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Vishay General Semiconductor - Diodes Division SMAJ7.5HE3/61
- Part No.:
- SMAJ7.5HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5HE3/61.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,513
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Product details
Overview
SMAJ7.5HE3/61 from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 7.5 V stand-off voltage (VWM), 14.3 V clamping voltage (VC) at 28.0 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C junction temperature - deployed on power rails and signal lines of engine control units and sensor interfaces.
For engineers reviewing the SMAJ7.5HE3/61 datasheet, SMAJ7.5HE3/61 pinout, SMAJ7.5HE3/61 application, or SMAJ7.5HE3/61 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal resistance values (RθJA = 120 °C/W), and RoHS-compliant high-reliability packaging details - all specific to the HE3 automotive-grade variant.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its breakdown voltage (VBR) is specified at 8.33–10.2 V with 1.0 mA test current, ensuring robust turn-on margin above 7.5 V stand-off while maintaining low leakage (<1.0 µA at VWM).
It delivers 400 W peak pulse power per 10/1000 µs waveform when mounted on 0.2 × 0.2" copper pads, with clamping limited to 14.3 V at 28.0 A - enabling effective protection of 5 V and 3.3 V logic interfaces without overstressing downstream ICs. Thermal design is supported by RθJL = 30 °C/W and MSL Level 1 rating (260 °C reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction; ensures compatibility with 5 V supply rails and 3.3 V I/O systems. |
| VC @ IPPM | 14.3 V - Clamped voltage during 28.0 A 10/1000 µs surge; limits stress on protected ICs to safe levels below absolute maximum ratings. |
| IPPM | 28.0 A - Peak surge current capability under standard waveform; sufficient for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); enables single-device protection for moderate-energy surges without derating. |
| TJ Range | −55 °C to +150 °C - Extended junction temperature range certified per AEC-Q101; supports under-hood and powertrain applications. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained surge duty cycles. |
| Leakage @ VWM | <1.0 µA - Ultra-low reverse leakage at rated stand-off; prevents battery drain in always-on automotive modules. |
Pinout & Package
DO-214AC (SMA) surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD22-B102 solderability standards. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during transient clamp event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., CAN_H, LIN, 5 V rail); absorbs positive-going transients toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; supports PPAP documentation. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; resists humidity-induced parameter drift in harsh environments. |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak; eliminates moisture sensitivity concerns during assembly. |
| JESD201 Class 2 whisker resistance | HE3 suffix confirms enhanced mitigation against tin whisker growth - critical for long-life automotive modules. |
| 400 W 10/1000 µs pulse rating | Provides single-device protection against ISO 7637-2 Pulse 5a (load dump) up to 12 V system level without external series impedance. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 5 V microcontroller power inputs in engine control units exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive surges before they reach LDO regulators or MCU VDD pins. Use Value: Limits voltage excursion to ≤14.3 V during 28 A surges, preventing latch-up or permanent damage to 5 V-rated silicon. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter outputs) in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected across output terminals to shunt inductive kickback from solenoid switching or cable ESD events. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amps or ADC drivers exceed absolute maximum ratings. |
| Automotive LIN Bus Protection | Consumer Power Adapter Input Protection |
|
Use Scenario: Shielding LIN transceiver pins (LIN_H) against battery feed coupling and ESD in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to battery ground, absorbing positive transients on the LIN bus line. Use Value: 7.5 V VWM allows normal LIN signaling (dominant <1.5 V, recessive ≈12 V) while clamping >14 V faults. |
Use Scenario: Front-end surge suppression in AC/DC adapters for smart home devices subjected to mains-borne transients. IC Role / Device Role / Timing Role: TVS placed after bridge rectifier to protect primary-side controller ICs from differential-mode surges. Use Value: 400 W rating handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation over 10,000+ events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5AHE3/61 | Lower VBR range (8.33–9.21 V) and reduced VC (12.9 V at 31.0 A); same AEC-Q101 qualification and HE3 packaging. | Better suited for tighter-clamp designs where protected ICs have lower absolute maximum voltage ratings (e.g., 12 V tolerant I/O). | Select SMAJ7.5AHE3/61 when clamping voltage margin is critical and surge current remains within 31 A limit. |
| SMBJ7.5HE3/61 | Same VWM/VBR/VC specs but in larger DO-214AA (SMB) package; higher PPPM (600 W) and IPPM (38.9 A). | Preferred for higher-energy transients (e.g., ISO 7637-2 Pulse 5b) or where board space permits larger footprint. | Choose SMBJ7.5HE3/61 when surge energy exceeds 400 W capability or thermal dissipation requires lower RθJA. |
Compared with SMAJ7.5HE3/61, the SMAJ7.5AHE3/61 offers tighter clamping at lower surge current, while SMBJ7.5HE3/61 trades footprint for higher energy handling - neither is pin-compatible due to differing package outlines (DO-214AC vs. DO-214AA), requiring layout revision.
Availability
SMAJ7.5HE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, LIN bus interfaces, and consumer power adapter designs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ7.5HE3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The SMAJ family is engineered for high-reliability transient suppression in automotive and industrial environments, with HE3 variants specifically developed to meet AEC-Q101 stress testing and long-term field performance requirements.
FAQ
What is the key difference between SMAJ7.5HE3/61 and standard SMAJ7.5E3/61?
The SMAJ7.5HE3/61 carries the HE3 suffix indicating high-reliability, AEC-Q101-qualified construction with JESD201 Class 2 whisker resistance and extended temperature validation. In contrast, the E3-suffix version is commercial-grade only, lacking automotive qualification and long-term reliability testing - SMAJ7.5HE3/61 is required for under-hood and safety-critical applications.
Does SMAJ7.5HE3/61 support bidirectional transient suppression?
No, SMAJ7.5HE3/61 is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical characteristics for forward-biased clamping only. For bidirectional protection, Vishay offers SMAJ7.5CA variants - SMAJ7.5HE3/61 must be used with correct polarity alignment relative to the protected line's DC bias.
What is the maximum clamping voltage of SMAJ7.5HE3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ7.5HE3/61 is 14.3 V at 28.0 A peak pulse current with a 10/1000 µs waveform, measured per Fig. 1 and Fig. 3 of Vishay document 88390. This value is guaranteed across the full operating temperature range and forms the basis for protected IC voltage margin analysis.
Is SMAJ7.5HE3/61 compatible with lead-free reflow processes?
Yes, SMAJ7.5HE3/61 is qualified for lead-free reflow with a maximum peak temperature of 260 °C per J-STD-020 MSL Level 1, and its matte tin-plated leads comply with J-STD-002 solderability requirements - no pre-baking is needed prior to standard SMT assembly.
How does the thermal resistance of SMAJ7.5HE3/61 impact PCB layout?
SMAJ7.5HE3/61 has RθJA = 120 °C/W and RθJL = 30 °C/W, meaning effective heat dissipation relies heavily on copper pad area and via count. To maintain junction temperature below 150 °C during repetitive surges, Vishay recommends minimum 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal - undersized pads will cause premature thermal failure of SMAJ7.5HE3/61.
SMAJ7.5HE3/61 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SMAJ7.5HE3/61 FAQ
1.How can I place an order for SMAJ7.5HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5HE3/61 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 SMAJ7.5HE3/61 reliable?
The price and inventory of SMAJ7.5HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5HE3/61?
SMAJ7.5HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5HE3/61 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 SMAJ7.5HE3/61?
For technical support, including SMAJ7.5HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5HE3/61 requirements.
6.How does Aetrix verify that SMAJ7.5HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5HE3/61 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 SMAJ7.5HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5HE3/61?
All SMAJ7.5HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5HE3/61, 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 SMAJ7.5HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.5HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5HE3/61 Tags
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