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Vishay General Semiconductor - Diodes Division SMPC24A-M3/87A
- Part No.:
- SMPC24A-M3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC24A-M3/87A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC24A-M3/87A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for clamping inductive-switching transients on 24 V DC power rails and signal lines. It features a 24.0 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.6 A peak pulse current (IPPM), 38.9 V maximum clamping voltage (VC), and 1500 W peak pulse power (PPPM) at 10/1000 μs.
For engineers reviewing the SMPC24A-M3/87A datasheet, SMPC24A-M3/87A pinout, SMPC24A-M3/87A application, or SMPC24A-M3/87A equivalent, key selection criteria include clamping performance under 10/1000 μs surges, thermal resistance (RθJA ≤ 100 °C/W), unidirectional polarity with cathode band marking, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only when reverse voltage exceeds VBR to divert surge energy away from protected ICs or MOSFETs. Its low incremental surge resistance and fast response time enable effective suppression of ESD and load-dump transients in automotive and industrial power systems.
The SMPC24A-M3/87A uses a planar junction structure in a halogen-free, RoHS-compliant SMPC (TO-277A) package with matte tin-plated leads. It meets JESD 201 Class 2 whisker resistance and MSL Level 1 per J-STD-020, supporting reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across temperature and lot variation. |
| VC @ IPPM | 38.9 V - Clamped voltage at 38.6 A peak pulse; limits downstream voltage stress during worst-case 10/1000 μs surge events. |
| PPPM | 1500 W - Peak pulse power handling at 10/1000 μs waveform; supports high-energy transient suppression without failure. |
| IR @ VWM | 1.0 μA - Reverse leakage at rated stand-off voltage; negligible power loss and minimal impact on system quiescent current. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | ≤ 100 °C/W - Thermal resistance junction-to-ambient on FR4 PCB with 2 oz copper; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, 3-terminal configuration with cathode band marking. Dimensions: 4.80 × 3.70 × 1.10 mm (L × W × H), low-profile design optimized for automated placement and space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode terminals; shares current path with Anode 2 to reduce effective series resistance during surge conduction. |
| Anode 2 | Secondary anode connection | Second parallel anode terminal; enables higher surge current handling and lower clamping voltage versus single-anode devices. |
| Cathode | Common cathode terminal | Single cathode node marked by band; connects to protected circuit's reference (e.g., ground or return line) for unidirectional clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm height) | Enables use in ultra-thin modules and stacked PCB assemblies where Z-axis clearance is constrained. |
| Unidirectional clamping | Protects only against negative transients relative to cathode; avoids forward conduction during normal positive rail operation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving clamping fidelity. |
| AEC-Q101 qualified option (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for industrial and consumer electronics without compromising surge robustness. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input stage of DC-DC converter or LDO regulator. Use Value: Limits clamped voltage to 38.9 V during 1500 W surges, preventing overvoltage damage to downstream 40 V-rated power management ICs. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) of pressure or temperature sensors from ESD and cable-induced surges. IC Role / Device Role / Timing Role: TVS connected between signal line and ground, with low leakage (1.0 μA) preserving measurement accuracy. Use Value: Fast response and low clamping voltage ensure sensor ICs remain within absolute maximum ratings during 8 kV contact ESD events. |
| Telecom DC Power Input Protection | Computer Peripheral Port Protection |
|
Use Scenario: Guarding 24 V auxiliary power inputs of PoE-powered network switches and base station radios against lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input before bulk capacitance and upstream fuse. Use Value: 1500 W PPPM rating handles multi-kA induced surges while maintaining stable VWM for reliable standby operation. |
Use Scenario: Safeguarding USB-C or proprietary charging ports on industrial tablets and HMIs exposed to accidental 24 V misconnection. IC Role / Device Role / Timing Role: TVS placed at port entry point to clamp reverse-polarity or overvoltage faults before protection FETs or USB controllers. Use Value: Cathode-band polarity marking and compact SMPC footprint simplify layout verification and prevent orientation errors during SMT assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A (Vishay) | DO-214AC (SMA) package; 24 V VWM; 38.9 V VC; same 1500 W PPPM but higher RθJA (150 °C/W). | Larger footprint and taller profile (2.29 mm); less suitable for ultra-low-height designs. | Choose SMAJ24A-E3/5A only if legacy SMA footprint compatibility is required; SMPC24A-M3/87A offers superior thermal performance and board area efficiency. |
| 1.5SMC24A (ON Semiconductor) | SMD-2 (DO-214AB) package; 24 V VWM; 38.9 V VC; 1500 W PPPM; RθJA ≈ 120 °C/W; non-AEC-Q101 by default. | Wider body (7.11 mm vs. 3.70 mm), limiting routing density; no standard AEC-Q101 variant available. | Select 1.5SMC24A only for cost-sensitive industrial applications where AEC-Q101 is not mandated and board space permits larger package. |
Compared with SMAJ24A-E3/5A and 1.5SMC24A, SMPC24A-M3/87A delivers identical electrical clamping performance in a 40 % smaller footprint and 25–50 % lower thermal resistance, making it optimal for next-generation automotive and space-constrained industrial modules requiring AEC-Q101 readiness.
Availability
SMPC24A-M3/87A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and computer peripheral protection requiring stable component supply and long-term production continuity.
Supply support for SMPC24A-M3/87A 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 power MOSFETs with emphasis on reliability, ruggedness, and application-specific validation.
The SMPC series targets high-energy transient suppression in automotive, industrial, and telecom systems where low-profile packaging, AEC-Q101 qualification, and precise clamping performance are critical design requirements.
FAQ
What is the polarity configuration of SMPC24A-M3/87A?
The SMPC24A-M3/87A is a unidirectional TVS diode with cathode denoted by a band on the package. It conducts only when the cathode is more positive than either anode terminal, enabling clamping of negative-going transients on grounded-signal or positive-rail configurations. This polarity is confirmed in the Vishay datasheet Document Number 89116, Section "Mechanical Data" and "Electrical Characteristics" table.
Does SMPC24A-M3/87A meet AEC-Q101 qualification?
No - SMPC24A-M3/87A carries the industrial-grade M3 suffix and is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, the equivalent part is SMPC24ANHM3/I or SMPC24ANHM3/H, which use the HM3 suffix and are explicitly listed in the "Ordering Information" table of the same datasheet as AEC-Q101 qualified variants.
What is the mounting pad layout recommendation for SMPC24A-M3/87A?
The recommended mounting pad layout for SMPC24A-M3/87A is defined in the "Package Outline Dimensions" section of Vishay Document Number 89116: 4.80 mm × 3.70 mm overall outline with minimum pad lengths of 4.72 mm (anode side) and 4.75 mm (cathode side), and 1.27 mm minimum solder mask opening width. These dimensions ensure reliable solder joint formation and thermal transfer per JEDEC TO-277A standards.
How does the dual-anode structure of SMPC24A-M3/87A improve surge performance?
The dual-anode (Anode 1 + Anode 2) structure of SMPC24A-M3/87A reduces effective series resistance during surge conduction, lowering incremental voltage rise and improving clamping consistency. This architecture directly contributes to its 38.9 V clamping voltage at 38.6 A - verified in the "Electrical Characteristics" table - and enables higher peak pulse current handling than comparable single-anode TVS devices in the same package size.
What is the maximum allowable reflow temperature profile for SMPC24A-M3/87A?
SMPC24A-M3/87A meets MSL Level 1 per J-STD-020 and supports lead-free reflow with a maximum peak temperature of 260 °C. The device's matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and its molding compound is rated UL 94 V-0. These specifications are documented in the "Mechanical Data" section of Vishay Document Number 89116.
SMPC24A-M3/87A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- 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):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- TO-277A (SMPC)
SMPC24A-M3/87A FAQ
1.How can I place an order for SMPC24A-M3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC24A-M3/87A 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 SMPC24A-M3/87A reliable?
The price and inventory of SMPC24A-M3/87A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC24A-M3/87A is usually 5 days.
3.What payment methods are accepted for SMPC24A-M3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC24A-M3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC24A-M3/87A?
SMPC24A-M3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC24A-M3/87A 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 SMPC24A-M3/87A?
For technical support, including SMPC24A-M3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC24A-M3/87A requirements.
6.How does Aetrix verify that SMPC24A-M3/87A is sourced from the original manufacturer or authorized distributors?
All SMPC24A-M3/87A 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 SMPC24A-M3/87A meets industry standards.
7.What is the process for return or replacement of SMPC24A-M3/87A?
All SMPC24A-M3/87A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC24A-M3/87A, 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 SMPC24A-M3/87A part is unused and in its original packaging.
Return procedure for SMPC24A-M3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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