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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHE3_A/H
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- Part No.:
- SMBJ7.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,772
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Product details
Overview
SMBJ7.5CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHE3_A/H datasheet, SMBJ7.5CAHE3_A/H pinout, SMBJ7.5CAHE3_A/H application, or SMBJ7.5CAHE3_A/H equivalent, key selection criteria include bidirectional surge suppression capability, AEC-Q101 qualification status, clamping voltage margin relative to protected circuit's absolute maximum rating, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both polarities, enabling robust protection against ESD, lightning-induced surges, and inductive switching transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during repetitive 0.01% duty cycle pulses.
The SMBJ7.5CAHE3_A/H is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive-grade reliability requirements when specified with HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum reverse stand-off voltage before significant conduction; defines upper limit of normal operating voltage on protected line. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamping voltage under 10/1000 µs surge defines worst-case overvoltage seen by downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity with standardized waveform; determines transient energy absorption capability. |
| IPPM | 46.5 A - Maximum non-repetitive peak pulse current supported; sets minimum surge current immunity level. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; critical for thermal design margining. |
| TJ max | +150 °C - Maximum allowable junction temperature; enables operation in high-ambient environments like engine bays or industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Conducts during negative-going transients; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry point (positive polarity) | Conducts during positive-going transients; completes bidirectional clamping loop with anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualification | Validates reliability for automotive applications including infotainment, body control, and ADAS sensor interfaces. |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance when combined with appropriate series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking preconditioning. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protecting encoder feedback lines and Hall-effect sensor outputs from inductive kickback in BLDC motor controllers. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry to shunt transients before reaching MCU GPIO or analog front-end. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs during 100 V/100 ns edge transients induced by nearby power switching. |
Use Scenario: Shielding LIN bus transceivers and pressure sensor signal paths in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bidirectional data line, operating symmetrically across ±12 V supply rails. Use Value: Maintains signal integrity during 10/1000 µs surges up to 46.5 A while holding clamped voltage below 13 V - within LIN physical layer tolerance. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Safeguarding 48 V PoE-powered Ethernet switch ports against lightning-induced common-mode surges on data pairs. IC Role / Device Role / Timing Role: Secondary-level TVS mounted after primary gas discharge tube, absorbing residual energy in differential mode. Use Value: Limits differential overvoltage to ≤12.9 V during 600 W transient events, preventing damage to PHY magnetics and Ethernet controller ESD structures. |
Use Scenario: Protecting USB-C CC and SBU pins in portable devices against ESD and hot-plug transients during cable insertion. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector to minimize stub length and preserve signal fidelity. Use Value: Provides <1 ns response and <1 µA leakage at 7.5 V, ensuring no impact on USB-C enumeration timing or VCONN detection logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-E3/52 | Commercial-grade (non-AEC-Q101), same electrical specs and SMB package. | Lacks automotive qualification; suitable for industrial/commercial designs without automotive reliability mandates. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SAC7.5 | Same VWM and VC, but SOD-123FL package (smaller footprint, higher RθJA = 150 °C/W). | Lower power handling due to thermal limitations; best for low-duty-cycle ESD-only scenarios. | Choose only for space-constrained layouts where 600 W surge rating is not needed. |
Compared with SMBJ7.5CAHE3_A/H, the SMBJ7.5CA-E3/52 offers identical protection performance without automotive qualification, while SAC7.5 trades package size for reduced thermal and surge capability - making SMBJ7.5CAHE3_A/H the optimal choice for AEC-Q101-compliant, high-energy transient environments.
Availability
SMBJ7.5CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ7.5CAHE3_A/H 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 SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ7.5CAHE3_A/H provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. This differs from unidirectional variants (e.g., SMBJ7.5A) that require correct anode/cathode orientation and only clamp in one direction. The CA version is ideal for AC-coupled or floating signal lines where polarity is undefined or alternating.
Is SMBJ7.5CAHE3_A/H suitable for automotive applications?
Yes - SMBJ7.5CAHE3_A/H carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. This certification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and lifetime stress testing. It is approved for use in engine control units, body electronics, and ADAS sensor modules where transient immunity and long-term stability are mandatory.
What is the maximum clamping voltage of SMBJ7.5CAHE3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CAHE3_A/H is 12.9 V at 46.5 A peak pulse current with a 10/1000 µs waveform. This value represents the highest voltage that will appear across the device during a standardized surge event, directly defining the overvoltage stress imposed on downstream components such as microcontrollers or transceivers.
How does the thermal resistance of SMBJ7.5CAHE3_A/H affect PCB layout?
SMBJ7.5CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must ensure adequate copper area and avoid excessive trace length between the device and ground/power planes. Reducing pad size or adding thermal vias can significantly improve heat dissipation beyond the baseline spec.
Can SMBJ7.5CAHE3_A/H replace SMBJ7.5A in an existing design?
No - SMBJ7.5CAHE3_A/H is bidirectional, whereas SMBJ7.5A is unidirectional. Substituting them requires verifying circuit topology: SMBJ7.5CAHE3_A/H may be used in place of SMBJ7.5A only if polarity is irrelevant (e.g., differential lines or AC signals), but it cannot replace SMBJ7.5A in DC-biased unidirectional paths without risking improper clamping behavior or increased leakage. Always confirm signal polarity and grounding scheme before substitution.
SMBJ7.5CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ7.5CAHE3_A/H FAQ
1.How can I place an order for SMBJ7.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHE3_A/H 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 SMBJ7.5CAHE3_A/H reliable?
The price and inventory of SMBJ7.5CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHE3_A/H?
SMBJ7.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHE3_A/H 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 SMBJ7.5CAHE3_A/H?
For technical support, including SMBJ7.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ7.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHE3_A/H 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 SMBJ7.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHE3_A/H?
All SMBJ7.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHE3_A/H, 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 SMBJ7.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHE3_A/H Tags
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