My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMF26A-HM3-08
- Part No.:
- SMF26A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF26A-HM3-08.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:29,989
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF26A-HM3-08 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 26 V stand-off voltage (VRWM), 42.1 V maximum clamping voltage at 4.8 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs). It is used to safeguard USB 2.0, HDMI, and industrial sensor interfaces against electrostatic discharge.
For engineers reviewing the SMF26A-HM3-08 datasheet, SMF26A-HM3-08 pinout, SMF26A-HM3-08 application, or SMF26A-HM3-08 equivalent, key selection criteria include clamping voltage margin relative to IC I/O rail, capacitance impact on signal integrity (<230 pF at 0 V), AEC-Q101 qualification status, SOD-123W-compatible footprint, and thermal resistance (180 K/W) under standard PCB mounting.
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response (<1 ns) and low incremental surge resistance. Its junction temperature range spans –65 °C to +175 °C, and it meets IEC 61000-4-2 (±30 kV contact/air) and AEC-Q101 Class H3B (>8 kV HBM) requirements.
The SMF26A-HM3-08 uses silicon planar technology with low-noise design to minimize parasitic capacitance and ensure stable clamping performance across its full operating temperature range. It is rated for 1000 W peak pulse power under IEC 61000-4-5 (8/20 μs) and supports wave/reflow soldering per J-STD-020 MSL level 1 conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 26 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected line voltage. |
| Clamping Voltage (VC) | 42.1 V max at IPPM = 4.8 A - Peak voltage seen by downstream IC during 10/1000 μs surge; defines protection margin. |
| Peak Pulse Power | 200 W (10/1000 μs) - Sustains short-duration transients without failure; derates with duty cycle and ambient temperature. |
| Capacitance | 230 pF at VR = 0 V, f = 1 MHz - Impacts high-frequency signal integrity; suitable for ≤100 Mbps interfaces. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Validates robustness against common human-body ESD events. |
| Operating Temp Range | –65 °C to +175 °C - Enables use in under-hood automotive, industrial control, and outdoor equipment. |
| Thermal Resistance | 180 K/W (RthJA, 3 mm × 3 mm Cu pads) - Determines junction temperature rise under sustained leakage or surge conditions. |
Pinout & Package
The SMF26A-HM3-08 is housed in the DO-219AB (SMF) package - a low-profile, surface-mount case compatible with SOD-123W, SOD-123F, and SOD-123FL footprints. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal line requiring protection; conducts during positive transients when cathode is biased higher. |
| Cathode | Ground reference | Connected to system ground or low-impedance return path; defines unidirectional conduction direction and clamping reference. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 42.1 V max ensures protected IC I/O stays below absolute maximum ratings during 4.8 A surges. |
| Ultra-low profile | 1.08 mm height enables use in space-constrained portable and automotive modules. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body electronics per stress test requirements. |
| Reflow/wave solder compatible | Rated for peak reflow temperatures up to 260 °C, supporting automated PCB assembly without degradation. |
| Low-noise fast response | Sub-nanosecond turn-on time minimizes voltage overshoot during ESD events on high-speed lines. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D– lines of USB 2.0 ports against ESD events during cable insertion or handling. IC Role / Device Role: Unidirectional TVS diode placed between signal line and ground to clamp transients before they reach the USB transceiver. Use Value: 230 pF capacitance avoids signal distortion at 480 Mbps; 42.1 V clamping keeps voltage below 5.5 V tolerant I/O limits of USB PHYs. | Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 receivers against contact discharge near connectors. IC Role / Device Role: Standoff-rated TVS on each differential pair to suppress ESD without degrading 165 MHz pixel clock integrity. Use Value: Low 1.08 mm profile fits tight HDMI connector spacing; ±30 kV rating exceeds IEC 61000-4-2 requirement for consumer electronics. |
| Automotive Sensor Interface | Industrial RS-485 Transceiver Port |
Use Scenario: Protecting analog outputs of pressure or temperature sensors in engine control units exposed to under-hood ESD. IC Role / Device Role: Single-channel unidirectional suppressor on sensor output line referenced to chassis ground. Use Value: –65 °C to +175 °C operation supports direct placement near hot components; AEC-Q101 qualification confirms reliability. | Use Scenario: Shielding RS-485 driver/receiver pins from ESD in factory automation gateways with frequent field wiring changes. IC Role / Device Role: Discrete TVS on A/B bus lines to prevent latch-up or damage during hot-plug events. Use Value: 200 W pulse rating handles multiple surge events; 26 V VRWM matches typical 24 V industrial bus common-mode range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Higher clamping voltage (47.3 V), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm), 400 W peak power (10/1000 μs). | Less suitable for space-constrained layouts; better for higher-energy surges where board area allows. | Select SMAJ26A-E3/57T only if higher surge energy handling is required and footprint constraints permit. |
| TPD2E001DRSR | Bi-directional dual-channel array (20 pF/channel), 5 V VRWM, integrated 0.5 Ω series resistors, 0.65 mm × 0.65 mm DFN. | Designed for ultra-high-speed digital interfaces (e.g., USB 3.0); not rated for 26 V lines or AEC-Q101. | Choose TPD2E001DRSR for low-capacitance, multi-line protection on 3.3 V logic; avoid for 24 V industrial or automotive signal lines. |
Compared with SMAJ26A-E3/57T and TPD2E001DRSR, the SMF26A-HM3-08 offers optimal balance of compact DO-219AB size, 26 V standoff, AEC-Q101 compliance, and 230 pF capacitance-making it ideal for automotive and industrial 24 V interface protection where board space and reliability are critical.
Availability
SMF26A-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified ESD protection.
Supply support for SMF26A-HM3-08 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 semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in TVS diodes, MOSFETs, and precision resistors.
The SMF series belongs to Vishay's eSMP® family of surface-mount ESD protection devices, engineered specifically for high-reliability automotive and industrial applications demanding AEC-Q101 qualification, low profile, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of the SMF26A-HM3-08 under standard test conditions?
The SMF26A-HM3-08 has a maximum reverse clamping voltage (VC) of 42.1 V when subjected to a 10/1000 μs surge current of 4.8 A. This value is measured per IEC 61000-4-5 and defines the peak voltage imposed on the protected circuit during transient events. The SMF26A-HM3-08 maintains this clamping performance across its full operating temperature range of –65 °C to +175 °C.
Is the SMF26A-HM3-08 qualified to AEC-Q101 standards?
Yes, the SMF26A-HM3-08 is AEC-Q101 qualified and rated for Class H3B human body model (HBM) ESD immunity (>8 kV). This qualification confirms its suitability for automotive applications including engine control, body electronics, and infotainment systems. The SMF26A-HM3-08 undergoes stress testing per AEC-Q101 Rev D, including temperature cycling, humidity bias, and mechanical shock.
What package type does the SMF26A-HM3-08 use, and is it compatible with standard SOD-123 footprints?
The SMF26A-HM3-08 uses the DO-219AB (SMF) package - a low-profile, surface-mount case measuring 3.9 mm × 1.9 mm × 1.08 mm. It is explicitly stated as compatible with SOD-123W, SOD-123F, and SOD-123FL package outlines. While footprint dimensions differ slightly, the SMF26A-HM3-08 can be mounted using modified SOD-123 land patterns with adjusted pad length and solder mask openings per Vishay's recommended footprint.
What is the typical junction-to-ambient thermal resistance (RthJA) for the SMF26A-HM3-08?
The SMF26A-HM3-08 has a thermal resistance RthJA of 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value assumes natural convection cooling and is critical for estimating junction temperature rise under sustained leakage or repetitive surge conditions. Derating is required for smaller pads or higher ambient temperatures.
Does the SMF26A-HM3-08 support both contact and air discharge ESD protection per IEC 61000-4-2?
Yes, the SMF26A-HM3-08 provides ±30 kV ESD immunity for both contact discharge and air discharge per IEC 61000-4-2 (10 pulses each). This rating is verified during AEC-Q101 qualification and applies across the full operating temperature range. The device achieves this performance via low-noise silicon planar construction and optimized junction geometry, ensuring consistent response time <1 ns.
SMF26A-HM3-08 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 230pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF26A-HM3-08 FAQ
1.How can I place an order for SMF26A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF26A-HM3-08 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 SMF26A-HM3-08 reliable?
The price and inventory of SMF26A-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF26A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF26A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF26A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF26A-HM3-08?
SMF26A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF26A-HM3-08 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 SMF26A-HM3-08?
For technical support, including SMF26A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF26A-HM3-08 requirements.
6.How does Aetrix verify that SMF26A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF26A-HM3-08 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 SMF26A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF26A-HM3-08?
All SMF26A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF26A-HM3-08, 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 SMF26A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF26A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF26A-HM3-08 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
