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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHE3/5B
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- Part No.:
- SMBJ7.5CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHE3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
SMBJ7.5CAHE3/5B 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 or power lines. It features 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 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHE3/5B datasheet, SMBJ7.5CAHE3/5B pinout, SMBJ7.5CAHE3/5B application, or SMBJ7.5CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 12.9 V clamping under 46.5 A surge, thermal resistance (RθJA = 100 °C/W), 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 breakdown in both directions, enabling suppression of positive and negative 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 ESD or lightning-induced surges.
The SMBJ7.5CAHE3/5B is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 1.0 µA max reverse leakage at VWM and 0.067 %/°C VBR temperature coefficient enable predictable behavior across automotive and industrial thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - guaranteed avalanche onset range defining protection threshold |
| VC @ IPPM | 12.9 V at 46.5 A - clamped voltage during full 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W with 10/1000 µs waveform - standardized surge handling capacity for IEC 61000-4-5 compliance |
| ID @ VWM | 1.0 µA max - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces |
| TJ max | +150 °C - enables use in under-hood automotive or high-ambient industrial enclosures |
| RθJA | 100 °C/W - thermal performance baseline for PCB pad layout design (0.2" × 0.2" copper) |
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 (negative half-cycle) | One terminal of symmetrical PN junction; conducts during negative overvoltage events |
| Cathode | Transient current entry (positive half-cycle) | Other terminal of symmetrical PN junction; conducts during positive overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial Ethernet and RS-485 interfaces |
| AEC-Q101 qualification | Validated reliability for automotive body electronics, infotainment power rails, and ADAS sensor supply lines |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns - no baking required pre-assembly |
| Glass passivated junction | Ensures stable VBR and low leakage over 10+ year field life in humid or thermally cycled environments |
Applications
| Industrial Motor Control | Automotive Body Control Module |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail or signal line to clamp ±1 kV transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic circuits by limiting voltage to ≤12.9 V during 46.5 A surge events. |
Use Scenario: Guarding LIN bus transceiver inputs and power supply inputs in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 µs surges up to 600 W without degradation. Use Value: Maintains system uptime by surviving >1000 surge cycles per AEC-Q101 stress test, eliminating field failures from battery transients. |
| Telecom Power Supply Input | Consumer Sensor Interface |
Use Scenario: Input-stage protection for 12 V DC-DC converters in base station remote radio units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device upstream of input filter capacitors, shunting surge energy to ground. Use Value: Limits peak voltage to 12.9 V during 600 W transients, preventing overstress of primary-side MOSFETs and controller ICs. |
Use Scenario: ESD protection on analog output lines of MEMS accelerometers and environmental sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) bidirectional suppressor placed directly at connector interface. Use Value: Preserves signal fidelity with <1 µA leakage at 7.5 V while passing IEC 61000-4-2 ±8 kV contact discharge. |
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-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM specs, identical SMB package | Lacks automotive qualification; suitable for industrial/commercial designs without AEC compliance mandates | Select when cost sensitivity outweighs automotive reliability validation requirements |
| SAC7.5 | Same 7.5 V VWM but lower PPPM (400 W), smaller SOD-123FL package, higher RθJA (150 °C/W) | Lower surge margin and reduced thermal robustness; limited to low-energy consumer interfaces | Choose only for space-constrained PCBs where 400 W surge rating suffices and AEC-Q101 is not required |
Compared with SMBJ7.5CAHE3/5B, the SMBJ7.5CA-E3/5B offers identical electrical performance at lower cost but omits AEC-Q101 validation, while SAC7.5 trades surge capacity and thermal performance for footprint reduction - making SMBJ7.5CAHE3/5B optimal for automotive and high-reliability industrial deployments requiring full 600 W clamping and validated lifetime reliability.
Availability
SMBJ7.5CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power supply designs requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for SMBJ7.5CAHE3/5B 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 robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration: SMBJ7.5CAHE3/5B provides symmetrical clamping for both positive and negative transients, unlike unidirectional variants (e.g., SMBJ7.5A). This eliminates the need for polarity-aware placement and enables protection of AC-coupled or floating nodes - a key feature confirmed in Vishay's datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMBJ7.5CAHE3/5B qualified for automotive applications?
Yes, SMBJ7.5CAHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix per Vishay's ordering information table and mechanical data section. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - validating its use in automotive body control modules, infotainment systems, and ADAS sensor power domains.
What is the maximum clamping voltage of SMBJ7.5CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CAHE3/5B is 12.9 V at 46.5 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does SMBJ7.5CAHE3/5B differ from SMBJ7.5AHE3/5B?
SMBJ7.5CAHE3/5B is bidirectional with symmetrical clamping, while SMBJ7.5AHE3/5B is unidirectional and requires correct cathode orientation. The "CA" version has no polarity marking and supports ± transient suppression; the "A" version has a cathode band and only clamps positive transients (with forward conduction for negative excursions). Both share identical VWM (7.5 V), PPPM (600 W), and AEC-Q101 qualification.
What PCB pad layout is recommended for optimal thermal performance of SMBJ7.5CAHE3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for SMBJ7.5CAHE3/5B to achieve the rated RθJA of 100 °C/W. This layout is documented in the "MAXIMUM RATINGS" note (2) and Fig. 2 derating curve. Larger or thermally connected copper areas further reduce junction temperature during repetitive surge events.
SMBJ7.5CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 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)
SMBJ7.5CAHE3/5B FAQ
1.How can I place an order for SMBJ7.5CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHE3/5B 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 SMBJ7.5CAHE3/5B reliable?
The price and inventory of SMBJ7.5CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHE3/5B?
SMBJ7.5CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHE3/5B 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 SMBJ7.5CAHE3/5B?
For technical support, including SMBJ7.5CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ7.5CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHE3/5B 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 SMBJ7.5CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHE3/5B?
All SMBJ7.5CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHE3/5B, 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 SMBJ7.5CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHE3/5B Tags
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