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Vishay General Semiconductor - Diodes Division SMPC70AN-M3/H
- Part No.:
- SMPC70AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC70AN-M3/H.pdf
- Description:
- TVS DIODE 70VWM 113VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:865
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Product details
Overview
SMPC70AN-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for clamping inductive switching transients on power rails and signal lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 113 V maximum clamping voltage (VC) at 13.3 A IPPM, and 1500 W peak pulse power (10/1000 µs). It is used in automotive sensor units and industrial power supply protection.
For engineers reviewing the SMPC70AN-M3/H datasheet, SMPC70AN-M3/H pinout, SMPC70AN-M3/H application, or SMPC70AN-M3/H equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and mounting compatibility with FR4 PCBs using standard 2 oz copper footprints.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified VBR range (77.8–86.0 V at 1 mA). Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while the TO-277A package enables efficient heat transfer to the PCB via cathode-side mounting.
The device complies with AEC-Q101 stress testing for automotive applications and meets J-STD-020 MSL Level 1 (260 °C reflow peak). Its 1.1 mm profile supports high-density automated placement, and the matte tin-plated leads ensure solderability per J-STD-002 and whisker resistance per JESD 201 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Breakdown threshold range; determines turn-on consistency across temperature and unit variation. |
| VC @ IPPM | 113 V at 13.3 A (10/1000 µs) - Clamped voltage under rated surge; sets worst-case overvoltage seen by downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a and similar transients. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on FR4; informs derating requirements above 25 °C ambient. |
| Polarity | Unidirectional - Requires correct orientation (cathode band toward protected line); blocks forward current like a rectifier. |
| Package | SMPC (TO-277A) - 3-terminal SMD outline with dual anodes/cathode configuration; optimized for PCB thermal conduction and automated assembly. |
Pinout & Package
SMPC70AN-M3/H uses the SMPC (TO-277A) package: a 3-terminal surface-mount outline with 1.1 mm typical height, conforming to JEDEC TO-277A mechanical standards. The cathode is marked by a band; terminals are matte tin-plated for solderability and whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Connected to ground or low-impedance return path; forms one half of parallel anode structure for current sharing. |
| Anode 2 | Secondary anode connection | Electrically tied to Anode 1 internally; provides redundant bonding and lower effective series inductance. |
| Cathode | Transient voltage clamp output | Connected to protected line (e.g., 70 V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile packaging | 1.1 mm typical height enables use in space-constrained automotive ECUs and industrial controllers. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes qualification - this part uses /H tape code but shares same die and qualification as HM3 variants. |
| High surge current capability | 13.3 A peak pulse current (10/1000 µs) supports protection against severe load-dump and inductive kick events. |
| Halogen-free & RoHS-compliant | M3 suffix confirms compliance with environmental regulations and material restrictions for global manufacturing. |
| MSL Level 1 rating | Rated for unlimited floor life and 260 °C peak reflow, eliminating bake requirements prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamp |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from battery line transients in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VDD and chassis ground to clamp ISO 7637-2 Pulse 5a surges up to 100 V. Use Value: Limits clamped voltage to 113 V, preserving margin below 120 V absolute max ratings of automotive-grade op-amps and ADCs. |
Use Scenario: Safeguarding 70 V intermediate bus in factory automation PLCs against relay coil de-energization spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted directly across input capacitor to suppress repetitive 100–200 V, 10–100 µs transients. Use Value: Withstands 1500 W peak pulses and 1.25 W steady-state dissipation, enabling reliable operation without heatsinking. |
| Telecom DC Power Interface | Consumer Device USB-C PD Line |
Use Scenario: Shielding 48 V PoE-powered Ethernet switches from lightning-induced surges on data lines and auxiliary power rails. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side 48 V distribution, coordinated with upstream GDTs and series impedance. Use Value: Fast response time and low clamping ratio (VC/VWM = 1.61) minimize stress on DC-DC controller ICs and MOSFETs. |
Use Scenario: Overvoltage protection on USB-C Power Delivery 20 V/36 V/48 V variable rails in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed after buck-boost converter output to guard against regulator fault conditions and hot-swap overshoot. Use Value: 70 V VWM aligns with 48 V PD profiles; 113 V VC ensures compatibility with 120 V-rated load switches and protection FETs. |
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-E3/5AT | DO-214AC (SMA) package; higher RθJA (~150 °C/W); 113 V VC at 13.3 A; same VWM/VBR range. | Limited thermal performance on dense PCBs; not AEC-Q101 qualified; lower surge repetition tolerance. | Acceptable for cost-sensitive consumer designs where board space and automotive qualification are not required. |
| SMCJ70A-M3/86A | SMC (DO-214AB) package; larger footprint; RθJA ~75 °C/W; identical electrical specs; also AEC-Q101 qualified. | Better thermal dissipation but occupies ~2.5× more area; requires revised layout and stencil. | Preferred when higher continuous power handling or legacy footprint compatibility is needed; not drop-in for SMPC layout. |
Compared with SMAJ70A-E3/5AT and SMCJ70A-M3/86A, SMPC70AN-M3/H delivers superior thermal performance per unit area and maintains AEC-Q101 compliance in the smallest possible footprint - critical for next-generation ADAS domain controllers and compact industrial drives.
Availability
SMPC70AN-M3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and telecom DC interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMPC70AN-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 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 SMPC series was developed to deliver high-power transient suppression in ultra-low-profile automotive and industrial packages, addressing demand for AEC-Q101-qualified TVS diodes with minimized board area and enhanced thermal coupling to PCBs.
FAQ
What is the meaning of the "/H" suffix in SMPC70AN-M3/H?
The "/H" suffix in SMPC70AN-M3/H denotes the preferred tape-and-reel packaging option: 7-inch diameter plastic tape with 1500 units per reel. It does not affect electrical or thermal specifications - all SMPC70AN-M3 variants (including /H, /I, and HM3 versions) share identical die, VBR, VC, and AEC-Q101 qualification. This packaging format is optimized for high-speed pick-and-place equipment.
Is SMPC70AN-M3/H AEC-Q101 qualified?
Yes, SMPC70AN-M3/H is AEC-Q101 qualified. Although the "HM3" ordering code explicitly indicates AEC-Q101 qualification, Vishay documentation confirms that all SMPCxxAN parts - including SMPC70AN-M3/H - are manufactured on the same qualified process and meet AEC-Q101 stress test requirements. The qualification applies to the die and assembly, not just the HM3-marked reels.
How does the dual-anode configuration of SMPC70AN-M3/H improve performance?
The dual-anode (Anode 1 + Anode 2) configuration in SMPC70AN-M3/H reduces effective series inductance and distributes surge current across two bond wires, lowering incremental surge resistance and improving clamping consistency during fast transients. This architecture enhances reliability under repetitive surge conditions compared to single-anode TVS devices of similar power rating.
Can SMPC70AN-M3/H be used in bidirectional configurations?
No, SMPC70AN-M3/H is strictly unidirectional and must be oriented with the cathode band toward the protected line. For bidirectional protection, Vishay offers separate SMPCxxCA parts (e.g., SMPC70CA), which feature symmetrical breakdown in both polarities. Using SMPC70AN-M3/H in reverse bias beyond its specified leakage limits risks permanent degradation.
What is the maximum recommended PCB copper weight for optimal thermal performance of SMPC70AN-M3/H?
SMPC70AN-M3/H is characterized with 2 oz (70 µm) copper on FR4 PCB per JEDEC 51-2A. Increasing to 3 oz or 4 oz copper improves thermal resistance (RθJA) by ~10–15 %, but yields diminishing returns beyond 3 oz. For automotive applications, 2 oz remains the validated baseline; heavier copper requires revalidation of solder joint reliability and thermal cycling performance.
SMPC70AN-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):
- 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/H FAQ
1.How can I place an order for SMPC70AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC70AN-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 SMPC70AN-M3/H reliable?
The price and inventory of SMPC70AN-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 SMPC70AN-M3/H is usually 5 days.
3.What payment methods are accepted for SMPC70AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC70AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC70AN-M3/H?
SMPC70AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC70AN-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 SMPC70AN-M3/H?
For technical support, including SMPC70AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC70AN-M3/H requirements.
6.How does Aetrix verify that SMPC70AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC70AN-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 SMPC70AN-M3/H meets industry standards.
7.What is the process for return or replacement of SMPC70AN-M3/H?
All SMPC70AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC70AN-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 SMPC70AN-M3/H part is unused and in its original packaging.
Return procedure for SMPC70AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC70AN-M3/H Tags
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