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Vishay General Semiconductor - Diodes Division SMBJ7.5AHM3_A/H
- Part No.:
- SMBJ7.5AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHM3_A/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,117
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Product details
Overview
SMBJ7.5AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed to protect MOSFET gates and microcontroller I/O in industrial sensor interfaces.
For engineers reviewing the SMBJ7.5AHM3_A/H datasheet, SMBJ7.5AHM3_A/H pinout, SMBJ7.5AHM3_A/H application, or SMBJ7.5AHM3_A/H equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity alignment with DC bias rails, and halogen-free RoHS compliance required for automotive-grade production.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>100 MΩ at 7.5 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<100 µA at VWM).
The device uses a single P-N junction structure optimized for fast response (<1 ns), low incremental surge resistance, and repeatable clamping performance across 0.01% duty-cycle 10/1000 µs surges. Its SMB package provides 100 °C/W junction-to-ambient thermal resistance and meets J-STD-020 MSL Level 1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for DC rail protection without false triggering. |
| VBR min/max | 8.33 V / 9.21 V at 1 mA - Confirmed breakdown range defining turn-on threshold; ensures reliable clamping onset within specified tolerance. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 10/1000 µs surge; must remain below protected IC's absolute max input rating. |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against IEC 61000-4-5 Level 4 (4 kV) surges with proper PCB layout. |
| ID @ VWM | 100 µA max - Reverse leakage current at stand-off voltage; low value minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode band marking on one end. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, rated for 260 °C peak reflow (MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection to protected line | Connected to the node requiring overvoltage protection (e.g., 12 V supply rail or MCU input); conducts surge current to ground when triggered. |
| Anode | Ground reference terminal | Must be tied to low-impedance system ground plane; forms return path for clamped surge current; layout affects clamping effectiveness. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surges up to 4 kV without degradation across 100,000+ events. |
| 12.9 V clamping voltage at 46.5 A | Provides ≥1.5 V margin below typical 14 V logic IC absolute maximum ratings, preventing latch-up or oxide damage. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets automotive and industrial environmental compliance mandates including JESD201 Class 2 whisker resistance. |
| 1 ns response time | Clamps transients before sensitive downstream components experience damaging overvoltage stress. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load-dump and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Shunt clamping element placed between sensor output and ADC input, activated only during >8.33 V transients. Use Value: Prevents ADC saturation and firmware lockup by limiting input voltage to ≤12.9 V during 100 A surge events. |
Use Scenario: Safeguarding LIN bus transceiver inputs against battery line transients during alternator load dump in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-LIN data line, clamping positive spikes only. Use Value: Maintains LIN signal integrity by suppressing >12 V spikes while adding <0.5 pF capacitance-no data rate degradation. |
| Consumer Power Adapter Output | Motor Drive Gate Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs subjected to no-load regulation overshoot. IC Role / Device Role / Timing Role: Standoff-rated clamp parallel to output capacitor, conducting only during transient excursions beyond 7.5 V. Use Value: Limits output to 12.9 V during startup overshoot, protecting connected smartphones and tablets from overvoltage damage. |
Use Scenario: Shielding N-channel MOSFET gate drivers from Miller-induced voltage spikes during high-di/dt switching in BLDC inverters. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly across gate-source terminals to clamp dv/dt-induced ringing. Use Value: Suppresses gate voltage excursions beyond ±20 V, preventing unintended turn-on and shoot-through failure modes. |
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/H | RoHS-compliant but not halogen-free; same electrical specs and SMB package. | Approved for commercial-grade industrial use, not automotive AEC-Q101 qualified. | Select when halogen-free requirement is absent and cost optimization is prioritized. |
| SMAJ7.5A-M3 | Lower 400 W PPPM rating; SMA package (smaller footprint, higher RθJA = 150 °C/W). | Suitable for space-constrained consumer designs with lower surge immunity requirements (IEC 61000-4-5 Level 2). | Choose only if board area is critical and peak surge energy remains below 400 W capability. |
Compared with SMBJ7.5AHM3_A/H, the HE3 variant lacks halogen-free certification needed for Tier 1 automotive sourcing, while the SMAJ7.5A-M3 sacrifices 33% pulse power headroom and thermal performance-making SMBJ7.5AHM3_A/H the preferred choice for AEC-Q101-compliant, high-energy industrial and automotive applications.
Availability
SMBJ7.5AHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and motor drive gate protection requiring stable component supply, halogen-free compliance, and IEC 61000-4-5 Level 4 surge immunity.
Supply support for SMBJ7.5AHM3_A/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, precision, and automotive qualification.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance, low clamping voltage, and robust surge endurance in automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of SMBJ7.5AHM3_A/H under a 10/1000 µs surge?
The SMBJ7.5AHM3_A/H has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 46.5 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream ICs. The SMBJ7.5AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ7.5AHM3_A/H certified for automotive applications?
Yes, SMBJ7.5AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It meets the stress test requirements for temperature cycling, humidity, mechanical shock, and surge endurance defined in AEC-Q101, making it suitable for under-hood and body-control applications where reliability under thermal and electrical stress is critical. The SMBJ7.5AHM3_A/H carries full qualification documentation from Vishay.
How does the HM3 suffix differ from E3 or HE3 in SMBJ7.5A variants?
The HM3 suffix on SMBJ7.5AHM3_A/H specifies halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas E3 denotes RoHS-compliant commercial grade only, and HE3 adds AEC-Q101 qualification but not halogen-free materials. All three share identical electrical parameters and SMB package dimensions, but only HM3 satisfies strict automotive Tier 1 material declarations (e.g., JESD201 Class 2 whisker resistance and UL 94 V-0 molding compound). The SMBJ7.5AHM3_A/H is the sole variant meeting full automotive material and qualification requirements.
Can SMBJ7.5AHM3_A/H be used for bidirectional transient suppression?
No, SMBJ7.5AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical characteristics for single-polarity operation. For bidirectional protection, Vishay offers the SMBJ7.5CA variant (with "CA" suffix), which exhibits symmetrical breakdown in both directions and no polarity marking. Using SMBJ7.5AHM3_A/H in bidirectional configurations risks forward conduction during negative transients and invalidates its clamping specification. Always match device polarity to circuit topology-SMBJ7.5AHM3_A/H is intended for DC-biased lines only.
What is the thermal resistance and maximum power dissipation of SMBJ7.5AHM3_A/H?
The SMBJ7.5AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, and a maximum power dissipation (PD) of 5.0 W at TA = 50 °C on an infinite heatsink. Its junction temperature must not exceed +150 °C, requiring thermal derating above 25 °C ambient per Figure 2 in the datasheet. These values define safe continuous power handling and guide PCB copper area design-critical for sustained surge repetition in industrial controls. The SMBJ7.5AHM3_A/H thermal performance is validated per JESD51 standards.
SMBJ7.5AHM3_A/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:
- 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/H FAQ
1.How can I place an order for SMBJ7.5AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/H reliable?
The price and inventory of SMBJ7.5AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHM3_A/H?
SMBJ7.5AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/H?
For technical support, including SMBJ7.5AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ7.5AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHM3_A/H?
All SMBJ7.5AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHM3_A/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 SMBJ7.5AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ7.5AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHM3_A/H Tags
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