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Vishay General Semiconductor - Diodes Division SMBJ75AHE3/5B
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- Part No.:
- SMBJ75AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHE3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,570
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Product details
Overview
SMBJ75AHE3/5B 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 sensor interfaces, and telecom power supplies.
For engineers reviewing the SMBJ75AHE3/5B datasheet, SMBJ75AHE3/5B pinout, SMBJ75AHE3/5B application, or SMBJ75AHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and packaging details for tape-and-reel delivery (3200 pcs per 13″ reel).
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with ≤1.0 µA leakage at 75 V, then rapidly avalanches when transient voltage exceeds VBR to limit downstream voltage to ≤121 V. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Designed for high-reliability environments, SMBJ75AHE3/5B meets AEC-Q101 stress test requirements and is rated for 150 °C maximum junction temperature. It uses a single-diode configuration in SMB package with cathode band marking, compatible with automated SMT placement and reflow profiles up to 260 °C (MSL Level 1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 83.3 V / 92.1 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on under transients. |
| VC @ IPPM | 121 V at 5.0 A - Clamped voltage during 600 W 10/1000 µs surge; determines protected circuit's max stress level. |
| PPPM | 600 W - Peak pulse power handling capability; validates immunity to common lightning/inductive-switching surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current events. |
| TJ range | −55 °C to +150 °C - Full operational junction temperature span; enables use in under-hood automotive or industrial enclosures. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2″ × 0.2″ copper pads; informs PCB thermal design. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration. |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., 75 V supply rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing - suitable for engine control, ADAS, and body electronics. |
| 600 W peak pulse power | Withstands 10/1000 µs transients up to 5.0 A without degradation - meets IEC 61000-4-5 Level 3 (1 kV surge) requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA at VWM) across temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Compatible with standard SMT reflow without baking; peak temperature rating of 260 °C per J-STD-020. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during clamping - critical for protecting 75 V-rated MOSFETs and gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 75 V battery-fed control modules (e.g., HVAC actuators, seat motor drivers) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground to clamp positive transients above 75 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤121 V, preventing latch-up or oxide damage. |
Use Scenario: Safeguarding analog front-end inputs of 4–20 mA current-loop sensors in factory automation systems exposed to relay switching noise. IC Role / Device Role / Timing Role: TVS mounted across sensor input terminals to shunt fast-rising EFT bursts (IEC 61000-4-4) before reaching ADC inputs. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <1 pF junction capacitance at zero bias. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Secondary-side overvoltage suppression on −48 V or +75 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-rail to absorb repetitive surges from AC line coupling. Use Value: Withstands 600 W pulses at 0.01% duty cycle - enabling long-term operation in continuously powered infrastructure equipment. |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in BLDC inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: TVS placed between gate and source to clamp dv/dt-induced overshoot exceeding driver IC's absolute max rating. Use Value: Fast response and low clamping voltage (121 V) prevent unintended turn-on or gate oxide failure in 100 V-class MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHM3/5B | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected where halogen-free compliance is mandated by environmental policy (e.g., EU RoHS Annex XIV). | Choose SMBJ75AHM3/5B when halogen-free materials are required; otherwise SMBJ75AHE3/5B offers standard RoHS compliance. |
| SMCJ75AHE3/5B | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and lower RθJA (50 °C/W). | Used where higher surge energy absorption or improved thermal dissipation is needed - e.g., primary-side AC/DC input stages. | Select SMCJ75AHE3/5B only if system-level surge testing exceeds 600 W; SMBJ75AHE3/5B remains optimal for space-constrained secondary-side protection. |
Compared with SMBJ75AHM3/5B, SMBJ75AHE3/5B provides identical protection performance with standard RoHS compliance; versus SMCJ75AHE3/5B, it trades higher power handling for 40% smaller PCB footprint and tighter layout integration in dense automotive modules.
Availability
SMBJ75AHE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply, AEC-Q101 qualification, and consistent tape-and-reel delivery.
Supply support for SMBJ75AHE3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness and repeatable clamping performance are non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ75AHE3/5B at its rated peak pulse current?
The SMBJ75AHE3/5B has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ75AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ75AHE3/5B qualified for automotive applications?
Yes, SMBJ75AHE3/5B is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and electrostatic discharge (ESD). This qualification confirms its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical. The "HE3" suffix explicitly denotes AEC-Q101 compliance.
What does the "5B" in SMBJ75AHE3/5B indicate?
The "5B" in SMBJ75AHE3/5B specifies the packaging format: 13-inch diameter plastic tape-and-reel with 3200 units per reel. This differs from "52", which denotes a 7-inch reel with 750 units. The "5B" configuration supports high-volume SMT assembly lines and reduces changeover frequency during automated placement. All electrical and reliability specifications of SMBJ75AHE3/5B remain identical regardless of reel size.
How does SMBJ75AHE3/5B differ from bidirectional variants like SMBJ75CAHE3/5B?
SMBJ75AHE3/5B is unidirectional and features a cathode band marking; it conducts only in reverse breakdown to clamp positive transients on DC rails. In contrast, SMBJ75CAHE3/5B is bidirectional with no polarity marking and clamps both positive and negative excursions - used in AC-coupled or floating signal lines. Their VWM and VC values differ: SMBJ75AHE3/5B has VWM = 75 V and VC = 121 V, while SMBJ75CAHE3/5B has symmetric ratings optimized for bipolar waveforms.
What is the thermal resistance of SMBJ75AHE3/5B, and how does it affect PCB layout?
The SMBJ75AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board construction and guides minimum pad area and copper pour design. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise - especially in sealed automotive enclosures.
SMBJ75AHE3/5B 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:
- 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)
SMBJ75AHE3/5B FAQ
1.How can I place an order for SMBJ75AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHE3/5B 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 SMBJ75AHE3/5B reliable?
The price and inventory of SMBJ75AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHE3/5B?
SMBJ75AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHE3/5B 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 SMBJ75AHE3/5B?
For technical support, including SMBJ75AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHE3/5B requirements.
6.How does Aetrix verify that SMBJ75AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHE3/5B 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 SMBJ75AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75AHE3/5B?
All SMBJ75AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHE3/5B, 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 SMBJ75AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ75AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHE3/5B Tags
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