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Vishay General Semiconductor - Diodes Division SMBJ7.5AHM3_A/I
- Part No.:
- SMBJ7.5AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHM3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,384
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Product details
Overview
SMBJ7.5AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 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 and automotive electronics.
For engineers reviewing the SMBJ7.5AHM3_A/I datasheet, SMBJ7.5AHM3_A/I pinout, SMBJ7.5AHM3_A/I application, or SMBJ7.5AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 100 °C/W), and junction temperature range (–55 °C to +150 °C).
Technical Context
This TVS diode operates as a voltage-clamping protection device that conducts above its breakdown threshold to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance enables effective suppression of high-current transients such as IEC 61000-4-5 surges.
The SMBJ7.5AHM3_A/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports 5.0 W steady-state power dissipation at 50 °C ambient, and meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Confirmed minimum/maximum voltage at which device enters avalanche breakdown; ensures predictable turn-on behavior. |
| VC (Clamping Voltage) | 12.9 V at 46.5 A (10/1000 µs) - Peak voltage seen across protected circuit during worst-case surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Maximum transient energy absorption capability under standardized 10/1000 µs waveform; validates robustness against lightning-induced surges. |
| IPPM (Peak Pulse Current) | 46.5 A - Highest surge current the device can safely shunt without degradation; directly tied to PCB trace sizing and layout. |
| TJ max. | +150 °C - Maximum allowable junction temperature; sets thermal design limits for board-level power dissipation and derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained operation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band marking on cathode end; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current toward ground during overvoltage events. |
| Anode (unbanded end) | Reference node / return path | Typically connected to system ground or lower-potential rail; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge handling for IEC 61000-4-5 Level 3 (1 kV line-to-ground) in compact SMB footprint. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive powertrain and body electronics applications requiring extended reliability and temperature cycling validation. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer products targeting EU, China, and global markets. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing voltage stress on protected ICs and MOSFETs. |
| MSL Level 1, 260 °C peak reflow | Enables direct placement into standard lead-free SMT processes without baking or special handling. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and LIN bus lines in BCMs against load dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional clamping TVS placed between power rail and ground to limit transient excursions. Use Value: Clamps 12 V rail to ≤12.9 V during 46.5 A surges, preventing latch-up or damage to MCU and CAN/LIN transceivers. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role: Standoff-rated TVS on input side of optocoupler or Schmitt trigger interface. Use Value: Maintains 7.5 V standoff while clamping to 12.9 V, ensuring clean signal recognition and avoiding false triggering. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Front-End |
Use Scenario: Safeguarding gate drivers and bootstrap circuits in BLDC motor inverters from inductive kickback. IC Role / Device Role: Localized TVS on high-side gate drive path to absorb switching transients. Use Value: Fast <1 ns response and low VC prevent gate oxide overstress and unintended FET turn-on during commutation. |
Use Scenario: Secondary-side transient suppression on 48 V telecom power distribution boards exposed to hot-swap and backplane surges. IC Role / Device Role: Unidirectional TVS on DC output rail feeding baseband processors and memory modules. Use Value: 600 W rating and 12.9 V clamping ensure safe operation under repeated 10/1000 µs surges without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; unsuitable for automotive under hood or safety-critical zones. | Select when halogen-free or automotive qualification is not required and cost optimization is prioritized. |
| SMBJ7.5CAHM3_A/I | Bidirectional variant; same VWM (7.5 V), VBR (6.4–7.25 V), and VC (12.9 V); symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., RS-485, USB D+/D−) where polarity reversal may occur. | Choose only when bidirectional protection is needed; unidirectional SMBJ7.5AHM3_A/I is preferred for DC power rails. |
Compared with SMBJ7.5AHE3_A/I, the SMBJ7.5AHM3_A/I adds halogen-free construction and AEC-Q101 qualification - critical for automotive Tier 1 suppliers. Against SMBJ7.5CAHM3_A/I, it offers lower capacitance and optimized unidirectional clamping, making it more suitable for DC power rail protection where polarity is fixed.
Availability
SMBJ7.5AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, consumer appliance motor drives, and telecom power supply front-ends requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMBJ7.5AHM3_A/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 power MOSFETs for high-reliability industrial and automotive applications.
The SMBJ series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing low clamping voltage, repeatable avalanche performance, and robust SMT manufacturability.
FAQ
What is the clamping voltage of SMBJ7.5AHM3_A/I at its rated peak pulse current?
The SMBJ7.5AHM3_A/I has a maximum clamping voltage (VC) of 12.9 V at 46.5 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. The SMBJ7.5AHM3_A/I maintains this clamping performance across its full operating temperature range and after repeated surge exposures, provided derating guidelines are followed.
Is SMBJ7.5AHM3_A/I suitable for automotive applications?
Yes, SMBJ7.5AHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is approved for use in body electronics, infotainment systems, and non-safety-critical power distribution modules where transient immunity to ISO 7637-2 and IEC 61000-4-5 is required. The SMBJ7.5AHM3_A/I undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 standards.
How does the HM3 suffix differ from the HE3 suffix in Vishay's SMBJ series?
The HM3 suffix on SMBJ7.5AHM3_A/I denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas the HE3 suffix indicates RoHS-compliance and AEC-Q101 qualification but not halogen-free materials. Both meet automotive reliability standards, but HM3 is required for applications subject to halogen restrictions (e.g., certain EU automotive OEM specifications). The SMBJ7.5AHM3_A/I and SMBJ7.5AHE3_A/I share identical electrical parameters and package dimensions.
What is the maximum operating junction temperature for SMBJ7.5AHM3_A/I?
The SMBJ7.5AHM3_A/I has a maximum operating junction temperature (TJ) of +150 °C, with storage temperature ranging from –55 °C to +150 °C. This rating allows reliable operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Thermal design must account for RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads; derating curves in the SMBJ7.5AHM3_A/I datasheet define safe power limits above 25 °C ambient.
Can SMBJ7.5AHM3_A/I be used in bidirectional signal line protection?
No - SMBJ7.5AHM3_A/I is a unidirectional TVS diode, intended for DC power rail or single-polarity signal line protection. For bidirectional applications such as RS-485, CAN, or AC-coupled interfaces, the bidirectional variant SMBJ7.5CAHM3_A/I should be used instead. Using SMBJ7.5AHM3_A/I on bidirectional lines risks reverse-bias breakdown during negative transients, potentially causing failure. The SMBJ7.5AHM3_A/I polarity is marked by a cathode band and must be oriented with cathode toward the protected line.
SMBJ7.5AHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7.5AHM3_A/I FAQ
1.How can I place an order for SMBJ7.5AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/I reliable?
The price and inventory of SMBJ7.5AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHM3_A/I?
SMBJ7.5AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/I?
For technical support, including SMBJ7.5AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ7.5AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHM3_A/I?
All SMBJ7.5AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ7.5AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHM3_A/I Tags
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Diodes Incorporated
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