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Vishay General Semiconductor - Diodes Division SMBJ7.5AHE3_B/H
- Part No.:
- SMBJ7.5AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHE3_B/H.pdf
- Description:
- 600W,7.5V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,587
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Product details
Overview
SMBJ7.5AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on DC power rails and signal lines. It features 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform).
For engineers reviewing the SMBJ7.5AHE3_B/H datasheet, SMBJ7.5AHE3_B/H pinout, SMBJ7.5AHE3_B/H application, or SMBJ7.5AHE3_B/H equivalent, this device is selected for robust overvoltage protection in automotive power supplies, industrial sensor interfaces, and telecom front-end circuits where low clamping voltage and AEC-Q101 qualification are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, with cathode-banded polarity and glass-passivated junction for stable breakdown behavior. Its 12.9 V clamping voltage at 46.5 A ensures effective suppression of 10/1000 µs surges while maintaining safe margin below downstream IC absolute maximum ratings.
Thermal resistance is rated at 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use - confirmed by HE3 suffix and ordering code "SMBJ7.5AHE3_B/H".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line's nominal DC voltage. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamping voltage under 10/1000 µs surge defines worst-case stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability determines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 100 µA max - Low reverse leakage preserves efficiency in battery-powered or high-impedance sensing circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height for automated assembly. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop when transient exceeds VBR. |
| Cathode | High-side connection point | Connected to protected line (e.g., 5 V rail); band-marked terminal carries reverse-biased voltage until clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and infotainment power rails. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to ±1 kV open-circuit / ±500 A short-circuit without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces with tight absolute maximum limits. |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; compatible with high-volume SMT lines using peak temperatures up to 260 °C. |
| Glass passivated junction | Ensures stable VBR over time and temperature, with low parameter drift versus epoxy-passivated alternatives. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs to body control modules (BCM) and lighting drivers from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive transients above 7.5 V. Use Value: 12.9 V clamping voltage ensures MCU and CAN transceivers remain within safe operating area during 35 V/100 ms load-dump events. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) and digital I/O of PLC analog input modules from field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on sensor signal lines to absorb induced transients from nearby motor switching or lightning coupling. Use Value: Sub-100 µA leakage at 7.5 V prevents measurement error in precision current-loop receivers; fast response avoids signal corruption. |
| Telecom Front-End Surge Suppression | Consumer USB Power Line Protection |
|
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and line-card LDOs against induced surges on RJ45 data pairs and bias rails. IC Role / Device Role / Timing Role: Unidirectional clamp on DC bias lines (e.g., 48 V PSE output) referenced to local ground plane. Use Value: 600 W rating handles multiple repetitions of IEC 61000-4-5 surges without thermal runaway; RoHS-compliant HE3 suffix supports global compliance. |
Use Scenario: Adding secondary overvoltage protection on 5 V USB VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Secondary TVS after primary fuse and common-mode choke, clamping fast ESD events before USB controller ICs. Use Value: 12.9 V VC provides >2 V margin below typical USB 5 V IC absolute max (e.g., 14 V), preventing latch-up or gate oxide damage. |
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 | Same electrical specs and SMB package; commercial-grade (non-AEC-Q101), RoHS-compliant only. | Lacks automotive qualification; suitable for consumer/industrial designs not requiring AEC-Q101 traceability. | Select when cost sensitivity outweighs automotive reliability requirements and no vehicle-level validation is needed. |
| SMBJ7.5CAHE3_B/H | Bidirectional variant with same VWM (7.5 V), but symmetrical clamping in both polarities; VBR min/max = 6.40–7.25 V. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where negative transients must also be suppressed. | Choose only if bidirectional protection is mandated; otherwise, unidirectional SMBJ7.5AHE3_B/H offers lower capacitance and tighter VBR tolerance. |
Compared with SMBJ7.5A-E3/52, SMBJ7.5AHE3_B/H adds AEC-Q101 qualification and full automotive traceability; compared with SMBJ7.5CAHE3_B/H, it provides optimized unidirectional clamping with higher VBR consistency and lower system-level leakage in DC-biased applications.
Availability
SMBJ7.5AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for SMBJ7.5AHE3_B/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, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and communications infrastructure where failure resilience is non-negotiable.
FAQ
What is the clamping voltage of SMBJ7.5AHE3_B/H at its rated peak pulse current?
The SMBJ7.5AHE3_B/H has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 46.5 A under the standardized 10/1000 µs waveform. This value is measured across the device terminals during transient suppression and defines the upper voltage limit imposed on the protected circuit during surge events. The SMBJ7.5AHE3_B/H maintains this clamping performance consistently due to its glass-passivated junction and AEC-Q101-validated construction.
Is SMBJ7.5AHE3_B/H suitable for automotive applications?
Yes, SMBJ7.5AHE3_B/H is explicitly AEC-Q101 qualified, as confirmed by the "HE3" suffix and ordering code documentation in the Vishay datasheet. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification to meet automotive reliability standards. The SMBJ7.5AHE3_B/H is deployed in engine control units, body electronics, and ADAS power supplies where sustained operation from –40 °C to +150 °C and immunity to load-dump transients are mandatory.
What does the "B/H" suffix in SMBJ7.5AHE3_B/H indicate?
The "B/H" suffix in SMBJ7.5AHE3_B/H denotes packaging configuration: "B" specifies the revision level (per Vishay's internal revision coding), and "H" indicates the preferred package code for 7″ diameter plastic tape-and-reel delivery with 750 units per reel. This matches the ordering information table in the datasheet and ensures compatibility with standard SMT pick-and-place equipment calibrated for SMB (DO-214AA) reels. The SMBJ7.5AHE3_B/H is supplied in this format with full traceability and RoHS compliance.
How does SMBJ7.5AHE3_B/H differ from bidirectional variants like SMBJ7.5CAHE3_B/H?
The SMBJ7.5AHE3_B/H is unidirectional, meaning it clamps only positive transients relative to its cathode-anode orientation, whereas SMBJ7.5CAHE3_B/H is bidirectional and suppresses surges of either polarity. Electrically, SMBJ7.5AHE3_B/H has a VBR range of 8.33–9.21 V and VC of 12.9 V, while SMBJ7.5CAHE3_B/H has lower VBR (6.40–7.25 V) and symmetric clamping. The SMBJ7.5AHE3_B/H is preferred for DC rails with defined polarity; SMBJ7.5CAHE3_B/H suits AC or floating differential lines like CAN or RS-485.
What is the maximum junction temperature rating for SMBJ7.5AHE3_B/H?
The SMBJ7.5AHE3_B/H has a maximum junction temperature (TJ max.) of +150 °C, as specified in the Vishay datasheet under "Maximum Ratings." This rating enables reliable operation in under-hood automotive locations, industrial motor drives, and enclosed telecom equipment where ambient temperatures exceed 100 °C. Derating curves in Figure 2 confirm usable power dissipation down to 50 % of rated PPPM at TJ = 125 °C, ensuring robustness in thermally constrained layouts.
SMBJ7.5AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.5AHE3_B/H FAQ
1.How can I place an order for SMBJ7.5AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHE3_B/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 SMBJ7.5AHE3_B/H reliable?
The price and inventory of SMBJ7.5AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHE3_B/H?
SMBJ7.5AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHE3_B/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 SMBJ7.5AHE3_B/H?
For technical support, including SMBJ7.5AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ7.5AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHE3_B/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 SMBJ7.5AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHE3_B/H?
All SMBJ7.5AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHE3_B/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 SMBJ7.5AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ7.5AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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