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Vishay General Semiconductor - Diodes Division SMBJ7.5AHM3/I
- Part No.:
- SMBJ7.5AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHM3/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,922
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Product details
Overview
SMBJ7.5AHM3/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 DC power rails 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 MOSFET gates, microcontroller I/O, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5AHM3/I datasheet, SMBJ7.5AHM3/I pinout, SMBJ7.5AHM3/I application, or SMBJ7.5AHM3/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance data directly applicable to overvoltage protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its VBR threshold while remaining high-impedance below VWM. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100 µA at 7.5 V), and its 20 °C/W junction-to-lead thermal resistance supports reliable energy dissipation during repetitive surges.
The SMBJ7.5AHM3/I is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), meets MSL Level 1 per J-STD-020, and is qualified to AEC-Q101 - confirming suitability for automotive electronics where transient immunity and long-term reliability under thermal cycling are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse operating voltage before significant conduction begins; sets minimum system rail margin for safe operation. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1 mA - Confirmed avalanche onset range; defines precise clamping initiation point under transient stress. |
| VC (Clamping Voltage) | 12.9 V at 46.5 A (10/1000 µs) - Measured maximum voltage seen by protected circuit during worst-case surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained surge energy handling capability; validates robustness against IEC 61000-4-5 Level 4 (4 kV) transients on 50 Ω source impedance. |
| IPPM (Peak Pulse Current) | 46.5 A - Peak current the device safely shunts during standardized 10/1000 µs surge; used to size PCB trace width and layout spacing. |
| TJ max. | 150 °C - Maximum junction temperature; enables thermal design using RθJA = 100 °C/W and RθJL = 20 °C/W for board-level heat sinking. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; supports use in ADAS power domains and body control modules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 5 V rail); conducts surge current to ground when Vreverse > VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surge events up to 4 kV without cascaded TVS staging. |
| 12.9 V clamping at 46.5 A | Keeps downstream 3.3 V or 5 V logic ICs within absolute maximum ratings during 10/1000 µs transients. |
| AEC-Q101 qualified (HM3 suffix) | Validates reliability for automotive applications including engine control units, infotainment power rails, and CAN bus protection circuits. |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU for sustainable electronics manufacturing. |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking preconditioning. |
Applications
| Industrial Motor Drive Power Supply | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 12 V input stage of motor driver ICs from inductive kickback during MOSFET switching and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to limit transient overshoot to <13 V. Use Value: Prevents latch-up or gate oxide damage in half-bridge drivers by holding rail voltage within 12 V IC tolerance during 100 A surge events. |
Use Scenario: Shields LIN bus transceiver and microcontroller I/O pins from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 12 V supply rail upstream of LDO regulator feeding BCM MCU. Use Value: Maintains regulated 5 V/3.3 V supply integrity by clamping 12 V rail to ≤12.9 V, avoiding brownout or reset during 100 ms load dump pulses. |
| Consumer IoT Sensor Node | Telecom PoE-Powered Equipment |
Use Scenario: Safeguards MEMS accelerometer and environmental sensor analog front-end inputs from ESD events during handling or cable coupling. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on 3.3 V sensor supply line, placed adjacent to connector entry point. Use Value: Limits ESD-induced voltage excursion to <13 V for <100 ns, preventing sensor ADC saturation or internal ESD diode failure. |
Use Scenario: Protects Ethernet PHY power pins (3.3 V, 1.8 V) from surges coupled onto PoE pairs during lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC-DC output rails feeding PHY ICs in IEEE 802.3af/at PD designs. Use Value: Absorbs up to 600 W surge energy without degradation, ensuring PHY ICs remain functional after repeated 1.5 kV common-mode surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; not certified for automotive under ISO/TS 16949. | Select when halogen content or automotive qualification is not required; lower cost alternative for non-automotive BOMs. |
| SMBJ7.5A-M3/5B | Identical VWM, VBR, VC, and PPPM; same halogen-free formulation; differs only in tape-and-reel packaging (3200 pcs vs. 750 pcs). | No functional difference; identical performance and qualification; only logistics variation. | Choose based on production volume and assembly line reel compatibility - no electrical or reliability trade-offs. |
Compared with SMBJ7.5AHM3/I, the HE3/I variant omits AEC-Q101 validation and halogen-free certification, limiting automotive use, while the M3/5B version offers identical performance in larger reel format - making HM3/I the sole choice when both halogen-free compliance and automotive qualification are mandatory.
Availability
SMBJ7.5AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, consumer IoT sensor nodes, and telecom PoE-powered equipment requiring stable component supply across extended product lifecycles.
Supply support for SMBJ7.5AHM3/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 with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications systems where robustness against ESD, EFT, and surge events is non-negotiable.
FAQ
What is the clamping voltage of SMBJ7.5AHM3/I at its rated peak pulse current?
The SMBJ7.5AHM3/I has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 46.5 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet revision 09-Jan-2024 (Document Number: 88392), and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream 5 V or 3.3 V ICs remain within absolute maximum ratings. The SMBJ7.5AHM3/I maintains this clamping performance across its full operating temperature range.
Is SMBJ7.5AHM3/I qualified for automotive applications?
Yes, SMBJ7.5AHM3/I is AEC-Q101 qualified, as confirmed by its "HM3" suffix and documentation in Vishay's official datasheet. The HM3 designation indicates halogen-free, RoHS-compliant construction plus full AEC-Q101 stress testing - including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness - validating its use in automotive subsystems such as body control modules, infotainment power rails, and ADAS sensor interfaces. This qualification makes SMBJ7.5AHM3/I suitable for production automotive programs requiring PPAP compliance.
How does the SMBJ7.5AHM3/I differ from the SMBJ7.5A-E3/52 variant?
The SMBJ7.5AHM3/I differs from SMBJ7.5A-E3/52 in three key aspects: it is halogen-free (vs. standard RoHS), AEC-Q101 qualified (vs. commercial grade only), and supplied in 7" tape-and-reel (I-code) versus 7" reel with different packaging code (52). Electrically, both share identical VWM = 7.5 V, VBR = 8.33–9.21 V, and VC = 12.9 V. The HM3/I variant is therefore specified for automotive and environmentally regulated applications where halogen content and qualification level are mandatory - whereas E3/52 serves general industrial use.
What is the thermal resistance profile of SMBJ7.5AHM3/I, and how does it affect PCB layout?
SMBJ7.5AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per terminal. These values guide PCB thermal design: minimizing RθJA requires generous copper pour connected to both terminals, while RθJL confirms efficient heat transfer to solder joints and inner-layer planes. For sustained surge duty cycles, designers should avoid narrow traces and ensure ≥5 mm² thermal pad area per terminal - validated in Vishay's recommended mounting pad layout for DO-214AA packages.
Can SMBJ7.5AHM3/I be used for bidirectional transient suppression?
No, SMBJ7.5AHM3/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection - such as AC signal lines or differential buses - Vishay specifies the "CA" suffix (e.g., SMBJ7.5CA). Using SMBJ7.5AHM3/I on bidirectional signals would result in unintended forward conduction and potential damage; always match device polarity to circuit topology and transient directionality.
SMBJ7.5AHM3/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):
- 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/I FAQ
1.How can I place an order for SMBJ7.5AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHM3/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/I reliable?
The price and inventory of SMBJ7.5AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHM3/I?
SMBJ7.5AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHM3/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/I?
For technical support, including SMBJ7.5AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHM3/I requirements.
6.How does Aetrix verify that SMBJ7.5AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHM3/I?
All SMBJ7.5AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ7.5AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHM3/I Tags
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