthJA = 180 K/W on standard epoxy-glass PCBs. It meets AEC-Q101 stress tests including HBM >8 kV and IEC 61000-4-2 ±30 kV contact/air discharge - confirming suitability for automotive front-end electronics and harsh-environment industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 48 V - maximum continuous reverse voltage before leakage exceeds 0.1 µA; defines safe operating margin below clamping threshold. |
| Reverse Breakdown (VBR) | 53.3–59 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 77.4 V at 2.6 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 µs) - energy-handling capability for short-duration transients; sufficient for IEC 61000-4-2 and ISO 10605 surges. |
| Junction Capacitance (CD) | 161 pF at 0 V, 1 MHz - low enough to avoid signal degradation on USB 2.0 and CAN FD lines; measured per JEDEC JESD22-A114. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external filtering. |
| Operating Temperature | –65 °C to +175 °C - supports under-hood automotive, motor drive, and oil & gas instrumentation deployments. |
Pinout & Package
SMF48A-HE3_A08 uses the DO-219AB (SMF) package: low-profile, surface-mount, cathode-marked with a bar, compatible with SOD-123W footprint. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H). Mold compound is UL 94 V-0 rated; MSL level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protection path | Connected to protected line (e.g., USB D+); conducts surge current toward ground when clamped. |
| Cathode | Ground reference terminal | Connected to system ground plane; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond response time enables clamping before ESD pulse edge propagates into IC input stages. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HBM >8 kV, and mechanical shock testing. |
| Wave and reflow solderable | Compatible with standard Pb-free reflow profiles (peak ≤260 °C); no special process required for high-volume SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current transients, reducing risk of latch-up or gate oxide damage in protected ICs. |
| SOD-123W/SOD-123F footprint compatibility | Enables drop-in replacement in existing layouts using industry-standard 3.9 mm × 1.9 mm land patterns. |
Applications
| Automotive Infotainment Interface | Industrial Sensor Signal Line |
|---|---|
|
Use Scenario: Protecting HDMI and USB 2.0 ports in head unit displays 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 ESD energy to chassis ground. Use Value: 161 pF capacitance avoids signal rise-time degradation on 480 Mbps USB 2.0 lines; ±30 kV rating eliminates need for secondary ESD filters. |
Use Scenario: Safeguarding analog output (4–20 mA) and digital I²C lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-clamp TVS on sensor interface traces to suppress coupling from nearby motor drives and relay switching noise. Use Value: 48 V VRWM matches common 24 V industrial bus levels; 175 °C max junction temperature supports operation near heat-generating components. |
| Telecom Base Station Front-End | Medical Diagnostic Equipment Port |
|
Use Scenario: ESD protection for RS-485/RS-422 differential pairs in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Single-line TVS on each data line (A/B) referenced to local ground, providing primary-level transient suppression. Use Value: 200 W peak pulse power handles induced surges per IEC 61000-4-5; DO-219AB package withstands vibration and thermal cycling in uncontrolled environments. |
Use Scenario: Shielding USB and UART debug ports on MRI and ultrasound control units from operator-hand ESD during clinical use. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA @ 48 V) TVS ensuring no DC loading on diagnostic port logic, preserving signal fidelity. Use Value: AEC-Q101 qualification correlates with long-term reliability and reduced field failure rates in safety-critical medical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/57T | Higher clamping voltage (80 V vs. 77.4 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 200 W PPP same rating. | Less suitable for space-constrained USB/HDMI layouts due to 15% larger footprint and higher VC. | Select SMAJ48A-E3/57T only if board area allows and higher clamping margin is acceptable for protected IC VDD tolerance. |
| TPD4E05U06DQAR | Quad-channel, 0.5 pF/channel ultra-low capacitance, 5.5 V VRWM, integrated ESD array; not voltage-matched to 48 V systems. | Designed for high-speed digital buses (USB 3.0, PCIe), not medium-voltage analog/sensor lines requiring 48 V standoff. | Choose TPD4E05U06DQAR only for multi-line, sub-6 V interfaces where ultra-low CD is mandatory; not a functional substitute for SMF48A-HE3_A08. |
Compared with SMAJ48A-E3/57T and TPD4E05U06DQAR, SMF48A-HE3_A08 uniquely balances 48 V standoff, 161 pF capacitance, and DO-219AB compactness - making it optimal for single-line, medium-voltage industrial and automotive I/O where layout density and precise clamping are critical.
Availability
SMF48A-HE3_A08 is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor interfaces, and telecom front-end designs requiring stable component supply, AEC-Q101 compliance, and consistent low-capacitance ESD performance across production batches.
Supply support for SMF48A-HE3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets robust, low-profile ESD protection for high-speed and high-voltage interfaces - engineered specifically for AEC-Q101 compliance, minimal PCB footprint, and repeatable clamping behavior in harsh environments.
FAQ
What is the maximum clamping voltage of the SMF48A-HE3_A08 under standard test conditions?
The SMF48A-HE3_A08 has a maximum clamping voltage (VC) of 77.4 V when subjected to a 2.6 A peak pulse current with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table of Vishay's Document Number 85881 and reflects the highest voltage the protected circuit will experience during a defined transient event. The SMF48A-HE3_A08 maintains this clamping performance across its full operating temperature range.
Is SMF48A-HE3_A08 qualified for automotive applications?
Yes, SMF48A-HE3_A08 is AEC-Q101 qualified, having passed stress tests including human body model (HBM) >8 kV, temperature cycling, and mechanical shock. Its –65 °C to +175 °C operating range and DO-219AB package robustness make it suitable for under-dash, engine bay, and infotainment module deployments. The SMF48A-HE3_A08 part number explicitly includes the "HE3" AEC-Q101 qualification code per Vishay's ordering nomenclature.
What is the junction capacitance of SMF48A-HE3_A08, and how does it affect high-speed signal lines?
The SMF48A-HE3_A08 exhibits 161 pF typical junction capacitance at 0 V and 1 MHz, measured per standard test conditions. This value is low enough to avoid significant rise-time degradation on USB 2.0 (480 Mbps) and RS-485 lines, but not suitable for USB 3.0 or HDMI 2.0 where sub-1 pF is required. Designers must verify signal integrity using IBIS models or TDR measurements when integrating SMF48A-HE3_A08 into high-frequency paths.
Does SMF48A-HE3_A08 support lead-free reflow soldering?
Yes, SMF48A-HE3_A08 is fully compatible with lead-free reflow soldering processes, with a maximum peak temperature rating of 260 °C per J-STD-020. Its DO-219AB package is qualified for both wave and reflow soldering, and the device carries RoHS-compliant, tin-plated terminations. The SMF48A-HE3_A08 datasheet confirms full compliance with IPC/JEDEC standards for moisture sensitivity level (MSL) 1 handling.
How does the SMF48A-HE3_A08 differ from the SMF48A-E3-08 variant?
The SMF48A-HE3_A08 includes AEC-Q101 qualification ("H") and tape-and-reel packaging with 3K per 7″ reel ("A08"), whereas SMF48A-E3-08 lacks automotive qualification and uses standard commercial packaging. Both share identical electrical specs and DO-219AB package dimensions, but only SMF48A-HE3_A08 is approved for automotive use per Vishay's revision 2.4 datasheet. The SMF48A-HE3_A08 designation is therefore mandatory for Tier 1 automotive BOMs.
SMF48A-HE3_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-HE3_A08 FAQ
1.How can I place an order for SMF48A-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF48A-HE3_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-HE3_A08 reliable?
The price and inventory of SMF48A-HE3_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-HE3_A08 is usually 5 days.
3.What payment methods are accepted for SMF48A-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF48A-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF48A-HE3_A08?
SMF48A-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF48A-HE3_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-HE3_A08?
For technical support, including SMF48A-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF48A-HE3_A08 requirements.
6.How does Aetrix verify that SMF48A-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF48A-HE3_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-HE3_A08 meets industry standards.
7.What is the process for return or replacement of SMF48A-HE3_A08?
All SMF48A-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF48A-HE3_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-HE3_A08 part is unused and in its original packaging.
Return procedure for SMF48A-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF48A-HE3_A08 Tags
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