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Vishay General Semiconductor - Diodes Division SMAJ8.0CA-E3/61
- Part No.:
- SMAJ8.0CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CA-E3/61.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
SMAJ8.0CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 8.0 V stand-off voltage (VWM), 6.40–7.07 V breakdown voltage (VBR) at 10 mA test current, and clamps to ≤13.6 V at 29.4 A peak pulse current (IPPM) under 10/1000 μs waveform - protecting sensitive ICs and MOSFETs in automotive sensor interfaces.
For engineers reviewing the SMAJ8.0CA-E3/61 datasheet, SMAJ8.0CA-E3/61 pinout, SMAJ8.0CA-E3/61 application, or SMAJ8.0CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, 400 W peak pulse power rating (10/1000 μs), low clamping ratio (VC/VBR ≈ 1.95), AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly on standard PCB pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (6.40 V / 7.07 V) and VC (13.6 V) in either direction. Its glass-passivated junction ensures stable leakage (<5.0 μA at VWM) and fast response time (<1.0 ps), enabling protection against ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The device delivers 400 W peak pulse power (derated to 300 W above 78 V) with low incremental surge resistance, and is rated for TJ = –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak, making it suitable for high-reliability industrial and automotive PCBs without marking or polarity orientation constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system supply or signal swing. |
| VBR (min/max) | 6.40 V / 7.07 V at IT = 10 mA - Confirmed bidirectional breakdown window; ensures consistent turn-on across polarity and temperature. |
| VC @ IPPM | 13.6 V at 29.4 A (10/1000 μs) - Clamped voltage seen by protected circuit; limits stress on downstream ICs during surge events. |
| PPPM | 400 W - Peak transient energy handling capacity; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | ≤5.0 μA - Low reverse leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized 2-pin SMD outline with 5.0 mm × 5.0 mm copper pad thermal design; compatible with JEDEC-compliant reflow. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no cathode band marking; symmetrical terminals with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient suppression; no polarity dependency simplifies layout and eliminates orientation errors. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; thermal resistance RθJA = 120 °C/W enables passive cooling on standard FR-4 with 5 mm² copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against load dump and inductive switching transients in 12 V automotive systems without derating below 78 V. |
| AEC-Q101 qualified option available | Base P/NHE3 suffix enables direct use in automotive ECUs and ADAS sensors where qualification is mandatory for production release. |
| Low clamping ratio (VC/VBR ≈ 1.95) | Minimizes overvoltage exposure to protected devices - critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows single-pass reflow with standard lead-free profiles - reduces manufacturing risk. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - improves field reliability in harsh environments. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller GPIOs from load dump, jump-start spikes, and ESD in vehicle door modules and seat control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching transceiver IC. Use Value: Limits voltage to ≤13.6 V during 29.4 A transients, preventing latch-up or gate oxide damage in 5 V tolerant CAN PHYs while maintaining signal integrity at 500 kbps. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance (≈150 pF typical at 0 V) TVS placed differential-line-to-ground to suppress common-mode surges without distorting data edges. Use Value: Clamps 1 kV/0.5 Ω surge to <15 V within nanoseconds, preserving bit error rate (BER) in 2 Mbps CAN FD networks operating at ambient up to +105 °C. |
| Consumer IoT Power Input Protection | Telecom DC Power Feeding Protection |
|
Use Scenario: Securing USB-C PD and barrel jack inputs of smart home hubs against accidental AC adapter misconnection and ESD during plugging. IC Role / Device Role / Timing Role: Primary front-end TVS on 5–12 V input rail, coordinated with upstream fuse and downstream DC-DC converter OVP. Use Value: Absorbs 400 W surges without degradation, enabling compliance with IEC 61000-4-2 Level 4 (±15 kV air) and UL 62368-1 transient requirements. |
Use Scenario: Protecting PoE-powered access points and small cell radios receiving 48 V DC over Ethernet cables subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Bidirectional line-to-ground suppressor on each pair, sized to handle 10/1000 μs surges up to 100 A without thermal runaway. Use Value: Maintains <13.6 V clamping across full operating temperature range, ensuring PoE controller ICs (e.g., TPS2375) remain within 16 V ABS MAX rating. |
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 | Unidirectional variant; same VWM, VBR, VC, and PPPM but requires correct polarity placement and includes cathode band marking. | Applicable only where circuit topology enforces fixed polarity (e.g., DC power rails with defined ground reference). | Select when protecting unidirectional supplies or signals where reverse conduction must be blocked - not interchangeable with SMAJ8.0CA-E3/61 without layout change. |
| SMBJ8.0CA-E3/52 | Same electrical specs but in larger SMB (DO-214AA) package; higher thermal mass (RθJA = 80 °C/W), 600 W PPPM rating. | Better suited for higher-energy surges or elevated ambient temperatures (>105 °C); occupies more board area. | Choose when system-level surge testing exceeds 400 W or thermal budget demands lower junction rise - requires footprint redesign. |
Compared with SMAJ8.0A-E3/61, SMAJ8.0CA-E3/61 offers polarity-agnostic placement and eliminates orientation risk, while SMBJ8.0CA-E3/52 trades compactness for enhanced thermal and surge margin - selection depends on layout constraints, surge profile severity, and qualification requirements.
Availability
SMAJ8.0CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer IoT power inputs, and telecom DC feeding circuits requiring stable component supply, RoHS-compliant sourcing, and traceable lot-level documentation.
Supply support for SMAJ8.0CA-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, precision, and automotive-grade qualification.
The SMAJ series is engineered for high-speed transient suppression in space-constrained, high-reliability applications - targeting automotive, industrial, and communications systems where robust ESD and surge immunity are non-negotiable.
FAQ
What is the clamping voltage of SMAJ8.0CA-E3/61 at its rated peak pulse current?
The SMAJ8.0CA-E3/61 clamps to a maximum of 13.6 V at its specified peak pulse current of 29.4 A under the standardized 10/1000 μs waveform. This value is measured across both directions due to its bidirectional construction and is guaranteed across the full operating temperature range of –55 °C to +150 °C. The clamping performance ensures protected ICs remain within safe voltage margins during real-world surge events.
Is SMAJ8.0CA-E3/61 suitable for automotive applications requiring AEC-Q101 qualification?
SMAJ8.0CA-E3/61 itself is the commercial-grade RoHS-compliant version (E3 suffix). However, the identical device with HE3 suffix - SMAJ8.0CAHE3_A - is AEC-Q101 qualified and shares the same electrical characteristics, package, and thermal behavior. For automotive production, specify the HE3 variant; SMAJ8.0CA-E3/61 may be used in pre-qualification prototyping or non-safety-critical subsystems.
How does the bidirectional nature of SMAJ8.0CA-E3/61 affect PCB layout compared to unidirectional TVS diodes?
The SMAJ8.0CA-E3/61 has no polarity marking and functions identically in both directions, eliminating orientation checks during placement and reducing assembly errors. Unlike unidirectional variants such as SMAJ8.0A-E3/61 - which require cathode alignment - SMAJ8.0CA-E3/61 allows symmetric routing on differential lines or floating inputs, simplifying layout for CAN, RS-485, or AC-coupled signal paths without compromising protection integrity.
What is the maximum reverse leakage current of SMAJ8.0CA-E3/61 at its 8.0 V stand-off voltage?
At the rated stand-off voltage of 8.0 V and TA = 25 °C, the SMAJ8.0CA-E3/61 exhibits a maximum reverse leakage current (ID) of 5.0 μA. This low leakage ensures minimal power loss in battery-powered systems and avoids false triggering in high-impedance sensing circuits. Leakage remains well below 10 μA even at +85 °C, supporting reliable operation in extended temperature environments.
Can SMAJ8.0CA-E3/61 be used in parallel to increase surge current handling?
No - SMAJ8.0CA-E3/61 is not characterized or recommended for parallel operation. Variations in VBR (6.40–7.07 V) and dynamic impedance between units can cause uneven current sharing, leading to thermal runaway in one device. For higher surge ratings, select a single higher-power device such as SMBJ8.0CA-E3/52 or SMCJ8.0CA-E3/57 instead of paralleling SMAJ8.0CA-E3/61 units.
SMAJ8.0CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- 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)
SMAJ8.0CA-E3/61 FAQ
1.How can I place an order for SMAJ8.0CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CA-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 SMAJ8.0CA-E3/61 reliable?
The price and inventory of SMAJ8.0CA-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 SMAJ8.0CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CA-E3/61?
SMAJ8.0CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CA-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 SMAJ8.0CA-E3/61?
For technical support, including SMAJ8.0CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ8.0CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CA-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 SMAJ8.0CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CA-E3/61?
All SMAJ8.0CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CA-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 SMAJ8.0CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0CA-E3/61 Tags
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