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Vishay General Semiconductor - Diodes Division SMBJ75AHM3_B/I
- Part No.:
- SMBJ75AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3_B/I.pdf
- Description:
- 600W,75V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,349
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Product details
Overview
SMBJ75AHM3_B/I 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 telecom power supplies.
For engineers reviewing the SMBJ75AHM3_B/I datasheet, SMBJ75AHM3_B/I pinout, SMBJ75AHM3_B/I application, or SMBJ75AHM3_B/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, clamping performance under surge, and halogen-free RoHS-compliant sourcing details - all confirmed from Vishay's official 88392 document (Rev. 09-Jan-2024).
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, responding to transient overvoltages above its VWM threshold by entering low-impedance conduction mode within <1 ps. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 75 V), while the SMB package supports automated SMT placement and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Thermal resistance is rated at 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, and it sustains repetitive surges up to 0.01% duty cycle. The device is halogen-free, RoHS-compliant, and AEC-Q101 qualified - indicated by the "HM3" suffix and "_B/I" tape-and-reel packaging code for 13" reels (3200 units).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal system voltage. |
| VC (Clamping Voltage) | 121 V at IPPM = 5.0 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability for transient suppression without failure. |
| ID (Reverse Leakage) | ≤1.0 µA at 75 V - Negligible standby current draw; avoids battery drain or signal distortion in low-power systems. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - Industry-standard 2-pin SMT outline; 0.220" × 0.155" footprint with cathode band marking. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking on one end. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms current path during reverse-biased clamping event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 75 V rail); carries surge current into anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including BCM, lighting, and infotainment power rails. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU and global OEM supply chains (HM3 suffix). |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during transients - critical for protecting 75 V-rated MOSFETs and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; simplifies manufacturing and reduces handling risk. |
Applications
| Industrial Motor Drive Power Supply | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of 72–80 V DC bus against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input capacitor to clamp positive-going transients before they reach DC-DC converters. Use Value: Limits transient voltage to ≤121 V, preventing damage to 100 V-rated buck controllers and ensuring >100,000-cycle reliability. |
Use Scenario: Safeguarding LIN bus power rail and microcontroller I/O against load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 12 V auxiliary rail derived from vehicle battery, absorbing 600 W pulses without latch-up. Use Value: Maintains <1 µA leakage at 13.5 V nominal, avoiding false wake-ups while surviving ISO 7637-2 Pulse 5a (75 V/350 ms). |
| Telecom Remote Radio Unit (RRU) | Renewable Energy Charge Controller |
|
Use Scenario: Input-stage protection for 48 V PoE-powered baseband processing boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with upstream GDT and downstream π-filter. Use Value: Achieves sub-100 ns response and 121 V clamping, preserving integrity of 5 V/3.3 V LDOs and FPGA I/O banks. |
Use Scenario: Overvoltage suppression on PV array input of 75 V-class MPPT charge controllers subjected to rapid cloud-edge transients. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp between PV+ and chassis ground, sized for 600 W single-event energy. Use Value: Withstands repeated 10/1000 µs surges up to 5 A without parameter shift, supporting 15-year field life in desert installations. |
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/I | Same electrical specs, but RoHS-compliant (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Preferred for commercial-grade industrial equipment where automotive qualification is not required. | Select when halogen-free content is not mandated and cost optimization is prioritized over automotive compliance. |
| SMAJ75A-M3/5B | Lower 400 W PPPM rating, SMA package (smaller footprint), higher RθJA (140 °C/W), same VWM/VBR/VC. | Suitable for space-constrained consumer electronics with lower surge exposure; not AEC-Q101 qualified. | Choose only if board area is critical and surge threat level is below IEC 61000-4-5 Level 3; verify thermal margin. |
Compared with SMBJ75AHM3_B/I, the E3 variant trades halogen-free and AEC-Q101 compliance for lower cost, while the SMAJ75A-M3/5B sacrifices power handling and thermal performance for smaller size - making SMBJ75AHM3_B/I the optimal choice for automotive and high-reliability industrial designs requiring full specification headroom.
Availability
SMBJ75AHM3_B/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, telecom power interfaces, and renewable energy charge controllers requiring stable component supply with guaranteed long-term sourcing.
Supply support for SMBJ75AHM3_B/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 validation, and precise clamping are mandatory.
FAQ
What is the clamping voltage of SMBJ75AHM3_B/I at 5.0 A peak pulse current?
The SMBJ75AHM3_B/I has a maximum clamping voltage (VC) of 121 V when subjected to a 10/1000 µs waveform at 5.0 A peak pulse current. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75AHM3_B/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ75AHM3_B/I qualified for automotive applications?
Yes, SMBJ75AHM3_B/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix and ordering code documentation in Vishay's 88392 datasheet (Rev. 09-Jan-2024). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and surge robustness - validating SMBJ75AHM3_B/I for use in automotive body control modules, lighting systems, and infotainment power rails.
What does the "_B/I" suffix mean in SMBJ75AHM3_B/I?
The "_B/I" suffix in SMBJ75AHM3_B/I indicates packaging configuration: "B" denotes the revision level (Revision B), and "I" specifies 13-inch diameter plastic tape-and-reel delivery containing 3200 units. This matches Vishay's preferred ordering format shown in the "ORDERING INFORMATION" section of document 88392, confirming SMBJ75AHM3_B/I is a production-ready, fully traceable variant.
How does SMBJ75AHM3_B/I differ from SMBJ75A-E3/52?
SMBJ75AHM3_B/I uses halogen-free molding compound and is AEC-Q101 qualified, whereas SMBJ75A-E3/52 is RoHS-compliant but not halogen-free or automotive-qualified. Both share identical electrical parameters (VWM = 75 V, VC = 121 V), but SMBJ75AHM3_B/I supports automotive Tier-1 supply chain requirements and stricter environmental mandates - making SMBJ75AHM3_B/I the appropriate selection for certified vehicle subsystems.
What is the thermal resistance of SMBJ75AHM3_B/I, and how does it affect layout?
SMBJ75AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, as specified in the Thermal Characteristics table of document 88392. To maintain safe operation under repetitive surges, PCB layout must provide minimum recommended pad area and avoid thermal isolation - undersized pads or insufficient copper will cause excessive junction temperature rise and premature failure of the SMBJ75AHM3_B/I.
SMBJ75AHM3_B/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:
- 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/I FAQ
1.How can I place an order for SMBJ75AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3_B/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_B/I reliable?
The price and inventory of SMBJ75AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3_B/I?
SMBJ75AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3_B/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_B/I?
For technical support, including SMBJ75AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ75AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3_B/I?
All SMBJ75AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMBJ75AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3_B/I Tags
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