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Vishay General Semiconductor - Diodes Division SMAJ75CAHE3/61
- Part No.:
- SMAJ75CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75CAHE3/61.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,870
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Product details
Overview
SMAJ75CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 75 V stand-off 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 for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ75CAHE3/61 datasheet, SMAJ75CAHE3/61 pinout, SMAJ75CAHE3/61 application, or SMAJ75CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 121 V clamping voltage at rated surge current, RoHS-compliant matte tin-plated leads, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 75 V), while the low incremental surge resistance supports fast energy dissipation during ESD or lightning-induced surges.
The SMAJ75CAHE3/61 is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable transient response. |
| VC (Clamping Voltage) | 121 V at IPPM = 3.3 A - Limits downstream voltage stress during 10/1000 μs surge, protecting 100 V-rated components. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Sustains high-energy transients common in automotive load-dump or inductive switching events. |
| ID (Reverse Leakage) | ≤1.0 μA at 75 V - Minimizes standby power loss and avoids false triggering in low-power sensor interfaces. |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; polarity unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking required; either terminal serves as input/output for transient suppression in AC or dual-polarity DC paths. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled signal lines without external polarity management. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from relay coil flyback or alternator load dump in 12 V automotive systems. |
| AEC-Q101 qualification (HE3 suffix) | Confirms suitability for automotive ECUs, body controllers, and ADAS sensor interfaces requiring long-term field reliability. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, critical for consistent clamping performance in harsh environments. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver I/O pins from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between protected line and ground, responding within <1 ps to limit voltage excursion. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic inputs by clamping to ≤121 V during 400 W surges, meeting ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Shielding 24 V DC digital input circuits from inductive kickback when interfacing with solenoids or relays in factory automation. IC Role / Device Role / Timing Role: Standoff protector across input terminals, conducting only during transient events exceeding 75 V. Use Value: Maintains system uptime by avoiding false triggering or component failure during repetitive 100 V/100 ms surges common in industrial control cabinets. |
| Automotive Camera Sensor Interface | Telecom Base Station Power Monitoring |
Use Scenario: Safeguarding MIPI CSI-2 data lines and power rails of rear-view camera modules exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector, suppressing ±15 kV contact ESD per IEC 61000-4-2. Use Value: Preserves signal integrity with minimal parasitic capacitance while delivering sub-nanosecond response to protect 1.8 V image sensor interfaces. |
Use Scenario: Protecting voltage-sense inputs of DC-DC converters monitoring -48 V telecom power distribution systems. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to system ground, handling polarity-reversal faults and lightning-induced surges. Use Value: Extends converter lifespan by limiting sensed voltage to 121 V during 400 W transients, preventing ADC saturation or controller reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-M3/61 | Halogen-free, RoHS-compliant, commercial-grade; lacks AEC-Q101 qualification. | Not approved for automotive under-hood use; suitable for industrial or consumer equipment with lower reliability demands. | Select when halogen-free compliance is mandatory and automotive qualification is unnecessary. |
| SMAJ75AHE3/61 | Unidirectional version with cathode band marking; same VWM/VBR/VC ratings but asymmetric conduction. | Requires correct polarity orientation; unsuitable for AC or floating differential lines where bidirectional protection is essential. | Choose only if circuit topology guarantees fixed polarity and space constraints favor identical footprint. |
Compared with SMAJ75CAHE3/61, the M3 variant trades automotive qualification for halogen-free materials, while the unidirectional HE3 version sacrifices polarity flexibility for marginally lower leakage - making SMAJ75CAHE3/61 the optimal choice for AEC-Q101–required bidirectional protection in space-constrained automotive and industrial designs.
Availability
SMAJ75CAHE3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power monitoring systems requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ75CAHE3/61 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 targets board-level transient suppression in automotive, industrial, and telecom systems, engineered for high surge robustness, tight parametric tolerances, and seamless integration into automated SMT manufacturing flows.
FAQ
What is the clamping voltage of SMAJ75CAHE3/61 at its rated peak pulse current?
The SMAJ75CAHE3/61 has a maximum clamping voltage (VC) of 121 V at 3.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value ensures downstream components rated up to 100 V remain within safe operating limits during surge events. The clamping performance is validated per ANSI/IEEE C62.35 standards and confirmed in Vishay's official datasheet revision 09-Jan-2024.
Is SMAJ75CAHE3/61 suitable for automotive applications?
Yes, SMAJ75CAHE3/61 is AEC-Q101 qualified, as indicated by the "HE3" suffix, and is explicitly intended for automotive use including body electronics, infotainment interfaces, and ADAS sensor protection. It passes temperature cycling, highly accelerated life testing (HALT), and ESD robustness validation per AEC-Q101 requirements, making it appropriate for under-hood and cabin-mounted systems.
What does the "CA" suffix signify in SMAJ75CAHE3/61?
The "CA" suffix in SMAJ75CAHE3/61 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMAJ75AHE3/61), it has no polarity marking and functions identically regardless of terminal orientation, simplifying layout for AC-coupled or floating signal lines.
What is the thermal resistance of SMAJ75CAHE3/61 in standard mounting conditions?
The SMAJ75CAHE3/61 exhibits 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. This value assumes standard FR-4 PCB construction and natural convection cooling; forced airflow or additional copper area can reduce effective RθJA and improve surge endurance.
Does SMAJ75CAHE3/61 meet lead-free reflow requirements?
Yes, SMAJ75CAHE3/61 meets J-STD-020 MSL Level 1 and supports peak reflow temperatures up to 260 °C, fully compatible with lead-free soldering processes. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the package is rated for unlimited floor life when stored per JEDEC guidelines.
SMAJ75CAHE3/61 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ75CAHE3/61 FAQ
1.How can I place an order for SMAJ75CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75CAHE3/61 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 SMAJ75CAHE3/61 reliable?
The price and inventory of SMAJ75CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ75CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75CAHE3/61?
SMAJ75CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75CAHE3/61 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 SMAJ75CAHE3/61?
For technical support, including SMAJ75CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ75CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ75CAHE3/61 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 SMAJ75CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ75CAHE3/61?
All SMAJ75CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75CAHE3/61, 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 SMAJ75CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ75CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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