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Vishay General Semiconductor - Diodes Division SMAJ75-E3/61
- Part No.:
- SMAJ75-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75-E3/61.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,942
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Product details
Overview
SMAJ75-E3/61 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 75 V standoff voltage (VWM), 134 V maximum clamping voltage (VC) at 3.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMAJ75-E3/61 datasheet, SMAJ75-E3/61 pinout, SMAJ75-E3/61 application, or SMAJ75-E3/61 equivalent, key selection criteria include its 75 V working voltage, 134 V clamping performance under 3.0 A surge, DO-214AC thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown above its 75 V standoff threshold. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the DO-214AC package supports automated placement and meets MSL Level 1 reflow requirements (260 °C peak).
The device delivers 400 W peak pulse power (derated to 300 W above 78 V) with 10/1000 µs waveform compliance per ANSI/IEEE C62.35, and exhibits fast response time (<1.0 ps) due to low junction capacitance - critical for safeguarding high-speed data lines and switching power stage components against ESD and inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48–60 V DC systems. |
| VC @ IPPM | 134 V - Clamped voltage at 3.0 A peak pulse current; determines protected circuit's maximum transient overvoltage exposure. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 µs waveform; enables robust protection against lightning-induced surges and load dump events. |
| IPPM | 3.0 A - Peak pulse current capability at rated clamping voltage; correlates directly with surge energy absorption (E ≈ VC × IPPM × tp). |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on 0.2 × 0.2" copper pads; informs derating requirements for sustained surge duty cycles. |
| ID @ VWM | <1.0 µA - Reverse leakage at 75 V; ensures minimal standby power loss and avoids false triggering in high-impedance sensing circuits. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking on one end. Meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 reflow profile (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to lower-potential side of protected line; enables clamping only during reverse overvoltage events. |
| Cathode | Avalanche breakdown terminal (marked with band) | Connected to higher-potential side (e.g., VIN or signal line); initiates clamping when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable, repeatable avalanche breakdown with low parameter drift across temperature and lifetime. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3/4 surge immunity testing without degradation in standard PCB layouts. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V/5 V logic interfaces. |
| Matte tin-plated leads (J-STD-002 compliant) | Guarantees reliable solder wetting and intermetallic formation in lead-free reflow processes up to 260 °C. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU Directive 2002/95/EC and JESD201 Class 1A whisker resistance for long-term reliability in non-automotive applications. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp transients exceeding 75 V while maintaining normal operation below that threshold. Use Value: Limits transient overvoltage to ≤134 V, preventing damage to upstream DC-DC converters and microcontrollers rated for 100 V absolute maximum. |
Use Scenario: Safeguarding LIN bus and sensor analog inputs (e.g., temperature, pressure) in BCMs exposed to battery voltage spikes and ESD events. IC Role / Device Role / Timing Role: Standoff-rated clamping device on signal lines referenced to chassis ground, leveraging low leakage (<1 µA) to avoid loading high-impedance sensor outputs. Use Value: Maintains signal integrity during 8 kV contact ESD (IEC 61000-4-2) by clamping within 1 ns and dissipating 400 W without latch-up or parametric shift. |
| Telecom AC-DC Adapter Secondary-Side Protection | Consumer Appliance Motor Drive Gate Protection |
|
Use Scenario: Shielding secondary-side 12–24 V output rails in wall-mounted telecom adapters from cross-coupled noise and surge coupling via shared transformer windings. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor tied between output rail and GND, selected for 75 V VWM to accommodate 20 % output tolerance and ripple. Use Value: Prevents latch-up in downstream USB-PD controllers by limiting transient excursions to 134 V, well below their 16 V absolute max ratings on VBUS monitoring pins. |
Use Scenario: Protecting gate-source terminals of N-channel MOSFETs in brushed DC motor H-bridges subjected to back-EMF reversal and commutation spikes. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly across gate and source to clamp sub-100 ns spikes before they exceed MOSFET VGS rating (±20 V typical). Use Value: Enables use of cost-optimized MOSFETs without integrated gate protection by delivering 134 V clamping at 3.0 A with <1 ns response, reducing gate oxide stress. |
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-E3/61 | Lower clamping voltage (121 V vs. 134 V) and tighter VBR range (83.3–92.1 V vs. 83.3–102 V); same VWM, PPPM, and package. | Better suited for systems requiring tighter overvoltage margin below 125 V; not interchangeable where 134 V clamping headroom is required. | Select SMAJ75A-E3/61 only if protected ICs have strict VMAX < 125 V and design allows reduced VBR tolerance. |
| SMCJ75A-E3/73 | Higher power rating (1500 W), larger DO-214AB (SMC) package, 121 V clamping, and 75 V VWM; identical electrical function but different thermal and layout constraints. | Used where higher surge repetition rate or longer pulse duration demands greater energy dissipation than SMAJ75-E3/61's 400 W can provide. | Choose SMCJ75A-E3/73 only when PCB space permits larger footprint and thermal management supports higher power density. |
Compared with SMAJ75-E3/61, SMAJ75A-E3/61 offers tighter clamping but less VBR margin, while SMCJ75A-E3/73 provides 3.75× higher pulse power in a larger package - making SMAJ75-E3/61 optimal for space-constrained 400 W surge protection with 75 V system compatibility.
Availability
SMAJ75-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMAJ75-E3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability applications - balancing low-profile packaging, precise voltage thresholds, and repeatable clamping performance across automotive, industrial, and telecom environments.
FAQ
What is the maximum clamping voltage of SMAJ75-E3/61 under standard test conditions?
The SMAJ75-E3/61 has a maximum clamping voltage (VC) of 134 V when subjected to its rated peak pulse current of 3.0 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C on standard 0.2 × 0.2" copper pads and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ75-E3/61 maintains this clamping performance consistently due to its glass-passivated junction and controlled avalanche characteristics.
Is SMAJ75-E3/61 suitable for automotive applications?
SMAJ75-E3/61 is a commercial-grade part (E3 suffix) and not AEC-Q101 qualified; it lacks the extended temperature screening and failure mode validation required for automotive under-hood or safety-critical systems. For such uses, Vishay specifies the HE3-suffix variant (e.g., SMAJ75AHE3/61). The SMAJ75-E3/61 remains appropriate for non-automotive industrial, telecom, and consumer applications where ambient temperatures stay within –55 °C to +150 °C and qualification to AEC standards is not mandated.
What does the "-E3/61" suffix indicate in SMAJ75-E3/61?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin plating meeting JESD201 Class 1A whisker resistance, while "/61" specifies packaging in 7-inch plastic tape-and-reel format with 1800 units per reel. This ordering code ensures consistent sourcing of the correct termination finish, reliability grade, and logistics configuration. The SMAJ75-E3/61 thus guarantees compliance with EU environmental directives and compatibility with standard SMT pick-and-place equipment calibrated for 7" reels.
How does SMAJ75-E3/61 differ from SMAJ75A-E3/61?
SMAJ75-E3/61 is unidirectional with a broader breakdown voltage range (83.3–102 V) and higher clamping voltage (134 V), whereas SMAJ75A-E3/61 offers tighter VBR (83.3–92.1 V) and lower clamping (121 V) due to enhanced process control. Both share identical VWM (75 V), PPPM (400 W), and DO-214AC packaging. The SMAJ75-E3/61 provides greater margin against false triggering in noisy environments, while SMAJ75A-E3/61 suits designs needing stricter overvoltage containment.
What is the thermal resistance of SMAJ75-E3/61, and how does it affect layout?
SMAJ75-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves surge repetition capability. Layouts must allocate adequate copper to prevent junction temperature from exceeding 150 °C during repeated transients - especially critical when using SMAJ75-E3/61 in high-duty-cycle industrial controls.
SMAJ75-E3/61 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):
- 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-E3/61 FAQ
1.How can I place an order for SMAJ75-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75-E3/61 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 SMAJ75-E3/61 reliable?
The price and inventory of SMAJ75-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ75-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75-E3/61?
SMAJ75-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75-E3/61 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 SMAJ75-E3/61?
For technical support, including SMAJ75-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75-E3/61 requirements.
6.How does Aetrix verify that SMAJ75-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ75-E3/61 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 SMAJ75-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ75-E3/61?
All SMAJ75-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75-E3/61, 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 SMAJ75-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ75-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ75-E3/61 Tags
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