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Vishay General Semiconductor - Diodes Division SMP33A-M3/84A
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- Part No.:
- SMP33A-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP33A-M3/84A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,672
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Product details
Overview
SMP33A-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMP (DO-220AA) package, featuring a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 7.5 A peak pulse current (IPPM), and clamping voltage of 53.3 V at IPPM - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMP33A-M3/84A datasheet, SMP33A-M3/84A pinout, SMP33A-M3/84A application, or SMP33A-M3/84A equivalent, key selection criteria include unidirectional polarity, DO-220AA footprint compatibility, 1.0 mm profile for low-height PCB designs, MSL Level 1 rating, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
This device operates as a unidirectional TVS diode with avalanche breakdown behavior, designed to clamp transient overvoltages before they damage downstream components. Its 50 °C/W junction-to-lead thermal resistance and 250 °C/W junction-to-ambient rating support reliable surge dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
The SMP33A-M3/84A exhibits fast response time (<1 ns), low incremental surge resistance, and stable clamping performance across -55 °C to +150 °C operating junction temperature. It meets JEDEC J-STD-020 MSL Level 1 and is rated for 40 A non-repetitive forward surge current (IFSM) at 10 ms half-sine waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum reverse working voltage before leakage exceeds 1.0 μA; defines safe continuous operating threshold |
| VBR min/max | 36.7 V / 40.6 V at 1.0 mA - guaranteed avalanche onset range under standardized DC test conditions |
| PPPM | 400 W (10/1000 μs) - peak transient energy absorption capability without failure |
| IPPM | 7.5 A - maximum single-pulse surge current it can safely divert at rated waveform |
| VC | 53.3 V at IPPM - clamped voltage seen by protected circuit during worst-case surge event |
| TJ max | +150 °C - maximum allowable junction temperature for sustained reliability under surge and steady-state conditions |
| RθJL | 50 °C/W - enables effective heat transfer to PCB leads, critical for repeated surge duty cycles |
Pinout & Package
Package: SMP (DO-220AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals, cathode indicated by color band. Dimensions: 3.61 mm × 2.18 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to protected line side; forms low-impedance path to ground during overvoltage |
| Cathode | Current exit point; marked with color band | Typically tied to system ground or low-impedance return path; defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.0 mm height) | Enables use in space-constrained portable and stacked PCB assemblies without mechanical interference |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against IEC 61000-4-5 Level 3/4 surges in industrial control interfaces |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without preconditioning or special handling |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected ICs compared to higher-ratio alternatives |
| Matte tin plating, J-STD-002 solderable | Ensures high-yield, void-free reflow joints on OSP- or ENIG-finished PCBs |
Applications
| Industrial Motor Drive Control | Telecom Power Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from flyback voltage spikes generated by relay or solenoid coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp transients before they reach sensitive logic inputs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic circuits while maintaining signal integrity during normal operation. |
Use Scenario: Surge suppression on -48 V DC power feed lines entering telecom base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end clamping device on DC input rail, coordinated with upstream MOVs and downstream filtering. Use Value: Limits transient voltage to ≤53.3 V, keeping downstream DC-DC converters within absolute maximum ratings during 10/1000 μs surges. |
| Automotive Body Control Module | Consumer Sensor Hub |
Use Scenario: Input protection for LIN bus transceivers and window lift motor feedback sensors subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS on bidirectional LIN data line, referenced to vehicle chassis ground. Use Value: Maintains <1.0 μA leakage at 33 V, ensuring no impact on LIN bus biasing while clamping >100 V transients. |
Use Scenario: ESD and transient protection for analog output lines (e.g., 0–10 V, 4–20 mA) from environmental sensors in smart home hubs. IC Role / Device Role / Timing Role: Signal-line TVS placed directly at connector interface, with anode to signal and cathode to system ground. Use Value: Clamps fast ESD events (<1 ns rise) to <53.3 V, preserving ADC reference accuracy and preventing false triggers in low-voltage analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP33A-M3/85A | Same electrical specs; differs only in packaging - 13" tape-and-reel (10,000 pcs) vs. 7" reel (3,000 pcs) | No functional difference; selected based on production volume and SMT line feeder compatibility | Choose SMP33A-M3/84A for pilot runs or lower-volume builds; SMP33A-M3/85A for high-volume automated assembly |
| SMBJ33A | Higher RθJA (350 °C/W), larger SMB (DO-214AA) package (4.57 mm × 3.94 mm), 600 W PPPM rating | Less suitable for ultra-thin or dense layouts; better for higher-energy surges where board space allows | Select SMBJ33A only when surge energy exceeds 400 W or thermal margin requires larger copper area |
Compared with SMP33A-M3/84A, the SMP33A-M3/85A offers identical protection performance in a higher-volume reel format, while SMBJ33A trades compactness for higher pulse power and less stringent thermal constraints - making SMP33A-M3/84A optimal for space-limited, high-reliability industrial PCBs requiring MSL Level 1 compliance.
Availability
SMP33A-M3/84A is available at Aetrix Electronics and suitable for industrial motor control, telecom power interface, and automotive body electronics requiring stable component supply, consistent MSL Level 1 handling, and verified halogen-free manufacturing.
Supply support for SMP33A-M3/84A 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMP series was developed to deliver high-power transient suppression in ultra-low-profile surface-mount packages for next-generation compact electronics - targeting design-in across industrial automation, communications infrastructure, and automotive subsystems.
FAQ
What is the polarity configuration of the SMP33A-M3/84A?
The SMP33A-M3/84A is a unidirectional transient voltage suppressor, with cathode identified by a visible color band on the SMP (DO-220AA) package body. This polarity must be observed during PCB layout to ensure correct clamping direction - anode connects to the line being protected, cathode to ground. Incorrect orientation renders the SMP33A-M3/84A ineffective against positive transients.
Does the SMP33A-M3/84A meet RoHS and halogen-free requirements?
Yes, the SMP33A-M3/84A is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance. Its matte tin-plated terminals comply with J-STD-002 for solderability, and the molding compound meets UL 94 V-0 flammability standards - all confirmed in Vishay document 88481 revision 25-Apr-2022.
What is the maximum operating temperature for the SMP33A-M3/84A?
The SMP33A-M3/84A has a specified operating junction temperature range of -55 °C to +150 °C. Its thermal resistance values - RθJL = 50 °C/W and RθJA = 250 °C/W - mean that at 7.5 A IPPM surge, junction temperature rise above ambient will be ~375 °C without proper copper pad design; therefore, adherence to the 5.0 mm × 5.0 mm pad layout is essential to maintain SMP33A-M3/84A within its TJ max limit.
Can the SMP33A-M3/84A be used in bidirectional signal protection?
No, the SMP33A-M3/84A is strictly unidirectional and unsuitable for bidirectional signal lines such as USB or RS-485 without external circuitry. For bidirectional protection, a dedicated bidirectional TVS like SMBJ33CA or SMAJ33CA is required. Using SMP33A-M3/84A on AC-coupled or differential lines risks reverse breakdown failure or inadequate clamping during negative transients.
What is the clamping voltage of the SMP33A-M3/84A under surge conditions?
The SMP33A-M3/84A clamps to a maximum of 53.3 V when subjected to its rated 7.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This VC value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during surge conduction - a critical parameter for verifying compatibility with downstream IC absolute maximum ratings.
SMP33A-M3/84A 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SMP33A-M3/84A FAQ
1.How can I place an order for SMP33A-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP33A-M3/84A 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 SMP33A-M3/84A reliable?
The price and inventory of SMP33A-M3/84A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP33A-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP33A-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP33A-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP33A-M3/84A?
SMP33A-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP33A-M3/84A 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 SMP33A-M3/84A?
For technical support, including SMP33A-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP33A-M3/84A requirements.
6.How does Aetrix verify that SMP33A-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP33A-M3/84A 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 SMP33A-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP33A-M3/84A?
All SMP33A-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP33A-M3/84A, 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 SMP33A-M3/84A part is unused and in its original packaging.
Return procedure for SMP33A-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP33A-M3/84A Tags
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