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Vishay General Semiconductor - Diodes Division SMAJ7.0CAHE3/61
- Part No.:
- SMAJ7.0CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0CAHE3/61.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,603
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Product details
Overview
SMAJ7.0CAHE3/61 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 and power lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA test current, 12.0 V maximum clamping voltage (VC) at 33.3 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 SMAJ7.0CAHE3/61 datasheet, SMAJ7.0CAHE3/61 pinout, SMAJ7.0CAHE3/61 application, or SMAJ7.0CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.71), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling use without polarity consideration on AC-coupled or differential signal lines. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD or lightning-induced surges.
The SMAJ7.0CAHE3/61 is rated for 400 W peak pulse power up to 78 V and derates to 300 W above that threshold; its thermal resistance (RθJA = 120 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in harsh environments when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing margin for protected line. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown window ensures reliable turn-on within spec across production lot and temperature. |
| VC @ IPPM | 12.0 V at 33.3 A - Clamping voltage under standardized 10/1000 μs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 400 W - Peak transient power handling with 10/1000 μs waveform; validates protection against IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | 200 μA - Reverse leakage at stand-off voltage; low enough to avoid signal integrity degradation in high-impedance sensor interfaces. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive or industrial motor drive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, LF peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical junction; completes low-impedance path to ground or return rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surge events up to 1 kV/2 Ω without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics including body control modules, infotainment power rails, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with external connectors. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage performance across thermal cycling and humidity exposure. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails feeding microcontrollers and CAN transceivers in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power input and local LDO/regulator input. Use Value: Limits transients from load dump or alternator ripple to ≤12.0 V, preventing latch-up or damage to 16 V-rated downstream ICs. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance shunt protector across signal and return lines, upstream of op-amp input stage. Use Value: Maintains signal fidelity with <200 μA leakage at 7.0 V while clamping ±15 kV contact ESD per IEC 61000-4-2. |
| Consumer USB Port ESD Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary common-mode choke, before USB controller PHY. Use Value: Sub-1 ns response captures ESD events before propagation; bidirectional symmetry avoids polarity routing constraints. |
Use Scenario: Protecting RS-485 transceiver inputs in outdoor telecom base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to ground, sized for 400 W common-mode surge handling. Use Value: Withstands repetitive 10/1000 μs surges up to 33.3 A without parameter shift, supporting 20-year field life in unshielded installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CA-M3/61 | Same electrical specs; halogen-free, RoHS-compliant, commercial grade (not AEC-Q101 qualified) | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free compliance is prioritized. |
| SMBJ7.0CAHE3/61 | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package; 600 W PPPM rating (vs. 400 W), higher IPPM (50.0 A) | Higher power handling enables use in higher-energy surge environments (e.g., 48 V industrial buses); larger footprint required | Choose when system-level surge testing exceeds 400 W or PCB layout allows SMB footprint; retains AEC-Q101 and HE3 suffix. |
Compared with SMAJ7.0CAHE3/61, the M3 variant trades automotive qualification for halogen-free compliance, while the SMBJ7.0CAHE3/61 offers 50% higher surge capacity at the cost of board area - making SMAJ7.0CAHE3/61 optimal for space-constrained AEC-Q101 designs needing precise 400 W protection.
Availability
SMAJ7.0CAHE3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer USB power delivery, and telecom line protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ7.0CAHE3/61 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 high-reliability transient suppression in automotive, industrial, and communications infrastructure - delivering consistent clamping performance under repetitive surge stress and extended temperature operation.
FAQ
What is the clamping voltage of SMAJ7.0CAHE3/61 at its rated peak pulse current?
The SMAJ7.0CAHE3/61 has a maximum clamping voltage (VC) of 12.0 V at 33.3 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed across temperature and production lots per Vishay's datasheet revision 09-Jan-2024, Document Number 88390. The clamping voltage directly determines the maximum overvoltage seen by protected circuitry during surge events, making it a critical parameter for interface-level protection design using SMAJ7.0CAHE3/61.
Is SMAJ7.0CAHE3/61 suitable for automotive applications?
Yes, SMAJ7.0CAHE3/61 is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and documented in Vishay's official datasheet. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD verification - validating its suitability for under-hood and chassis-mounted automotive electronics such as power distribution units, lighting controllers, and ADAS sensor modules where SMAJ7.0CAHE3/61 provides certified transient immunity.
What is the difference between SMAJ7.0CAHE3/61 and SMAJ7.0AHE3/61?
SMAJ7.0CAHE3/61 is bidirectional, while SMAJ7.0AHE3/61 is unidirectional - indicated by the "CA" vs. "A" suffix. The bidirectional version clamps symmetrically in both polarities, eliminating need for polarity-aware PCB layout; the unidirectional version requires cathode-band orientation and conducts forward surge only. Both share identical VWM (7.0 V), VBR (7.78–8.60 V), and VC (12.0 V), but SMAJ7.0CAHE3/61 is preferred for AC-coupled or differential signal lines where SMAJ7.0CAHE3/61 simplifies design and improves fault tolerance.
What package type does SMAJ7.0CAHE3/61 use, and what are its mounting requirements?
SMAJ7.0CAHE3/61 uses the SMA (DO-214AC) surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. It requires mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 400 W pulse power dissipation. The device is MSL Level 1 and supports lead-free reflow up to 260 °C peak, making SMAJ7.0CAHE3/61 compatible with standard high-volume SMT assembly without preconditioning.
Does SMAJ7.0CAHE3/61 have polarity markings on the case?
No, SMAJ7.0CAHE3/61 does not have polarity markings because it is a bidirectional TVS diode - its internal structure is symmetrical, allowing identical clamping behavior regardless of voltage polarity applied across its terminals. Unlike unidirectional variants (e.g., SMAJ7.0AHE3/61) that feature a cathode band, SMAJ7.0CAHE3/61 is marked only with device code (e.g., "WM") per Vishay's standard labeling; this absence of banding simplifies PCB layout and eliminates orientation errors during SMAJ7.0CAHE3/61 placement.
SMAJ7.0CAHE3/61 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- 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)
SMAJ7.0CAHE3/61 FAQ
1.How can I place an order for SMAJ7.0CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0CAHE3/61 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 SMAJ7.0CAHE3/61 reliable?
The price and inventory of SMAJ7.0CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ7.0CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0CAHE3/61?
SMAJ7.0CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0CAHE3/61 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 SMAJ7.0CAHE3/61?
For technical support, including SMAJ7.0CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ7.0CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0CAHE3/61 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 SMAJ7.0CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ7.0CAHE3/61?
All SMAJ7.0CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0CAHE3/61, 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 SMAJ7.0CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ7.0CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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