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Vishay General Semiconductor - Diodes Division SMAJ7.0A-E3/61
- Part No.:
- SMAJ7.0A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0A-E3/61.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,149
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Product details
Overview
SMAJ7.0A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA test current, and clamps up to 12.0 V at 33.3 A peak pulse current (IPPM) under 10/1000 μs waveform.
For engineers reviewing the SMAJ7.0A-E3/61 datasheet, SMAJ7.0A-E3/61 pinout, SMAJ7.0A-E3/61 application, or SMAJ7.0A-E3/61 equivalent, key selection considerations include its 400 W peak pulse power rating, low 0.065 %/°C temperature coefficient of VBR, RoHS-compliant matte tin-plated leads, and suitability for automotive-grade designs when ordered with HE3 suffix.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the unidirectional polarity (cathode band marked) enables integration into DC-biased signal or power lines without forward conduction interference.
The SMAJ7.0A-E3/61 delivers 400 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, derating to 300 W above 78 V, and supports 40 A non-repetitive forward surge current (IFSM). Thermal resistance is 120 °C/W junction-to-ambient on standard 0.2" × 0.2" copper pads, enabling reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 7.78 V / 8.60 V at IT = 10 mA - Confirmed breakdown range ensures predictable turn-on threshold across production lots. |
| VC @ IPPM | 12.0 V at 33.3 A - Clamping voltage during worst-case transient; limits stress on downstream ICs like microcontrollers or MOSFET gates. |
| PPPM | 400 W (10/1000 μs) - Peak energy absorption capability; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| ID @ VWM | 200 μA - Low leakage at rated stand-off voltage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without thermal derating penalties. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline compatible with automated pick-and-place and reflow soldering per J-STD-020 MSL level 1. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by a visible band on the body. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode | Avalanche conduction terminal / Clamping node | Marked with band; connected to higher-potential side (e.g., VCC or signal line); conducts during overvoltage to clamp voltage to VC. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against high-energy transients such as ISO 7637-2 Pulse 5a without external series impedance. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime, critical for automotive reliability. |
| MSL level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced popcorning; eliminates pre-bake requirement in high-volume SMT lines. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance mandates without halogen content restrictions; suitable for consumer and industrial end equipment. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 15 kV), improving immunity of CMOS inputs and analog sensors. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp spikes exceeding 7.0 V. Use Value: Limits voltage seen by MCU power rails to ≤12.0 V during 400 W surges, preventing latch-up or permanent damage. |
Use Scenario: Shielding 4–20 mA current loop transmitters from field wiring-induced surges. IC Role / Device Role / Timing Role: Parallel-connected clamping device on analog input/output lines to absorb induced transients. Use Value: Maintains signal accuracy by holding common-mode voltage within ±12.0 V during 33.3 A pulses, preserving ADC resolution. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 data lines and VBUS against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS rail to shunt fast transients before reaching USB controller. Use Value: Responds in <1 ns to clamp 8 kV HBM strikes to ≤12.0 V, meeting IEC 61000-4-2 Level 4 requirements. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers exposed to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary clamping element on line-side transformer secondary windings. Use Value: Absorbs 10/1000 μs surges up to 400 W without degradation, extending service life of line interface ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package. | Required for halogen-free compliance programs (e.g., EU WEEE, Japan JIS C 0950). | Select when environmental compliance mandates absence of brominated flame retardants. |
| SMAJ7.0CA-E3/61 | Bidirectional version with same VWM (7.0 V), symmetric VBR (±7.78–8.60 V), and identical PPPM/VC ratings. | Used in AC-coupled or floating signal paths where polarity reversal may occur (e.g., RS-485, audio lines). | Choose for bidirectional protection needs; not pin-compatible due to lack of polarity marking and different conduction symmetry. |
Compared with SMAJ7.0A-E3/61, the M3 variant offers identical protection performance with halogen-free molding compound, while the SMAJ7.0CA-E3/61 provides symmetrical clamping for AC signals but requires layout verification for polarity-insensitive placement.
Availability
SMAJ7.0A-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer USB power delivery, and telecom line protection requiring stable component supply and full traceability.
Supply support for SMAJ7.0A-E3/61 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series was developed for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where consistent clamping voltage and surge endurance are mission-critical.
FAQ
What is the maximum clamping voltage of the SMAJ7.0A-E3/61 under peak pulse conditions?
The SMAJ7.0A-E3/61 has a maximum clamping voltage (VC) of 12.0 V at 33.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ7.0A-E3/61 maintains this clamping performance without degradation when mounted per recommended pad layout.
Is the SMAJ7.0A-E3/61 suitable for automotive applications?
The SMAJ7.0A-E3/61 is qualified to AEC-Q101 when ordered with the HE3 suffix (e.g., SMAJ7.0AHE3_A), but the E3/61 variant is commercial-grade and not AEC-Q101 certified. For non-automotive applications requiring automotive-level robustness, engineers must specify the HE3 version. The SMAJ7.0A-E3/61 itself meets all electrical and thermal specifications needed for under-dash modules, though formal qualification requires the HE3 suffix.
What does the "-E3/61" suffix indicate in SMAJ7.0A-E3/61?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads and halogen-containing molding compound. The "/61" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 1800 units per reel. This format supports high-speed automated assembly and is standard for SMT production lines using the SMAJ7.0A-E3/61.
How does the SMAJ7.0A-E3/61 compare to SMAJ6.0A-E3/61 in terms of stand-off voltage and clamping performance?
The SMAJ7.0A-E3/61 has a 7.0 V stand-off voltage (VWM) versus 6.0 V for SMAJ6.0A-E3/61, offering higher DC bias margin for 5 V–7 V systems. Its clamping voltage is 12.0 V at 33.3 A, compared to 10.3 V at 38.8 A for the SMAJ6.0A-E3/61-indicating tighter voltage control at lower surge currents but slightly higher clamped voltage at rated IPPM. The SMAJ7.0A-E3/61 is preferred where system VCC tolerances exceed ±10 % of nominal rail.
Can the SMAJ7.0A-E3/61 be used in bidirectional signal protection?
No-the SMAJ7.0A-E3/61 is unidirectional and contains a polarity-sensitive cathode band; applying reverse voltage beyond its breakdown rating will cause avalanche conduction only in one direction. For bidirectional signal lines (e.g., RS-485, CAN, audio), the SMAJ7.0CA-E3/61 variant must be used instead. Using SMAJ7.0A-E3/61 in AC-coupled paths risks unintended conduction and failure.
SMAJ7.0A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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-214AC (SMA)
SMAJ7.0A-E3/61 FAQ
1.How can I place an order for SMAJ7.0A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0A-E3/61 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 SMAJ7.0A-E3/61 reliable?
The price and inventory of SMAJ7.0A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.0A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0A-E3/61?
SMAJ7.0A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0A-E3/61 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 SMAJ7.0A-E3/61?
For technical support, including SMAJ7.0A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0A-E3/61 requirements.
6.How does Aetrix verify that SMAJ7.0A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0A-E3/61 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 SMAJ7.0A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.0A-E3/61?
All SMAJ7.0A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0A-E3/61, 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 SMAJ7.0A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.0A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0A-E3/61 Tags
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