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Vishay General Semiconductor - Diodes Division SMF22A-M3-08
- Part No.:
- SMF22A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF22A-M3-08.pdf
- Description:
- TVS DIODE 22VWM 35.5VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:6,520
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Product details
Overview
SMF22A-M3-08 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 and power rails. It features a 22 V standoff voltage (VRWM), 35.5 A peak pulse current (IPPM) under 10/1000 μs waveform, 271 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment USB interfaces to safeguard USB 2.0 signal integrity.
For engineers reviewing the SMF22A-M3-08 datasheet, SMF22A-M3-08 pinout, SMF22A-M3-08 application, or SMF22A-M3-08 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior, AEC-Q101 qualification status, and real-world ESD protection use cases - all aligned with Vishay's Rev. 2.4 (04-Jul-2023) specification for the SMF family.
Technical Context
This diode operates as a single-channel unidirectional TVS device with avalanche breakdown clamping action. Its low incremental surge resistance enables fast response (<1 ns rise time per IEC 61000-4-2) and tight clamping (VC = 35.5 V max at IPPM), critical for protecting 22 V-rated circuits against EFT and lightning-induced surges.
The SMF22A-M3-08 uses silicon planar technology with "Low Noise" design, achieving stable reverse leakage (<0.1 μA at VRWM) and junction temperature operation up to +175 °C. It is qualified to AEC-Q101 and compatible with SOD-123W/SOD-123F footprint layouts, supporting wave and reflow soldering per J-STD-020 MSL level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe interface voltage margin for 24 V nominal systems. |
| Breakdown Voltage (VBR) | 24.4–27.0 V at 1 mA - ensures reliable avalanche conduction onset above system operating voltage without premature triggering. |
| Peak Pulse Current (IPPM) | 5.6 A at 10/1000 μs - sustains 200 W transient power dissipation while limiting voltage overshoot during ESD events. |
| Clamping Voltage (VC) | 35.5 V max at IPPM - limits downstream IC stress to <1.6× VRWM, preserving logic-level compatibility in 24 V control circuits. |
| Capacitance (CD) | 271 pF at 0 V, 1 MHz - optimized for low-speed power/signal line protection; avoids signal distortion on lines ≤10 Mbps. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds automotive and industrial immunity requirements for exposed connectors. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV, enabling use in under-hood and infotainment modules. |
Pinout & Package
SMF22A-M3-08 is housed in the DO-219AB (SMF) package: low-profile (1.08 mm height), molded epoxy case with cathode bar marking, compatible with SOD-123W footprint. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H). Moisture sensitivity level (MSL) is 1, rated for peak reflow temperature of 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input/line side terminal | Connected to protected signal or power line; conducts surge current toward cathode during overvoltage events. |
| Cathode (Pin 2) | Ground/reference terminal | Connected to system ground or low-impedance return path; establishes clamping reference and enables bidirectional discharge path in unidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive EFT bursts in industrial PLC I/O modules without thermal runaway. |
| ±30 kV IEC 61000-4-2 ESD immunity | Meets highest-tier contact/air discharge requirements for automotive USB Type-A ports and CAN transceiver inputs. |
| AEC-Q101 qualification | Validates long-term reliability under thermal cycling, humidity, and mechanical shock for automotive production deployment. |
| Low-profile DO-219AB package | Reduces PCB footprint vs. SMA/SMB; supports automated placement and high-density routing in compact ECUs. |
| 271 pF capacitance at 0 V | Balances ESD robustness and signal integrity for 24 V sensor supply lines and LIN bus interfaces. |
Applications
| Automotive Infotainment USB Port | Industrial 24 V Sensor Power Line |
|---|---|
Use Scenario: Protects USB 2.0 D+/D− lines in head unit front-panel connectors exposed to user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between data line and chassis ground to clamp transients before reaching USB PHY. Use Value: Limits clamping voltage to 35.5 V, preventing damage to 3.3 V tolerant USB transceivers while maintaining signal rise/fall times. |
Use Scenario: Shields 24 V supply input to pressure/temperature sensors in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on main VCC rail, triggered only during load dump or inductive switching spikes. Use Value: Withstands 5.6 A surge current and 200 W pulses without degradation, ensuring sensor uptime during motor drive switching noise. |
| Automotive Body Control Module (BCM) | Medical Patient Monitor Power Input |
Use Scenario: Safeguards LIN bus transceiver power pins in door module ECUs subjected to cable harness ESD coupling. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on 12 V/24 V VBAT rail feeding LIN PHY ICs. Use Value: 271 pF capacitance avoids LIN signal edge rounding; ±30 kV rating covers worst-case assembly-line ESD exposure. |
Use Scenario: Protects isolated 24 V DC input stage of bedside patient monitors against hospital-grade ESD events. IC Role / Device Role / Timing Role: Primary overvoltage protector on secondary-side power entry, upstream of DC/DC converter. Use Value: AEC-Q101 qualification ensures compliance with IEC 60601-1-2 ESD immunity requirements for Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Higher clamping voltage (41.4 V), larger SMA package (4.5 mm × 2.7 mm), 3.5 A IPPM (10/1000 μs). | Less suitable for space-constrained automotive modules; better for higher-energy surges where board area allows. | Select SMAJ22A-E3/57T only if PCB layout permits larger footprint and system can tolerate higher VC. |
| TPSMF22A | Same DO-219AB package, identical VRWM/VC/IPPM specs, but not AEC-Q101 qualified; RoHS-compliant, no lead-free exemption. | Limited to commercial/industrial use; excluded from automotive production due to missing AEC-Q101 validation. | Choose TPSMF22A for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMAJ22A-E3/57T and TPSMF22A, SMF22A-M3-08 uniquely combines AEC-Q101 qualification, DO-219AB miniaturization, and 35.5 V clamping - making it the preferred choice for automotive ECU power and data line protection where reliability, size, and low clamping voltage are jointly critical.
Availability
SMF22A-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial 24 V sensor interfaces, and medical device power inputs requiring stable component supply across extended production lifecycles.
Supply support for SMF22A-M3-08 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 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, space-constrained ESD protection in automotive and industrial environments - engineered for AEC-Q101 compliance, low clamping, and SMT manufacturability in DO-219AB packaging.
FAQ
What is the clamping voltage of SMF22A-M3-08 at its rated peak pulse current?
The SMF22A-M3-08 has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 5.6 A under the 10/1000 μs waveform. This value is measured per Vishay's Rev. 2.4 datasheet and ensures downstream circuitry remains within safe voltage margins during transient events. The SMF22A-M3-08 achieves this performance using low incremental surge resistance and optimized silicon junction design.
Is SMF22A-M3-08 qualified to AEC-Q101?
Yes, SMF22A-M3-08 is explicitly AEC-Q101 qualified per Vishay's documentation, including human body model (HBM) testing >8 kV (Class H3B). This qualification validates its suitability for automotive applications such as body control modules and infotainment systems. The SMF22A-M3-08 meets all required stress tests - thermal cycling, humidity, and mechanical shock - confirming reliability in harsh vehicle environments.
What package type does SMF22A-M3-08 use, and is it compatible with standard SMT processes?
SMF22A-M3-08 uses the DO-219AB (SMF) package - a low-profile surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with standard wave and reflow soldering per J-STD-020 MSL level 1, with peak temperature tolerance up to 260 °C. The SMF22A-M3-08 footprint aligns with SOD-123W land patterns, enabling drop-in replacement in existing layouts.
How does the capacitance of SMF22A-M3-08 affect its use in signal lines?
SMF22A-M3-08 exhibits 271 pF typical capacitance at 0 V and 1 MHz, making it appropriate for low-to-medium speed signal lines (e.g., LIN, RS-485, 24 V sensor outputs) but not high-speed interfaces like USB 3.0 or HDMI. This capacitance level minimizes signal distortion while maintaining effective ESD clamping. For the SMF22A-M3-08, the trade-off between robustness and bandwidth is intentionally optimized for automotive power and control signals.
What is the standoff voltage (VRWM) and why is it important for SMF22A-M3-08 selection?
The standoff voltage (VRWM) of SMF22A-M3-08 is 22 V - the maximum continuous reverse voltage it can withstand without significant leakage current (<0.1 μA). This parameter ensures the SMF22A-M3-08 remains non-conductive during normal operation in 24 V systems, avoiding power loss or false triggering. Selecting a VRWM ≥110 % of nominal line voltage prevents nuisance conduction while preserving headroom for ripple and tolerance.
SMF22A-M3-08 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 5.6A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 271pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF22A-M3-08 FAQ
1.How can I place an order for SMF22A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF22A-M3-08 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 SMF22A-M3-08 reliable?
The price and inventory of SMF22A-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF22A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF22A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF22A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF22A-M3-08?
SMF22A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF22A-M3-08 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 SMF22A-M3-08?
For technical support, including SMF22A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF22A-M3-08 requirements.
6.How does Aetrix verify that SMF22A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF22A-M3-08 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 SMF22A-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF22A-M3-08?
All SMF22A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF22A-M3-08, 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 SMF22A-M3-08 part is unused and in its original packaging.
Return procedure for SMF22A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF22A-M3-08 Tags
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