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Vishay General Semiconductor - Diodes Division SMAJ7.5C-E3/61
- Part No.:
- SMAJ7.5C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5C-E3/61.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ7.5C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 14.3 V maximum clamping voltage (VC) at 28.0 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ7.5C-E3/61 datasheet, SMAJ7.5C-E3/61 pinout, SMAJ7.5C-E3/61 application, or SMAJ7.5C-E3/61 equivalent, key selection criteria include bi-directional surge capability, low clamping ratio (VC/VWM = 1.91), RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 8.33–10.2 V under 1.0 mA test current. Its clamping behavior is defined by a low incremental surge resistance, enabling rapid response to ESD and lightning-induced transients per IEC 61000-4-2 and IEC 61000-4-5.
The device is rated for junction temperatures from –55 °C to +150 °C, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets J-STD-020 MSL Level 1, supports solder reflow up to 260 °C, and complies with RoHS 2002/95/EC and WEEE 2002/96/EC directives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal line operating margin. |
| VC @ IPPM | 14.3 V - Clamped voltage during 28.0 A 10/1000 µs surge; limits stress on downstream ICs to safe levels. |
| IPPM | 28.0 A - Peak surge current handling capacity under standard waveform; determines protection robustness against 1 kV/500 A transients. |
| PPPM | 400 W - Peak pulse power dissipation; enables reliable suppression of high-energy transients without thermal runaway. |
| VBR min/max | 8.33 V / 10.2 V - Breakdown voltage range at 1.0 mA; ensures consistent turn-on across production lots and temperature. |
| ID @ VWM | 100 µA - Reverse leakage at stand-off voltage; negligible loading on low-power sensor or communication lines. |
| Package | DO-214AC (SMA) - Surface-mount outline with 5.28 mm max length, optimized for automated pick-and-place and board space efficiency. |
Pinout & Package
DO-214AC (SMA) package: bi-directional device with no polarity marking; symmetrical two-terminal construction. Cathode band absent - terminals are interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals conduct identically during overvoltage events; no DC polarity dependency - suitable for AC signal lines and floating buses. |
| Case (exposed cathode pad) | Thermal and mechanical anchor | Non-electrical; provides thermal path to PCB copper and mechanical stability - requires minimum 5.0 × 5.0 mm pad per terminal per datasheet Fig. 5. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, audio inputs) without polarity concerns. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance when mounted per recommended pad layout. |
| Low clamping ratio (VC/VWM = 1.91) | Minimizes voltage overshoot during clamping - critical for protecting 5 V or 3.3 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles without baking - reduces manufacturing complexity and cost. |
| RoHS-compliant matte tin plating | Ensures solderability per J-STD-002 and JESD22-B102, with JESD 201 Class 1A whisker resistance for long-term reliability. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤14.3 V, preventing latch-up or damage to 5 V-tolerant ADC front-ends while maintaining signal integrity below 7.5 V. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subjected to ground bounce and cable ESD. IC Role / Device Role: Line-to-line and line-to-ground TVS on A/B differential pair and common-mode bus nodes. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) and 1 kV ring wave surges (IEC 61000-4-5) without degrading data integrity at 10 Mbps. |
| Consumer USB Port Protection | DC Power Input Stage |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in portable medical devices from user-handling ESD. IC Role / Device Role: Bidirectional TVS bridging differential pair to ground, placed adjacent to connector. Use Value: Sub-100 pF junction capacitance (typ.) avoids signal rise-time degradation; 14.3 V clamping prevents USB PHY latch-up. |
Use Scenario: Suppressing switching spikes and load dump transients on 12 V DC input rails of embedded controllers. IC Role / Device Role: Parallel-connected TVS between VIN and GND, upstream of DC-DC converter input filter. Use Value: Absorbs 400 W surges without failure, maintaining system uptime during automotive battery disconnect/reconnect 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 |
|---|---|---|---|
| SMAJ7.5CA-E3/61 | Identical electrical specs and package; CA suffix denotes same bi-directional configuration per Vishay ordering nomenclature - functionally identical to SMAJ7.5C-E3/61. | No functional difference; both rated for same VWM, VC, and IPPM; CA variant may reflect minor internal process revision but shares full qualification data. | Select SMAJ7.5CA-E3/61 only if legacy BOM specifies CA suffix; otherwise SMAJ7.5C-E3/61 is direct procurement option. |
| SMBJ7.5C-E3/52 | Same VWM (7.5 V) and bi-directional function, but in larger DO-214AA (SMB) package with 600 W PPPM rating and 38.9 A IPPM. | Higher surge capacity suits harsher environments (e.g., railway traction control), but requires larger PCB area and different pad layout. | Choose SMBJ7.5C-E3/52 when system-level surge testing exceeds 400 W requirements; not drop-in due to footprint change. |
Compared with SMAJ7.5C-E3/61, SMAJ7.5CA-E3/61 offers identical protection performance in the same footprint, while SMBJ7.5C-E3/52 trades compactness for higher surge margin - making the former ideal for space-constrained designs and the latter for high-reliability power rail applications.
Availability
SMAJ7.5C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, and consumer USB interface hardening requiring stable component supply and full traceability.
Supply support for SMAJ7.5C-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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMAJ series was developed specifically for surface-mount transient suppression in space-constrained, high-volume applications - balancing low clamping voltage, fast response, and robust surge handling for automotive, industrial, and telecom end equipment.
FAQ
What is the clamping voltage of SMAJ7.5C-E3/61 under maximum rated surge current?
The SMAJ7.5C-E3/61 exhibits a maximum clamping voltage (VC) of 14.3 V when subjected to its rated 28.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across temperature and production lot, ensuring predictable protection for downstream 5 V logic circuits. The clamping occurs within nanoseconds of transient onset due to the device's avalanche structure.
Is SMAJ7.5C-E3/61 unidirectional or bidirectional, and how is polarity identified?
SMAJ7.5C-E3/61 is a bi-directional transient voltage suppressor, meaning it clamps overvoltage transients equally in both directions - no cathode band or polarity marking is present on the DO-214AC (SMA) package. This makes SMAJ7.5C-E3/61 suitable for AC signal lines, differential buses, and floating power domains where polarity reversal may occur.
Does SMAJ7.5C-E3/61 meet automotive qualification standards?
SMAJ7.5C-E3/61 is RoHS-compliant and qualified to MSL Level 1 per J-STD-020, but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, the HE3-suffix variants (e.g., SMAJ7.5CHE3/61) must be selected - those parts undergo additional stress testing and screening per the AEC specification.
What is the maximum reverse leakage current of SMAJ7.5C-E3/61 at its stand-off voltage?
At its 7.5 V stand-off voltage (VWM), the SMAJ7.5C-E3/61 exhibits a maximum reverse leakage current (ID) of 100 µA at 25 °C. This low leakage ensures minimal impact on high-impedance sensor outputs or battery-powered circuits, preserving signal accuracy and extending operational battery life.
Can SMAJ7.5C-E3/61 be used in place of SMAJ7.5A-E3/61?
No - SMAJ7.5C-E3/61 is bi-directional, whereas SMAJ7.5A-E3/61 is unidirectional with a cathode band marking. Substituting them risks improper clamping on AC or bidirectional signals. The "C" suffix explicitly denotes bi-directional operation per Vishay's naming convention; "A" indicates unidirectional. Always verify suffix functionality before replacement.
SMAJ7.5C-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:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ7.5C-E3/61 FAQ
1.How can I place an order for SMAJ7.5C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5C-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 SMAJ7.5C-E3/61 reliable?
The price and inventory of SMAJ7.5C-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 SMAJ7.5C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5C-E3/61?
SMAJ7.5C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5C-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 SMAJ7.5C-E3/61?
For technical support, including SMAJ7.5C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5C-E3/61 requirements.
6.How does Aetrix verify that SMAJ7.5C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5C-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 SMAJ7.5C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5C-E3/61?
All SMAJ7.5C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5C-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 SMAJ7.5C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.5C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5C-E3/61 Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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