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Vishay General Semiconductor - Diodes Division SMBJ75AHM3/H
- Part No.:
- SMBJ75AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,748
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Product details
Overview
SMBJ75AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ75AHM3/H datasheet, SMBJ75AHM3/H pinout, SMBJ75AHM3/H application, or SMBJ75AHM3/H equivalent, this part delivers verified transient suppression for 75 V DC systems with halogen-free, RoHS-compliant construction, AEC-Q101 qualification readiness, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and load-dump protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR range (83.3–92.1 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of inductive switching spikes and lightning-induced surges on 75 V supply rails.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device uses glass-passivated silicon junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for safe DC rail operation. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 121 V at 5.0 A - Clamped voltage under 10/1000 µs surge; defines worst-case voltage seen by protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against repetitive transients at 0.01% duty cycle. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates survivability during high-energy fault conditions. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-temperature industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, single-ended unidirectional configuration. Cathode marked by band on body; anode is unmarked end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line (e.g., 75 V rail); conducts avalanche current to ground during overvoltage. |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients without degradation in 75 V power systems. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for automotive and industrial OEM production. |
| AEC-Q101 qualification ready (HM3 variant) | Supports automotive-grade reliability validation for engine control, ADAS power rails, and infotainment subsystems. |
| MSL Level 1 (JEDEC J-STD-020) | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1.0 µA at VWM) across temperature and lifetime. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 75 V auxiliary power rails in programmable logic controllers (PLCs) and motor drives from inductive kickback and EFT. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and ground to limit transient voltage to ≤121 V during 600 W surges. Use Value: Prevents latch-up or permanent damage to 75 V-rated DC-DC controllers and gate drivers during field wiring faults. |
Use Scenario: Safeguarding LIN bus interface and microcontroller I/O in BCM modules exposed to battery load dump per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across 75 V supply inputs to absorb 121 V clamped energy within 10/1000 µs window. Use Value: Maintains functional safety integrity by limiting voltage stress on 3.3 V/5 V LDOs and CAN/LIN transceivers downstream. |
| Telecom Remote Radio Unit (RRU) | Renewable Energy Charge Controller |
|
Use Scenario: Shielding 75 V DC power input of outdoor RRU enclosures from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input stage, coordinated with upstream MOVs and downstream filtering. Use Value: Achieves IEC 61000-4-5 Level 4 immunity (4 kV line-earth) while maintaining <1 µA leakage at 75 V nominal. |
Use Scenario: Protecting MPPT controller inputs connected to 72 V solar string outputs against reverse polarity and surge events. IC Role / Device Role / Timing Role: Unidirectional clamp on PV+ line referenced to chassis ground, sized for 100 A IFSM fault tolerance. Use Value: Extends system uptime by preventing catastrophic failure during grid-switching transients or grounding anomalies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHE3/H | Same electrical specs, but RoHS-compliant with lead-free solder finish only (no halogen-free requirement); lacks HM3's halogen-free certification. | Acceptable for commercial/industrial use where halogen-free is not mandated; not qualified for automotive AEC-Q101. | Select when cost optimization is prioritized and halogen-free compliance is not required by end-customer specification. |
| SMCJ75A-H | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC; 2.5× higher surge current rating (12.3 A vs. 5.0 A). | Better suited for high-energy environments (e.g., traction inverters); requires PCB layout change due to larger footprint. | Choose when system-level surge testing exceeds 600 W or when longer transient duration demands higher IPPM. |
Compared with SMBJ75AHM3/H, SMBJ75AHE3/H offers identical clamping performance without halogen-free assurance, while SMCJ75A-H provides higher surge margin at the cost of board space and thermal mass - making SMBJ75AHM3/H optimal for space-constrained, automotive-qualified 75 V rail protection.
Availability
SMBJ75AHM3/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and renewable energy charge controllers requiring stable component supply with halogen-free and AEC-Q101-ready construction.
Supply support for SMBJ75AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for robust transient voltage suppression in harsh environments - targeting automotive, industrial, and telecom applications where precise clamping, low leakage, and long-term stability are essential.
FAQ
What is the maximum clamping voltage of SMBJ75AHM3/H under a 10/1000 µs surge?
The SMBJ75AHM3/H 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 standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ75AHM3/H maintains this clamping performance consistently across its rated operating temperature range.
Is SMBJ75AHM3/H qualified to AEC-Q101?
The SMBJ75AHM3/H carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed in Vishay's ordering information and mechanical data tables. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. SMBJ75AHM3/H is intended for automotive applications such as body control modules and infotainment power rails where reliability under thermal and vibration stress is mandatory.
What does the "H" in SMBJ75AHM3/H signify?
The "H" in SMBJ75AHM3/H denotes the preferred package code for 7" diameter plastic tape and reel delivery, containing 750 units per reel. This packaging format is optimized for high-speed SMT placement equipment and aligns with industry-standard feeder compatibility. The full ordering code SMBJ75AHM3/H reflects halogen-free (HM3) construction plus the H-tape/reel configuration - distinct from "I" (13" reel, 3200 units) or "B" (bulk) variants.
How does SMBJ75AHM3/H compare to bidirectional TVS diodes like SMBJ75CA?
SMBJ75AHM3/H is unidirectional and intended for DC rail protection with polarity-sensitive placement (cathode to line), whereas SMBJ75CA is bidirectional and symmetric - suitable for AC lines or differential signal protection. The SMBJ75AHM3/H exhibits lower leakage (<1.0 µA at 75 V) and higher surge current capability in forward conduction mode (IFSM = 100 A), but cannot suppress negative-going transients without external circuitry. Use SMBJ75AHM3/H where polarity is fixed and forward conduction margin matters.
What is the thermal resistance of SMBJ75AHM3/H, and how does it affect PCB layout?
SMBJ75AHM3/H 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 - as specified in Vishay's datasheet. To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise. Increasing pad size or adding thermal vias reduces RθJA, directly improving surge endurance and long-term reliability of the SMBJ75AHM3/H in high-power transient scenarios.
SMBJ75AHM3/H 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:
- 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)
SMBJ75AHM3/H FAQ
1.How can I place an order for SMBJ75AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3/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 SMBJ75AHM3/H reliable?
The price and inventory of SMBJ75AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3/H?
SMBJ75AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3/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 SMBJ75AHM3/H?
For technical support, including SMBJ75AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3/H requirements.
6.How does Aetrix verify that SMBJ75AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3/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 SMBJ75AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3/H?
All SMBJ75AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3/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 SMBJ75AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ75AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3/H Tags
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