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Vishay General Semiconductor - Diodes Division SMAJ8.0-E3/61
- Part No.:
- SMAJ8.0-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0-E3/61.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,563
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Product details
Overview
SMAJ8.0-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping transient overvoltages on power and signal lines. It features 8.0 V stand-off voltage (VWM), 15.0 V maximum clamping voltage (VC) at 26.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMAJ8.0-E3/61 datasheet, SMAJ8.0-E3/61 pinout, SMAJ8.0-E3/61 application, or SMAJ8.0-E3/61 equivalent, key selection criteria include unidirectional polarity, 8.0 V reverse stand-off capability, low clamping ratio (VC/VWM = 1.88), JEDEC-compliant DO-214AC footprint, and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamping protection device that remains non-conductive below 8.0 V and rapidly avalanches above its breakdown threshold (6.40–7.82 V at 10 mA). Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1 ns) to ESD and lightning-induced transients.
Thermal design relies on low junction-to-lead thermal resistance (30 °C/W) and standard 0.2 × 0.2" copper pads for rated 400 W surge dissipation. It meets MSL Level 1 per J-STD-020 and supports solder reflow up to 260 °C for automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 5 V–8 V rail protection. |
| VBR (min/max) | 6.40 V / 7.82 V at 10 mA - Ensures reliable triggering across process variation; guarantees clamping activation within defined tolerance band. |
| VC @ IPPM | 15.0 V at 26.7 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream 12 V–15 V logic or analog components. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/42 Ω). |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms); supports high-energy inductive switching events in motor drives and relay circuits. |
| Junction Temp. | -55 °C to +150 °C - Enables operation in extended industrial and automotive under-hood environments without derating. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode indicated by a band on one end. Mounting requires 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal for full 400 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms return path during avalanche conduction. |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 5 V supply rail); conducts surge current to ground when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Supports IEC 61000-4-5 surge immunity testing up to 1 kV open-circuit voltage with 2 Ω source impedance. |
| Clamping ratio ≤1.88 | VC/VWM = 15.0/8.0 ensures minimal overvoltage exposure to sensitive 8 V–12 V interface ICs during transient events. |
| Glass-passivated junction | Provides stable leakage (<1.0 µA), consistent breakdown voltage, and long-term reliability under thermal cycling. |
| MSL Level 1 rating | Enables unlimited floor life and single-reflow processing without baking; simplifies manufacturing logistics. |
| RoHS-compliant E3 suffix | Meets EU Directive 2002/95/EC and JESD201 Class 1A whisker resistance; qualified for commercial-grade applications. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from solenoid and relay coils. IC Role / Device Role: Unidirectional TVS placed between MCU GPIO and external load switch to clamp negative-going transients. Use Value: Limits voltage excursion to ≤15.0 V during 40 A inductive turn-off, preventing latch-up or oxide damage in 3.3 V/5 V logic. |
Use Scenario: Shielding LIN bus transceivers and sensor inputs from battery dump load and alternator ripple. IC Role / Device Role: Standoff-rated clamping device on 12 V supply rail feeding body control unit sub-circuits. Use Value: Maintains 8.0 V nominal rail integrity while suppressing >100 V spikes to <15.0 V, ensuring uninterrupted CAN/LIN communication. |
| Consumer Power Adapters | Industrial PLC Digital Inputs |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V USB charging ports exposed to ESD and hot-plug transients. IC Role / Device Role: Fast-response clamping element placed directly at connector entry point before DC-DC regulator. Use Value: Responds in <1 ns to ±8 kV contact ESD (IEC 61000-4-2), limiting peak voltage to 15.0 V and preserving USB PHY integrity. |
Use Scenario: Input protection for 24 V digital input modules receiving signals from field sensors and switches. IC Role / Device Role: Primary transient suppressor on dry-contact input lines subject to lightning-induced surges. Use Value: Handles repetitive 10/1000 µs surges up to 26.7 A without degradation, extending module service life in outdoor installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A-E3/61 | Lower VBR range (6.40–7.07 V), tighter tolerance; 13.6 V clamping at 29.4 A; 300 W rating above 78 V only (not applicable here). | Offers improved clamping consistency for precision 5 V rail protection but slightly reduced surge margin (13.6 V vs. 15.0 V). | Select SMAJ8.0A-E3/61 when lower clamping voltage is prioritized over absolute peak power headroom. |
| SMBJ8.0-E3/52 | Same VWM and VC, but in larger DO-214AA (SMB) package; 600 W PPPM; higher thermal mass and 1.5× PCB area. | Better suited for high-reliability industrial systems requiring extended surge endurance or higher IPPM margin. | Choose SMBJ8.0-E3/52 when board space allows and 600 W surge rating is required for harsher environments. |
Compared with SMAJ8.0-E3/61, SMAJ8.0A-E3/61 delivers tighter VBR control and lower clamping voltage at the cost of slightly reduced surge current margin, while SMBJ8.0-E3/52 trades compactness for higher power handling and thermal robustness - making SMAJ8.0-E3/61 optimal for space-constrained 5 V–8 V protection where 400 W suffices.
Availability
SMAJ8.0-E3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, consumer power adapters, and PLC digital input protection requiring stable component supply and RoHS-compliant TVS solutions.
Supply support for SMAJ8.0-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and manufacturability.
The SMAJ series was engineered for surface-mount transient suppression in space-constrained, high-volume applications - delivering standardized DO-214AC performance with tight parametric control and automotive-grade process validation.
FAQ
What is the polarity configuration of SMAJ8.0-E3/61?
SMAJ8.0-E3/61 is a unidirectional TVS diode, with the banded end indicating the cathode terminal. It conducts only when the cathode is at a higher potential than the anode - making it suitable for DC rail protection where polarity is fixed. This differs from bi-directional variants (e.g., SMAJ8.0CA) which suppress transients regardless of polarity.
Does SMAJ8.0-E3/61 meet automotive qualification standards?
No - SMAJ8.0-E3/61 carries the commercial-grade E3 suffix and is not AEC-Q101 qualified. For automotive applications, Vishay offers the HE3-suffixed variant (e.g., SMAJ8.0HE3/61), which undergoes additional stress testing and screening per AEC-Q101 requirements while maintaining identical electrical specs and DO-214AC packaging.
What is the maximum clamping voltage of SMAJ8.0-E3/61 under surge conditions?
The maximum clamping voltage of SMAJ8.0-E3/61 is 15.0 V when subjected to its rated peak pulse current of 26.7 A using the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation and represents the highest voltage the protected circuit will experience during a full-rated transient event.
Can SMAJ8.0-E3/61 be used in bidirectional signal line protection?
No - SMAJ8.0-E3/61 is unidirectional and will conduct continuously if reverse-biased beyond its forward voltage (~3.5 V at 25 A), potentially damaging the circuit. For bidirectional protection (e.g., RS-485, USB D+/D−), use the CA-suffixed bi-directional version SMAJ8.0CA-E3/61, which exhibits symmetrical clamping in both directions.
What PCB pad layout is required to achieve the full 400 W rating for SMAJ8.0-E3/61?
To achieve the full 400 W peak pulse power rating, SMAJ8.0-E3/61 must be mounted on minimum 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88390. Smaller pads result in thermal derating - e.g., 0.1 × 0.1" pads reduce PPPM to ~200 W due to increased junction-to-ambient thermal resistance.
SMAJ8.0-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 26.7A
- 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)
SMAJ8.0-E3/61 FAQ
1.How can I place an order for SMAJ8.0-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0-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 SMAJ8.0-E3/61 reliable?
The price and inventory of SMAJ8.0-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 SMAJ8.0-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0-E3/61?
SMAJ8.0-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0-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 SMAJ8.0-E3/61?
For technical support, including SMAJ8.0-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0-E3/61 requirements.
6.How does Aetrix verify that SMAJ8.0-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0-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 SMAJ8.0-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0-E3/61?
All SMAJ8.0-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0-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 SMAJ8.0-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0-E3/61 Tags
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