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Vishay General Semiconductor - Diodes Division SMAJ75-E3/5A
- Part No.:
- SMAJ75-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75-E3/5A.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,291
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Product details
Overview
SMAJ75-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 75 V stand-off voltage (VWM), 134 V maximum clamping voltage (VC) at 3.0 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ75-E3/5A datasheet, SMAJ75-E3/5A pinout, SMAJ75-E3/5A application, or SMAJ75-E3/5A equivalent, key selection criteria include its 75 V reverse stand-off rating, low 1.0 µA max reverse leakage at VWM, 83.3–102 V breakdown range, 150 °C junction temperature limit, and RoHS-compliant matte tin-plated leads compatible with J-STD-002 solderability standards.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device triggered by transient overvoltage events. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable clamping performance under repetitive 10/1000 µs surges at 0.01% duty cycle.
The device is rated for 40 A peak forward surge current (IFSM) in 8.3 ms half-sine wave, supports -55 °C to +150 °C operating junction temperature range, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 83.3 V / 102 V at 1.0 mA test current - guaranteed breakdown onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 134 V at 3.0 A - Clamped voltage seen by protected circuit during 400 W surge; limits stress on downstream components. |
| IPPM | 3.0 A - Peak pulse current capability with 10/1000 µs waveform; determines energy absorption capacity (400 W). |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at stand-off voltage; prevents standby power loss and signal integrity degradation. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in high-ambient industrial environments. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient; informs PCB copper pad design (0.2" × 0.2") for thermal management. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by band marking on body. Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during positive transients when cathode is biased higher. |
| Cathode | Clamping reference terminal | Banded end; connected to higher-potential rail (e.g., VCC or signal line); defines clamping threshold relative to ground or return path. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without derating below 78 V. |
| Glass-passivated junction | Ensures stable electrical parameters across temperature and long-term reliability under repeated surge stress. |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirement; supports standard lead-free SMT assembly processes without moisture-induced failure. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU Directive 2002/95/EC; matte tin plating passes JESD201 Class 1A whisker testing for high-reliability deployment. |
| Low 1.0 µA reverse leakage at VWM | Minimizes quiescent current draw in battery-powered or low-power sensor interfaces without compromising protection margin. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay and solenoid switching. IC Role / Device Role: Unidirectional clamping TVS placed between MCU GPIO and external load interface. Use Value: Limits transient voltage to ≤134 V during 3 A surge, preventing latch-up or permanent damage to 5 V/3.3 V logic inputs. |
Use Scenario: Safeguarding LIN bus transceivers and sensor supply rails from load dump and jump-start events. IC Role / Device Role: Standoff-rated TVS on 12 V power input to BCUs, absorbing up to 400 W pulses without degradation. Use Value: Maintains 75 V stand-off while clamping to 134 V - compatible with automotive 12 V system tolerances and ISO 7637-2 Pulse 5a requirements. |
| Telecom Power Rectifier Outputs | Consumer Appliance Mainboard DC Rails |
|
Use Scenario: Secondary-side surge suppression on +48 V telecom power distribution networks exposed to lightning-induced surges. IC Role / Device Role: Parallel-connected TVS on rectified output prior to DC-DC converters. Use Value: Withstands 400 W peak pulse and 40 A non-repetitive forward surge, ensuring continuity after multiple 10/1000 µs transients. |
Use Scenario: Input protection for SMPS controllers and communication ICs on white-goods mainboards subjected to ESD and EFT. IC Role / Device Role: Low-leakage (≤1 µA) clamping device on 5 V/12 V internal rails feeding microcontrollers and displays. Use Value: Prevents false resets and data corruption by limiting transient overshoot to <134 V while adding negligible standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/5A | Lower VBR range (83.3–92.1 V), tighter 12.9 V clamping at 3.3 A; 10% lower VC. | Better suited for systems requiring tighter clamping margin near 75 V rail; slightly reduced surge current handling (3.3 A vs. 3.0 A). | Select SMAJ75A-E3/5A when lower clamping voltage is prioritized over absolute peak power rating. |
| P6SMB75A-E3/52 | Same VWM (75 V) but SMB package (DO-214AA); 600 W peak power; higher IPPM (6.1 A); larger footprint. | Higher power handling suits more severe surge environments; incompatible pinout and thermal profile due to larger case. | Choose P6SMB75A-E3/52 only if board layout allows SMB footprint and >400 W surge margin is required. |
Compared with SMAJ75-E3/5A, SMAJ75A-E3/5A offers improved clamping precision at the cost of slightly reduced surge current headroom, while P6SMB75A-E3/52 provides higher power capacity in a physically incompatible package - making SMAJ75-E3/5A optimal for space-constrained 400 W protection with DO-214AC compatibility.
Availability
SMAJ75-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power rectifier outputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ75-E3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in compact surface-mount formats, targeting cost-sensitive yet robust protection needs across automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMAJ75-E3/5A under maximum rated surge?
The SMAJ75-E3/5A clamps to a maximum of 134 V when subjected to its rated 3.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during transient events. The SMAJ75-E3/5A maintains this clamping performance consistently across its operational temperature range.
Is SMAJ75-E3/5A suitable for automotive applications?
SMAJ75-E3/5A is rated for commercial-grade operation and meets RoHS and J-STD-020 MSL Level 1 standards, but it is not AEC-Q101 qualified. For automotive applications requiring qualification, the HE3-suffix variant (e.g., SMAJ75HE3/5A) must be used. The SMAJ75-E3/5A remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated, such as infotainment power rails or accessory modules.
How does the E3 suffix affect SMAJ75-E3/5A's reliability and processing?
"E3" denotes Vishay's RoHS-compliant, commercial-grade construction with matte tin-plated leads that pass JESD201 Class 1A whisker testing. This ensures solder joint integrity during reflow and long-term storage. The SMAJ75-E3/5A supports standard lead-free SMT processes including 260 °C peak reflow (40 s) and is compatible with J-STD-002 solderability requirements - critical for consistent manufacturing yield.
What is the thermal resistance of SMAJ75-E3/5A, and how does it impact PCB layout?
The SMAJ75-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained surge conditions or elevated ambient, designers must allocate adequate copper area and consider airflow. Exceeding TJ = 150 °C risks parametric shift or failure - the SMAJ75-E3/5A's thermal specification directly governs minimum pad sizing.
Can SMAJ75-E3/5A be used in bidirectional configurations?
No - SMAJ75-E3/5A is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMAJ75CA), which features symmetrical breakdown in both polarities. Using SMAJ75-E3/5A in reverse-biased AC signal paths will result in unintended conduction and potential failure. Always verify polarity alignment during placement; the SMAJ75-E3/5A functions only with cathode tied to the higher-potential node.
SMAJ75-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ75-E3/5A FAQ
1.How can I place an order for SMAJ75-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75-E3/5A 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 SMAJ75-E3/5A reliable?
The price and inventory of SMAJ75-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ75-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75-E3/5A?
SMAJ75-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75-E3/5A 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 SMAJ75-E3/5A?
For technical support, including SMAJ75-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75-E3/5A requirements.
6.How does Aetrix verify that SMAJ75-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ75-E3/5A 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 SMAJ75-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ75-E3/5A?
All SMAJ75-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75-E3/5A, 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 SMAJ75-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ75-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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