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Vishay General Semiconductor - Diodes Division SMAJ15AHE3/61
- Part No.:
- SMAJ15AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15AHE3/61.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,451
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Product details
Overview
SMAJ15AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA test current, and clamps transients to ≤24.4 V at 16.4 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for safeguarding MOSFET gates, microcontroller I/O lines, and automotive sensor interfaces.
For engineers reviewing the SMAJ15AHE3/61 datasheet, SMAJ15AHE3/61 pinout, SMAJ15AHE3/61 application, or SMAJ15AHE3/61 equivalent, key selection criteria include its AEC-Q101 qualification, 400 W peak pulse power rating (10/1000 μs), low clamping ratio (VC/VBR ≈ 1.46), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction for stable avalanche behavior and fast response (<1 ns). Its thermal resistance (RθJA = 120 °C/W) and maximum junction temperature (150 °C) support reliable operation in automotive under-hood and industrial control environments.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and delivers 3.3 W steady-state power dissipation at 50 °C ambient - enabling direct integration into compact, high-density PCB designs without external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - precise avalanche onset range ensuring predictable turn-on during transients |
| VC (Clamping Voltage) | ≤24.4 V at IPPM = 16.4 A - limits downstream voltage stress to protect 3.3 V/5 V logic and analog front-ends |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - sustains high-energy surges from inductive switching or ESD without failure |
| ID (Max Reverse Leakage) | 1.0 μA at VWM - negligible standby current, critical for battery-powered sensor nodes |
| TJ max | 150 °C - supports operation in automotive engine control units and industrial motor drives |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with molded UL 94 V-0 compound; cathode indicated by band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to protected circuit ground or low-side return path; enables clamping when cathode is biased above anode |
| Cathode | Avalanche conduction terminal (marked with band) | Connected to protected line (e.g., CAN_H, USB_VBUS, MCU_IO); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Withstands repetitive lightning-induced surges in telecom line cards and industrial PLC I/O modules |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including body control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorning or delamination |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy between signal line and chassis ground. Use Value: Limits voltage to ≤24.4 V during 100 V/50 ms load dump events, preserving sensor accuracy and MCU communication integrity. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-clamp protector placed upstream of optocoupler input stage. Use Value: Absorbs 400 W surges without degradation, maintaining >10⁶ surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Consumer USB Port Protection | Power Supply Input Stage |
Use Scenario: Shielding USB 2.0 data lines and VBUS pins in portable medical devices from ESD and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS rail and D+/D− lines. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within <1 ns, preventing data corruption and port controller latch-up. |
Use Scenario: Secondary-side overvoltage suppression on DC-DC converter outputs feeding FPGA core rails. IC Role / Device Role / Timing Role: Fast-response shunt limiter placed between output and ground. Use Value: Activates at 16.7 V to clamp fault conditions (e.g., feedback loop open), holding output ≤24.4 V to prevent IC destruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/61 | Commercial-grade (non-AEC-Q101), identical electrical specs and package | Lacks automotive qualification; suitable for consumer/industrial use only | Select when AEC-Q101 is not required and cost sensitivity is higher |
| SMBJ15AHE3/61 | Same VWM/VBR/VC but in larger SMB (DO-214AA) package; 600 W PPPM rating | Higher power handling but 30% larger footprint; requires PCB layout change | Choose when system-level surge requirements exceed 400 W or thermal margin is constrained |
Compared with SMAJ15AHE3/61, the E3/61 variant offers identical protection performance without automotive qualification, while SMBJ15AHE3/61 provides higher surge capacity at the cost of board space - making SMAJ15AHE3/61 optimal for space-constrained AEC-Q101-compliant designs.
Availability
SMAJ15AHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and USB power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15AHE3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets high-reliability transient suppression in automotive, industrial, and computing systems - engineered for fast clamping, low leakage, and robust surge endurance in harsh environments.
FAQ
What is the clamping voltage of SMAJ15AHE3/61 at its rated peak pulse current?
The SMAJ15AHE3/61 clamps to a maximum of 24.4 V at its specified peak pulse current (IPPM) of 16.4 A under the standard 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components experience controlled voltage stress during transient events, directly supporting design margins for 3.3 V and 5 V logic families.
Is SMAJ15AHE3/61 suitable for automotive applications?
Yes, SMAJ15AHE3/61 is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3". It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under thermal and electrical stress is mandatory.
What does the "HE3" suffix indicate in SMAJ15AHE3/61?
The "HE3" suffix in SMAJ15AHE3/61 denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability requirements. It distinguishes this automotive-grade variant from commercial "E3" or halogen-free "HM3" versions, confirming compliance with automotive reliability and environmental standards.
How does SMAJ15AHE3/61 differ from bidirectional SMAJ15CA variants?
SMAJ15AHE3/61 is unidirectional with cathode marking and forward conduction capability, whereas SMAJ15CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The unidirectional version offers lower forward voltage drop (VF = 3.5 V at 25 A), making SMAJ15AHE3/61 preferable for DC-biased lines like power rails or single-ended signal paths.
What is the thermal resistance and maximum junction temperature of SMAJ15AHE3/61?
SMAJ15AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and a maximum junction temperature (TJ max) of 150 °C. These values are measured on standard 0.2" × 0.2" copper pads and enable operation in ambient temperatures up to 125 °C when power dissipation remains within derated limits - critical for under-hood automotive and enclosed industrial enclosures.
SMAJ15AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SMAJ15AHE3/61 FAQ
1.How can I place an order for SMAJ15AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15AHE3/61 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 SMAJ15AHE3/61 reliable?
The price and inventory of SMAJ15AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ15AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15AHE3/61?
SMAJ15AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15AHE3/61 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 SMAJ15AHE3/61?
For technical support, including SMAJ15AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15AHE3/61 requirements.
6.How does Aetrix verify that SMAJ15AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ15AHE3/61 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 SMAJ15AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ15AHE3/61?
All SMAJ15AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15AHE3/61, 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 SMAJ15AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ15AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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