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Vishay General Semiconductor - Diodes Division SMA6F33A-M3/H
- Part No.:
- SMA6F33A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F33A-M3/H.pdf
- Description:
- 600W,33V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:13,191
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Product details
Overview
SMA6F33A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.1 V maximum clamping voltage (VC) at 11.3 A (10/1000 μs), 600 W peak pulse power rating, and ESD immunity per IEC 61000-4-2 level 4 (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F33A-M3/H datasheet, SMA6F33A-M3/H pinout, SMA6F33A-M3/H application, or SMA6F33A-M3/H equivalent, this device is selected for robust overvoltage protection in space-constrained industrial sensor interfaces, automotive body electronics, and telecom line drivers where low-profile mounting and high surge current handling are critical.
Technical Context
This TVS diode operates as a unidirectional Zener-clamped transient suppressor, activated when reverse voltage exceeds VBR and clamping to VC under defined surge conditions. Its junction temperature range spans –55 °C to +175 °C, with thermal resistance RθJA of 120–150 °C/W on FR4 PCB and RθJM of 12–15 °C/W to mount.
The device uses silicon planar construction with matte tin-plated leads compliant to J-STD-002 and JESD22-B102, meets MSL level 1 per J-STD-020, and is halogen-free, RoHS-compliant, and industrial grade (M3 suffix). Polarity is marked by cathode band; anode and cathode terminals define unidirectional conduction path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Breakdown threshold range defining turn-on consistency across temperature and unit variation |
| VC @ IPP | 53.1 V at 11.3 A (10/1000 μs) - Clamped voltage during standard surge event; determines protected circuit's maximum stress |
| PPPM (10/1000 μs) | 600 W - Peak transient energy absorption capability under standardized long-duration surge waveform |
| ID @ VWM | 0.2 μA max - Reverse leakage current at rated stand-off voltage; ensures minimal standby power loss |
| TJ max. | +175 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV (air), 8 kV (contact) - Validated electrostatic discharge immunity for end-equipment compliance |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low profile (0.95 mm typical height), halogen-free, RoHS-compliant, M3 industrial grade. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference node for reverse transient suppression | Connected to system ground or low-impedance return path; defines polarity-sensitive placement on PCB |
| Cathode | Current exit terminal in forward bias; high-side connection for transient clamping | Connected to protected line (e.g., 33 V rail or signal); clamps to anode when overvoltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 0.95 mm typical height enables use in ultra-thin consumer and automotive modules |
| Automated placement compatibility | Slender SlimSMA footprint and matte tin plating ensure reliable pick-and-place yield |
| High-energy surge handling | 4 kW peak pulse power (8/20 μs) supports lightning-induced surge immunity in telecom and industrial ports |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak without preconditioning-eliminates moisture sensitivity concerns |
| Robust ESD protection | Validated 15 kV air / 8 kV contact discharge withstand meets IEC 61000-4-2 level 4 for front-end interfaces |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA or 0–10 V) of pressure/temperature sensors from load dump and inductive switching transients in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input to clamp fast-rising surges before they damage precision front-end circuitry. Use Value: Limits transient voltage to ≤53.1 V while maintaining <0.2 μA leakage-preserving signal integrity and measurement accuracy in 16-bit systems. |
Use Scenario: Safeguarding LIN bus transceiver power rails and data lines against battery reversal, jump-start spikes, and alternator load dump in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail and LIN signal line, absorbing 600 W pulses without degradation across –40 °C to +125 °C ambient. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-2, reducing need for redundant filtering in cost-sensitive BCU designs. |
| Telecom Line Driver | Consumer Power Adapter Output |
|
Use Scenario: Clamping induced surges on Ethernet PHY power pins and MDI-X signal pairs exposed to field wiring in PoE-powered access points. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor mounted adjacent to RJ45 connector, triggered within nanoseconds to limit voltage overshoot on 3.3 V/5 V rails. Use Value: Withstands 4 kW (8/20 μs) surges while adding only 0.95 mm height-critical for slim AP enclosures meeting UL 60950-1 clearance requirements. |
Use Scenario: Secondary-side overvoltage protection on 5 V/9 V/12 V USB-C PD adapter outputs against capacitor discharge and no-load regulation faults. IC Role / Device Role / Timing Role: Final-stage TVS between DC-DC post-regulator and output connector, clamping fault events before reaching connected devices. Use Value: 33 V VWM matches common adapter output tolerances; 53.1 V VC ensures downstream USB-PD controllers remain within absolute maximum ratings during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F33A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel, 13″ diameter vs. 3,500 pcs/reel, 7″ diameter) | No functional difference; suited for high-volume SMT production lines using larger reels | Select SMA6F33A-M3/6B when optimizing for feeder change frequency and minimizing line stoppages in mass manufacturing. |
| SMAJ33A-M3/61 | Higher clamping voltage (53.3 V vs. 53.1 V), same VWM/VBR, but lower PPPM (400 W vs. 600 W) and larger SMA (DO-214AC) package (2.3 mm height) | Limited suitability for ultra-low-profile designs; lower surge margin may require derating in harsh environments | Choose SMAJ33A-M3/61 only if legacy board layout or existing inventory mandates DO-214AC footprint compatibility. |
Compared with SMA6F33A-M3/H, SMA6F33A-M3/6B offers identical protection performance with optimized logistics for high-volume assembly, while SMAJ33A-M3/61 trades surge capacity and profile height for backward footprint compatibility-making SMA6F33A-M3/H the preferred choice for new designs prioritizing space and robustness.
Availability
SMA6F33A-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom line drivers requiring stable component supply, consistent M3-grade reliability, and full traceability through Vishay's authorized channel.
Supply support for SMA6F33A-M3/H 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMA6F series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in compact surface-mount formats targeting automotive, industrial, and communications infrastructure applications.
FAQ
What is the maximum clamping voltage of the SMA6F33A-M3/H under a 10/1000 μs surge?
The SMA6F33A-M3/H has a maximum clamping voltage (VC) of 53.1 V when subjected to a 10/1000 μs surge waveform at 11.3 A peak pulse current. This value is measured per JEDEC-standard test conditions and represents the upper bound of voltage seen by downstream circuitry during such transients. The SMA6F33A-M3/H maintains this clamping performance across its specified operating temperature range.
Does the SMA6F33A-M3/H support automated optical inspection (AOI) after reflow?
Yes, the SMA6F33A-M3/H supports AOI due to its consistent SlimSMA (DO-221AC) package geometry, matte tin-plated terminations, and clearly marked cathode band. Its 0.95 mm profile and symmetrical top/bottom views enable reliable fiducial detection and solder-joint assessment in high-speed SMT lines. The SMA6F33A-M3/H is qualified for MSL level 1, eliminating pre-bake requirements that could interfere with AOI timing.
Can the SMA6F33A-M3/H be used in bidirectional protection configurations?
No, the SMA6F33A-M3/H is explicitly unidirectional and not rated for bidirectional operation. Its electrical characteristics-including VBR, VC, and ID-are specified only for reverse-biased transient suppression. For AC or dual-polarity signal lines, two SMA6F33A-M3/H devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMBJ33CA should be selected instead. Using SMA6F33A-M3/H in bidirectional mode risks premature failure or undefined clamping behavior.
What is the thermal resistance junction-to-ambient (RθJA) for the SMA6F33A-M3/H on a standard FR4 PCB?
The SMA6F33A-M3/H exhibits a typical thermal resistance junction-to-ambient (RθJA) of 120 °C/W and a maximum of 150 °C/W when mounted on a standard FR4 PCB with 2 oz. copper and the recommended footprint per Vishay's datasheet. This value assumes no additional heatsinking and directly impacts power derating above 25 °C ambient-e.g., at 85 °C ambient, the device's continuous power dissipation must be reduced to ~4.3 W to maintain TJ ≤ 175 °C. The SMA6F33A-M3/H's RθJA is validated per JEDEC 51-2A.
How does the M3 suffix affect the reliability of the SMA6F33A-M3/H?
The M3 suffix on SMA6F33A-M3/H denotes halogen-free, RoHS-compliant construction, industrial-grade qualification, and compliance with JESD201 class 2 whisker testing. It confirms extended temperature operation (–55 °C to +175 °C), enhanced moisture resistance (MSL level 1), and long-term metallurgical stability of the matte tin terminations-critical for automotive and industrial deployments. The SMA6F33A-M3/H's M3 designation is verified per Vishay's material categorization standard (doc# 99912) and is integral to its industrial-grade reliability claim.
SMA6F33A-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.1V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F33A-M3/H FAQ
1.How can I place an order for SMA6F33A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F33A-M3/H 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 SMA6F33A-M3/H reliable?
The price and inventory of SMA6F33A-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F33A-M3/H is usually 5 days.
3.What payment methods are accepted for SMA6F33A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F33A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F33A-M3/H?
SMA6F33A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F33A-M3/H 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 SMA6F33A-M3/H?
For technical support, including SMA6F33A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F33A-M3/H requirements.
6.How does Aetrix verify that SMA6F33A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F33A-M3/H 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 SMA6F33A-M3/H meets industry standards.
7.What is the process for return or replacement of SMA6F33A-M3/H?
All SMA6F33A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F33A-M3/H, 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 SMA6F33A-M3/H part is unused and in its original packaging.
Return procedure for SMA6F33A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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