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Vishay General Semiconductor - Diodes Division SMAJ5.0AHE3/5A
- Part No.:
- SMAJ5.0AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0AHE3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,756
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Product details
Overview
SMAJ5.0AHE3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of 5.0 V DC power rails and signal lines. It features a 6.40 V minimum breakdown voltage (VBR), 9.2 V maximum clamping voltage (VC) at 43.5 A peak pulse current, and 400 W peak pulse power rating with a 10/1000 μs waveform - deployed in automotive ECUs, USB power inputs, and industrial sensor interfaces.
For engineers reviewing the SMAJ5.0AHE3/5A datasheet, SMAJ5.0AHE3/5A pinout, SMAJ5.0AHE3/5A application, or SMAJ5.0AHE3/5A equivalent, key selection criteria include its AEC-Q101 qualification, SMA (DO-214AC) package compatibility with automated SMT assembly, low 800 μA reverse leakage at 5.0 V stand-off, and verified clamping performance under repetitive surge conditions per IEC 61000-4-5.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its thermal design relies on RθJA = 120 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C.
The SMAJ5.0AHE3/5A meets UL 497B recognition (QVGQ2, E136766) and is rated for 40 A non-repetitive forward surge (8.3 ms half-sine), with derating above 25 °C per Figure 2. It is specified for single-pulse transients only - not intended for continuous AC line protection or sustained overvoltage regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 5.0 V - Maximum continuous reverse voltage before significant leakage; defines operating margin for 5 V rail protection. |
| Breakdown Voltage (VBR) | 6.40–7.07 V at 10 mA - Confirmed minimum/maximum threshold where avalanche conduction begins reliably. |
| Clamping Voltage (VC) | 9.2 V at 43.5 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; enables safe margin for 5 V ICs. |
| Peak Pulse Power (PPPM) | 400 W - Sustained energy absorption capability under standardized transient waveform; validated at TA = 25 °C. |
| Reverse Leakage (ID) | 800 μA max at VWM = 5.0 V - Low quiescent current ensures minimal impact on standby power in battery-powered systems. |
| Operating Temperature | −55 °C to +150 °C - Full industrial and automotive ambient range support without derating loss of clamping integrity. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A110. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., VIN); conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 5 V supply lines without failure. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood and infotainment applications requiring zero defect rates and extended lifetime reliability. |
| Low profile SMA (DO-214AC) package | 0.208" × 0.157" footprint supports high-density PCB layouts and compatibility with standard SMT reflow profiles (260 °C peak). |
| Glass passivated junction | Ensures stable VBR tolerance (±5 % typical), low leakage drift over temperature, and immunity to humidity-induced degradation. |
| UL 497B recognized (E136766) | Meets safety agency requirements for telecom and industrial equipment without need for additional external certification testing. |
Applications
| Automotive Body Control Module (BCM) | USB Type-A Power Input Protection |
|---|---|
Use Scenario: Protecting 5 V microcontroller supply rails from load-dump and inductive switching transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 5 V input and LDO regulator input. Use Value: Limits transient voltage to ≤9.2 V during 40 A surge events, preventing latch-up or gate oxide damage in downstream logic ICs. |
Use Scenario: Safeguarding USB host port VBUS line against ESD and hot-plug overshoot in industrial docking stations. IC Role / Device Role / Timing Role: Primary front-end surge suppressor located immediately after USB connector, before polyfuse and power switch. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within <1 ns while maintaining <800 μA leakage at 5 V - no impact on USB suspend current. |
| Industrial Sensor Signal Conditioning | Smart Meter Power Supply Input |
Use Scenario: Shielding analog front-end inputs of 5 V ADCs from field-induced transients in factory-floor pressure sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across differential signal pair (e.g., RS-485 bias network) referenced to local 5 V rail. Use Value: Provides 400 W surge handling without distorting 100 kHz sensor bandwidth due to minimal junction capacitance (<100 pF at 0 V). |
Use Scenario: Securing 5 V auxiliary supply derived from mains-connected SMPS in utility smart meters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device on secondary-side 5 V output, upstream of isolated DC-DC converter. Use Value: Absorbs 10/1000 μs surges up to 43.5 A while maintaining VC ≤9.2 V - preserves isolation barrier integrity and prevents MCU brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-E3/5A | Same electrical specs and AEC-Q101 qualification; differs only in RoHS-compliant commercial-grade marking (E3 vs HE3) and absence of automotive traceability documentation. | Approved for industrial/commercial use only; not certified for automotive production programs requiring PPAP or lot traceability. | Select when cost sensitivity outweighs automotive qualification requirements and full lifecycle documentation is not mandated. |
| SMBJ5.0AHE3/5A | Same VWM, VBR, and VC, but SMB (DO-214AA) package offers 600 W PPPM rating and higher IPPM (64.5 A), with larger 0.265" × 0.175" footprint. | Better suited for higher-energy surges (e.g., 10/1000 μs >50 A) but requires PCB layout change and increased board area. | Choose when surge threat level exceeds 400 W or when system-level testing reveals marginal clamping margin with SMAJ5.0AHE3/5A. |
Compared with SMAJ5.0A-E3/5A, the SMAJ5.0AHE3/5A adds automotive-grade traceability and qualification evidence, while compared with SMBJ5.0AHE3/5A, it trades peak power headroom for space-constrained designs where 400 W suffices and 25 % smaller footprint is critical.
Availability
SMAJ5.0AHE3/5A is available at Aetrix Electronics and suitable for automotive body electronics, USB power delivery systems, industrial sensor nodes, and smart metering platforms requiring stable component supply with AEC-Q101 assurance and long-term manufacturability.
Supply support for SMAJ5.0AHE3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was developed specifically for surface-mount transient suppression in automotive, industrial, and telecom infrastructure - prioritizing fast response, repeatable clamping, and robust thermal performance in compact packages.
FAQ
What is the maximum clamping voltage of the SMAJ5.0AHE3/5A under a 10/1000 μs surge?
The SMAJ5.0AHE3/5A has a maximum clamping voltage (VC) of 9.2 V when subjected to its rated peak pulse current of 43.5 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C on recommended 5.0 mm × 5.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 5 V logic interfaces.
Is the SMAJ5.0AHE3/5A suitable for bidirectional signal line protection?
No, the SMAJ5.0AHE3/5A is a unidirectional TVS diode, identified by its cathode band and specified only for single-polarity clamping. For bidirectional protection (e.g., RS-485, CAN bus), the SMAJ5.0CA variant must be used instead. Using SMAJ5.0AHE3/5A on AC-coupled or symmetrical signal lines risks forward conduction during negative excursions and inadequate protection.
Does the HE3 suffix on SMAJ5.0AHE3/5A guarantee AEC-Q101 qualification?
Yes - the HE3 suffix explicitly denotes that the SMAJ5.0AHE3/5A is manufactured and tested to AEC-Q101 standards for stress testing, reliability, and automotive-grade traceability. This includes qualification for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), making it appropriate for production automotive applications requiring PPAP documentation.
What is the reverse leakage current of SMAJ5.0AHE3/5A at its 5.0 V stand-off voltage?
The SMAJ5.0AHE3/5A exhibits a maximum reverse leakage current (ID) of 800 μA at VWM = 5.0 V and TA = 25 °C. This low leakage ensures minimal impact on power budget in always-on systems such as automotive body controllers or battery-backed IoT sensors, supporting compliance with strict standby current specifications.
Can SMAJ5.0AHE3/5A be used in place of SMAJ5.0A-E3/5A without design changes?
Yes - SMAJ5.0AHE3/5A is a direct drop-in replacement for SMAJ5.0A-E3/5A in terms of pinout, package (SMA/DO-214AC), and all electrical parameters. The only differences are enhanced automotive qualification (AEC-Q101), extended traceability, and tighter process controls; no PCB layout, schematic, or firmware modifications are required when upgrading from E3 to HE3.
SMAJ5.0AHE3/5A 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
SMAJ5.0AHE3/5A FAQ
1.How can I place an order for SMAJ5.0AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0AHE3/5A 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 SMAJ5.0AHE3/5A reliable?
The price and inventory of SMAJ5.0AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0AHE3/5A?
SMAJ5.0AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0AHE3/5A 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 SMAJ5.0AHE3/5A?
For technical support, including SMAJ5.0AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0AHE3/5A requirements.
6.How does Aetrix verify that SMAJ5.0AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0AHE3/5A 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 SMAJ5.0AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0AHE3/5A?
All SMAJ5.0AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0AHE3/5A, 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 SMAJ5.0AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0AHE3/5A Tags
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