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Vishay General Semiconductor - Diodes Division SMAJ10A-E3/5A
- Part No.:
- SMAJ10A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10A-E3/5A.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,907
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Product details
Overview
SMAJ10A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on power and signal lines. It features a 10 V standoff voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, clamps transients to ≤17.0 V at 23.5 A peak pulse current (IPPM), and delivers 400 W peak pulse power (10/1000 μs waveform). It is widely deployed in automotive infotainment power rails and industrial sensor interfaces.
For engineers reviewing the SMAJ10A-E3/5A datasheet, SMAJ10A-E3/5A pinout, SMAJ10A-E3/5A application, or SMAJ10A-E3/5A equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility with automated placement, AEC-Q101 qualification eligibility (via HE3 suffix variants), and precise clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a voltage-clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting transient energy to ground while limiting downstream voltage to ≤17.0 V. Its glass-passivated junction ensures stable leakage (<1.0 μA at 10 V) and fast response time (<1.0 ps), critical for protecting sensitive CMOS inputs and MOSFET gate drivers.
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and exhibits a low thermal resistance of 30 °C/W (junction-to-lead), enabling reliable operation on standard PCB copper pads without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 10 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 11.1–12.3 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | ≤17.0 V at 23.5 A - Peak voltage seen by protected circuit during 10/1000 μs surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump and inductive switching events. |
| IPPM (Peak Pulse Current) | 23.5 A - Maximum transient current the device safely shunts without degradation. |
| RθJL (Junction-to-Lead Thermal Resistance) | 30 °C/W - Enables efficient heat transfer to PCB traces; supports continuous 3.3 W power dissipation at 50 °C ambient. |
| TJmax | +150 °C - Allows operation in under-hood automotive and industrial environments with minimal derating. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; anode and cathode terminals are axially aligned along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference node / ground return | Typically tied to system ground or low-impedance return path; completes clamping current loop. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching and ISO 7637-2 pulse 5a without failure. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, lightning-induced surges). |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage current across temperature and lifetime stress. |
| MSL Level 1 (J-STD-020), 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualification option (HE3/HM3 suffixes) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in vehicle infotainment head units against load-dump transients (ISO 16750-2) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤17.0 V during 400 W surges, preventing damage to buck controller ICs and ensuring system reset-free operation. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor transmitter output, mounted adjacent to connector. Use Value: Clamps fast ESD events (IEC 61000-4-2 ±8 kV contact) within nanoseconds, preserving 16-bit ADC accuracy and avoiding false readings. |
| Consumer USB Port Surge Protection | Telecom Base Station DC Feeder Protection |
|
Use Scenario: Safeguarding VBUS and D+/D− lines in USB 2.0 host ports of smart displays against hot-plug induced transients and nearby ESD. IC Role / Device Role / Timing Role: Discrete TVS array (dual or quad) with SMAJ10A-E3/5A used per line for cost-effective discrete solution. Use Value: Sub-17 V clamping prevents latch-up in USB transceivers and maintains enumeration reliability after repeated surge exposure. |
Use Scenario: Secondary overvoltage protection on –48 V DC feeder lines entering telecom base station cabinets, downstream of primary MOV-based protection. IC Role / Device Role / Timing Role: Fast-response secondary clamp absorbing residual ringwave energy after upstream suppression. Use Value: 23.5 A IPPM capacity handles residual 10/1000 μs surges from lightning-induced coupling, extending power supply MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same thermal and clamping performance. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Choose SMAJ10A-M3/5A when halogen-free bill-of-materials is required; no design or layout changes needed. |
| SMAJ10CA-E3/5A | Bidirectional version with symmetric 11.1–12.3 V breakdown in both polarities; same VC (17.0 V), PPPM (400 W), and package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where reverse polarity transients must also be clamped. | Use SMAJ10CA-E3/5A only when bidirectional protection is essential; unidirectional SMAJ10A-E3/5A is preferred for DC power rails to avoid unnecessary leakage paths. |
Compared with SMAJ10A-M3/5A, the SMAJ10A-E3/5A offers identical protection performance with standard RoHS compliance but excludes halogen-free certification; compared with SMAJ10CA-E3/5A, it provides lower leakage and optimized clamping for DC-biased circuits, making it the preferred choice for power rail applications.
Availability
SMAJ10A-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power port protection requiring stable component supply and full traceability.
Supply support for SMAJ10A-E3/5A 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 validation.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments-designed specifically for automotive, industrial, and telecom systems where consistent clamping, low leakage, and AEC-Q101 readiness are mandatory.
FAQ
What is the maximum clamping voltage of the SMAJ10A-E3/5A under a 10/1000 μs surge?
The SMAJ10A-E3/5A clamps to a maximum of 17.0 V when subjected to its rated peak pulse current of 23.5 A using the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and represents the highest voltage the protected circuit will experience during such a transient event. The SMAJ10A-E3/5A maintains this clamping performance across its full operating temperature range.
Is the SMAJ10A-E3/5A suitable for automotive applications?
The SMAJ10A-E3/5A itself is commercial-grade, but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., SMAJ10AHE3_A/I). These variants undergo rigorous stress testing for automotive use, including temperature cycling, humidity bias, and accelerated life testing. For non-automotive designs, the SMAJ10A-E3/5A remains fully suitable for industrial and consumer applications requiring robust transient suppression.
What does the "E3/5A" suffix indicate in SMAJ10A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/5A" specifies the packaging format: 7500 units per 13-inch plastic tape-and-reel. This contrasts with "/61", which indicates 1800 units per 7-inch reel. Both formats maintain identical electrical and thermal specifications for the SMAJ10A-E3/5A device.
How does the SMAJ10A-E3/5A differ from the bidirectional SMAJ10CA-E3/5A?
The SMAJ10A-E3/5A is unidirectional, with a cathode band marking and asymmetric conduction (avalanche only in reverse bias), whereas the SMAJ10CA-E3/5A is bidirectional, offering symmetrical breakdown in both polarities and no polarity marking. Their clamping voltage (17.0 V), peak power (400 W), and package are identical-but SMAJ10A-E3/5A exhibits lower reverse leakage (<1.0 μA at 10 V) and is preferred for DC power lines, while SMAJ10CA-E3/5A suits AC or floating signal paths like CAN or RS-485.
What is the thermal resistance and maximum power dissipation of the SMAJ10A-E3/5A?
The SMAJ10A-E3/5A has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W and a maximum steady-state power dissipation (PD) of 3.3 W at 50 °C ambient on an infinite heatsink. On standard 0.2" × 0.2" copper pads, its derated power handling remains sufficient for most transient-suppression duty cycles, and its 150 °C maximum junction temperature supports operation in high-ambient environments. The SMAJ10A-E3/5A does not require external heatsinking for typical surge duty.
SMAJ10A-E3/5A 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10A-E3/5A FAQ
1.How can I place an order for SMAJ10A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10A-E3/5A 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 SMAJ10A-E3/5A reliable?
The price and inventory of SMAJ10A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ10A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10A-E3/5A?
SMAJ10A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10A-E3/5A 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 SMAJ10A-E3/5A?
For technical support, including SMAJ10A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10A-E3/5A requirements.
6.How does Aetrix verify that SMAJ10A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ10A-E3/5A 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 SMAJ10A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ10A-E3/5A?
All SMAJ10A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10A-E3/5A, 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 SMAJ10A-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ10A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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