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Vishay General Semiconductor - Diodes Division SMP7.0A-M3/85A
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- Part No.:
- SMP7.0A-M3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP7.0A-M3/85A.pdf
- Description:
- TVS DIODE 7VWM 12VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,008
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Product details
Overview
SMP7.0A-M3/85A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMP (DO-220AA) package, rated for 400 W peak pulse power (10/1000 μs), 7.0 V stand-off voltage (VWM), and 12.0 V maximum clamping voltage at 33.3 A peak surge current. It protects sensitive ICs and MOSFETs against inductive switching transients in industrial and telecom power rails.
For engineers reviewing the SMP7.0A-M3/85A datasheet, SMP7.0A-M3/85A pinout, SMP7.0A-M3/85A application, or SMP7.0A-M3/85A equivalent, key selection criteria include clamping voltage at rated IPPM, unidirectional polarity, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode designed to clamp transient overvoltages before they damage downstream circuitry. Its breakdown voltage range is 7.78 V to 8.60 V at 10 mA test current, with low incremental surge resistance ensuring stable clamping under repetitive surge conditions.
The SMP7.0A-M3/85A features a fast response time (<1 ns), meets JESD201 Class 2 whisker resistance, and is halogen-free, RoHS-compliant, and rated for junction temperatures up to +150 °C - making it suitable for high-reliability industrial PCB layouts with tight thermal constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Ensures predictable turn-on threshold across production lot |
| VC @ IPPM | 12.0 V at 33.3 A - Clamping voltage during 10/1000 μs surge; determines protected circuit's maximum stress level |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; validates robustness against common ESD/lightning surges |
| IFSM | 40 A - Non-repetitive forward surge rating; supports inrush current immunity during power-up events |
| TJ max | +150 °C - Maximum junction temperature; enables operation in enclosed industrial enclosures without forced cooling |
| RθJA | 250 °C/W - Junction-to-ambient thermal resistance; informs minimum required copper pad area for thermal management |
Pinout & Package
Package: SMP (DO-220AA), surface-mount, single-ended anode-cathode configuration with cathode band marking. Dimensions: 3.61 mm × 2.18 mm × 1.0 mm (L × W × H), MSL Level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line or ground return path | Defines current direction during clamping - must be placed on side of circuit requiring voltage limiting relative to reference |
| Cathode | Current exit terminal in forward bias; marked by color band; tied to system ground or lower-potential rail | Establishes polarity-sensitive connection - reversal prevents clamping and risks device failure under surge |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile height | 1.0 mm typical - enables use in space-constrained modules and ultra-thin consumer electronics assemblies |
| Automated placement compatibility | DO-220AA footprint with standardized lead geometry - supports high-speed pick-and-place at >25,000 UPH |
| Clamping performance | 12.0 V VC at 33.3 A - limits voltage overshoot to safe levels for 3.3 V and 5 V logic interfaces |
| Thermal reliability | MSL Level 1 + 260 °C reflow peak - eliminates pre-bake requirement and simplifies manufacturing flow |
| Material compliance | Halogen-free, RoHS-compliant, JESD201 Class 2 whisker resistant - satisfies industrial and automotive supply chain requirements |
Applications
| Industrial Motor Drive Protection | Telecom Power Supply Input |
|---|---|
Use Scenario: Suppresses voltage spikes generated by relay coil de-energization and IGBT switching in PLC output modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus lines upstream of gate drivers and microcontrollers. Use Value: Limits transient excursions to ≤12.0 V, preventing latch-up or oxide breakdown in 3.3 V control ICs operating near 24 V rails. |
Use Scenario: Guards primary-side input of isolated DC/DC converters against lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: First-line transient suppression before input filter capacitors and rectifier stages. Use Value: Absorbs 400 W pulses without degradation, maintaining converter uptime during field-deployed surge events per IEC 61000-4-5. |
| Automotive Body Control Module | Consumer Sensor Interface Protection |
Use Scenario: Shields LIN bus transceivers and window motor drivers from load dump and jump-start transients in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional clamp between VBAT and GND, sized for 33.3 A peak current per ISO 7637-2 Pulse 1/2a. Use Value: Delivers 12.0 V clamping at rated surge, keeping transceiver supply within ABSOLUTE MAX ratings during 100 V/100 ms load dump events. |
Use Scenario: Protects analog outputs of environmental sensors (e.g., humidity, pressure) from ESD coupling via long flex cables in smart home hubs. IC Role / Device Role / Timing Role: Localized TVS on sensor signal lines adjacent to connector interface. Use Value: Sub-1 ns response ensures clamping occurs before ESD pulse reaches ADC input, preserving measurement integrity per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP7.0A-M3/84A | Identical electrical specs; differs only in packaging - 3000-unit 7" tape vs. 10000-unit 13" tape | Same protection function; suited for low-volume prototyping or small-batch production | Select /84A when reel size or quantity aligns with SMT line feeder constraints or inventory planning cycles |
| SMAJ7.0A | Higher RθJA (350 °C/W), larger SMA package (4.5 mm × 2.7 mm), same VWM/VC but lower IPPM (32.1 A) | Less effective thermal dissipation in dense layouts; requires larger pad area for equivalent surge handling | Choose SMAJ7.0A only if legacy board design uses SMA footprint and no layout revision is feasible |
Compared with SMP7.0A-M3/85A, the /84A variant offers identical protection performance in smaller reels for flexibility, while SMAJ7.0A trades compactness and thermal efficiency for backward footprint compatibility - making SMP7.0A-M3/85A optimal for new designs prioritizing miniaturization and high-volume manufacturability.
Availability
SMP7.0A-M3/85A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer sensor interfaces requiring stable component supply and guaranteed long-term sourcing.
Supply support for SMP7.0A-M3/85A 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, precision, and application-specific optimization.
The SMP series was engineered for high-density surface-mount transient suppression in space-constrained, high-reliability systems - delivering industry-leading power density and MSL Level 1 process compatibility in the DO-220AA package.
FAQ
What is the clamping voltage of SMP7.0A-M3/85A at its rated peak pulse current?
The SMP7.0A-M3/85A has a maximum clamping voltage (VC) of 12.0 V at its rated peak pulse current (IPPM) of 33.3 A, measured under the standard 10/1000 μs waveform. This value is critical for verifying that downstream components - such as 3.3 V or 5 V microcontrollers - remain within their absolute maximum voltage ratings during surge events. The SMP7.0A-M3/85A maintains this clamping performance across its full operating temperature range.
Does SMP7.0A-M3/85A support lead-free reflow soldering?
Yes, the SMP7.0A-M3/85A is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals ensure reliable wetting and intermetallic formation without pre-baking. This makes SMP7.0A-M3/85A compatible with standard high-volume SMT assembly lines using SAC305 or similar alloys.
How does the SMP7.0A-M3/85A differ from SMP7.0A-M3/84A?
The SMP7.0A-M3/85A and SMP7.0A-M3/84A share identical electrical specifications, thermal characteristics, and mechanical dimensions. Their sole difference is packaging: SMP7.0A-M3/85A ships in 10,000-unit reels on 13" diameter tape, while SMP7.0A-M3/84A uses 3,000-unit reels on 7" tape. Both are fully interchangeable electrically and mechanically - the choice depends solely on production volume and SMT feeder compatibility.
What is the standoff voltage rating for SMP7.0A-M3/85A?
The SMP7.0A-M3/85A has a reverse stand-off voltage (VWM) of 7.0 V, meaning it remains in high-impedance state up to this DC or continuous AC voltage level. This allows integration into 5 V or 7 V power domains without leakage concerns, while still triggering reliably above 7.78 V (minimum breakdown). The 7.0 V VWM provides a 10% margin below nominal system voltage in many 8 V rail applications.
Can SMP7.0A-M3/85A be used in bidirectional configurations?
No, the SMP7.0A-M3/85A is a unidirectional transient voltage suppressor, designed for polarity-specific placement with cathode grounded. It does not provide symmetrical clamping for AC signals or bipolar transients. For bidirectional protection, Vishay offers separate dual-diode configurations (e.g., SMBJ7.0CA) - the SMP7.0A-M3/85A must be used only in circuits where polarity is fixed and known, such as DC power line protection.
SMP7.0A-M3/85A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- Power - Peak Pulse:
- 400W
- 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:
- DO-220AA (SMP)
SMP7.0A-M3/85A FAQ
1.How can I place an order for SMP7.0A-M3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP7.0A-M3/85A 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 SMP7.0A-M3/85A reliable?
The price and inventory of SMP7.0A-M3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP7.0A-M3/85A is usually 5 days.
3.What payment methods are accepted for SMP7.0A-M3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP7.0A-M3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP7.0A-M3/85A?
SMP7.0A-M3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP7.0A-M3/85A 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 SMP7.0A-M3/85A?
For technical support, including SMP7.0A-M3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP7.0A-M3/85A requirements.
6.How does Aetrix verify that SMP7.0A-M3/85A is sourced from the original manufacturer or authorized distributors?
All SMP7.0A-M3/85A 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 SMP7.0A-M3/85A meets industry standards.
7.What is the process for return or replacement of SMP7.0A-M3/85A?
All SMP7.0A-M3/85A units undergo pre-shipment inspection (PSI). If there is an issue with SMP7.0A-M3/85A, 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 SMP7.0A-M3/85A part is unused and in its original packaging.
Return procedure for SMP7.0A-M3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP7.0A-M3/85A Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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