My Inquiry
My Account
Vishay SMF45A-HM3_A08
- Part No.:
- SMF45A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF45A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,861
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF45A-HM3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for high-speed data lines requiring ±30 kV IEC 61000-4-2 contact/air discharge immunity, 45 V stand-off voltage, 72.7 V maximum clamping voltage at 2.8 A peak pulse current, and 162 pF typical capacitance at 1 MHz.
For engineers reviewing the SMF45A-HM3_A08 datasheet, SMF45A-HM3_A08 pinout, SMF45A-HM3_A08 application, or SMF45A-HM3_A08 equivalent, this device serves as a low-capacitance transient voltage suppressor for USB 2.0, HDMI, Ethernet PHY interfaces, and automotive infotainment signal lines where fast response, AEC-Q101 qualification, and SOD-123W-compatible footprint are critical.
Technical Context
This diode operates as a unidirectional clamping device with a cathode-anode configuration, leveraging silicon avalanche technology to limit transient overvoltages before they damage downstream ICs. Its 162 pF capacitance at 0 V and <1 ns response time enable use on high-speed digital buses without signal integrity degradation.
The SMF45A-HM3_A08 meets AEC-Q101 stress requirements for human body model (>8 kV), supports wave and reflow soldering per J-STD-020 MSL level 1, and delivers 200 W peak pulse power (10/1000 μs) with low incremental surge resistance for robust clamping performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 45 V - Maximum continuous reverse operating voltage before leakage exceeds 0.1 μA |
| Clamping Voltage (VC) | 72.7 V at 2.8 A - Peak voltage seen by protected circuit during 10/1000 μs surge |
| Capacitance (CD) | 162 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) and HDMI 1.4 signal integrity |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Full system-level ESD immunity without external shielding |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile footprint for space-constrained PCBs |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including infotainment and ADAS sensor interfaces |
| Thermal Resistance (RthJA) | 180 K/W - Enables operation up to +175 °C junction temperature on standard FR-4 with 3 mm × 3 mm Cu pads |
Pinout & Package
SMF45A-HM3_A08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm length, 1.9 mm width, 1.08 mm height, molded UL 94 V-0 compound, MSL level 1, peak reflow temperature 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked bar) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VRWM |
| Anode | Reference node | Typically tied to system ground; completes clamping path during ESD event |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise fast response | Sub-nanosecond turn-on enables protection of high-speed serial links without jitter or attenuation |
| AEC-Q101 qualification | Validated for automotive under-hood and cabin environments per stress test requirements |
| 200 W peak pulse power | Sustains 10/1000 μs transients common in industrial and automotive load-dump scenarios |
| Reflow/wave solder compatible | Qualified for standard SMT processes including lead-free reflow up to 260 °C peak |
| Low profile DO-219AB | Enables placement adjacent to connectors and high-density BGA ICs without height interference |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable USB host/device ports against ESD events during cable insertion. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between data line and ground, with cathode on signal line. Use Value: 162 pF capacitance ensures <0.5% signal rise-time degradation at 480 Mbps, preserving eye diagram integrity. | Use Scenario: Safeguarding TMDS clock and data channels in flat-panel display controllers against hot-plug ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS diode shunting transients to ground while maintaining DC bias on active lines. Use Value: 72.7 V clamping voltage prevents HDMI receiver input damage during ±30 kV contact discharge events. |
| Automotive Infotainment Display | Ethernet PHY Interface Protection |
Use Scenario: Shielding LVDS or FPD-Link III video bus traces running from head unit to center display in vehicles. IC Role / Device Role / Timing Role: High-reliability ESD suppressor qualified per AEC-Q101 for under-dash temperature cycling and vibration. Use Value: 175 °C max junction temperature rating supports operation in sealed enclosures near heat sources. | Use Scenario: Protecting 100BASE-TX or 1000BASE-T PHY pins from ESD during board handling and connector mating. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed on each twisted pair before magnetics. Use Value: 45 V VRWM allows compatibility with 3.3 V or 5 V PHY supply rails while clamping below absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/57T | Higher 1000 W peak power (8/20 μs), larger SMA package (4.5 mm × 2.7 mm), 190 pF capacitance | Better suited for power-line surges; less suitable for high-speed data due to higher capacitance and size | Select SMAJ45A-E3/57T only if 8/20 μs lightning surge immunity is required and board space permits larger footprint. |
| TPD2E001DRYR | 2-channel array, 12 pF per channel, 5 V VRWM, not AEC-Q101 qualified, SC-70 package | Optimized for low-capacitance USB/SDIO; lacks automotive qualification and 45 V standoff capability | Choose TPD2E001DRYR for cost-sensitive consumer USB ports where AEC-Q101 and 45 V standoff are unnecessary. |
Compared with SMAJ45A-E3/57T and TPD2E001DRYR, SMF45A-HM3_A08 uniquely balances 45 V standoff, 162 pF capacitance, AEC-Q101 qualification, and DO-219AB miniaturization-making it optimal for automotive-grade high-speed data line protection where space, speed, and reliability intersect.
Availability
SMF45A-HM3_A08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for SMF45A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection, delivering AEC-Q101-qualified, low-capacitance TVS diodes optimized for USB, HDMI, Ethernet, and automotive serial buses where signal fidelity and ruggedness are co-required.
FAQ
What is the maximum clamping voltage of the SMF45A-HM3_A08 under a 10/1000 μs surge?
The SMF45A-HM3_A08 has a maximum clamping voltage (VC) of 72.7 V at 2.8 A peak pulse current under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMF45A-HM3_A08 maintains this clamping performance while delivering 200 W peak pulse power, ensuring downstream ICs remain within safe operating limits.
Is SMF45A-HM3_A08 qualified for automotive applications?
Yes, SMF45A-HM3_A08 is AEC-Q101 qualified, having passed stress tests including human body model ESD (>8 kV), temperature cycling, and high-temperature operating life. It is rated for operation from −65 °C to +175 °C junction temperature and is commonly deployed in automotive infotainment, ADAS camera links, and body control modules. The SMF45A-HM3_A08 meets automotive reliability standards without derating in typical under-dash thermal environments.
What is the capacitance of SMF45A-HM3_A08 and how does it affect high-speed signal integrity?
The SMF45A-HM3_A08 exhibits 162 pF typical capacitance at 0 V and 1 MHz. This low value minimizes loading on high-speed signals: for USB 2.0 (480 Mbps), it introduces <0.5% rise-time degradation, preserving eye opening and jitter margins. The capacitance decreases with increasing reverse bias, further reducing impact during normal operation. Engineers using SMF45A-HM3_A08 in HDMI or LVDS designs benefit from this balance of ESD robustness and signal fidelity.
Does SMF45A-HM3_A08 support automated SMT assembly?
Yes, SMF45A-HM3_A08 is fully compatible with standard surface-mount assembly processes, including lead-free reflow soldering up to 260 °C peak temperature and wave soldering. Its DO-219AB package meets J-STD-020 moisture sensitivity level 1 and features UL 94 V-0 molding compound. The cathode bar marking and tape-and-reel packaging (8 mm tape, 3K per 7″ reel) ensure reliable pick-and-place accuracy. SMF45A-HM3_A08 requires no special stencil or reflow profile beyond IPC-J-STD-020 Class 3 guidelines.
How does the SMF45A-HM3_A08 compare to the SMF43A and SMF48A variants?
The SMF45A-HM3_A08 sits between SMF43A (43 V VRWM, 69.4 V VC) and SMF48A (48 V VRWM, 77.4 V VC) in the SMF family. Its 45 V stand-off voltage provides tighter margin above 3.3 V/5 V logic rails than SMF48A, while offering higher surge tolerance than SMF43A. All three share identical DO-219AB packaging, AEC-Q101 qualification, and 162–161 pF capacitance. Selection depends on system voltage margin: SMF45A-HM3_A08 is optimal for 40–46 V nominal rail protection where clamping headroom and ESD immunity must coexist.
SMF45A-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 162pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF45A-HM3_A08 FAQ
1.How can I place an order for SMF45A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF45A-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 SMF45A-HM3_A08 reliable?
The price and inventory of SMF45A-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 SMF45A-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF45A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF45A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF45A-HM3_A08?
SMF45A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF45A-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 SMF45A-HM3_A08?
For technical support, including SMF45A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF45A-HM3_A08 requirements.
6.How does Aetrix verify that SMF45A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF45A-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 SMF45A-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF45A-HM3_A08?
All SMF45A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF45A-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 SMF45A-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF45A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF45A-HM3_A08 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
