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Vishay General Semiconductor - Diodes Division SMAJ75AHE3/61
- Part No.:
- SMAJ75AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75AHE3/61.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
SMAJ75AHE3/61 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 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 3.3 A peak pulse current, 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 SMAJ75AHE3/61 datasheet, SMAJ75AHE3/61 pinout, SMAJ75AHE3/61 application, or SMAJ75AHE3/61 equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, and stable clamping under repetitive transients are required.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VWM threshold while maintaining low leakage (<1.0 μA at 75 V). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1.0 ns), enabling protection against ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to +150 °C junction temperature. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable clamping onset. |
| VC @ IPPM | 121 V at 3.3 A - Clamped voltage during 10/1000 μs surge; limits stress on downstream components like microcontrollers or gate drivers. |
| PPPM | 400 W - Peak pulse power handling capability; supports high-energy transients without failure when mounted on 5.0 mm × 5.0 mm copper pads. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); validates robustness against inductive switch-off events in motor control circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics including engine control units and body modules. |
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 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to protected line's lower-potential side (e.g., ground or return path) during normal operation. |
| Cathode | Avalanche clamping terminal | Connected to protected line's higher-potential side (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems without derating below 78 V. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Glass passivated junction | Provides stable VBR tolerance and long-term parameter stability across thermal and operational lifetime. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed ECUs and infotainment head units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to 120 V. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤121 V, preventing latch-up or permanent damage. |
Use Scenario: Protecting analog front-end inputs of pressure or temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS installed at connector entry point to absorb ESD (±8 kV contact) and field-induced surges on 24 V signal lines. Use Value: Maintains signal integrity by clamping transients within 1 ns, avoiding false readings or ADC saturation during factory floor operation. |
| Motor Drive Gate Driver Protection | Telecom Power Supply Input Protection |
|
Use Scenario: Safeguarding high-side and low-side MOSFET gate drivers in BLDC inverters from shoot-through-inducing voltage spikes. IC Role / Device Role / Timing Role: Mounted directly across driver supply pins (e.g., VDD-GND) to clamp switching noise and cross-talk coupling. Use Value: Prevents unintended gate turn-on by limiting VGS excursion to <121 V, preserving FET safe operating area during PWM transitions. |
Use Scenario: Guarding primary-side rectifier outputs in telecom AC/DC adapters against lightning-induced surges on -48 V DC distribution lines. IC Role / Device Role / Timing Role: Placed after bulk capacitor to suppress differential-mode surges before secondary-side regulation stages. Use Value: Absorbs 400 W pulses without degradation, ensuring uninterrupted operation during outdoor cabinet lightning events per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/61 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, RoHS-compliant but not automotive qualified. | Approved for consumer and industrial equipment only; excluded from automotive production BOMs requiring AEC validation. | Select when cost sensitivity outweighs automotive qualification requirements and environmental stress testing is not mandated. |
| SMBJ75AHE3/61 | Same electrical specs but SMB (DO-214AA) package - 2.54 mm wider body, 10% higher PPPM (600 W), higher thermal mass. | Better suited for high-reliability industrial power supplies where board space allows larger footprint and higher surge margin is needed. | Choose when PCB layout permits larger package and system-level surge testing exceeds 400 W requirements. |
Compared with SMAJ75AHE3/61, the SMAJ75A-E3/61 lacks automotive qualification but offers identical clamping performance at lower cost, while the SMBJ75AHE3/61 provides higher surge capacity in a larger footprint - making SMAJ75AHE3/61 the optimal balance of AEC compliance, compact size, and 400 W protection for space-constrained automotive modules.
Availability
SMAJ75AHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, motor drive gate drivers, and telecom power supply inputs requiring stable component supply with full traceability and AEC-Q101 assurance.
Supply support for SMAJ75AHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series was developed for high-efficiency, surface-mount transient suppression in automotive and industrial environments where AEC-Q101 compliance, low profile, and repeatable clamping are critical design requirements.
FAQ
What is the clamping voltage of SMAJ75AHE3/61 under a 10/1000 μs surge?
The SMAJ75AHE3/61 has a maximum clamping voltage (VC) of 121 V at 3.3 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Fig. 1 in the Vishay datasheet 88390 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMAJ75AHE3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ75AHE3/61 suitable for automotive applications?
Yes, SMAJ75AHE3/61 is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's datasheet 88390. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and ESD qualification - making it approved for use in engine control units, body electronics, and ADAS power domains. The SMAJ75AHE3/61 meets all requirements for under-hood and cabin-mounted automotive modules.
What is the standoff voltage rating for SMAJ75AHE3/61?
The standoff voltage (VWM) for SMAJ75AHE3/61 is 75 V - the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. This rating ensures compatibility with nominal 12 V and 24 V automotive and industrial power rails while providing sufficient margin above system operating voltage. The SMAJ75AHE3/61 remains non-conductive below this threshold with leakage <1.0 μA.
Does SMAJ75AHE3/61 have a bidirectional variant?
No, SMAJ75AHE3/61 is unidirectional only, indicated by the "A" suffix. Bidirectional variants carry the "CA" suffix (e.g., SMAJ75CAHE3/61) and provide symmetrical clamping in both polarities. The SMAJ75AHE3/61 features a cathode band marking and must be oriented with cathode toward the higher-potential line; using it in reverse polarity will not provide protection.
What package type does SMAJ75AHE3/61 use?
SMAJ75AHE3/61 uses the SMA (DO-214AC) surface-mount package - measuring 4.50 mm × 2.79 mm × 2.29 mm with gull-wing leads. It is optimized for automated placement and reflow soldering, meets MSL Level 1 per J-STD-020, and features matte tin-plated terminations compliant with J-STD-002. The SMAJ75AHE3/61's compact footprint supports high-density PCB layouts in space-constrained modules.
SMAJ75AHE3/61 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- 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)
SMAJ75AHE3/61 FAQ
1.How can I place an order for SMAJ75AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75AHE3/61 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 SMAJ75AHE3/61 reliable?
The price and inventory of SMAJ75AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ75AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75AHE3/61?
SMAJ75AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75AHE3/61 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 SMAJ75AHE3/61?
For technical support, including SMAJ75AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75AHE3/61 requirements.
6.How does Aetrix verify that SMAJ75AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ75AHE3/61 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 SMAJ75AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ75AHE3/61?
All SMAJ75AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75AHE3/61, 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 SMAJ75AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ75AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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