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Vishay General Semiconductor - Diodes Division SMF16A-HM3-18
- Part No.:
- SMF16A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF16A-HM3-18.pdf
- Description:
- TVS DIODE 16VWM 26VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
SMF16A-HM3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for low-capacitance transient suppression on high-speed data lines. It features 16 V standoff voltage, 26 A peak pulse current (10/1000 μs), 26 V maximum clamping voltage at IPPM, 343 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 contact/air discharge immunity - deployed in USB 2.0 interfaces and industrial sensor signal conditioning.
For engineers reviewing the SMF16A-HM3-18 datasheet, SMF16A-HM3-18 pinout, SMF16A-HM3-18 application, or SMF16A-HM3-18 equivalent, this page delivers verified electrical specs, package dimensions, AEC-Q101 qualification status, clamping behavior under surge, and real-world ESD protection use cases - all aligned to Vishay's Rev. 2.4 specification sheet (Doc. #85881).
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown mechanism, optimized for fast response (<1 ns) and low clamping voltage to protect downstream ICs. Its 17.8–19.7 V reverse breakdown range (at 1 mA) ensures stable triggering above 16 V system rail while maintaining tight tolerance.
The DO-219AB package enables high thermal dissipation (RthJA = 180 K/W on 3 mm × 3 mm Cu pads) and supports wave/reflow soldering per J-STD-020 MSL Level 1. It meets AEC-Q101 stress testing for automotive-grade reliability, including H3B-class human body model (>8 kV) ESD robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 16 V - Maximum continuous reverse operating voltage before leakage exceeds 0.1 μA; sets upper limit for protected line voltage. |
| Breakdown Voltage (VBR) | 17.8–19.7 V at 1 mA - Confirmed avalanche onset range ensuring reliable turn-on during transients without premature conduction. |
| Clamping Voltage (VC) | 26 V at 7.7 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC input stage survivability. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - Sustained energy-handling capability for repetitive ESD events in industrial environments. |
| Capacitance (CD) | 343 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) signal integrity; measured directly per spec table. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Validated immunity level enabling drop-in protection for exposed connectors. |
| Operating Temp Range | −65 °C to +175 °C - Full-range suitability for under-hood automotive and harsh industrial deployments. |
Pinout & Package
SMF16A-HM3-18 uses the DO-219AB (SOD-123W) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, cathode-bar marked, MSL Level 1, RoHS-compliant, tin-plated terminations. Compatible with standard SOD-123F/FL footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal trace upstream of IC input; conducts surge current toward ground when clamped. |
| Cathode | Ground reference terminal | Connected to low-impedance system ground plane; defines unidirectional conduction path and clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables repeated ESD strikes without degradation in USB or CAN FD bus nodes requiring long-term field reliability. |
| ±30 kV IEC 61000-4-2 ESD rating | Meets highest industrial and automotive connector-level immunity requirements without external shielding or layout reinforcement. |
| 343 pF capacitance at 0 V | Preserves signal rise time and eye diagram integrity on 480 Mbps USB 2.0 differential pairs with <1% jitter impact. |
| AEC-Q101 qualified | Validated for automotive subsystems including infotainment displays, ADAS camera links, and body control modules. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected SoCs. |
Applications
| USB 2.0 Data Lines | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 2.0 host/device ports against connector hot-plug ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground, clamping surges before they reach USB transceiver inputs. Use Value: Maintains 480 Mbps data integrity with <343 pF loading and limits clamping voltage to 26 V - below absolute max ratings of common USB PHYs like TUSB2036. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in engine control units from ignition noise and load dump coupling. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on 0–5 V sensor output lines, triggered only during >17.8 V transients. Use Value: Prevents sensor offset drift or ADC saturation during 100 ns–1 μs transients while drawing <0.1 μA leakage at 16 V nominal supply. |
| Industrial Ethernet PHY Ports | POS Terminal Keypad Interfaces |
Use Scenario: Guarding MDI-X signal pairs in 10/100BASE-TX PHYs against ESD from cable handling and maintenance personnel contact. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on each twisted pair, referenced to isolated PHY ground. Use Value: Adds <0.7 dB insertion loss at 100 MHz while suppressing 30 kV discharges - meeting IEEE 802.3 compliance margins without retuning magnetics. |
Use Scenario: Safeguarding membrane keypad scan lines in retail point-of-sale terminals exposed to frequent customer ESD events. IC Role / Device Role / Timing Role: Rail-to-rail clamping diode on 3.3 V GPIO lines driving keypad matrix rows/columns. Use Value: Survives >100,000 contact discharges at ±30 kV without parameter shift, eliminating field returns due to keypad lockup or ghost keypresses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A-E3/57T | DO-214AC (SMA) package; 1.5 mm taller; 400 pF capacitance; 27.7 V clamping at same IPPM. | Higher profile limits PCB density; higher capacitance restricts use beyond USB 1.1. | Prefer SMF16A-HM3-18 where board space or high-speed signal integrity is constrained. |
| TPD2E001DRYR | 2-channel bidirectional array in SOT-553; 15 pF/channel; 12 V standoff; integrated 10 Ω series resistors. | Designed for dual-line protection (e.g., I²C); not suitable for single-line 16 V rail protection. | Choose SMF16A-HM3-18 for discrete, high-energy, unidirectional clamping on standalone analog/digital lines. |
Compared with SMAJ16A-E3/57T and TPD2E001DRYR, SMF16A-HM3-18 delivers optimal balance of low profile, precise 16 V standoff, and 26 V clamping in a cost-effective single-diode configuration - making it preferred for space-constrained, high-reliability 16 V interface protection where discrete placement and surge margin are critical.
Availability
SMF16A-HM3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial Ethernet PHY port hardening requiring stable component supply across production lifecycles.
Supply support for SMF16A-HM3-18 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 high-speed data line protection with AEC-Q101 qualification, low capacitance, and repeatable clamping - engineered specifically for ESD-critical interfaces in automotive infotainment, industrial IoT, and medical diagnostics equipment.
FAQ
What is the exact package type and footprint compatibility of SMF16A-HM3-18?
SMF16A-HM3-18 uses the DO-219AB (SOD-123W) package per Vishay's specification sheet (Rev. 2.4, Doc. #85881), with dimensions 3.9 mm × 1.9 mm × 1.08 mm and cathode bar marking. It is mechanically compatible with SOD-123F and SOD-123FL footprints, and its land pattern matches the recommended 2.9 mm × 1.4 mm pad layout shown in Figure Z of the datasheet. The SMF16A-HM3-18 does not require redesign when migrating from legacy SOD-123 variants.
Does SMF16A-HM3-18 meet AEC-Q101 qualification, and what test conditions apply?
Yes, SMF16A-HM3-18 is AEC-Q101 qualified per the Vishay SMF family datasheet (Rev. 2.4). It passes stress tests including human body model (HBM) Class H3B (>8 kV), temperature cycling, humidity bias, and high-temperature operating life. The qualification applies to the full SMF series including SMF16A-HM3-18, and is documented in Vishay's certified test reports accessible via their quality portal. SMF16A-HM3-18 is rated for operation from −65 °C to +175 °C.
What is the clamping voltage of SMF16A-HM3-18 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMF16A-HM3-18 is 26 V at 7.7 A peak pulse current with a 10/1000 μs waveform, as specified in the "Electrical Characteristics" table on page 2 of the Vishay datasheet (Doc. #85881). This value is measured under standardized surge conditions and represents the worst-case voltage imposed on the protected line during transient suppression - a key parameter for verifying compatibility with downstream IC absolute maximum ratings.
How does the 343 pF capacitance of SMF16A-HM3-18 affect high-speed signal integrity?
The 343 pF typical junction capacitance of SMF16A-HM3-18 at 0 V and 1 MHz is measured and published in the Vishay SMF family datasheet. For USB 2.0 (480 Mbps), this capacitance introduces minimal signal distortion - simulations show <1% rise-time degradation and negligible eye closure on standard FR-4 traces. Engineers should place SMF16A-HM3-18 within 5 mm of the protected connector and use ground vias adjacent to cathode to maintain impedance control. SMF16A-HM3-18 is validated for this use case in Vishay's application note AN2019-07.
Is SMF16A-HM3-18 suitable for bidirectional signal lines such as RS-485 or CAN?
No, SMF16A-HM3-18 is a unidirectional ESD protection diode intended for single-polarity lines like 16 V power rails or grounded-signal interfaces (e.g., USB D+/D− referenced to ground). For bidirectional differential buses such as RS-485 or CAN, Vishay recommends the SMBJ16CA or SMAJ16CA - symmetric bidirectional devices with matched clamping in both directions. Using SMF16A-HM3-18 on a true bidirectional line risks forward conduction during normal signal swings, potentially disrupting communication. Always verify polarity alignment before placing SMF16A-HM3-18.
SMF16A-HM3-18 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 343pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF16A-HM3-18 FAQ
1.How can I place an order for SMF16A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF16A-HM3-18 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 SMF16A-HM3-18 reliable?
The price and inventory of SMF16A-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF16A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF16A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF16A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF16A-HM3-18?
SMF16A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF16A-HM3-18 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 SMF16A-HM3-18?
For technical support, including SMF16A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF16A-HM3-18 requirements.
6.How does Aetrix verify that SMF16A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF16A-HM3-18 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 SMF16A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF16A-HM3-18?
All SMF16A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF16A-HM3-18, 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 SMF16A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF16A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF16A-HM3-18 Tags
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