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Vishay General Semiconductor - Diodes Division SMBJ75AHM3_B/H
- Part No.:
- SMBJ75AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3_B/H.pdf
- Description:
- 600W,75V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,252
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Product details
Overview
SMBJ75AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in 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 industrial motor drives, automotive body control modules, and industrial sensor interfaces.
For engineers reviewing the SMBJ75AHM3_B/H datasheet, SMBJ75AHM3_B/H pinout, SMBJ75AHM3_B/H application, or SMBJ75AHM3_B/H equivalent, this part delivers AEC-Q101 qualified surge immunity, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for high-reliability embedded power rail protection where thermal stability, low leakage (<1.0 µA at VWM), and fast response time are mandatory.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to limit transient voltages before they damage downstream ICs or MOSFETs. Its junction temperature range spans –55 °C to +150 °C, and it exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
The SMBJ75AHM3_B/H is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and meets UL 497B recognition (QVGQ2) for protector classification - confirming suitability for safety-critical surge suppression in regulated industrial and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 72 V nominal systems. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1.0 mA - tight breakdown window ensures predictable turn-on threshold across temperature and unit variation. |
| VC @ IPPM | 121 V at 5.0 A - clamping voltage under full-rated surge; limits stress on protected 100 V-rated MOSFETs or controllers. |
| PPPM | 600 W (10/1000 µs) - peak pulse power handling capacity; sustains repetitive transients up to 0.01% duty cycle without degradation. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and enclosed industrial enclosures without derating. |
| Package | SMB (DO-214AA) - standardized surface-mount footprint compatible with IPC-7351B land patterns; 0.220" × 0.155" body size. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity marked by cathode band. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Meets MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 72 V supply rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for BCM, lighting, and ADAS power domains. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and full RoHS compliance - meets EU Directive 2011/65/EU and JEDEC J-STD-20. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure when properly mounted on 5 mm × 5 mm copper pads. |
| Fast response time | <1.0 ps intrinsic junction response - clamps transients before propagation to sensitive logic or analog circuitry. |
| Low incremental surge resistance | Ensures minimal VC overshoot during high-di/dt events - critical for protecting fast-switching GaN FETs and high-speed ADC references. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 72 V DC bus against inductive kickback from brushed DC motors and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between high-side switch drain and chassis ground. Use Value: Limits transient spikes to ≤121 V, preventing gate oxide rupture in 100 V-rated N-channel MOSFETs and ensuring ASIL-B functional safety compliance. |
Use Scenario: Surge suppression on LIN bus power rail and load-dump tolerant 12 V auxiliary supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on fused VBAT feed to microcontroller power domain. Use Value: Withstands ISO 7637-2 Pulse 5a (load dump up to 60 V for 400 ms) and maintains <1 µA leakage to avoid battery drain in sleep mode. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for 48 V PoE-powered remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC/DC converter input filter. Use Value: 600 W rating and 121 V clamping enable compliance with ITU-T K.21 heavy-duty surge requirements without requiring series impedance. |
Use Scenario: Protection of 24 V analog input channels (e.g., 4–20 mA loop receivers) in PLC I/O modules. IC Role / Device Role / Timing Role: Rail-to-rail clamping diode on field-side signal line referenced to local ground. Use Value: Ultra-low 1.0 µA leakage prevents measurement offset errors; SMB package allows dense layout near connector entry points. |
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_B/H | Same electrical specs, but RoHS-compliant with lead-based finish (E3 suffix); not halogen-free. | Acceptable for commercial/industrial use where halogen-free requirement is waived. | Select when cost sensitivity outweighs halogen-free mandate and AEC-Q101 is not required. |
| SMCJ75A-H | Higher 1500 W PPPM, larger SMC (DO-214AB) package, 125 V VC at 12.3 A - physically incompatible pinout. | Used where higher energy absorption is needed (e.g., primary AC/DC input stages), but requires PCB redesign. | Choose only if system-level surge testing exceeds 600 W capability and board space permits larger footprint. |
Compared with SMBJ75AHM3_B/H, the SMBJ75AHE3_B/H offers identical clamping performance without halogen-free assurance, while the SMCJ75A-H provides greater surge margin at the cost of board area and layout compatibility - making SMBJ75AHM3_B/H optimal for space-constrained, automotive-qualified 72–80 V rail protection.
Availability
SMBJ75AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.
Supply support for SMBJ75AHM3_B/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in compact SMT form factors, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low leakage, and repeatable clamping are essential design requirements.
FAQ
What is the maximum clamping voltage of SMBJ75AHM3_B/H at its rated peak pulse current?
The SMBJ75AHM3_B/H has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures protected components see no more than 121 V during surge events. The SMBJ75AHM3_B/H achieves this with low incremental surge resistance and fast avalanche response, making it suitable for safeguarding 100 V-rated power semiconductors.
Is SMBJ75AHM3_B/H qualified for automotive applications?
Yes, SMBJ75AHM3_B/H is AEC-Q101 qualified, as confirmed by the HM3 suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation per AEC-Q101 Rev D. This makes SMBJ75AHM3_B/H appropriate for under-hood and cabin applications such as body control modules, lighting drivers, and infotainment power rails where automotive-grade reliability is mandatory.
What does the "HM3" suffix indicate in SMBJ75AHM3_B/H?
The "HM3" suffix in SMBJ75AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates the halogen-free molding compound, "M3" confirms RoHS compliance and JESD201 Class 2 whisker resistance, and the underscore "_B/H" specifies tape-and-reel packaging in 7" reels (750 units). This distinguishes it from E3 (RoHS, non-halogen-free) and HE3 (AEC-Q101, non-halogen-free) variants.
Can SMBJ75AHM3_B/H be used in bidirectional configurations?
No, SMBJ75AHM3_B/H is strictly unidirectional, as indicated by the "A" suffix (e.g., SMBJ75A) and cathode-band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ75CA) and lack polarity marking. Using SMBJ75AHM3_B/H in bidirectional circuits would result in forward conduction during negative transients, causing failure. For bidirectional protection at 75 V, select SMBJ75CAHM3_B/H instead.
What is the thermal resistance of SMBJ75AHM3_B/H, and how does it affect layout?
The SMBJ75AHM3_B/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. To maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature. Layout best practice is to use minimum 5 mm² thermal pads per terminal with multiple vias to inner ground planes - critical for sustained surge repetition in industrial controls.
SMBJ75AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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)
SMBJ75AHM3_B/H FAQ
1.How can I place an order for SMBJ75AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3_B/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_B/H reliable?
The price and inventory of SMBJ75AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3_B/H?
SMBJ75AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3_B/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_B/H?
For technical support, including SMBJ75AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ75AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3_B/H?
All SMBJ75AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ75AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3_B/H Tags
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