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Vishay General Semiconductor - Diodes Division SMBJ75AHE3_B/I
- Part No.:
- SMBJ75AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHE3_B/I.pdf
- Description:
- 600W,75V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,095
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Product details
Overview
SMBJ75AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 5.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMBJ75AHE3_B/I datasheet, SMBJ75AHE3_B/I pinout, SMBJ75AHE3_B/I application, or SMBJ75AHE3_B/I equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast sub-nanosecond response time, and compatibility with automated SMT assembly on standard PCB pad layouts per JESD22-B102 and J-STD-002.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation, it remains high-impedance until transient voltage exceeds VBR, then avalanches to limit voltage across protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance under repetitive surges.
Thermally, it exhibits RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing per AEC-Q101 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe DC rail margin for 12 V/24 V/48 V systems. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1.0 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and unit-to-unit variation. |
| VC @ IPPM | 121 V at 5.0 A (10/1000 µs) - Clamping voltage directly limits stress on downstream MOSFETs, regulators, or microcontrollers during ESD/EFT events. |
| PPPM | 600 W - Peak pulse power handling capability supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity without degradation. |
| IFSM | 100 A (8.3 ms half-sine) - Withstands high-energy inrush or fault currents without bond-wire fusing. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMB (DO-214AA) - Industry-standard 2-pin SMD footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, MSL Level 1 (260 °C reflow peak), JESD201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; establishes reference for clamping action during transients. |
| Cathode | Protected line input | Connected to line being protected (e.g., 24 V supply rail); avalanche conduction occurs from cathode to anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress test requirements for temperature cycling, HAST, and mechanical shock. |
| 600 W peak pulse power (10/1000 µs) | Supports full IEC 61000-4-5 surge immunity testing at Level 4 without derating or parallel devices. |
| Clamping ratio VC/VBR ≈ 1.31 | Low clamping ratio minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected ICs. |
| 1.0 µA max reverse leakage @ VWM | Negligible standby power loss in battery-powered systems and avoids false triggering in high-impedance sensing circuits. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - critical for 15+ year automotive lifetimes. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between fused 24 V rail and DC/DC converter input. Use Value: Limits transient voltage to ≤121 V, preventing damage to 36 V-rated input capacitors and LDO regulators while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field wiring surges and ESD from operator contact. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at connector entry point, upstream of optocoupler or Schmitt trigger input stage. Use Value: Absorbs 600 W pulses without degradation, ensuring >100,000 surge cycles and eliminating need for external series impedance or RC filtering. |
| Telecom DC Power Feeding | Motor Drive Gate Driver Protection |
|
Use Scenario: Securing -48 V DC feeding lines in remote radio units (RRUs) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Reverse-polarity TVS connected cathode-to-line to clamp negative-going transients on telecom power bus. Use Value: 121 V clamping voltage maintains safe margin below -48 V system's absolute maximum rating of -100 V, meeting GR-1089-CORE requirements. |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in BLDC motor inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Localized TVS placed between gate and source terminals to clamp dv/dt-induced overshoot exceeding VGS(max). Use Value: Sub-nanosecond response captures fast-rising gate spikes before they exceed ±20 V VGS limit, preventing gate oxide rupture in 650 V SiC drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHM3_B/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs but different material composition. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy (e.g., VW 80101). | Direct drop-in replacement for SMBJ75AHE3_B/I in halogen-free BOMs; same footprint, thermal profile, and surge rating. |
| SMBJ75A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, but rated only for TJ = -55 to +125 °C and lacks automotive qualification testing. | Suitable for non-automotive industrial or consumer applications where extended temperature range and automotive reliability are not required. | Lower-cost option for non-automotive designs; requires revalidation if migrating from SMBJ75AHE3_B/I to commercial grade. |
Compared with SMBJ75AHM3_B/I, SMBJ75AHE3_B/I offers identical surge performance but uses standard RoHS-compliant materials instead of halogen-free compounds; compared with SMBJ75A-E3/5B, SMBJ75AHE3_B/I adds AEC-Q101 qualification, extended junction temperature range (+150 °C), and automotive-grade reliability validation - essential for safety-critical vehicle subsystems.
Availability
SMBJ75AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power feeding systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ75AHE3_B/I 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 high-reliability, high-efficiency, and automotive-grade solutions.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience and long-term parametric stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ75AHE3_B/I under a 10/1000 µs surge?
The SMBJ75AHE3_B/I has a maximum clamping voltage (VC) of 121 V when subjected to a 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry will not experience voltages exceeding 121 V during standardized surge events - a key parameter for validating compliance with IEC 61000-4-5 Level 4.
Is SMBJ75AHE3_B/I qualified for automotive applications?
Yes, SMBJ75AHE3_B/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature operating life, and mechanical shock - specifically validated for use in automotive powertrain, chassis, and body electronics. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified status per Vishay's ordering nomenclature.
What is the reverse leakage current specification for SMBJ75AHE3_B/I at its rated stand-off voltage?
At VWM = 75 V and TA = 25 °C, the SMBJ75AHE3_B/I exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power loss in always-on systems and prevents interference in high-impedance sensor interfaces or battery-backed circuits where standby current budget is tightly constrained.
Does SMBJ75AHE3_B/I have a defined polarity marking, and how is it identified?
Yes, SMBJ75AHE3_B/I is unidirectional and features a visible cathode band on the SMB (DO-214AA) package body. The banded end corresponds to the cathode terminal, which must be connected toward the line being protected (e.g., +24 V rail), while the anode connects to ground or return path - correct orientation is essential for proper clamping function and surge energy diversion.
What is the thermal resistance from junction to ambient for SMBJ75AHE3_B/I, and how does it affect layout design?
The SMBJ75AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ +150 °C under worst-case 5.0 W steady-state dissipation, PCB layout must include adequate copper area and avoid thermal bottlenecks - especially critical in sealed automotive enclosures with limited airflow.
SMBJ75AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 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)
SMBJ75AHE3_B/I FAQ
1.How can I place an order for SMBJ75AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHE3_B/I 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 SMBJ75AHE3_B/I reliable?
The price and inventory of SMBJ75AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ75AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHE3_B/I?
SMBJ75AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHE3_B/I 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 SMBJ75AHE3_B/I?
For technical support, including SMBJ75AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ75AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHE3_B/I 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 SMBJ75AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ75AHE3_B/I?
All SMBJ75AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHE3_B/I, 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 SMBJ75AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ75AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHE3_B/I Tags
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