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Vishay General Semiconductor - Diodes Division SMAJ8.0C-E3/61
- Part No.:
- SMAJ8.0C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0C-E3/61.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,278
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Product details
Overview
SMAJ8.0C-E3/61 from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features 8.0 V stand-off voltage (VWM), 15.0 V maximum clamping voltage (VC) at 26.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for signal-line protection in automotive sensor interfaces and industrial I/O modules.
For engineers reviewing the SMAJ8.0C-E3/61 datasheet, SMAJ8.0C-E3/61 pinout, SMAJ8.0C-E3/61 application, or SMAJ8.0C-E3/61 equivalent, key selection criteria include bi-directional surge capability, low clamping ratio (VC/VWM = 1.88), RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 9.44–11.5 V (min/max) under 1.0 mA test current. Its clamping behavior is characterized by low incremental surge resistance and fast response time-typical junction capacitance is <100 pF at 1 MHz and VWM, enabling use on high-speed data lines without signal integrity degradation.
The device complies with ANSI/IEEE C62.35 for transient suppression, supports repetitive surge duty cycle of 0.01 %, and is rated for operating junction temperature from –55 °C to +150 °C. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring appropriate PCB copper area for thermal management during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for protected circuit. |
| VC @ IPPM | 15.0 V - Clamped voltage across device at 26.7 A surge; limits stress on downstream ICs during 10/1000 µs transients. |
| IPPM | 26.7 A - Peak surge current handled with 10/1000 µs waveform; determines minimum trace width and PCB layout robustness. |
| PPPM | 400 W - Peak pulse power dissipation; validates suitability for automotive load-dump and industrial EFT immunity requirements. |
| VBR min/max | 9.44 V / 11.5 V - Breakdown voltage range at 1.0 mA; ensures reliable turn-on while avoiding false triggering near VWM. |
| ID @ VWM | 10 µA - Reverse leakage at 8.0 V; negligible loading on low-power sensor bias networks and analog front-ends. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminal design allows orientation-agnostic placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Bi-directional conduction: either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Case (cathode band absent) | Thermal and mechanical interface | DO-214AC body provides mechanical anchoring and heat sinking via soldered leads; no internal ground connection. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional suppression | Protects AC-coupled or differential signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity constraints. |
| 400 W peak pulse power | Meets IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-earth) surge immunity when properly mounted. |
| MSL Level 1, 260 °C reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning or special handling. |
| RoHS-compliant matte tin plating | Ensures solderability per J-STD-002/JESD22-B102 and whisker resistance per JESD201 Class 1A (E3 suffix). |
| Low clamping ratio (VC/VWM = 1.88) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfaces with tight VDD margins. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus Protection |
|---|---|
|
Use Scenario: Protecting wheel speed, pressure, or temperature sensors connected to vehicle ECUs against ISO 7637-2 pulse 1/2a/5a transients and ESD events. IC Role / Device Role: Bi-directional TVS placed between sensor signal line and ground, shunting surge energy before reaching analog front-end or microcontroller input. Use Value: Prevents latch-up or permanent damage to 12-bit ADC inputs and op-amp buffers operating at 5 V supply, maintaining ASIL-B functional safety compliance. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor drive noise and long-cable EFT coupling. IC Role / Device Role: Line-to-line and line-to-ground TVS pair on A/B differential bus lines, limiting common-mode and differential-mode surges. Use Value: Enables uninterrupted communication at 10 Mbps over 1200 m cable runs by clamping transients below transceiver absolute maximum ratings (±15 V). |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB 2.0 D+ and D− lines in set-top boxes and smart displays from human-body-model ESD (±8 kV contact). IC Role / Device Role: Bi-directional TVS array placed directly at USB connector, with low capacitance minimizing signal rise-time degradation. Use Value: Maintains full-speed USB signaling integrity (480 Mbps) while passing IEC 61000-4-2 Level 4 ESD testing without firmware reset or disconnect events. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers in residential gateways against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role: Primary surge clamp on line-side transformer secondary, coordinated with gas discharge tube (GDT) upstream. Use Value: Limits let-through voltage to <25 V peak during 10/700 µs telecom surges, preserving 12-bit DAC linearity and preventing codec latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CA-E3/61 | Identical electrical specs and packaging; CA suffix denotes same bi-directional construction as C variant per Vishay documentation. | No functional difference-CA and C are interchangeable per Vishay's ordering note and device marking table. | Select SMAJ8.0CA-E3/61 only if legacy BOM specifies CA; otherwise SMAJ8.0C-E3/61 is functionally identical and fully substitutable. |
| SMBJ8.0C-E3/52 | Same VWM (8.0 V) and VC (15.0 V), but SMB package (DO-214AA) offers 600 W PPPM and higher IPPM (43.5 A); larger footprint and thermal mass. | Better suited for higher-energy surges (e.g., 10/1000 µs 1 kV tests) where PCB space permits larger package; not drop-in due to different pad layout. | Choose SMBJ8.0C-E3/52 when surge threat level exceeds 400 W or thermal derating margin is critical; verify PCB land pattern compatibility before substitution. |
Compared with SMAJ8.0C-E3/61, SMAJ8.0CA-E3/61 offers no performance or reliability distinction, while SMBJ8.0C-E3/52 delivers higher surge capacity at the cost of larger board area and non-interchangeable mounting-making SMAJ8.0C-E3/61 optimal for space-constrained 400 W-class protection.
Availability
SMAJ8.0C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer USB port protection requiring stable component supply, consistent RoHS compliance, and MSL Level 1 reflow readiness.
Supply support for SMAJ8.0C-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 robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where failure due to ESD or surge must be eliminated at the board level.
FAQ
What is the polarity configuration of SMAJ8.0C-E3/61?
SMAJ8.0C-E3/61 is a bi-directional TVS diode with symmetrical terminals and no polarity marking-neither end is designated anode or cathode. This allows flexible PCB placement on AC-coupled or differential signal paths without orientation constraints, unlike uni-directional variants such as SMAJ8.0A-E3/61 which require correct band alignment.
Does SMAJ8.0C-E3/61 meet AEC-Q101 qualification?
No, SMAJ8.0C-E3/61 is commercial-grade (E3 suffix) and not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, select the HE3-suffix variant (e.g., SMAJ8.0CHE3/61), which undergoes extended reliability testing including temperature cycling, humidity bias, and accelerated life testing per the AEC standard.
What is the maximum clamping voltage of SMAJ8.0C-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ8.0C-E3/61 is 15.0 V when subjected to its rated peak pulse current of 26.7 A using the standardized 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMAJ8.0C-E3/61 be used for USB 2.0 data line protection?
Yes, SMAJ8.0C-E3/61 is suitable for USB 2.0 D+ and D− line protection due to its bi-directional operation, low clamping voltage (15.0 V), and typical junction capacitance below 100 pF at 1 MHz. It maintains signal integrity up to 480 Mbps while providing ±15 kV air-gap and ±8 kV contact ESD protection per IEC 61000-4-2.
What is the thermal resistance specification for SMAJ8.0C-E3/61?
SMAJ8.0C-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on the recommended 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pad layout. These values inform thermal design for repeated surge events and steady-state power dissipation in enclosed environments.
SMAJ8.0C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ8.0C-E3/61 FAQ
1.How can I place an order for SMAJ8.0C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0C-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 SMAJ8.0C-E3/61 reliable?
The price and inventory of SMAJ8.0C-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 SMAJ8.0C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0C-E3/61?
SMAJ8.0C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0C-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 SMAJ8.0C-E3/61?
For technical support, including SMAJ8.0C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0C-E3/61 requirements.
6.How does Aetrix verify that SMAJ8.0C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0C-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 SMAJ8.0C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0C-E3/61?
All SMAJ8.0C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0C-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 SMAJ8.0C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0C-E3/61 Tags
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