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Vishay General Semiconductor - Diodes Division SMPC20A-M3/86A
- Part No.:
- SMPC20A-M3/86A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC20A-M3/86A.pdf
- Description:
- TVS DIODE 20VWM 32.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
SMPC20A-M3/86A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMPC (TO-277A) package, with 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM). It clamps transients to ≤32.4 V at 46.3 A, operates from –55 °C to +150 °C, and is rated for automated placement in automotive and industrial power rail protection.
For engineers reviewing the SMPC20A-M3/86A datasheet, SMPC20A-M3/86A pinout, SMPC20A-M3/86A application, or SMPC20A-M3/86A equivalent, this page delivers verified electrical parameters, thermal derating behavior, JEDEC TO-277A mechanical dimensions, AEC-Q101 qualification status, and real-world clamping performance under 10/1000 μs surge conditions.
Technical Context
The SMPC20A-M3/86A uses an avalanche diode structure optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of inductive switching spikes and ESD events. Its unidirectional polarity requires cathode-band orientation toward the protected line's positive rail, with clamping action triggered only when reverse voltage exceeds VBR.
Thermal design relies on junction-to-ambient resistance (RθJA) of 85–100 °C/W on FR4 with 2 oz copper, and junction-to-mount (RθJM) of 2.5–3.0 °C/W - critical for sustained surge duty cycles. The device meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - guaranteed avalanche initiation range for reliable turn-on margin |
| VC @ IPPM | 32.4 V at 46.3 A - clamped voltage during 10/1000 μs surge, defining worst-case overvoltage seen by downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability under standardized 10/1000 μs waveform |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood or high-ambient industrial environments |
| Package | SMPC (TO-277A) - 3-terminal surface-mount outline with 1.1 mm typical height and 0.189" × 0.173" footprint |
Pinout & Package
SMPC20A-M3/86A uses the SMPC (TO-277A) package: a 3-terminal, unidirectional SMD outline with cathode band marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and meet UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary current path input | Connected to protected line (e.g., 24 V rail); forms one half of dual-anode configuration |
| Anode 2 | Secondary current path input | Parallel anode terminal enabling higher surge current sharing; both anodes tied together in standard use |
| Cathode | Clamping output / reference node | Connected to ground or low-impedance return; clamping occurs between cathode and either anode |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables placement beneath low-clearance shields or in ultra-thin PCB assemblies without mechanical interference |
| Unidirectional operation | Protects DC rails only - blocks reverse conduction while clamping positive transients to ground |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising surges (e.g., ISO 7637-2 Pulse 1/2a), improving system immunity |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake requirements before assembly |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance for global industrial and automotive shipments without material declaration exceptions |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 16750-2) and inductive kickback on 24 V battery-fed ECUs. IC Role / Device Role / Timing Role: Primary TVS clamp placed directly at connector entry point to limit bus voltage to ≤32.4 V during 10/1000 μs surges. Use Value: Prevents damage to CAN transceivers and microcontrollers by holding rail voltage below their absolute maximum ratings during 1500 W surge events. | Use Scenario: Guarding analog input channels against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional shunt protector across sensor supply lines (e.g., 24 V to 0 V), activated only during overvoltage faults. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <1 pF junction capacitance - no impact on 10 kHz sensor bandwidth. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment front-ends against lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converters, sized for 1500 W peak dissipation. Use Value: Absorbs multi-kW surges without degradation, validated for >1000 strikes per MIL-STD-883H Method 3015.7. | Use Scenario: Protecting MCU GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in white goods. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor terminals, with cathode tied to chassis ground. Use Value: Limits spike amplitude to 32.4 V, preventing latch-up in 3.3 V/5 V logic interfaces and ensuring functional safety compliance (IEC 60730). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/5A | DO-214AC package; 20 V VWM; 32.4 V VC @ 46.3 A; 400 W PPPM (vs. 1500 W) | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 10/1000 μs surges | Select SMAJ20A-E3/5A only for cost-sensitive consumer applications with <400 W surge exposure. |
| SMCJ20A | DO-214AB package; same VWM/VC specs; 1500 W PPPM; RθJA ≈ 15 °C/W (vs. 85–100 °C/W) | Requires larger PCB area and heatsinking; not optimized for ultra-low-profile automated assembly | Choose SMCJ20A where thermal management allows larger footprint and higher mounting density is not required. |
Compared with SMAJ20A-E3/5A and SMCJ20A, the SMPC20A-M3/86A uniquely combines 1500 W surge capability with 1.1 mm height and MSL Level 1 compatibility - making it the only option for space-constrained, high-reliability automotive and industrial designs requiring full load-dump immunity.
Availability
SMPC20A-M3/86A is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC I/O modules, telecom DC feed protection, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMPC20A-M3/86A 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, MOSFETs, and transient protection devices with emphasis on reliability, automotive qualification, and industrial robustness.
The SMPC series was engineered specifically for high-power, low-profile transient suppression in automotive and industrial environments - delivering 1500 W surge capability in the smallest possible SMD footprint while maintaining AEC-Q101 readiness for critical subsystems.
FAQ
What is the exact breakdown voltage range for SMPC20A-M3/86A?
The SMPC20A-M3/86A has a guaranteed breakdown voltage (VBR) range of 22.2 V to 24.5 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This ensures consistent turn-on behavior across production lots and enables reliable margining against the 20 V stand-off voltage (VWM) in circuit design.
Is SMPC20A-M3/86A qualified to AEC-Q101?
No - SMPC20A-M3/86A carries the "M3" industrial-grade suffix, not "HM3". AEC-Q101 qualification applies only to SMPCxxAN variants (e.g., SMPC22ANHM3), as confirmed in the Vishay document 89116 revision 17-Sep-2021, Note (2) on page 3. SMPC20A-M3/86A is rated for industrial use with MSL Level 1 and JESD201 Class 2 whisker resistance.
What does the /86A package code signify for SMPC20A-M3/86A?
The /86A suffix denotes a 7-inch plastic tape-and-reel packaging format containing 1500 units per reel, as specified in Vishay's ordering information table (page 3 of document 89116). It does not indicate a variant change - electrical and mechanical specifications remain identical to other SMPC20A-M3 configurations.
Can SMPC20A-M3/86A be used in bidirectional configurations?
No - SMPC20A-M3/86A is strictly unidirectional, with cathode marked by a band and internal structure designed for reverse-biased clamping only. Bidirectional protection requires two devices in series opposition or a dedicated bidirectional TVS like SMBJ20CA; using SMPC20A-M3/86A in AC or bipolar signal paths will result in forward conduction and failure.
What is the thermal resistance profile of SMPC20A-M3/86A on standard FR4?
Per Vishay document 89116, SMPC20A-M3/86A exhibits a typical junction-to-ambient thermal resistance (RθJA) of 85 °C/W and a maximum of 100 °C/W when mounted on FR4 PCB with 2 oz copper and standard footprint. Its junction-to-mount resistance (RθJM) is 2.5–3.0 °C/W, supporting efficient heat transfer to underlying copper planes or heatsinks.
SMPC20A-M3/86A 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- 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)
SMPC20A-M3/86A FAQ
1.How can I place an order for SMPC20A-M3/86A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC20A-M3/86A 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 SMPC20A-M3/86A reliable?
The price and inventory of SMPC20A-M3/86A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC20A-M3/86A is usually 5 days.
3.What payment methods are accepted for SMPC20A-M3/86A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC20A-M3/86A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC20A-M3/86A?
SMPC20A-M3/86A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC20A-M3/86A 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 SMPC20A-M3/86A?
For technical support, including SMPC20A-M3/86A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC20A-M3/86A requirements.
6.How does Aetrix verify that SMPC20A-M3/86A is sourced from the original manufacturer or authorized distributors?
All SMPC20A-M3/86A 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 SMPC20A-M3/86A meets industry standards.
7.What is the process for return or replacement of SMPC20A-M3/86A?
All SMPC20A-M3/86A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC20A-M3/86A, 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 SMPC20A-M3/86A part is unused and in its original packaging.
Return procedure for SMPC20A-M3/86A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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