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Vishay General Semiconductor - Diodes Division SMP24A-M3/84A
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- Part No.:
- SMP24A-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP24A-M3/84A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
SMP24A-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the eSMP® (DO-220AA) package, rated for 400 W peak pulse power (10/1000 μs), 24 V stand-off voltage (VWM), and 38.9 V maximum clamping voltage (VC) at 10.3 A IPPM. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMP24A-M3/84A datasheet, SMP24A-M3/84A pinout, SMP24A-M3/84A application, or SMP24A-M3/84A equivalent, key selection criteria include clamping performance at 10.3 A surge current, unidirectional polarity with cathode band marking, DO-220AA footprint compatibility, and MSL Level 1 reflow capability up to 260 °C.
Technical Context
This device operates as a silicon avalanche diode optimized for fast transient suppression, with a typical response time under 1 ns and low incremental surge resistance enabling effective voltage clamping during ESD and lightning-induced surges. Its breakdown voltage range (26.7–29.5 V at 1 mA) ensures reliable triggering above the 24 V stand-off threshold while maintaining margin against normal operating transients.
The SMP24A-M3/84A is thermally characterized with RθJL = 50 °C/W and RθJA = 250 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements in its molded SMP case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum reverse working voltage before clamping begins; defines safe continuous operating limit for protected circuitry. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on behavior across production lot. |
| VC @ IPPM | 38.9 V - Clamped voltage at 10.3 A peak pulse current (10/1000 μs); directly limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capability; determines survivability against standardized surge waveforms. |
| IFSM | 40 A - Non-repetitive forward surge rating (10 ms half-sine); supports robustness during power-up or fault events. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal design boundary for PCB copper pad sizing and ambient derating. |
Pinout & Package
Package: SMP (DO-220AA), 2-terminal surface-mount case with cathode band marking; dimensions 3.61 mm × 2.18 mm × 1.0 mm (L × W × H); UL 94 V-0 molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., signal or power rail); forms low-impedance path to ground when V > VBR. |
| Cathode | Current exit terminal during clamping | Marked by color band; tied to system ground or lower-potential reference; defines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power | 400 W (10/1000 μs) - Enables protection against IEC 61000-4-5 Level 3 surges without external series impedance. |
| Clamping ratio (VC/VWM) | 1.62 - Low ratio indicates efficient voltage limiting relative to stand-off level, reducing stress on downstream ICs. |
| Response time | < 1 ns - Fast enough to suppress ESD (IEC 61000-4-2) and fast-switching transients before damage occurs. |
| MSL rating | Level 1, peak reflow 260 °C - Supports standard lead-free SMT assembly without moisture-related popcorning. |
| Halogen-free & RoHS | M3 suffix - Complies with industrial-grade environmental requirements and whisker resistance (JESD 201 Class 2). |
Applications
| Industrial Motor Control | Telecom Power Supply Input |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers from inductive kickback during relay or solenoid switching in PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or control signal lines to clamp transients before they reach sensitive logic inputs. Use Value: Limits voltage excursion to ≤38.9 V at 10.3 A, preventing latch-up or oxide breakdown in 24 V-rated controllers. |
Use Scenario: Surge suppression on 24 V or 48 V input rails of VoIP gateways and base station power converters. IC Role / Device Role / Timing Role: Primary-level transient suppressor upstream of DC/DC regulators to absorb IEC 61000-4-5 combination wave energy. Use Value: Withstands 400 W pulses and maintains <1 μA leakage at 24 V, minimizing standby power loss while ensuring reliability. |
| Automotive Body Control Module | Industrial Sensor Interface |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to chassis ground, absorbing negative-going spikes on 12 V supply lines. Use Value: 24 V VWM aligns with automotive 12 V nominal systems after regulation; 150 °C TJ max supports under-hood placement. |
Use Scenario: Shielding analog front-end circuits (e.g., RTD or strain gauge amplifiers) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS on differential sensor lines to avoid signal integrity degradation. Use Value: Sub-1 ns response preserves signal fidelity; 38.9 V clamping prevents amplifier saturation during 8 kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP24A-M3/85A | Same electrical specs; differs only in packaging - 10,000-unit 13" tape-and-reel vs. 3,000-unit 7" reel (84A). | No functional difference; selected based on volume procurement and SMT line feed requirements. | Choose 85A for high-volume automated assembly where reel change frequency must be minimized. |
| SMAJ24A | DO-214AC package; higher RθJA (350 °C/W); VC = 38.9 V at 10.3 A but larger footprint (4.3 mm × 2.6 mm). | Less suitable for ultra-dense layouts; requires larger PCB pads and exhibits greater thermal rise under repeated surges. | Select SMAJ24A only if legacy board space allows larger case or if DO-214AC tooling is already deployed. |
Compared with SMP24A-M3/84A, the 85A variant offers identical protection performance with optimized logistics for high-volume production, while SMAJ24A trades compactness and thermal efficiency for broader industry familiarity and alternate mounting compatibility.
Availability
SMP24A-M3/84A is available at Aetrix Electronics and suitable for industrial motor control, telecom power supply input, automotive body control modules, and industrial sensor interface designs requiring stable component supply and consistent surge immunity performance.
Supply support for SMP24A-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, and transient protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMP series was engineered for high-density surface-mount transient suppression in space-constrained industrial and telecom systems, prioritizing low profile, high power density, and robust reflow compatibility.
FAQ
What is the clamping voltage of the SMP24A-M3/84A at its rated peak pulse current?
The SMP24A-M3/84A clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 10.3 A using the standard 10/1000 μs waveform. This value is measured under defined test conditions per JEDEC standards and ensures predictable overvoltage limiting for downstream components in the protected circuit.
Does the SMP24A-M3/84A support lead-free reflow soldering?
Yes, the SMP24A-M3/84A meets MSL Level 1 per J-STD-020 and is qualified for lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102, ensuring reliable wetting and intermetallic formation during standard SMT processes.
How does the SMP24A-M3/84A differ from the SMP24A-M3/85A?
The SMP24A-M3/84A and SMP24A-M3/85A share identical electrical, thermal, and mechanical specifications. The sole difference is packaging: the 84A suffix denotes 3,000 units per 7" diameter tape-and-reel, while 85A indicates 10,000 units per 13" reel. Both use the same DO-220AA case and M3 halogen-free construction.
What is the reverse leakage current of the SMP24A-M3/84A at its stand-off voltage?
At the 24 V stand-off voltage (VWM), the SMP24A-M3/84A exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This low leakage minimizes power loss in always-on circuits and avoids false triggering in high-impedance sensor interfaces.
Can the SMP24A-M3/84A be used in bidirectional transient protection applications?
No - the SMP24A-M3/84A is a unidirectional TVS diode, designed to clamp only positive transients relative to its cathode. For bidirectional protection, a dedicated bidirectional part such as SMBJ24CA or an external series pair would be required; using SMP24A-M3/84A in reverse-biased configuration risks permanent breakdown.
SMP24A-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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)
SMP24A-M3/84A FAQ
1.How can I place an order for SMP24A-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP24A-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 SMP24A-M3/84A reliable?
The price and inventory of SMP24A-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 SMP24A-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP24A-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP24A-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP24A-M3/84A?
SMP24A-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP24A-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 SMP24A-M3/84A?
For technical support, including SMP24A-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP24A-M3/84A requirements.
6.How does Aetrix verify that SMP24A-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP24A-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 SMP24A-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP24A-M3/84A?
All SMP24A-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP24A-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 SMP24A-M3/84A part is unused and in its original packaging.
Return procedure for SMP24A-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP24A-M3/84A Tags
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