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Vishay General Semiconductor - Diodes Division SMP3V3-M3/85A
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- Part No.:
- SMP3V3-M3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP3V3-M3/85A.pdf
- Description:
- TVS DIODE 3.3VWM 7.3VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,268
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Product details
Overview
SMP3V3-M3/85A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for clamping voltage transients on low-voltage signal and power lines. It features a 3.3 V stand-off voltage (VWM), 4.10–5.10 V breakdown voltage (VBR) at 1.0 mA, 400 W peak pulse power (10/1000 μs), 54.8 A maximum peak pulse current (IPPM), and 7.3 V clamping voltage (VC) at IPPM - ideal for protecting 3.3 V logic interfaces and USB power rails.
For engineers reviewing the SMP3V3-M3/85A datasheet, SMP3V3-M3/85A pinout, SMP3V3-M3/85A application, or SMP3V3-M3/85A equivalent, key selection criteria include its DO-220AA (SMP) package footprint, unidirectional polarity with cathode band marking, low 1.0 mm profile for space-constrained PCBs, and compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements.
Technical Context
This TVS diode operates as a clamping device in reverse-biased configuration, activating when transient voltage exceeds its breakdown threshold to divert surge current away from protected circuitry. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and inductive switching spikes without latch-up or degradation under single-pulse conditions.
The device is rated for non-repetitive 10/1000 μs waveform surges up to 400 W, with thermal performance defined by RθJL = 50 °C/W and RθJA = 250 °C/W. It supports operation from –55 °C to +150 °C junction temperature and maintains ≤200 μA reverse leakage at VWM, enabling reliable protection in industrial and automotive-grade environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - maximum steady-state reverse voltage before clamping begins; matches standard 3.3 V I/O rail operating margin |
| VBR (min/max) | 4.10 V / 5.10 V at 1.0 mA - defines precise turn-on window for predictable transient response |
| VC @ IPPM | 7.3 V - clamped voltage during 54.8 A surge; ensures downstream 3.3 V ICs remain below absolute maximum ratings |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; sufficient for IEC 61000-4-5 Level 3 surges |
| IFSM | 40 A - 10 ms half-sine surge current rating; supports high-energy inductive load switching events |
| TJ max. | +150 °C - enables use in under-hood automotive or enclosed industrial enclosures without derating |
Pinout & Package
Package: SMP (DO-220AA) - ultra-low-profile surface-mount case with 1.0 mm typical height, matte tin-plated leads, UL 94 V-0 molding compound, and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to ground or lower-potential node in unidirectional TVS configuration | Provides low-impedance path for surge current to return to reference plane; requires direct copper pour connection per datasheet pad layout |
| Cathode | Current exit terminal during reverse-biased clamping; marked with color band; connects to protected line | Defines polarity-sensitive placement - incorrect orientation disables protection; must be routed to signal/power line requiring transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.0 mm typical height) | Enables integration into ultra-thin consumer electronics and portable devices where Z-height is constrained |
| 400 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment |
| MSL Level 1, LF peak 260 °C | Supports standard lead-free reflow profiles without preconditioning or special handling |
| Halogen-free, RoHS-compliant, industrial grade (M3 suffix) | Ensures long-term reliability in harsh environments and compliance with global environmental regulations |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity |
Applications
| USB Power Line Protection | Microcontroller I/O Pin Protection |
|---|---|
|
Use Scenario: Suppresses ESD and cable-induced surges on VBUS and D+/D− lines of USB 2.0 peripherals. IC Role / Device Role: Unidirectional clamping TVS placed between connector and PHY/controller. Use Value: Limits VBUS transients to ≤7.3 V, preventing damage to 3.3 V USB transceivers and maintaining signal integrity. |
Use Scenario: Shields GPIO, reset, and UART pins of ARM Cortex-M microcontrollers from board-level ESD and noise coupling. IC Role / Device Role: Point-of-use transient suppressor mounted directly at connector or header interface. Use Value: Clamps fast transients within nanoseconds while maintaining <200 μA leakage at 3.3 V, avoiding false resets or logic errors. |
| Automotive Body Control Module Inputs | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protects LIN bus and switch inputs in BCMs exposed to load dump and inductive kickback in 12 V systems. IC Role / Device Role: Primary overvoltage clamp on low-voltage sensor and control signal paths. Use Value: Withstands 40 A surge current and operates up to +150 °C, meeting AEC-Q200 stress test requirements for under-dash modules. |
Use Scenario: Guards analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors against field wiring transients. IC Role / Device Role: Secondary protection stage after primary filtering, placed adjacent to connector. Use Value: Delivers consistent 7.3 V clamping across –55 °C to +150 °C, ensuring stable sensor accuracy in wide-temperature industrial deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP3V3-M3/84A | Same electrical specs and package; differs only in tape-and-reel packaging (3000 pcs on 7″ reel vs. 10,000 pcs on 13″ reel) | No functional difference; selected based on production volume and SMT line feeder compatibility | Choose SMP3V3-M3/84A for pilot runs or smaller batch assembly; SMP3V3-M3/85A preferred for high-volume automated manufacturing |
| SMF3.3A (ON Semiconductor) | Same DO-219AB (SOD-123FL) package footprint but higher VBR (3.7–4.3 V), lower PPPM (200 W), and higher VC (11.2 V at 17.9 A) | Less robust clamping performance on 3.3 V rails; suitable only where lower surge energy is expected | Select SMF3.3A only if cost sensitivity outweighs clamping margin; SMP3V3-M3/85A provides superior protection headroom for critical 3.3 V interfaces |
Compared with SMP3V3-M3/84A, the SMP3V3-M3/85A offers identical protection performance with optimized logistics for large-scale production; versus SMF3.3A, it delivers 2× peak pulse power and 3.9 V lower clamping voltage - directly enhancing system-level surge survivability in demanding applications.
Availability
SMP3V3-M3/85A is available at Aetrix Electronics and suitable for USB power line protection, microcontroller I/O hardening, and automotive body control module designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMP3V3-M3/85A 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The eSMP® Series - including SMP3V3-M3/85A - was developed to deliver high-power transient suppression in ultra-compact surface-mount packages for space- and thermal-constrained modern electronics.
FAQ
What is the clamping voltage of SMP3V3-M3/85A at its rated peak pulse current?
The SMP3V3-M3/85A has a maximum clamping voltage (VC) of 7.3 V at its rated peak pulse current (IPPM) of 54.8 A, measured using a 10/1000 μs waveform. This value ensures that protected 3.3 V circuits remain safely below their absolute maximum voltage ratings during surge events. The SMP3V3-M3/85A achieves this clamping performance while maintaining low thermal resistance (RθJL = 50 °C/W), supporting repeatable operation in thermally dense layouts.
Is SMP3V3-M3/85A compatible with lead-free reflow soldering processes?
Yes, the SMP3V3-M3/85A meets MSL Level 1 per J-STD-020 and supports a maximum lead-free reflow peak temperature of 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102, and the M3 suffix confirms passing JESD 201 Class 2 whisker testing. These qualifications make the SMP3V3-M3/85A suitable for standard high-volume SMT assembly without prebaking or special process controls.
How does the breakdown voltage tolerance of SMP3V3-M3/85A affect circuit design?
The SMP3V3-M3/85A specifies a breakdown voltage (VBR) range of 4.10 V to 5.10 V at 1.0 mA test current. This ±12% tolerance requires designers to verify that the upper limit (5.10 V) remains safely below the protected IC's absolute maximum input voltage, while the lower limit (4.10 V) exceeds the system's normal operating voltage (3.3 V) with margin. The SMP3V3-M3/85A's tight VBR distribution ensures predictable turn-on behavior across production lots.
Can SMP3V3-M3/85A be used in bidirectional signal lines?
No - the SMP3V3-M3/85A is a unidirectional TVS diode, intended for DC-biased or ground-referenced lines such as power rails or single-ended digital signals. For bidirectional applications like RS-485 or AC-coupled data lines, a bidirectional variant (e.g., SMP3V3A-M3/85A) or dual-diode configuration is required. Using the unidirectional SMP3V3-M3/85A on truly bidirectional paths risks forward conduction during negative excursions and loss of protection.
What is the thermal resistance from junction to ambient for SMP3V3-M3/85A?
The SMP3V3-M3/85A has a typical junction-to-ambient thermal resistance (RθJA) of 250 °C/W when mounted on 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes the recommended pad layout from the datasheet; reducing pad area or omitting thermal vias will increase RθJA and reduce safe surge repetition rate. The SMP3V3-M3/85A's RθJL of 50 °C/W indicates efficient heat transfer to the PCB, making it suitable for intermittent surge duty in compact designs.
SMP3V3-M3/85A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 4.1V
- Voltage - Clamping (Max) @ Ipp:
- 7.3V
- Current - Peak Pulse (10/1000µs):
- 54.8A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-220AA (SMP)
SMP3V3-M3/85A FAQ
1.How can I place an order for SMP3V3-M3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP3V3-M3/85A 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 SMP3V3-M3/85A reliable?
The price and inventory of SMP3V3-M3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP3V3-M3/85A is usually 5 days.
3.What payment methods are accepted for SMP3V3-M3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP3V3-M3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP3V3-M3/85A?
SMP3V3-M3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP3V3-M3/85A 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 SMP3V3-M3/85A?
For technical support, including SMP3V3-M3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP3V3-M3/85A requirements.
6.How does Aetrix verify that SMP3V3-M3/85A is sourced from the original manufacturer or authorized distributors?
All SMP3V3-M3/85A 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 SMP3V3-M3/85A meets industry standards.
7.What is the process for return or replacement of SMP3V3-M3/85A?
All SMP3V3-M3/85A units undergo pre-shipment inspection (PSI). If there is an issue with SMP3V3-M3/85A, 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 SMP3V3-M3/85A part is unused and in its original packaging.
Return procedure for SMP3V3-M3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP3V3-M3/85A Tags
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