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Vishay General Semiconductor - Diodes Division SMBJ75AHE3/52
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- Part No.:
- SMBJ75AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHE3/52.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,335
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Product details
Overview
SMBJ75AHE3/52 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, and clamps transients to ≤121 V at 5.0 A peak pulse current (IPPM), delivering 600 W peak pulse power with a 10/1000 µs waveform - ideal for safeguarding MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMBJ75AHE3/52 datasheet, SMBJ75AHE3/52 pinout, SMBJ75AHE3/52 application, or SMBJ75AHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification (HE3 suffix), low incremental surge resistance, fast response time (<1 ns), and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This TVS diode operates as a unidirectional clamping device: under normal conditions it presents high impedance above 75 V reverse stand-off voltage; when exposed to transient overvoltage exceeding its breakdown threshold (83.3–92.1 V), it avalanches rapidly to limit the voltage across protected circuitry to ≤121 V. Its glass-passivated junction ensures stable performance and reliability across temperature extremes.
The SMBJ75AHE3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports continuous power dissipation of 5.0 W at TA = 50 °C, and maintains operation across -55 °C to +150 °C junction temperature range - meeting MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail protection margin. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation under ESD/EFT stress. |
| VC @ IPPM | ≤121 V at 5.0 A (10/1000 µs) - Clamped voltage during worst-case surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of power converters subject to load dump events. |
| TJ max. | +150 °C - Maximum junction temperature; allows reliable operation in enclosed industrial enclosures without forced cooling. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on 0.2" × 0.2" copper pads; informs thermal design for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA) - Surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 75 V rail); avalanches into conduction when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability (temperature cycling, HTRB, UHAST); suitable for under-hood ECUs and ADAS power stages. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5; eliminates need for external series impedance in many designs. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over 10+ years; critical for long-life industrial equipment. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; reduces manufacturing complexity and cost. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during clamping; protects sensitive gate oxides in 75 V-rated MOSFETs and controllers. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 72–80 V DC input rails in programmable logic controller (PLC) power modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input rail and chassis ground to shunt surge energy away from upstream DC/DC controllers and downstream LDOs. Use Value: Limits transient voltage to ≤121 V, preventing latch-up or gate oxide rupture in 100 V-rated buck controllers and ensuring system-level immunity to ISO 16750-2 Pulse 5a/b. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins in BCMs exposed to battery voltage spikes during alternator regulation faults. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN line and ground, leveraging 75 V VWM to tolerate normal battery swings while clamping >90 V transients. Use Value: Enables compliance with ISO 16750-2 and SAE J1113-11 via sub-121 V clamping at 5 A, preserving signal integrity without adding series resistance or delay. |
| Telecom DC Feeder Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Shielding 48–75 V DC power feeds in remote radio head (RRH) base stations from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, coordinated with upstream MOVs and downstream fuses to meet ITU-T K.20/K.21 immunity requirements. Use Value: Provides <1 ns response and 600 W pulse handling to absorb multi-kV surges without degradation, extending field service life beyond 15 years. |
Use Scenario: Protecting high-side gate drivers in 75 V BLDC motor inverters from shoot-through-inducing voltage spikes during PWM switching transitions. IC Role / Device Role / Timing Role: Localized TVS mounted directly at gate driver output, clamping Miller-induced spikes before they reach MOSFET gates. Use Value: Maintains VGS within ±20 V safe operating area by limiting overshoot to ≤121 V, reducing false triggering and improving inverter reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM, identical SMB package and pinout. | Lacks automotive qualification; unsuitable for safety-critical vehicle systems but adequate for consumer/industrial power supplies. | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs. |
| SMBJ75CAHE3/52 | Bidirectional variant: symmetric VBR (83.3–92.1 V), same VC and PPPM, but no polarity marking and higher ID at low VWM. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD); cannot replace unidirectional SMBJ75AHE3/52 on DC rails without circuit review. | Choose only for differential or alternating polarity protection; verify absence of forward conduction paths in target circuit. |
Compared with SMBJ75A-E3/52, the SMBJ75AHE3/52 adds AEC-Q101 validation for automotive use without sacrificing electrical specs; versus SMBJ75CAHE3/52, it provides directional clamping essential for DC rail protection, avoiding unintended conduction during normal operation.
Availability
SMBJ75AHE3/52 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom DC feeders, and motor drive gate driver protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ75AHE3/52 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and high-power handling.
The SMBJ series was engineered specifically for surface-mount transient suppression in harsh environments - balancing high pulse power, tight VBR tolerance, and automotive-grade process control for mission-critical electronics.
FAQ
What is the breakdown voltage range of SMBJ75AHE3/52?
The SMBJ75AHE3/52 has a guaranteed breakdown voltage (VBR) range of 83.3 V to 92.1 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This range ensures consistent clamping behavior across production lots and supports robust design margins for 75 V DC systems. The SMBJ75AHE3/52 meets this specification under standard test conditions defined in Vishay document 88392.
Is SMBJ75AHE3/52 suitable for automotive applications?
Yes, SMBJ75AHE3/52 is AEC-Q101 qualified, with full validation for temperature cycling, highly accelerated stress testing (HAST), and unbiased highly accelerated stress testing (UHAST). Its HE3 suffix explicitly denotes automotive-grade qualification, making it appropriate for under-hood and chassis-mounted modules where reliability under thermal and mechanical stress is mandatory. The SMBJ75AHE3/52 complies with all applicable AEC-Q101 test conditions per Vishay's certification documentation.
What is the maximum clamping voltage of SMBJ75AHE3/52 at rated surge current?
The SMBJ75AHE3/52 clamps to a maximum of 121 V when subjected to its rated 5.0 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This clamping voltage is measured under controlled conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75AHE3/52 maintains this performance across its full operating temperature range.
Does SMBJ75AHE3/52 have a specified junction-to-ambient thermal resistance?
Yes, the SMBJ75AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value is critical for calculating steady-state temperature rise under continuous power dissipation and must be used with the 5.0 W power rating at TA = 50 °C. The SMBJ75AHE3/52 thermal performance is validated per JEDEC JESD51-2.
How does the SMBJ75AHE3/52 differ from the bidirectional SMBJ75CAHE3/52?
The SMBJ75AHE3/52 is unidirectional with a marked cathode band and blocks current in reverse bias up to 75 V, while the SMBJ75CAHE3/52 is bidirectional with symmetrical clamping in both directions and no polarity marking. Their VBR, VC, and PPPM values are identical, but the SMBJ75AHE3/52 cannot substitute for the CA version in AC or differential signal paths without risking forward conduction. The SMBJ75AHE3/52 is intended exclusively for DC rail protection.
SMBJ75AHE3/52 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ75AHE3/52 FAQ
1.How can I place an order for SMBJ75AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHE3/52 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 SMBJ75AHE3/52 reliable?
The price and inventory of SMBJ75AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ75AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHE3/52?
SMBJ75AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHE3/52 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 SMBJ75AHE3/52?
For technical support, including SMBJ75AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHE3/52 requirements.
6.How does Aetrix verify that SMBJ75AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHE3/52 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 SMBJ75AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ75AHE3/52?
All SMBJ75AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHE3/52, 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 SMBJ75AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ75AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHE3/52 Tags
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