My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMPC20A-M3/87A
- Part No.:
- SMPC20A-M3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC20A-M3/87A.pdf
- Description:
- TVS DIODE 20VWM 32.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:2,054
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMPC20A-M3/87A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® SMPC (TO-277A) package, designed for clamping transient overvoltages on power and signal lines. It features a 20.0 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), 46.3 A peak pulse current (IPPM), and clamps to ≤32.4 V at rated surge. It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics against inductive switching transients.
For engineers reviewing the SMPC20A-M3/87A datasheet, SMPC20A-M3/87A pinout, SMPC20A-M3/87A application, or SMPC20A-M3/87A equivalent, this page delivers verified electrical parameters, thermal derating behavior, JEDEC TO-277A mechanical dimensions, AEC-Q101 qualification status (not applicable to this variant), and real-world protection use cases - all confirmed from Vishay Document #89116.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient voltages above its VWM while maintaining low leakage (<1.0 µA at 20.0 V). Its unidirectional polarity requires cathode connection to the protected line and anode to ground, with the band marking indicating the cathode terminal.
The device uses a planar junction structure in a molded SMPC (TO-277A) package with matte tin-plated leads, achieving 85–100 °C/W junction-to-ambient thermal resistance on FR4 PCB with 2 oz copper. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V at 1.0 mA - guaranteed avalanche initiation range under DC test conditions |
| VC @ IPPM | ≤32.4 V at 46.3 A - clamped voltage during 10/1000 µs surge, defining worst-case stress on downstream circuitry |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 µs waveform, critical for IEC 61000-4-5 compliance margin |
| IR @ VWM | ≤1.0 µA - reverse leakage current at rated stand-off, ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood or high-temperature industrial enclosures |
| RθJA | 85–100 °C/W - thermal resistance to ambient on standard FR4 layout, guiding heatsinking and board copper requirements |
Pinout & Package
SMPC20A-M3/87A is housed in the SMPC (TO-277A) surface-mount package: 3-terminal, low-profile (1.1 mm typical height), halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. The cathode is marked by a band; polarity must be observed for correct unidirectional clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Common anode connection | Internally tied anodes - both pins must be connected to system ground for full surge current path and thermal dissipation |
| Cathode | Transient input / protected line | Connected to the line requiring protection (e.g., 24 V rail or sensor output); clamps to ground when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm typical height) | Enables use in space-constrained applications such as portable industrial sensors and compact motor controllers |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces |
| Very fast response time (<1 ps) | Clamps ESD and lightning-induced surges before they propagate into IC inputs, meeting IEC 61000-4-2 Level 4 immunity |
| Meets MSL Level 1, peak reflow 260 °C | Supports single-pass lead-free reflow without moisture-related popcorn failure, compatible with standard SMT assembly lines |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and consumer product certifications including EU RoHS and China RoHS |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Clamping |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules from load-dump transients up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp surges before LDO or DC/DC stage. Use Value: Withstands 1500 W peak pulse and clamps to ≤32.4 V, preventing regulator overvoltage shutdown and preserving MCU uptime. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors in factory automation PLC I/O modules from EFT bursts. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to suppress fast transients induced by nearby relay switching. Use Value: Sub-1 µA leakage at 20 V ensures no loading of mV-level sensor signals; 32.4 V clamping protects 24 V-rated op-amp front-ends. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE-powered network switches against surges on 48 V DC input derived from midspan injectors. IC Role / Device Role / Timing Role: Primary TVS on input bulk capacitor rail, coordinated with upstream fuse and secondary filtering. Use Value: 1500 W PPPM rating supports repeated surge events per IEC 61000-4-5; TO-277A package allows high-current routing without via bottlenecks. |
Use Scenario: Protecting high-side gate driver ICs in BLDC inverters from Miller-induced voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: TVS placed between gate driver output and source/emitter to clamp negative-going transients during turn-off. Use Value: Fast response and low clamping voltage (≤32.4 V) prevent false turn-on of power devices and reduce dv/dt stress on gate oxide. |
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 (Vishay) | Same VWM (20 V) and PPPM (400 W), but SMA package (higher RθJA ≈ 140 °C/W), lower IPPM (22.5 A) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 line surges requiring >1 kW | Select SMAJ20A-E3/5A only if board space is constrained and surge energy remains below 400 W duty cycle. |
| SMCJ20A (Littelfuse) | Identical VWM (20 V), higher PPPM (1500 W), same TO-277A footprint, but slightly higher VC (34.0 V) | Acceptable where 1.6 V higher clamping voltage does not violate downstream device absolute maximum ratings | SMCJ20A offers direct form-fit replacement with identical mounting and thermal interface, but verify VC margin in final design. |
Compared with SMAJ20A-E3/5A, SMPC20A-M3/87A delivers 3.75× higher surge power handling and better thermal performance due to dual-anode TO-277A construction; versus SMCJ20A, it provides tighter clamping (32.4 V vs. 34.0 V) and is optimized for automated placement with M3 halogen-free finish.
Availability
SMPC20A-M3/87A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, telecom power supplies, and sensor interface modules requiring stable component supply and long-term obsolescence management.
Supply support for SMPC20A-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, MOSFETs, and optoelectronics with emphasis on reliability, ruggedness, and application-specific optimization.
The SMPC series targets high-energy transient suppression in space- and thermally-constrained environments, delivering robust 1500 W surge capability in ultra-low-profile surface-mount packages for automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of SMPC20A-M3/87A under rated surge conditions?
The SMPC20A-M3/87A clamps to a maximum of 32.4 V when subjected to its rated 46.3 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events. Designers must ensure downstream components tolerate this clamped voltage under worst-case surge conditions.
Is SMPC20A-M3/87A AEC-Q101 qualified?
No, SMPC20A-M3/87A is not AEC-Q101 qualified. The AEC-Q101 qualification applies only to SMPCxxAN variants (e.g., SMPC22AN-M3/H) and higher-voltage AN-series parts. SMPC20A-M3/87A carries the industrial-grade M3 suffix - halogen-free, RoHS-compliant, and MSL Level 1 - but lacks automotive qualification documentation per Vishay Document #89116.
How should the dual-anode configuration of SMPC20A-M3/87A be implemented on the PCB?
Both Anode 1 and Anode 2 terminals of SMPC20A-M3/87A must be connected to the same ground net. This dual-anode structure reduces effective surge resistance and improves thermal spreading across the package. The recommended mounting pad layout (per JEDEC TO-277A) uses a common thermal pad connecting both anodes, with minimum 0.250" × 0.186" copper area on 2 oz FR4.
What is the reverse leakage current specification for SMPC20A-M3/87A at its rated stand-off voltage?
At 20.0 V reverse bias (VWM) and TA = 25 °C, SMPC20A-M3/87A exhibits a maximum reverse leakage current (IR) of 1.0 µA. This low leakage preserves signal integrity on high-impedance sensor lines and minimizes quiescent power loss in always-on systems - critical for battery-operated industrial monitors using SMPC20A-M3/87A.
Does SMPC20A-M3/87A require derating at elevated ambient temperatures?
Yes, SMPC20A-M3/87A must be derated above TA = 25 °C. Its 1.25 W steady-state power dissipation (PD) decreases linearly per Figure 2 in Vishay Document #89116, reaching zero at +150 °C junction temperature. For example, at TA = 85 °C, allowable PD drops to ~0.8 W - requiring careful thermal design when used near heat sources like power inductors or MOSFETs.
SMPC20A-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):
- 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-M3/87A FAQ
1.How can I place an order for SMPC20A-M3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC20A-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 SMPC20A-M3/87A reliable?
The price and inventory of SMPC20A-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 SMPC20A-M3/87A is usually 5 days.
3.What payment methods are accepted for SMPC20A-M3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC20A-M3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC20A-M3/87A?
SMPC20A-M3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC20A-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 SMPC20A-M3/87A?
For technical support, including SMPC20A-M3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC20A-M3/87A requirements.
6.How does Aetrix verify that SMPC20A-M3/87A is sourced from the original manufacturer or authorized distributors?
All SMPC20A-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 SMPC20A-M3/87A meets industry standards.
7.What is the process for return or replacement of SMPC20A-M3/87A?
All SMPC20A-M3/87A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC20A-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 SMPC20A-M3/87A part is unused and in its original packaging.
Return procedure for SMPC20A-M3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC20A-M3/87A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
