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Vishay General Semiconductor - Diodes Division SMP33-E3/84A
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- Part No.:
- SMP33-E3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP33-E3/84A.pdf
- Description:
- TVS DIODE 33VWM 59VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,775
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Product details
Overview
SMP33-E3/84A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for clamping voltage transients on power and signal lines. It features 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 clamps to ≤53.3 V at rated surge. It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMP33-E3/84A datasheet, SMP33-E3/84A pinout, SMP33-E3/84A application, or SMP33-E3/84A equivalent, key selection criteria include unidirectional polarity, DO-220AA package compatibility, 150 °C max junction temperature, low-profile 1.0 mm height, and MSL Level 1 reflow capability up to 260 °C.
Technical Context
The SMP33-E3/84A operates as a silicon avalanche diode with fast response time and low incremental surge resistance, enabling effective suppression of inductive switching spikes and lightning-induced surges. Its unidirectional configuration provides reverse-biased clamping only, requiring correct cathode-anode orientation relative to protected circuit polarity.
It is characterized under standardized 10/1000 μs waveform testing per ANSI/IEEE C62.35, with thermal performance defined by RθJL = 50 °C/W and RθJA = 250 °C/W. Mounting on 5.0 mm × 5.0 mm copper pads per terminal is required to achieve rated PPPM and IPPM values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V - breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | ≤53.3 V - clamped voltage during 7.5 A surge, limiting stress on downstream components |
| PPPM | 400 W - peak transient power it can absorb without failure using 10/1000 μs waveform |
| IFSM | 40 A - non-repetitive forward surge rating for 10 ms half-sine, supporting inrush tolerance |
| TJ max | +150 °C - maximum junction temperature, enabling use in high-ambient industrial environments |
| Package | SMP (DO-220AA) - ultra-low-profile 2-pin SMD package with 1.0 mm typical height and MSL Level 1 rating |
Pinout & Package
Package: SMP (DO-220AA), surface-mount, unidirectional, cathode indicated by color band. Dimensions: 3.61 mm × 2.18 mm × 1.0 mm (L × W × H), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to lower-potential side of protected line; completes clamping path during overvoltage |
| Cathode | Clamping node / reference connection | Marked with band; connects to higher-potential side (e.g., VCC or signal line); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.0 mm height) | Enables integration into space-constrained PCB layouts, including portable and dense industrial modules |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against IEC 61000-4-5 Level 3/4 surges without derating in standard layout |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow assembly without preconditioning or special handling |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and telecom end-equipment certifications |
Applications
| Industrial Motor Drive Protection | Telecom Power Input Stage |
|---|---|
Use Scenario: Suppresses voltage spikes caused by relay coil de-energization and contactor switching in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or gate driver supply rails to clamp transients before they reach sensitive control ICs. Use Value: Prevents latch-up or permanent damage to microcontrollers and isolated gate drivers during frequent load switching. | Use Scenario: Protects primary-side DC-DC converter inputs in base station power supplies exposed to lightning-induced surges on -48 V telecom lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input rail and chassis ground to divert surge energy away from upstream rectifiers and controllers. Use Value: Maintains system uptime by absorbing 400 W surges without degradation, meeting GR-1089-CORE immunity requirements. |
| Automotive Body Control Module (BCM) | Consumer Sensor Interface Protection |
Use Scenario: Shields LIN bus transceivers and power management ICs from load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS installed at connector interface to clamp reverse-polarity and inductive kick events. Use Value: Ensures functional safety compliance (ISO 16750-2) with verified clamping at ≤53.3 V under 7.5 A surge conditions. | Use Scenario: Guards analog outputs of MEMS accelerometers and temperature sensors in smart home hubs against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at sensor output pin to suppress sub-100 ns transients without distorting signal integrity. Use Value: Preserves measurement accuracy by limiting clamping voltage to 53.3 V while maintaining <100 pF junction capacitance at 1 MHz. |
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-M3/84A | Same electrical specs and package; differs only in marking code (CM vs. E3) and internal traceability - functionally identical | No difference; validated for identical use cases and qualification standards | Select SMP33A-M3/84A if preferred marking or legacy BOM alignment is required |
| SMAJ33A-E3/5AT | Higher RθJA (350 °C/W), larger SMA package (4.5 mm × 2.7 mm), 400 W rating maintained but requires larger pad area | Less suitable for ultra-dense layouts; not MSL Level 1 - requires moisture sensitivity handling | Choose SMAJ33A-E3/5AT only when DO-220AA footprint is unavailable or thermal design allows larger thermal pad |
Compared with SMP33-E3/84A, SMP33A-M3/84A offers identical protection performance in the same compact DO-220AA package, while SMAJ33A-E3/5AT trades size and process compatibility for broader distributor availability - making SMP33-E3/84A optimal for high-density, high-reliability industrial PCBs.
Availability
SMP33-E3/84A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer sensor interfaces requiring stable component supply and long-term production continuity.
Supply support for SMP33-E3/84A 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The eSMP® Series, including SMP33-E3/84A, was developed to deliver high-power transient suppression in minimal PCB area - targeting space-constrained, high-surge industrial and communications systems where traditional packages cannot fit.
FAQ
What is the exact breakdown voltage range for SMP33-E3/84A?
The SMP33-E3/84A has a guaranteed breakdown voltage (VBR) range of 36.7 V to 40.6 V at 1 mA test current, as specified in the Vishay document 88481. This range ensures consistent clamping behavior across production lots and defines the minimum voltage at which the device enters avalanche conduction. The SMP33-E3/84A must be selected with system operating margins that accommodate this full spread to avoid premature conduction during normal operation.
Is SMP33-E3/84A unidirectional or bidirectional?
SMP33-E3/84A is a unidirectional Transient Voltage Suppressor, meaning it clamps only in reverse bias - i.e., when cathode voltage exceeds anode voltage by ≥VBR. It does not provide symmetrical clamping like a bidirectional TVS. Polarity must be observed during placement: the cathode band must face the higher-potential side of the protected line. The SMP33-E3/84A datasheet explicitly lists "Polarity: Unidirectional" and shows cathode/anode labeling in the package outline.
What is the maximum clamping voltage of SMP33-E3/84A at its rated surge current?
The SMP33-E3/84A clamps to a maximum of 53.3 V when subjected to its rated peak pulse current (IPPM) of 7.5 A under the standard 10/1000 μs waveform. This value is measured at the device terminals and represents the upper limit of voltage seen by downstream components during worst-case surge events. The SMP33-E3/84A achieves this clamping performance while maintaining low incremental resistance, critical for protecting 3.3 V–36 V logic and power stages.
Does SMP33-E3/84A meet lead-free reflow requirements?
Yes, SMP33-E3/84A meets lead-free reflow requirements with MSL Level 1 rating per J-STD-020 and a maximum peak reflow temperature of 260 °C. Its matte tin-plated terminals are solderable per J-STD-002 and JESD 22-B102, and the molding compound complies with UL 94 V-0. No moisture preconditioning is needed prior to assembly. The SMP33-E3/84A is qualified for standard Pb-free reflow profiles used in industrial and telecom manufacturing.
What package type does SMP33-E3/84A use, and what are its key mechanical dimensions?
SMP33-E3/84A uses the SMP (DO-220AA) package: a 2-pin surface-mount outline measuring 3.61 mm × 2.18 mm × 1.0 mm (L × W × H), with cathode identified by a visible band. Pad layout requires 5.0 mm × 5.0 mm copper areas per terminal to achieve full 400 W rating. The SMP33-E3/84A's 1.0 mm profile enables stacking under shields and routing in tight pitch designs - a key advantage over larger SMA or SMB packages.
SMP33-E3/84A 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:
- 59V
- Current - Peak Pulse (10/1000µs):
- 6.8A
- 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)
SMP33-E3/84A FAQ
1.How can I place an order for SMP33-E3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP33-E3/84A 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 SMP33-E3/84A reliable?
The price and inventory of SMP33-E3/84A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP33-E3/84A is usually 5 days.
3.What payment methods are accepted for SMP33-E3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP33-E3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP33-E3/84A?
SMP33-E3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP33-E3/84A 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 SMP33-E3/84A?
For technical support, including SMP33-E3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP33-E3/84A requirements.
6.How does Aetrix verify that SMP33-E3/84A is sourced from the original manufacturer or authorized distributors?
All SMP33-E3/84A 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 SMP33-E3/84A meets industry standards.
7.What is the process for return or replacement of SMP33-E3/84A?
All SMP33-E3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP33-E3/84A, 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 SMP33-E3/84A part is unused and in its original packaging.
Return procedure for SMP33-E3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP33-E3/84A Tags
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