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Vishay General Semiconductor - Diodes Division SMPC85ANHM3/H
- Part No.:
- SMPC85ANHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC85ANHM3/H.pdf
- Description:
- TVS DIODE 85VWM 137VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:9,741
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Product details
Overview
SMPC85ANHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on power and signal lines. It features a 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), 10.9 A peak pulse current, and 137 V maximum clamping voltage at IPPM - deployed in automotive sensor interfaces and industrial power supply rails.
For engineers reviewing the SMPC85ANHM3/H datasheet, SMPC85ANHM3/H pinout, SMPC85ANHM3/H application, or SMPC85ANHM3/H equivalent, key selection criteria include AEC-Q101 qualification, TO-277A (SMPC) package compatibility, unidirectional polarity with cathode band marking, and thermal performance under FR4 PCB mounting conditions.
Technical Context
This device operates as a silicon avalanche diode optimized for fast response (<1 ns) to transient overvoltages induced by inductive switching or ESD events. Its low incremental surge resistance and tight VBR tolerance (±5%) ensure consistent clamping behavior across temperature (−55 °C to +150 °C junction).
The SMPC85ANHM3/H uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package, enabling symmetrical heat dissipation when mounted with cathode on heatsink - validated per JEDEC 51-14 TDIM for RθJM ≤ 3 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR min/max | 94.4 V / 104 V at 1 mA - defines guaranteed avalanche onset range for design margining |
| VC at IPPM | 137 V - clamping voltage under 10.9 A 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak surge power handling capability per standard waveform, critical for IEC 61000-4-5 compliance |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJA | 100 °C/W - thermal resistance to ambient on FR4, informs PCB copper area requirements |
| Polarity | Unidirectional - protects against positive transients only; requires correct cathode orientation |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, 3-terminal, very low profile (1.1 mm typical height), halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary current path anode | Connected to protected line; dual-anode structure lowers effective series resistance |
| Anode 2 | Secondary current path anode | Parallel conduction path improves surge current sharing and thermal distribution |
| Cathode | Avalanche reference terminal | Banded end; must be tied to system ground or lower-potential rail for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor modules |
| Low-profile SMPC package | 1.1 mm height enables use in space-constrained modules like battery management systems |
| Fast response time | <1 ns turn-on ensures protection of sub-ns-sensitive logic and analog front-ends |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak, eliminating moisture sensitivity concerns in SMT assembly |
| Matte tin-plated leads | Solderable per J-STD-002 and JESD 22-B102, supporting lead-free reflow profiles |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤137 V during 10.9 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding 24 V DC input stages of PLC I/O modules against inductive kickback from relay coils and solenoids. IC Role / Device Role / Timing Role: Primary surge suppression device upstream of input filter and DC-DC converter. Use Value: Absorbs 1500 W peak energy without failure, maintaining system uptime during factory floor switching events. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Secondary-level protector after gas discharge tube (GDT), clamping residual transients. Use Value: Low clamping voltage (137 V) prevents overstress on 100BASE-TX magnetics rated for 150 V isolation. | Use Scenario: Securing 12 V output rails of wall-mounted AC/DC adapters used in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Final-stage overvoltage guard before USB-PD controller or microcontroller power pins. Use Value: AEC-Q101 qualification ensures long-term reliability under thermal cycling and humidity exposure in consumer enclosures. |
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-HF | DO-214AC (SMA) package, 100 W PPPM, 85 V VWM, unidirectional | Lower surge rating limits use to sub-100 W applications; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and high-energy surge needs |
| SMCJ85A-Q | DO-214AB (SMC) package, 1500 W PPPM, 85 V VWM, AEC-Q101 qualified | Larger footprint (4.5 × 3.9 mm vs. 3.7 × 2.2 mm) and 2.3 mm height limit board density | Choose when existing layout accommodates SMC and thermal mass requirement exceeds SMPC capability |
Compared with SMAJ85A-HF and SMCJ85A-Q, the SMPC85ANHM3/H delivers identical 85 V standoff and 1500 W surge rating in a 40 % smaller footprint and 52 % lower profile - making it optimal for next-generation automotive modules where space and height are constrained.
Availability
SMPC85ANHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power supply inputs, telecom line interfaces, and consumer power adapter outputs requiring stable component supply across production lifecycles.
Supply support for SMPC85ANHM3/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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMPC series was developed specifically for high-power, low-profile transient suppression in AEC-Q101-compliant automotive and industrial systems - prioritizing thermal efficiency, surge robustness, and SMT manufacturability.
FAQ
What is the peak pulse power rating of SMPC85ANHM3/H and under what test condition?
The SMPC85ANHM3/H has a peak pulse power rating (PPPM) of 1500 W, measured using the standardized 10/1000 μs double-exponential current waveform per IEC 61000-4-5. This rating applies at TA = 25 °C and is derated linearly above that temperature per Figure 2 in the datasheet. The value reflects real-world surge immunity for automotive load-dump and industrial switching transients.
Is SMPC85ANHM3/H suitable for bidirectional transient protection?
No, SMPC85ANHM3/H is strictly unidirectional - it conducts only when the cathode is more positive than either anode. For bidirectional protection, two SMPC85ANHM3/H devices must be connected in series opposition, or a dedicated bidirectional part such as SMPC85AT should be selected. The device marking and cathode band confirm its unidirectional polarity.
What does the "HM3/H" suffix indicate in SMPC85ANHM3/H?
The "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification; "/H" specifies the preferred packaging code - 7-inch plastic tape and reel with 1500 units per reel. This ordering format ensures traceability, automated placement compatibility, and compliance alignment with automotive supply chain requirements for the SMPC85ANHM3/H.
How is thermal performance characterized for SMPC85ANHM3/H on a standard PCB?
SMPC85ANHM3/H exhibits RθJA ≤ 100 °C/W when mounted on a 2 oz. FR4 PCB with the standard footprint per JEDEC 51-2A. Its RθJM ≤ 3 °C/W (junction-to-mount) supports efficient heat transfer to external heatsinks when the cathode pad is thermally connected - a key advantage over SMA/SMB packages in high-reliability power rail protection.
Does SMPC85ANHM3/H require special handling during reflow soldering?
No special handling is required: SMPC85ANHM3/H meets MSL Level 1 per J-STD-020 and withstands lead-free reflow peaks up to 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102, ensuring reliable wetting and joint integrity without pre-baking or dry-pack requirements - simplifying manufacturing for the SMPC85ANHM3/H.
SMPC85ANHM3/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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC85ANHM3/H FAQ
1.How can I place an order for SMPC85ANHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC85ANHM3/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 SMPC85ANHM3/H reliable?
The price and inventory of SMPC85ANHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC85ANHM3/H is usually 5 days.
3.What payment methods are accepted for SMPC85ANHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC85ANHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC85ANHM3/H?
SMPC85ANHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC85ANHM3/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 SMPC85ANHM3/H?
For technical support, including SMPC85ANHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC85ANHM3/H requirements.
6.How does Aetrix verify that SMPC85ANHM3/H is sourced from the original manufacturer or authorized distributors?
All SMPC85ANHM3/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 SMPC85ANHM3/H meets industry standards.
7.What is the process for return or replacement of SMPC85ANHM3/H?
All SMPC85ANHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC85ANHM3/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 SMPC85ANHM3/H part is unused and in its original packaging.
Return procedure for SMPC85ANHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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