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Vishay General Semiconductor - Diodes Division SMBJ7.5AHE3/52
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- Part No.:
- SMBJ7.5AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,989
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Product details
Overview
SMBJ7.5AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage at 1 mA, 12.9 V maximum clamping voltage at 46.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive body control modules, industrial sensor interfaces, and USB power input stages.
For engineers reviewing the SMBJ7.5AHE3/52 datasheet, SMBJ7.5AHE3/52 pinout, SMBJ7.5AHE3/52 application, or SMBJ7.5AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, SMB (DO-214AA) package thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100 µA at 7.5 V), while the 10/1000 µs surge rating reflects standardized lightning and switching transient immunity per ANSI/IEEE C62.35.
The SMBJ7.5AHE3/52 variant carries the HE3 suffix, confirming RoHS-compliance and AEC-Q101 qualification for automotive applications. Its cathode-band marking aligns with unidirectional polarity, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before significant conduction begins; sets minimum system rail margin for reliable standby operation. |
| VBR @ IT = 1 mA | 8.33–9.21 V - Verified breakdown range under standardized test current; defines threshold for clamping activation in transient events. |
| VC @ IPPM = 46.5 A | 12.9 V - Clamped voltage during 600 W surge; determines maximum stress imposed on downstream ICs during ESD or load-dump transients. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports robust protection against IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables survivability during high-energy inductive turn-off events. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with appropriate PCB thermal design. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or lower-potential rail; establishes reference for clamping action during overvoltage events. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 12 V supply or CAN_H); conducts surge current to ground when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for body electronics and infotainment power rails. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation; eliminates need for external series impedance in many 12 V systems. |
| Low clamping ratio (VC/VWM ≈ 1.72) | Minimizes voltage overshoot during clamping - critical for protecting 5 V or 3.3 V logic interfaces powered from regulated 12 V supplies. |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and industrial surge protectors - simplifies end-equipment safety certification. |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Sensor Node |
|---|---|
|
Use Scenario: Protects 12 V power input of BCM microcontroller and CAN transceiver from load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed directly across input rail, upstream of DC-DC converter. Use Value: Limits rail voltage to ≤12.9 V during 46.5 A surge, preventing latch-up or gate oxide damage in downstream regulators and interface ICs. |
Use Scenario: Shields RS-485 transceiver data lines from EFT bursts and field-wiring induced surges in factory automation networks. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on A/B lines referenced to local ground plane. Use Value: Clamps differential transients within 1 ns response time while maintaining <100 µA leakage at 7.5 V, preserving bus bias integrity. |
| USB-C Power Delivery Input Stage | Smart Home Hub 5 V Rail Protection |
|
Use Scenario: Guards 5 V VBUS line against hot-plug overshoot and adapter fault conditions in USB-C PD sink designs. IC Role / Device Role / Timing Role: Primary overvoltage clamp between VBUS and GND, sized for 600 W single-event surge. Use Value: Prevents damage to USB PD controller and port protection switches by limiting VBUS to 12.9 V during 46.5 A transient. |
Use Scenario: Secures 5 V system rail in Wi-Fi-enabled smart thermostat against AC-coupled surges from shared building wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on main 5 V distribution net, adjacent to PMIC input capacitor. Use Value: Maintains 7.5 V standoff while delivering 12.9 V clamping - compatible with 5.5 V absolute maximum ratings of common PMICs and SoCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-E3/52 | Commercial-grade version; lacks AEC-Q101 qualification and UL 497B recognition. | Approved for consumer and industrial equipment only; not permitted in automotive production. | Select when cost sensitivity outweighs automotive qualification requirements and UL listing is unnecessary. |
| SMCJ7.5AHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 100 °C/W. | Higher thermal mass supports higher average surge duty cycles; requires larger PCB footprint. | Choose for applications with repetitive surge exposure or elevated ambient temperatures where SMB thermal limits are exceeded. |
Compared with SMBJ7.5AHE3/52, the E3/52 variant trades automotive qualification for lower cost, while the SMCJ7.5AHE3/52 offers superior thermal performance at the expense of board space - enabling optimized trade-offs between reliability, footprint, and qualification scope.
Availability
SMBJ7.5AHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power delivery inputs, and smart home hub power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ7.5AHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series delivers AEC-Q101-qualified transient suppression for automotive and industrial power rails, engineered to meet stringent surge immunity standards while supporting automated SMT assembly and long-term supply stability.
FAQ
What is the clamping voltage of SMBJ7.5AHE3/52 at its rated peak pulse current?
The SMBJ7.5AHE3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 46.5 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ7.5AHE3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMBJ7.5AHE3/52 suitable for automotive applications?
Yes, SMBJ7.5AHE3/52 is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliance and automotive-grade reliability testing. It is approved for use in body control modules, infotainment power supplies, and sensor interfaces where load-dump and ISO 7637-2 transient immunity are required. The SMBJ7.5AHE3/52 meets UL 497B recognition for surge protector classification.
What does the "HE3" suffix indicate in SMBJ7.5AHE3/52?
The "HE3" suffix in SMBJ7.5AHE3/52 specifies RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants like SMBJ7.5A-E3/52. It also indicates compliance with JESD 201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity rating for lead-free reflow. The SMBJ7.5AHE3/52 is intended for automotive and high-reliability industrial deployments.
How does SMBJ7.5AHE3/52 differ from bidirectional TVS diodes like SMBJ7.5CA?
The SMBJ7.5AHE3/52 is unidirectional and features a cathode band marking; it blocks forward current and clamps only in reverse bias. In contrast, SMBJ7.5CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The SMBJ7.5AHE3/52 is used where DC polarity is fixed (e.g., 12 V rails), while SMBJ7.5CA suits AC-coupled or differential signal lines like RS-485.
What is the maximum operating temperature for SMBJ7.5AHE3/52?
The SMBJ7.5AHE3/52 has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. Its thermal resistance (RθJA) is 100 °C/W on standard 0.2" × 0.2" copper pads, requiring derating above 25 °C ambient per Figure 2 in the datasheet. The SMBJ7.5AHE3/52 sustains full surge ratings up to TJ = 125 °C with appropriate PCB thermal design.
SMBJ7.5AHE3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ7.5AHE3/52 FAQ
1.How can I place an order for SMBJ7.5AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHE3/52 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 SMBJ7.5AHE3/52 reliable?
The price and inventory of SMBJ7.5AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHE3/52?
SMBJ7.5AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHE3/52 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 SMBJ7.5AHE3/52?
For technical support, including SMBJ7.5AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHE3/52 requirements.
6.How does Aetrix verify that SMBJ7.5AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHE3/52 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 SMBJ7.5AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHE3/52?
All SMBJ7.5AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHE3/52, 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 SMBJ7.5AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHE3/52 Tags
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