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Vishay General Semiconductor - Diodes Division SMAJ10AHE3/5A
- Part No.:
- SMAJ10AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10AHE3/5A.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,030
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Product details
Overview
SMAJ10AHE3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 23.5 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ10AHE3/5A datasheet, SMAJ10AHE3/5A pinout, SMAJ10AHE3/5A application, or SMAJ10AHE3/5A equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly and high-reliability board-level ESD/surge protection.
Technical Context
The SMAJ10AHE3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 11.1–12.3 V), thereby shunting transient energy to ground while maintaining low clamping voltage (VC = 17.0 V). Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, enabling operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C, and supports 40 A IFSM (8.3 ms half-sine surge) - critical for handling inductive switch-off spikes in DC power distribution networks.
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 clamping onset. |
| VBR (Breakdown Voltage) | 11.1–12.3 V at IT = 1 mA - Tight tolerance ensures predictable turn-on during transients without false triggering. |
| VC (Clamping Voltage) | 17.0 V at IPPM = 23.5 A - Limits downstream voltage stress during 400 W 10/1000 μs surge events. |
| PPPM (Peak Pulse Power) | 400 W - Sustains high-energy transients common in automotive load-dump and inductive switching scenarios. |
| ID (Reverse Leakage) | 1.0 μA at VWM - Minimal standby current preserves efficiency in always-on circuits like automotive sensors. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line (e.g., VBUS or signal trace); conducts during forward-biased faults or ESD events. |
| Cathode | Reverse-biased clamping terminal | Connected to ground reference; initiates avalanche conduction when reverse voltage exceeds VBR, diverting surge current. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles high-energy surges from inductive loads and lightning-induced coupling without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including engine control units, body modules, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage exposure to downstream ICs - critical for protecting 12 V-rated microcontrollers and transceivers. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow processes without moisture-related popcorning or delamination risks. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity and contamination in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VBAT and GND, absorbing >400 W surges within nanoseconds. Use Value: Prevents latch-up or permanent damage to CAN transceivers and MCU power supplies during vehicle ignition cycles. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line (e.g., 0–5 V output), grounded via shortest possible path. Use Value: Maintains signal integrity with <1.0 μA leakage at 10 V, avoiding DC offset errors in precision measurement circuits. |
| DC-DC Converter Input Protection | Consumer USB Power Delivery Line |
|
Use Scenario: Safeguarding buck converter inputs from back-EMF spikes generated by relay or solenoid switching in HVAC systems. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of input capacitor and controller IC. Use Value: Clamps transients to ≤17.0 V, ensuring input voltage stays within absolute maximum ratings of 24 V-rated controllers. |
Use Scenario: Adding secondary-level surge immunity to USB-C VBUS lines in portable docking stations and monitors. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse, rated for 10 V nominal bus voltage. Use Value: Survives repeated ±8 kV contact ESD (IEC 61000-4-2) while maintaining <1 μA leakage to avoid standby current drain. |
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-E3/5A | No AEC-Q101 qualification; commercial-grade only; same electrical specs and package. | Suitable for non-automotive industrial or consumer designs where automotive reliability certification is not required. | Select when cost sensitivity outweighs need for automotive qualification and lifecycle assurance. |
| SMBJ10AHE3/5A | Same VWM/VBR/VC but higher PPPM (600 W); larger SMB (DO-214AA) package with different pad layout. | Used where higher surge margin is needed and PCB space allows larger footprint; not drop-in compatible. | Choose when system-level surge testing exceeds 400 W requirements and layout revision is feasible. |
Compared with SMAJ10AHE3/5A, the SMAJ10A-E3/5A offers identical protection performance at lower qualification cost, while SMBJ10AHE3/5A provides 50 % higher surge capacity in a physically incompatible package - requiring layout change but delivering extended robustness for mission-critical power inputs.
Availability
SMAJ10AHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC-DC power supply designs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ10AHE3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was developed for high-reliability board-level transient suppression in automotive, industrial, and telecom infrastructure - prioritizing tight VBR tolerance, low clamping voltage, and AEC-Q101 validation across voltage grades.
FAQ
What is the clamping voltage of SMAJ10AHE3/5A at its rated peak pulse current?
The SMAJ10AHE3/5A has a maximum clamping voltage (VC) of 17.0 V at its rated peak pulse current (IPPM) of 23.5 A, measured using the standardized 10/1000 μs double-exponential surge waveform. This value ensures downstream components see no more than 17.0 V during a 400 W transient event, making SMAJ10AHE3/5A suitable for protecting 12 V logic and power circuits without overstressing their absolute maximum ratings.
Is SMAJ10AHE3/5A suitable for automotive applications?
Yes, SMAJ10AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias, and ESD. It is deployed in engine control units, body control modules, and ADAS sensor interfaces where sustained operation from −40 °C to +150 °C and immunity to load-dump pulses are mandatory - all validated for SMAJ10AHE3/5A.
How does the SMAJ10AHE3/5A differ from the SMAJ10CA variant?
The SMAJ10AHE3/5A is unidirectional with cathode marking and conducts only in reverse breakdown, whereas SMAJ10CA is bidirectional and symmetrical - clamping in both polarities. SMAJ10AHE3/5A has VWM = 10 V and VBR = 11.1–12.3 V (unidirectional), while SMAJ10CA shares the same VWM but exhibits matched breakdown in both directions. Use SMAJ10AHE3/5A for DC power rail protection; choose SMAJ10CA only for AC-coupled or floating signal lines.
What is the thermal resistance of SMAJ10AHE3/5A, and how does it affect PCB layout?
SMAJ10AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain TJ ≤ 150 °C under 400 W surge conditions, PCB layout must include minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in Vishay's datasheet - to achieve the rated PPPM. Smaller pads cause thermal derating and potential failure during repetitive surges.
Does SMAJ10AHE3/5A meet lead-free soldering standards?
Yes, SMAJ10AHE3/5A uses matte tin-plated leads and is rated for lead-free reflow with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. It is fully RoHS-compliant and qualified for standard SMT assembly processes without preconditioning - verified per JEDEC test conditions and documented in Vishay's official datasheet revision 09-Jan-2024.
SMAJ10AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ10AHE3/5A FAQ
1.How can I place an order for SMAJ10AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10AHE3/5A 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 SMAJ10AHE3/5A reliable?
The price and inventory of SMAJ10AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ10AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10AHE3/5A?
SMAJ10AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10AHE3/5A 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 SMAJ10AHE3/5A?
For technical support, including SMAJ10AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10AHE3/5A requirements.
6.How does Aetrix verify that SMAJ10AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ10AHE3/5A 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 SMAJ10AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ10AHE3/5A?
All SMAJ10AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10AHE3/5A, 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 SMAJ10AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ10AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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