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Vishay General Semiconductor - Diodes Division SMP28-M3/84A
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- Part No.:
- SMP28-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP28-M3/84A.pdf
- Description:
- TVS DIODE 28VWM 50VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,273
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Product details
Overview
SMP28-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in DO-220AA (SMP) package, with 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 8.8 A peak pulse current (IPPM), and 45.4 V clamping voltage (VC). It protects MOSFETs and signal lines in industrial sensor units against inductive switching transients.
For engineers reviewing the SMP28-M3/84A datasheet, SMP28-M3/84A pinout, SMP28-M3/84A application, or SMP28-M3/84A equivalent, key selection criteria include unidirectional polarity, 1.0 mm profile height, MSL Level 1 rating, 260 °C lead-free reflow compatibility, and 150 °C maximum junction temperature.
Technical Context
This device operates as a unidirectional avalanche diode for transient overvoltage protection, leveraging silicon p-n junction clamping behavior under surge conditions. Its 45.4 V clamping voltage at 8.8 A ensures robust suppression of 10/1000 μs surges while limiting downstream voltage stress.
Thermal performance is defined by 50 °C/W junction-to-lead and 250 °C/W junction-to-ambient thermal resistance, enabling reliable operation on standard 5.0 mm × 5.0 mm copper pads per terminal. The DO-220AA package supports automated placement and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum reverse operating voltage before clamping begins; defines safe DC/AC signal line operating margin |
| VBR min/max | 31.1 V / 34.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on threshold |
| VC @ IPPM | 45.4 V - Clamped voltage during 8.8 A 10/1000 μs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400 W - Peak pulse power handling capability; defines energy absorption capacity for standardized surge waveforms |
| IFSM | 40 A - Non-repetitive forward surge current rating; supports single-event inrush or fault current tolerance |
| TJ max | +150 °C - Maximum junction temperature; sets upper thermal limit for continuous operation and derating curves |
Pinout & Package
DO-220AA (SMP) package: ultra-low-profile surface-mount case with cathode band marking; 1.0 mm typical height; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards; M3 suffix indicates halogen-free, RoHS-compliant, commercial-grade construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected line; conducts during forward surge events |
| Cathode | Clamping reference node | Marked by color band; connected to higher-potential side or ground; defines clamping polarity and voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients common in industrial motor drives and relay switching |
| 1.0 mm typical height | Reduces board space and profile in space-constrained consumer and telecom modules |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
Use Scenario: Protection of gate drivers and feedback lines in BLDC motor inverters subjected to inductive kickback from PWM switching. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across MOSFET gates or between microcontroller I/O and external sensors. Use Value: Limits transient voltage to ≤45.4 V during 8.8 A surges, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Standoff-clamp protector on signal lines referenced to chassis ground with unidirectional polarity alignment. Use Value: Maintains 28 V operating margin while clamping 10/1000 μs surges to 45.4 V-within ISO 7637-2 Pulse 1/2a limits for Class III loads. |
| Telecom Power Supply Input | Consumer USB Port ESD/Transient Protection |
Use Scenario: Secondary-side transient suppression on +12 V or +24 V DC input rails feeding PoE-powered switches or base station RF modules. IC Role / Device Role / Timing Role: Parallel-connected unidirectional TVS absorbing line-to-ground surges induced by nearby lightning-induced coupling. Use Value: Withstands 400 W pulses without degradation, preserving long-term reliability under repeated 1 kV/500 A surge stress per IEC 61000-4-5. | Use Scenario: Front-end protection for USB 2.0 data lines and VBUS in portable docking stations exposed to human-body-model ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on D+/D− lines, grounded cathode configuration. Use Value: 1.0 mm height enables co-placement with micro-USB connectors; 45.4 V clamping prevents damage to 3.3 V PHY transceivers during ±8 kV contact ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP28A-M3/84A | Identical electrical specs and package; same marking code "CG" per datasheet Table 1; SMP28-M3/84A is documented variant of SMP28A-M3/84A with identical VWM/VBR/VC/IPPM ratings | No functional difference; both rated for 28 V stand-off and 400 W pulse power in DO-220AA | Select SMP28-M3/84A when ordering via 7″ tape-and-reel (84A code); verify reel packaging matches production line requirements |
| SMBJ28A | DO-214AA (SMB) package; 2.3 mm height vs. 1.0 mm; 400 W rating same, but higher thermal resistance (RθJA = 35°C/W vs. 250°C/W) and larger footprint | Less suitable for ultra-thin designs; requires larger PCB pad area and may not fit automated placement constraints of compact modules | Choose SMBJ28A only if legacy layout uses SMB footprint or higher surge repetition rate demands better thermal mass |
Compared with SMP28A-M3/84A, SMP28-M3/84A offers identical protection performance in the same DO-220AA package, while SMBJ28A trades profile and placement compatibility for marginally improved thermal dissipation in a larger, taller case-making SMP28-M3/84A optimal for space-constrained, high-density industrial and telecom PCBs.
Availability
SMP28-M3/84A is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and telecom power supply input applications requiring stable component supply, consistent M3-grade halogen-free compliance, and 7″ tape-and-reel delivery format.
Supply support for SMP28-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, power efficiency, and application-specific optimization.
The TransZORB® SMP series was engineered for high-density surface-mount transient protection in space-constrained systems, targeting industrial automation, automotive electronics, and communications infrastructure where low profile, automated assembly, and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMP28-M3/84A at its rated peak pulse current?
The SMP28-M3/84A has a maximum clamping voltage (VC) of 45.4 V at its peak pulse current (IPPM) of 8.8 A under a 10/1000 μs waveform. This value is measured per standard test conditions defined in ANSI/IEEE C62.35 and confirmed in the Vishay datasheet Document Number 88481, page 2. The SMP28-M3/84A maintains this clamping performance across its specified operating temperature range.
Is SMP28-M3/84A compatible with lead-free reflow soldering processes?
Yes, SMP28-M3/84A is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards. The SMP28-M3/84A's M3 suffix confirms halogen-free, RoHS-compliant construction suitable for modern SMT lines.
What does the "84A" in SMP28-M3/84A indicate?
The "84A" in SMP28-M3/84A is the preferred package code denoting 7-inch diameter plastic tape-and-reel packaging with a base quantity of 3000 units per reel. This delivery mode is optimized for high-speed pick-and-place equipment. The SMP28-M3/84A ordering code explicitly references this reel format in Vishay's official ordering information table on page 2 of document 88481.
How does SMP28-M3/84A differ from SMP28A-M3/84A?
SMP28-M3/84A and SMP28A-M3/84A share identical electrical specifications-including VWM = 28 V, VBR = 31.1–34.4 V, VC = 45.4 V, and PPPM = 400 W-and use the same DO-220AA package and M3/84A reel coding. Per Vishay's datasheet 88481, SMP28-M3/84A is a documented variant of SMP28A-M3/84A with no functional distinction; both carry marking code "CG" and meet identical reliability and environmental standards.
What is the maximum junction temperature rating for SMP28-M3/84A?
The SMP28-M3/84A has a maximum junction temperature (TJ max) of +150 °C, as specified in the "Maximum Ratings" table on page 1 of Vishay document 88481. This rating applies across its full operating range and governs thermal derating above TA = 25 °C per the pulse derating curve in Figure 2. The SMP28-M3/84A's RθJL = 50 °C/W supports effective heat transfer to PCB copper pads.
SMP28-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 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)
SMP28-M3/84A FAQ
1.How can I place an order for SMP28-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP28-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 SMP28-M3/84A reliable?
The price and inventory of SMP28-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 SMP28-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP28-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP28-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP28-M3/84A?
SMP28-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP28-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 SMP28-M3/84A?
For technical support, including SMP28-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP28-M3/84A requirements.
6.How does Aetrix verify that SMP28-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP28-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 SMP28-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP28-M3/84A?
All SMP28-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP28-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 SMP28-M3/84A part is unused and in its original packaging.
Return procedure for SMP28-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP28-M3/84A Tags
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