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Vishay General Semiconductor - Diodes Division SMPC8.5A-M3/87A
- Part No.:
- SMPC8.5A-M3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC8.5A-M3/87A.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:7,617
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Product details
Overview
SMPC8.5A-M3/87A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, rated for 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) with 14.4 V clamping voltage at 20 A IPPM. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the SMPC8.5A-M3/87A datasheet, SMPC8.5A-M3/87A pinout, SMPC8.5A-M3/87A application, or SMPC8.5A-M3/87A equivalent, key selection criteria include unidirectional polarity, 1.1 mm profile height, MSL Level 1 rating, 150 °C max junction temperature, and compatibility with automated SMT placement on FR4 PCBs.
Technical Context
This device operates as a silicon avalanche diode designed to clamp transient overvoltages before they damage downstream circuitry. Its low incremental surge resistance and fast response time enable effective suppression of 10/1000 μs waveform surges up to 1500 W without thermal runaway under defined derating conditions.
The SMPC8.5A-M3/87A uses a dual-anode, single-cathode configuration in the SMPC (TO-277A) package, where the cathode band denotes polarity. It requires mounting on a 2 oz. FR4 PCB per JEDEC 51-2A for specified thermal performance, with RθJA ≤ 100 °C/W and RθJM ≤ 3 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - guaranteed avalanche onset range for reliable triggering |
| VC @ IPPM | 14.4 V at 20 A - clamped voltage during full-rated 10/1000 μs surge, limiting stress on protected IC |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IR @ VWM | 1.0 μA - negligible leakage current at stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMPC (TO-277A) - ultra-low-profile 3-terminal SMD package with 1.1 mm typical height |
Pinout & Package
SMPC8.5A-M3/87A uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with dual anodes and a shared cathode. The cathode is marked by a band on the top surface. Mounting pad layout follows JEDEC TO-277A standard dimensions (e.g., 4.80 × 4.40 mm body, 6.80 mm pad length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary current entry terminal during reverse-biased clamping | Connected to protected line; forms one half of symmetrical dual-anode structure |
| Anode 2 | Secondary current entry terminal during reverse-biased clamping | Parallel path with Anode 1 to reduce incremental surge resistance and improve current sharing |
| Cathode | Common output terminal during clamping event | Banded end; connects to ground or low-impedance return path to shunt surge energy |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 1.1 mm typical height - enables use in space-constrained modules and thin consumer devices |
| Automated placement compatibility | Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 - ensures robust solderability in high-speed SMT lines |
| Low incremental surge resistance | Enables tighter clamping (VC = 14.4 V @ 20 A) versus comparable single-anode TVS devices |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - eliminates pre-baking requirements for standard assembly |
| Halogen-free & RoHS-compliant | M3 suffix indicates industrial-grade compliance with environmental regulations and JESD201 Class 2 whisker resistance |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and position sensor outputs from load-dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients below IC absolute maximum ratings. Use Value: 14.4 V clamping voltage ensures protected transceiver remains within its 16 V abs max rating during 20 A surge events. |
Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay coils and solenoid drivers in PLC modules. IC Role / Device Role / Timing Role: Standoff protection element absorbing 10/1000 μs inductive spikes generated during coil de-energization. Use Value: 1500 W PPPM rating handles repetitive switching surges without degradation when mounted on 2 oz. FR4. |
| Consumer Power Adapter Input | Telecom Line Interface |
|
Use Scenario: Secondary-side transient suppression on 5 V USB-C PD output rails exposed to hot-plug and cable ESD events. IC Role / Device Role / Timing Role: Fast-response clamping diode placed across VBUS and GND to limit voltage overshoot during plug insertion. Use Value: 1.0 μA IR at 8.5 V minimizes quiescent current drain while maintaining tight 9.44–10.4 V VBR tolerance. |
Use Scenario: Overvoltage protection on Ethernet PHY differential pairs and analog front-end lines in VoIP gateways. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor guarding sensitive receiver inputs against lightning-induced surges. Use Value: Dual-anode architecture reduces effective clamping impedance, improving immunity to multi-pulse transients per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A | DO-214AC (SMA) package; higher RθJA (~150 °C/W); single-anode construction | Larger footprint (4.5 × 2.7 mm vs. 4.8 × 4.4 mm); lower surge current sharing capability | Select SMAJ8.5A only if board space allows larger outline and thermal margin permits higher junction rise |
| SMCJ8.5A | DO-214AB (SMC) package; 1500 W rating but 2.4 mm height; single-anode, higher clamping (15.0 V @ 20 A) | Not suitable for ultra-low-profile designs; requires more vertical clearance and larger pad area | Choose SMCJ8.5A when mechanical robustness outweighs height constraints and 0.6 V higher VC is acceptable |
Compared with SMAJ8.5A and SMCJ8.5A, the SMPC8.5A-M3/87A delivers identical 8.5 V stand-off and 1500 W surge rating in a lower-profile, dual-anode package that improves current sharing and reduces clamping voltage by 0.6 V-critical for protecting modern low-voltage ICs.
Availability
SMPC8.5A-M3/87A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor control I/O, and telecom line protection requiring stable component supply and consistent M3-grade halogen-free compliance.
Supply support for SMPC8.5A-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, and protection devices with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMPC series was developed for high-density, low-profile transient suppression in automotive and industrial systems where board height and surge robustness are jointly constrained.
FAQ
What is the clamping voltage of SMPC8.5A-M3/87A at its rated peak pulse current?
The SMPC8.5A-M3/87A has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured with both anodes connected to the protected line and the cathode grounded, ensuring accurate system-level surge margin calculation for the SMPC8.5A-M3/87A in real-world layouts.
Is SMPC8.5A-M3/87A qualified for automotive applications?
No, SMPC8.5A-M3/87A carries the M3 suffix, indicating industrial-grade qualification only. Automotive-grade versions require the HM3 suffix (e.g., SMPC8.5AHM3), which is AEC-Q101 qualified and designated with ordering codes ending in HM3-not applicable to the SMPC8.5A-M3/87A part number.
What does the /87A package code signify for SMPC8.5A-M3/87A?
The /87A suffix specifies a 13-inch diameter plastic tape-and-reel packaging format containing 6500 units per reel. It does not affect electrical or thermal specifications-SMPC8.5A-M3/87A shares identical characteristics with SMPC8.5A-M3/86A (1500-unit 7-inch reel), differing only in logistics configuration.
How does the dual-anode structure of SMPC8.5A-M3/87A improve performance?
The dual-anode design lowers incremental surge resistance by distributing transient current across two parallel paths, resulting in tighter clamping (14.4 V vs. ~15.0 V for comparable single-anode devices) and improved thermal sharing. This architecture directly enhances the SMPC8.5A-M3/87A's ability to protect low-voltage ICs during repetitive surge events.
What is the maximum operating temperature for SMPC8.5A-M3/87A?
The SMPC8.5A-M3/87A has a maximum junction temperature (TJ max) of +150 °C, verified per the Vishay datasheet. This rating applies under specified thermal conditions-including mounting on a 2 oz. FR4 PCB with standard footprint-and supports reliable operation in under-hood automotive and high-temperature industrial environments for the SMPC8.5A-M3/87A.
SMPC8.5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- 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)
SMPC8.5A-M3/87A FAQ
1.How can I place an order for SMPC8.5A-M3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC8.5A-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 SMPC8.5A-M3/87A reliable?
The price and inventory of SMPC8.5A-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 SMPC8.5A-M3/87A is usually 5 days.
3.What payment methods are accepted for SMPC8.5A-M3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC8.5A-M3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC8.5A-M3/87A?
SMPC8.5A-M3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC8.5A-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 SMPC8.5A-M3/87A?
For technical support, including SMPC8.5A-M3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC8.5A-M3/87A requirements.
6.How does Aetrix verify that SMPC8.5A-M3/87A is sourced from the original manufacturer or authorized distributors?
All SMPC8.5A-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 SMPC8.5A-M3/87A meets industry standards.
7.What is the process for return or replacement of SMPC8.5A-M3/87A?
All SMPC8.5A-M3/87A units undergo pre-shipment inspection (PSI). If there is an issue with SMPC8.5A-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 SMPC8.5A-M3/87A part is unused and in its original packaging.
Return procedure for SMPC8.5A-M3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC8.5A-M3/87A Tags
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