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Vishay SMF58A-HE3_A18
- Part No.:
- SMF58A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF58A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
SMF58A-HE3_A18 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 58 V stand-off voltage (VRWM), 95 A peak pulse current (IPPM), 95 V maximum clamping voltage (VC) at IPPM, ±30 kV IEC 61000-4-2 ESD immunity, and 144 pF typical capacitance at 0 V - ideal for protecting USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF58A-HE3_A18 datasheet, SMF58A-HE3_A18 pinout, SMF58A-HE3_A18 application, or SMF58A-HE3_A18 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 unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response (<1 ns) to electrostatic discharge events per IEC 61000-4-2. Its low incremental surge resistance ensures minimal voltage overshoot during transient events, while its 144 pF junction capacitance balances ESD robustness and high-frequency signal fidelity.
The SMF58A-HE3_A18 is rated for 200 W peak pulse power (10/1000 µs), 1000 W (8/20 µs), and supports operating temperatures from –65 °C to +175 °C. It meets AEC-Q101 stress test requirements for automotive-grade reliability and is qualified for reflow soldering up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 58 V - maximum continuous reverse voltage before significant leakage; defines minimum system operating margin before clamping activates |
| Clamping Voltage (VC) | 95 V at 95 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; critical for IC-level overvoltage survival |
| Peak Pulse Current (IPPM) | 95 A - maximum non-destructive surge current capability under standard 10/1000 µs waveform |
| Capacitance (CD) | 144 pF at 0 V, 1 MHz - directly impacts signal rise time and insertion loss in high-speed interfaces like USB 2.0 |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for industrial and automotive end-equipment |
| Package | DO-219AB (SOD-123W-compatible) - low-profile (1.08 mm height), wave/reflow solderable, MSL level 1 |
| Operating Temp | –65 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor infrastructure |
Pinout & Package
SMF58A-HE3_A18 uses the DO-219AB (SMF) package: 2-terminal, cathode-bar marked, low-profile surface-mount case with 3.9 mm × 1.9 mm footprint and 1.08 mm max height. Compatible with SOD-123W, SOD-123F, and SOD-123FL land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path during positive surges | Connected to protected line (e.g., USB D+); conducts when line voltage exceeds VRWM + VF |
| Cathode | Reference node tied to system ground or common return | Provides low-impedance path to GND for surge energy dissipation; marking bar identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 µs) | Enables robust protection against repetitive lightning-induced surges in industrial Ethernet and CAN FD nodes |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD staging in handheld test equipment and human-accessible ports |
| AEC-Q101 qualified option available | Validated for automotive infotainment and ADAS sensor interfaces requiring zero-failure field reliability |
| 144 pF capacitance at 0 V | Preserves signal integrity on 480 Mbps USB 2.0 lines without measurable eye diagram degradation |
| Low-profile DO-219AB package | Reduces board space and thermal mass vs. SMA/SMB, enabling dense routing in portable medical devices |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines in industrial docking stations exposed to frequent hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and chassis ground to clamp transients before reaching USB transceiver. Use Value: 144 pF capacitance avoids signal distortion at 480 Mbps; 95 V clamping prevents damage to 3.3 V tolerant PHY inputs. | Use Scenario: Safeguarding HDMI TMDS clock and data channels in automotive infotainment head units. IC Role / Device Role / Timing Role: Standoff-rated TVS on each differential pair, referenced to clean analog ground to suppress coupling noise. Use Value: ±30 kV ESD rating meets ISO 10605 requirements; DO-219AB footprint allows placement within tight HDMI trace spacing. |
| Automotive Sensor Interface | Industrial RS-485 Node |
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Low-leakage unidirectional clamp on signal line to battery ground, preserving DC accuracy. Use Value: 0.1 µA max reverse leakage at 58 V ensures no impact on millivolt-level sensor offsets; 175 °C junction rating supports under-hood use. | Use Scenario: Transient suppression on RS-485 A/B lines in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional pair (anode-to-line, cathode-to-GND) for asymmetric surge paths. Use Value: 200 W pulse rating handles induced surges from nearby motor switching; 95 V clamping stays below RS-485 receiver absolute max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/5A | Higher 1.5 mm profile (DO-214AC), 100 A IPPM, 93.6 V VC, 160 pF capacitance | Less suitable for ultra-thin consumer electronics; better for higher-energy surges | Select when board height >1.2 mm is acceptable and surge energy exceeds 200 W |
| TPSMD58A | Same DO-219AB package, 93 V VC, 100 A IPPM, but 170 pF capacitance and no AEC-Q101 option | Lacks automotive qualification; higher capacitance limits USB 2.0 use | Prefer for cost-sensitive industrial designs where AEC-Q101 is not required |
Compared with SMAJ58A-E3/5A and TPSMD58A, the SMF58A-HE3_A18 delivers optimal balance of low capacitance (144 pF), compact DO-219AB form factor, and AEC-Q101 availability - making it the preferred choice for space-constrained, high-reliability USB and automotive sensor protection.
Availability
SMF58A-HE3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor conditioning, and industrial RS-485 node design requiring stable component supply across long production lifecycles.
Supply support for SMF58A-HE3_A18 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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The SMF series is part of Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-speed data line protection with minimized capacitance and guaranteed AEC-Q101 qualification paths.
FAQ
What is the clamping voltage of SMF58A-HE3_A18 at its rated peak pulse current?
The SMF58A-HE3_A18 has a maximum clamping voltage (VC) of 95 V when subjected to its rated 95 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on the protected circuit during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMF58A-HE3_A18 qualified to AEC-Q101?
The SMF58A-HE3_A18 is offered in an AEC-Q101 qualified version; however, the specific suffix "HE3_A18" denotes tape-and-reel packaging (10K per 13″ reel) and RoHS-compliant terminations, not qualification status. To confirm AEC-Q101 compliance, the part must be ordered with the "-HE3_A18Q" suffix or verified via Vishay's official qualification reports - SMF58A-HE3_A18 itself is not automatically qualified unless explicitly specified.
What does the "HE3_A18" suffix mean in SMF58A-HE3_A18?
The "HE3_A18" suffix in SMF58A-HE3_A18 indicates: "H" = AEC-Q101 qualified (optional), "E3" = lead (Pb)-free, RoHS-compliant terminations, and "_A18" = 10,000-piece tape-and-reel packaging on a 13-inch reel (8 mm tape). The underscore and "A18" follow Vishay's standard packaging code convention for high-volume automated assembly.
Can SMF58A-HE3_A18 be used for bidirectional protection?
No - SMF58A-HE3_A18 is a unidirectional TVS diode, designed only for clamping positive transients relative to ground. For bidirectional protection (e.g., AC-coupled lines or symmetric surges), two SMF58A-HE3_A18 devices must be connected in series opposition, or a dedicated bidirectional part such as SMBJ58A should be selected instead.
What is the thermal resistance (RthJA) of SMF58A-HE3_A18 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF58A-HE3_A18 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 µm thick. This value assumes standard JEDEC test conditions and is essential for calculating junction temperature rise under sustained leakage or repetitive surge conditions - especially in high-temperature environments like automotive under-hood applications.
SMF58A-HE3_A18 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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 95V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 144pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF58A-HE3_A18 FAQ
1.How can I place an order for SMF58A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF58A-HE3_A18 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 SMF58A-HE3_A18 reliable?
The price and inventory of SMF58A-HE3_A18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF58A-HE3_A18 is usually 5 days.
3.What payment methods are accepted for SMF58A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF58A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF58A-HE3_A18?
SMF58A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF58A-HE3_A18 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 SMF58A-HE3_A18?
For technical support, including SMF58A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF58A-HE3_A18 requirements.
6.How does Aetrix verify that SMF58A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF58A-HE3_A18 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 SMF58A-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF58A-HE3_A18?
All SMF58A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF58A-HE3_A18, 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 SMF58A-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF58A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF58A-HE3_A18 Tags
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