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Vishay General Semiconductor - Diodes Division SMPC85AN-M3/H
- Part No.:
- SMPC85AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC85AN-M3/H.pdf
- Description:
- TVS DIODE 85VWM 137VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
SMPC85AN-M3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on DC power rails and signal lines. It features a standoff voltage of 85.0 V, clamping voltage of 137 V at 10.9 A peak pulse current, 1500 W peak pulse power rating (10/1000 μs), and operates within -55 °C to +150 °C junction temperature range. It is used in automotive sensor units and industrial power supplies requiring robust ESD and load-switching transient immunity.
For engineers reviewing the SMPC85AN-M3/H datasheet, SMPC85AN-M3/H pinout, SMPC85AN-M3/H application, or SMPC85AN-M3/H equivalent, this page delivers verified electrical parameters, package dimensions, thermal derating behavior, AEC-Q101 qualification status, and direct alternative part comparisons - all grounded in Vishay's official Document Number 89116 (Rev. 17-Sep-2021).
Technical Context
This device implements a silicon avalanche diode structure optimized for fast response (<1 ns) to transient overvoltages, with low incremental surge resistance enabling tight clamping under high-current surges. Its unidirectional polarity supports DC-biased rail protection where reverse conduction must be blocked until breakdown threshold is exceeded.
The SMPC85AN-M3/H uses the SMPC (TO-277A) surface-mount package with dual anode/cathode configuration - cathode marked by band - and is rated for MSL Level 1 reflow compatibility (260 °C peak). It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive applications when ordered with HM3 suffix; the /H suffix denotes 7" tape-and-reel packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.0 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; defines safe DC bias margin. |
| VBR min/max | 94.4 V / 104 V at 1.0 mA - Breakdown voltage tolerance window; ensures predictable turn-on across production lots. |
| VC @ IPPM | 137 V at 10.9 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against ISO 7637-2 Pulse 1/2a/5a-level transients. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on FR4 PCB; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, dual-terminal configuration with cathode band marking. Dimensions: 4.80 × 4.40 × 1.10 mm (L × W × H), compliant with JEDEC TO-277A standard. Matte tin-plated leads, J-STD-002 solderable, JESD 22-B102 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal under forward bias; connected to protected line or rail | Accepts surge current flow toward cathode during clamping; requires correct DC polarity alignment. |
| Cathode (banded end) | Reference/ground return path during transient conduction | Must connect to lower-potential node (e.g., ground or negative rail); polarity reversal blocks conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm height) | Enables placement in space-constrained modules such as automotive ECUs and portable industrial sensors without mechanical interference. |
| AEC-Q101 qualified variant available | SMPC85ANHM3/H meets automotive reliability standards for temperature cycling, humidity, and mechanical shock - validated for under-hood use. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive kickback), improving protection margin for downstream MOSFETs and microcontrollers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak, eliminating bake requirements in SMT assembly. |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply rail and chassis ground to clamp surges above 85 V while blocking normal reverse leakage. Use Value: Limits transient voltage to ≤137 V at 10.9 A, preventing damage to 100 V-rated LDOs and signal-conditioning amplifiers in AEC-Q100-compliant modules. | Use Scenario: Safeguarding 48 V DC input stages of programmable logic controllers (PLCs) and motor drives against switching transients from contactors and solenoids. IC Role / Device Role / Timing Role: Primary surge suppression element mounted directly at power entry point, shunting energy to ground during 10/1000 μs pulses. Use Value: Withstands 1500 W peak pulse power and maintains clamping below 137 V, preserving integrity of upstream rectifiers and downstream buck converters. |
| Telecom Line Interface Protection | Consumer Device USB/DC Input Protection |
Use Scenario: Shielding Ethernet PHY power pins and PoE injectors from lightning-induced surges and EFT events in outdoor telecom equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V PoE power pairs, coordinated with gas discharge tubes for multi-stage protection architecture. Use Value: 85 V VWM allows compatibility with IEEE 802.3af/at voltage envelopes; 137 V clamping ensures compliance with IEC 61000-4-5 Level 4 (4 kV) testing. | Use Scenario: Hardening 5–20 V USB-C PD input circuits in smart home hubs and IoT gateways against user-insertion surges and adapter faults. IC Role / Device Role / Timing Role: First-line transient suppressor on VBUS line, placed ahead of USB PD controller and load switch. Use Value: 1.1 mm height enables co-placement with USB connectors; 1500 W rating handles repeated 10/1000 μs surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85A-E3/5A (Vishay) | Same VWM (85 V) and VC (137 V), but SMA package (higher RθJA = 150 °C/W), lower PPPM (400 W), non-AEC-Q101. | Limited to commercial-grade consumer/industrial boards; unsuitable for automotive due to lower surge rating and qualification gap. | Select SMPC85AN-M3/H when 1500 W surge capacity, AEC-Q101 compliance, or low-profile mounting is required. |
| 1.5KE85A (ON Semiconductor) | Through-hole DO-201 package, same VWM/VC, but higher VBR tolerance (94–105 V), 1500 W rating, no AEC-Q101. | Requires PCB through-hole real estate and wave soldering; lacks MSL-1 reflow compatibility and automotive qualification. | Choose SMPC85AN-M3/H for SMT automation, space-constrained designs, or automotive OEM programs demanding traceable qualification. |
Compared with SMAJ85A-E3/5A and 1.5KE85A, the SMPC85AN-M3/H delivers identical clamping performance in a surface-mount, low-profile, AEC-Q101-qualified package - enabling higher board density, automated assembly, and guaranteed automotive reliability without sacrificing surge rating.
Availability
SMPC85AN-M3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, telecom PoE interfaces, and consumer USB-C PD protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMPC85AN-M3/H 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in power management, signal conditioning, and circuit protection technologies.
The SMPC85AN-M3/H belongs to Vishay's TRANSZORB® TVS diode product line, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where reliability under harsh electrical stress is critical.
FAQ
What is the clamping voltage of SMPC85AN-M3/H and how is it measured?
The SMPC85AN-M3/H has a maximum clamping voltage (VC) of 137 V, measured at 10.9 A peak pulse current using a 10/1000 μs waveform per Figure 1 in Vishay Document 89116. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events, ensuring downstream components remain within safe operating limits. The SMPC85AN-M3/H achieves this with low incremental surge resistance and optimized silicon junction design.
Is SMPC85AN-M3/H qualified for automotive applications?
Yes - the SMPC85AN-M3/H is part of the AEC-Q101-qualified SMPCxxAN series. While the /M3/H suffix denotes industrial-grade halogen-free RoHS compliance and 7" tape-and-reel packaging, the base SMPC85AN device (with HM3 suffix) is explicitly certified to AEC-Q101. Engineers may select SMPC85ANHM3/H for automotive use; the SMPC85AN-M3/H shares identical electrical and thermal specs but is designated for industrial programs unless paired with HM3.
What does the "/H" in SMPC85AN-M3/H indicate?
The "/H" in SMPC85AN-M3/H specifies the preferred package code for 7-inch diameter plastic tape-and-reel delivery, containing 1500 units per reel. It does not affect electrical or thermal performance. This packaging format supports high-speed pick-and-place assembly and is compatible with standard SMT feeders. Other options include /I (13" reel, 6500 units) and /86A or /87A for earlier SMPC variants.
How does SMPC85AN-M3/H compare to bidirectional TVS diodes?
The SMPC85AN-M3/H is unidirectional, meaning it conducts only during positive surges relative to its cathode - ideal for DC-powered lines with defined polarity like automotive 12 V rails or USB VBUS. Bidirectional variants (e.g., SMPC85CA) would conduct on both polarities, increasing leakage and reducing noise immunity in DC systems. For SMPC85AN-M3/H, reverse leakage stays ≤1.0 μA at 85 V, preserving system efficiency and signal integrity.
What is the thermal resistance and how does it impact layout design for SMPC85AN-M3/H?
The SMPC85AN-M3/H has a maximum junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on a standard FR4 PCB with 2 oz. copper and the recommended pad layout. This means each watt of sustained power dissipation raises junction temperature by up to 100 °C above ambient. For reliable operation near TJ max (150 °C), keep average power <1.25 W and ensure adequate copper area around the SMPC85AN-M3/H pads per Vishay's mounting footprint guidelines.
SMPC85AN-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 10.9A
- 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)
SMPC85AN-M3/H FAQ
1.How can I place an order for SMPC85AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC85AN-M3/H 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 SMPC85AN-M3/H reliable?
The price and inventory of SMPC85AN-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC85AN-M3/H is usually 5 days.
3.What payment methods are accepted for SMPC85AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC85AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC85AN-M3/H?
SMPC85AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC85AN-M3/H 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 SMPC85AN-M3/H?
For technical support, including SMPC85AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC85AN-M3/H requirements.
6.How does Aetrix verify that SMPC85AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC85AN-M3/H 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 SMPC85AN-M3/H meets industry standards.
7.What is the process for return or replacement of SMPC85AN-M3/H?
All SMPC85AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC85AN-M3/H, 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 SMPC85AN-M3/H part is unused and in its original packaging.
Return procedure for SMPC85AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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