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Vishay General Semiconductor - Diodes Division SMPC70AN-M3/I
- Part No.:
- SMPC70AN-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC70AN-M3/I.pdf
- Description:
- TVS DIODE 70VWM 113VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:7,146
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Product details
Overview
SMPC70AN-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for robust overvoltage protection of sensitive electronics. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps to ≤113 V at 13.3 A IPPM - ideal for protecting MOSFETs and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMPC70AN-M3/I datasheet, SMPC70AN-M3/I pinout, SMPC70AN-M3/I application, or SMPC70AN-M3/I equivalent, key selection criteria include unidirectional polarity, TO-277A (SMPC) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA ≤ 100 °C/W), and junction temperature rating up to +150 °C.
Technical Context
This device operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds VBR. Its low incremental surge resistance and fast response time enable effective suppression of transients from inductive load switching and ESD events.
The SMPC70AN-M3/I uses a dual-anode/single-cathode configuration in the SMPC (TO-277A) package, where the cathode band denotes polarity. It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirming suitability for automotive-grade power and signal line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | ≤113 V at 13.3 A (10/1000 μs) - clamped voltage during worst-case surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient power handling capability, critical for IEC 61000-4-5 compliance margin |
| RθJA | ≤100 °C/W - thermal resistance junction-to-ambient on FR4 PCB, determines derating above 25 °C ambient |
| TJ max | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - protects against negative transients only; requires correct orientation in series with protected line |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, low-profile (1.1 mm typical height), matte tin-plated leads, MSL Level 1 (260 °C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Input terminals for bidirectional current path during clamping | Dual-anode structure lowers dynamic impedance and improves surge sharing; both anodes connect to protected line |
| Cathode | Reference terminal (marked by band) | Connects to system ground or lower-potential rail; polarity must match layout to avoid forward conduction failure |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables use in space-constrained automotive ECUs and compact industrial sensors without compromising board clearance |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Low incremental surge resistance | Reduces clamping voltage overshoot during high-di/dt transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning or baking |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for automotive and industrial OEM supply chains |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails from load-dump and jump-start transients in vehicle body control modules. IC Role / Device Role / Timing Role: Clamping TVS placed between VIN and GND, absorbing energy from ISO 7637-2 Pulse 5a/b events. Use Value: Withstands 1500 W surges and clamps to ≤113 V, preventing damage to 3.3 V/5 V logic supplies downstream of DC/DC converters. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules from EFT and surge coupling. IC Role / Device Role / Timing Role: Unidirectional TVS installed in series with 4–20 mA or 0–10 V signal paths to limit transient-induced offset errors. Use Value: Fast response (<1 ns) and low leakage (<1 μA at 70 V) preserve signal integrity while meeting IEC 61000-4-4/5 immunity requirements. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Circuits |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports and remote PHY devices against induced lightning surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Primary-level TVS on input side of DC/DC converter, coordinated with secondary-side protection. Use Value: 70 V VWM aligns with 48 V nominal telecom systems; 1500 W PPPM supports ITU-T K.20/21 surge categories. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Clamp diode across motor terminals or H-bridge outputs to divert inductive kickback energy. Use Value: Dual-anode configuration ensures symmetrical clamping during bidirectional back-EMF events, extending MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/5A (Vishay) | Same VWM (70 V) and PPPM (400 W), but SMA package (higher RθJA ≈ 150 °C/W); not AEC-Q101 qualified | Limited to commercial/industrial use; unsuitable for automotive due to qualification gap and lower surge rating | Select when cost or legacy footprint drives preference over automotive reliability and 1500 W capability |
| 1.5KE70A (ON Semiconductor) | Through-hole DO-201 package; same VWM (70 V), lower PPPM (1500 W), but higher VC (115 V) and no AEC-Q101 | Requires PCB real estate for axial lead mounting; lacks automotive qualification and SMT process compatibility | Choose only if through-hole assembly is mandatory and thermal performance on FR4 is less critical than cost |
Compared with SMAJ70A-E3/5A and 1.5KE70A, the SMPC70AN-M3/I delivers superior automotive readiness (AEC-Q101), higher power density in a low-profile SMT package, and tighter clamping (≤113 V), making it optimal for next-generation automotive and space-constrained industrial designs.
Availability
SMPC70AN-M3/I is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, telecom DC feed surge suppression, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMPC70AN-M3/I 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, efficiency, and application-specific optimization.
The SMPC70AN-M3/I belongs to Vishay's TRANSZORB® TVS diode family, engineered specifically for high-energy transient suppression in harsh environments - especially automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and low-profile SMT integration are essential.
FAQ
What is the polarity configuration of the SMPC70AN-M3/I?
The SMPC70AN-M3/I is a unidirectional TVS diode with a dual-anode/single-cathode structure. The cathode is marked by a band on the package body and must be connected to the reference (ground or lower-potential) node. This configuration allows clamping only during negative transients relative to the cathode, ensuring proper protection alignment in DC-biased circuits. The SMPC70AN-M3/I datasheet confirms this polarity in the mechanical outline and electrical characteristics table.
Is the SMPC70AN-M3/I qualified for automotive applications?
Yes, the SMPC70AN-M3/I is AEC-Q101 qualified, as explicitly stated in the Vishay document 89116. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge robustness - validating its use in automotive powertrain, chassis, and body electronics. The "HM3" suffix denotes AEC-Q101 grade, and SMPC70AN-M3/I falls within the SMPC22AN–SMPC85AN qualified range per the ordering information table.
What does the "/I" suffix mean in SMPC70AN-M3/I?
The "/I" suffix in SMPC70AN-M3/I indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 6500 units per reel. This format is optimized for high-volume automated SMT placement. The "M3" prefix denotes halogen-free, RoHS-compliant, industrial-grade construction, while the "AN" in the base part number specifies the unidirectional variant with dual-anode topology. All these identifiers are defined in the Vishay ordering information section.
How does the SMPC70AN-M3/I compare to the SMPC70A variant?
The SMPC70AN-M3/I differs from SMPC70A primarily in polarity and internal configuration: SMPC70AN is unidirectional with dual anodes and single cathode, whereas SMPC70A is bidirectional (two-terminal symmetric). The AN version offers lower clamping voltage and better surge sharing for DC-biased lines, while SMPC70A suits AC or floating signal paths. Both share identical VWM (70 V) and PPPM (1500 W), but only SMPC70AN variants are AEC-Q101 qualified per the Vishay specification.
What is the thermal resistance and maximum power dissipation of the SMPC70AN-M3/I?
The SMPC70AN-M3/I 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 specified footprint. Its steady-state power dissipation (PD) is rated at 1.25 W at TA = 25 °C, derating linearly above that temperature per Figure 2 in the Vishay datasheet. These values directly impact layout decisions - such as copper area and airflow - to maintain TJ ≤ 150 °C under continuous operation.
SMPC70AN-M3/I 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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- 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)
SMPC70AN-M3/I FAQ
1.How can I place an order for SMPC70AN-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC70AN-M3/I 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 SMPC70AN-M3/I reliable?
The price and inventory of SMPC70AN-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC70AN-M3/I is usually 5 days.
3.What payment methods are accepted for SMPC70AN-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC70AN-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC70AN-M3/I?
SMPC70AN-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC70AN-M3/I 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 SMPC70AN-M3/I?
For technical support, including SMPC70AN-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC70AN-M3/I requirements.
6.How does Aetrix verify that SMPC70AN-M3/I is sourced from the original manufacturer or authorized distributors?
All SMPC70AN-M3/I 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 SMPC70AN-M3/I meets industry standards.
7.What is the process for return or replacement of SMPC70AN-M3/I?
All SMPC70AN-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC70AN-M3/I, 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 SMPC70AN-M3/I part is unused and in its original packaging.
Return procedure for SMPC70AN-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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