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Vishay General Semiconductor - Diodes Division SMAJ7.5CAHE3/61
- Part No.:
- SMAJ7.5CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CAHE3/61.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,733
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Product details
Overview
SMAJ7.5CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ7.5CAHE3/61 datasheet, SMAJ7.5CAHE3/61 pinout, SMAJ7.5CAHE3/61 application, or SMAJ7.5CAHE3/61 equivalent, this device serves as an AEC-Q101 qualified, RoHS-compliant, bidirectional TVS for high-reliability transient suppression where low clamping voltage, fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR min/max (8.33–9.21 V), VC (12.9 V), and IPPM (31.0 A) specifications. Its glass-passivated junction ensures stable leakage (<100 μA at VWM) and low incremental surge resistance, enabling precise voltage clamping during fast transients such as EFT (IEC 61000-4-4) and lightning surges (IEC 61000-4-5).
The device is rated for 400 W peak pulse power (derated to 300 W above 78 V), mounted on 0.2" × 0.2" copper pads, and exhibits a thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak temperature without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 5 V–12 V rail protection. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on before system damage occurs. |
| VC @ IPPM | 12.9 V at 31.0 A - Clamped voltage under 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 400 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity. |
| ID @ VWM | <100 μA - Low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount, low-profile package compatible with automated placement and J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional configuration has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current bidirectionally when voltage exceeds ±VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 400 W peak pulse power (10/1000 μs) | Withstands repeated 4 kV surge events per IEC 61000-4-5 without degradation when properly mounted. |
| Clamping ratio VC/VBR = 1.55 | Low overvoltage margin ensures tighter protection window than standard Zener-based suppressors. |
| MSL Level 1, 260 °C peak reflow | Eliminates need for moisture-sensitive device baking prior to SMT assembly. |
| Glass passivated junction | Provides stable leakage and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient overshoot to ≤12.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive microcontrollers. |
Use Scenario: Shielding digital input/output channels in programmable logic controllers against EFT bursts and inductive switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on each I/O line to shunt surge energy before reaching optocoupler or level-shifter inputs. Use Value: Maintains signal integrity during 2 kV EFT testing (IEC 61000-4-4) with sub-1 ns response and no signal distortion in steady state. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
|
Use Scenario: Surge protection on Ethernet PHY lines (10/100BASE-TX) and RS-485 data buses exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end clamp on twisted-pair lines, coordinated with secondary GDT or polymer PTC devices. Use Value: Delivers 400 W pulse handling with 12.9 V clamping, meeting Telcordia GR-1089-CORE Level 3 surge requirements. |
Use Scenario: ESD protection for USB 2.0 data lines and HDMI/DisplayPort hot-plug detection pins in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point to divert HBM ±15 kV discharges. Use Value: Achieves <100 μA leakage at 7.5 V, preserving signal rise time while passing IEC 61000-4-2 Level 4 (±8 kV contact). |
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-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM material declarations. | Choose SMAJ7.5CA-M3/61 when halogen-free bill-of-materials is required; otherwise SMAJ7.5CAHE3/61 offers same performance with standard RoHS compliance. |
| SMBJ7.5CAHE3/61 | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W peak pulse power rating. | Higher power handling suits higher-energy surge environments (e.g., outdoor telecom cabinets), but requires larger PCB footprint. | Choose SMBJ7.5CAHE3/61 only if 600 W surge margin is needed and board space allows SMB footprint; SMAJ7.5CAHE3/61 remains optimal for space-constrained automotive and portable designs. |
Compared with SMAJ7.5CA-M3/61, the SMAJ7.5CAHE3/61 provides identical protection performance with standard RoHS compliance, while SMBJ7.5CAHE3/61 trades compact size for 50 % higher pulse power - making SMAJ7.5CAHE3/61 the balanced choice for AEC-Q101 automotive and industrial applications demanding reliability, small form factor, and proven surge immunity.
Availability
SMAJ7.5CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and AEC-Q101 assurance.
Supply support for SMAJ7.5CAHE3/61 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 automotive-grade qualification.
The SMAJ series is engineered for high-speed transient suppression in harsh environments, targeting automotive, industrial, and communications systems where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMAJ7.5CAHE3/61 under a 10/1000 μs surge?
The SMAJ7.5CAHE3/61 has a maximum clamping voltage (VC) of 12.9 V at 31.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and reflects the actual voltage seen by protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ7.5CAHE3/61 suitable for automotive applications?
Yes, SMAJ7.5CAHE3/61 is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation up to +150 °C junction temperature - meeting requirements for engine control, body electronics, and ADAS sensor protection where reliability under thermal and electrical stress is essential.
How does the bidirectional design of SMAJ7.5CAHE3/61 affect its circuit implementation?
The bidirectional design of SMAJ7.5CAHE3/61 means it functions identically in both polarities, with no cathode marking and symmetrical VBR and VC characteristics. This eliminates polarity concerns during layout and enables direct placement across AC-coupled lines, differential buses (e.g., RS-485), or ungrounded signal paths - simplifying design and reducing BOM complexity versus unidirectional alternatives.
What is the maximum reverse leakage current for SMAJ7.5CAHE3/61 at its stand-off voltage?
The SMAJ7.5CAHE3/61 specifies a maximum reverse leakage current (ID) of 100 μA at its 7.5 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-operated systems - confirmed across production lots per Vishay's characterization data.
Does SMAJ7.5CAHE3/61 require special PCB layout considerations?
Yes - for optimal surge performance, SMAJ7.5CAHE3/61 must be mounted on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Short, wide traces to ground/power planes reduce inductance and ensure clamping voltage remains at the specified 12.9 V; longer traces increase effective VC and compromise protection efficacy.
SMAJ7.5CAHE3/61 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMAJ7.5CAHE3/61 FAQ
1.How can I place an order for SMAJ7.5CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CAHE3/61 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 SMAJ7.5CAHE3/61 reliable?
The price and inventory of SMAJ7.5CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CAHE3/61?
SMAJ7.5CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CAHE3/61 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 SMAJ7.5CAHE3/61?
For technical support, including SMAJ7.5CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ7.5CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CAHE3/61 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 SMAJ7.5CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CAHE3/61?
All SMAJ7.5CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CAHE3/61, 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 SMAJ7.5CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.5CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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