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Vishay General Semiconductor - Diodes Division SMBJ75AHM3/I
- Part No.:
- SMBJ75AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,126
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Product details
Overview
SMBJ75AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 75 V standoff 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 industrial motor drives, automotive body control modules, and DC power input stages.
For engineers reviewing the SMBJ75AHM3/I datasheet, SMBJ75AHM3/I pinout, SMBJ75AHM3/I application, or SMBJ75AHM3/I equivalent, this device is selected for high-energy surge immunity in 24 V–48 V DC systems where low clamping ratio, AEC-Q101 qualification, and halogen-free RoHS compliance are mandatory design requirements.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 µA leakage at 75 V, then rapidly avalanches when transient voltage exceeds its 83.3 V minimum breakdown threshold. Its 121 V clamping voltage at 5.0 A ensures downstream ICs (e.g., MCU power rails or CAN transceivers) remain below absolute maximum ratings during IEC 61000-4-5 Level 3 surges.
Constructed with a glass-passivated silicon junction in an SMB (DO-214AA) package, SMBJ75AHM3/I delivers 100 °C/W junction-to-ambient thermal resistance and supports 100 A non-repetitive forward surge current (8.3 ms half-sine). The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's nominal DC rail. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1 mA - Confirmed avalanche initiation range; guarantees reliable triggering above system overvoltage thresholds. |
| VC (Clamping Voltage) | 121 V at 5.0 A (10/1000 µs) - Measured peak voltage across device during surge; determines actual stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability per transient event; validates suitability for IEC 61000-4-5 4 kV surge testing. |
| IPPM (Peak Pulse Current) | 5.0 A - Corresponding surge current at VC; used with PCB trace impedance to estimate let-through energy. |
| TJmax | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest-potential node in unidirectional clamp configuration; defines current return path during avalanche conduction. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V supply rail); carries full surge current into ground via anode during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - meets stress test requirements for temperature cycling, HTRB, and mechanical shock. |
| Halogen-free & RoHS-compliant (HM3) | Meets IPC-1752A material declaration standards and EU RoHS Directive 2011/65/EU - required for Tier 1 automotive and green industrial OEMs. |
| 600 W peak pulse power (10/1000 µs) | Supports repeated surge events up to 0.01% duty cycle without degradation - sufficient for motor drive commutation spikes and relay coil flyback. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during transients - critical for protecting 75 V-rated MOSFETs and 100 V-input DC-DC controllers. |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free soldering without moisture sensitivity concerns - eliminates pre-bake requirement in high-volume SMT lines. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motor commutation and contactor switching. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between bus rail and chassis ground to clamp transients within 1 ns response time. Use Value: Limits voltage excursions to ≤121 V, preventing gate oxide rupture in 100 V MOSFETs and ensuring uninterrupted microcontroller operation. |
Use Scenario: Input protection for LIN bus transceivers and power window control ICs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V battery feed line, activated before internal LDOs or ESD diodes fail. Use Value: Withstands 100 A surge (8.3 ms) and maintains <1 µA leakage at 13.5 V - preserves sleep-mode current budget while surviving ISO 16750-2 pulses. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Secondary-side DC output protection in 48 V PoE-powered switches and base station RF amplifiers. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 48 V output rail, coordinated with upstream MOVs and fuses. Use Value: 600 W rating absorbs residual surge energy after primary suppression, reducing failure rate of PMICs and Ethernet PHYs by >90% in field deployments. |
Use Scenario: Surge protection on AC/DC adapter input and microcontroller I/O lines in smart washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional clamp on 24 V auxiliary supply feeding solenoid drivers and sensor interfaces. Use Value: Halogen-free HM3 construction satisfies IEC 62368-1 flame-retardancy and environmental compliance for global retail certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHE3/I | Same electrical specs and SMB package, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Approved for commercial/industrial use; not certified for automotive AEC-Q101 or halogen-free mandates. | Select when AEC-Q101 and halogen-free requirements are absent; lower cost alternative for non-automotive designs. |
| SMCJ75A-M3/5B | Higher 1500 W PPPM, larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), same VWM/VC ratings. | Used where higher surge margin is needed (e.g., outdoor telecom cabinets), but requires PCB layout change. | Choose when system-level surge testing exceeds 600 W; verify pad layout compatibility and thermal derating at 100 °C/W. |
Compared with SMBJ75AHM3/I, SMBJ75AHE3/I offers identical protection performance without halogen-free or AEC-Q101 validation, while SMCJ75A-M3/5B provides double the surge power in a physically larger package - requiring layout revision but enabling higher reliability in harsh environments.
Availability
SMBJ75AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMBJ75AHM3/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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The SMBJ series was developed specifically for high-energy transient suppression in space-constrained surface-mount applications across automotive, industrial, and communications infrastructure - prioritizing low clamping voltage, fast response, and process-controlled consistency.
FAQ
What is the maximum clamping voltage of SMBJ75AHM3/I at its rated peak pulse current?
The SMBJ75AHM3/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 under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components like 100 V MOSFETs remain within safe operating area. The SMBJ75AHM3/I consistently achieves this clamping performance across its qualified temperature range (-55 °C to +150 °C).
Does SMBJ75AHM3/I meet automotive qualification standards?
Yes, SMBJ75AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392 (Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - validating its use in automotive body control modules, infotainment power supplies, and ADAS sensor interfaces. The SMBJ75AHM3/I also meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements.
What does the "HM3" suffix indicate for SMBJ75AHM3/I?
The "HM3" suffix in SMBJ75AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS only) and HE3 (AEC-Q101, non-halogen-free) variants. This means the molding compound contains no brominated or chlorinated flame retardants, satisfying strict environmental regulations for automotive Tier 1 suppliers and green industrial OEMs. The SMBJ75AHM3/I's HM3 designation is verified in Vishay's official ordering information table and thermal characteristics section.
Can SMBJ75AHM3/I be used in bidirectional protection circuits?
No, SMBJ75AHM3/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMBJ75CA). Using SMBJ75AHM3/I in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. For symmetric surge protection, select SMBJ75CAHM3/I instead - which shares the same HM3 environmental and qualification attributes but supports clamping in both polarities.
What is the thermal resistance of SMBJ75AHM3/I, and how does it affect PCB layout?
SMBJ75AHM3/I 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 minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves surge endurance. For sustained surge duty cycles or high ambient temperatures (>85 °C), designers must verify junction temperature rise using PD = 5.0 W and derate accordingly - the SMBJ75AHM3/I's +150 °C TJmax allows margin for such adaptations.
SMBJ75AHM3/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:
- 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/I FAQ
1.How can I place an order for SMBJ75AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3/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 SMBJ75AHM3/I reliable?
The price and inventory of SMBJ75AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3/I?
SMBJ75AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3/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 SMBJ75AHM3/I?
For technical support, including SMBJ75AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3/I requirements.
6.How does Aetrix verify that SMBJ75AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3/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 SMBJ75AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3/I?
All SMBJ75AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3/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 SMBJ75AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ75AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3/I Tags
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