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Vishay General Semiconductor - Diodes Division SMBJ7.5AHM3/H
- Part No.:
- SMBJ7.5AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5AHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,244
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Product details
Overview
SMBJ7.5AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage 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 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMBJ7.5AHM3/H datasheet, SMBJ7.5AHM3/H pinout, SMBJ7.5AHM3/H application, or SMBJ7.5AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.55), and thermal resistance (RθJA = 100 °C/W) for board-level surge immunity design.
Technical Context
This TVS diode operates as a voltage-clamping device in reverse-biased configuration, triggering when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
The SMBJ7.5AHM3/H is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge current (IFSM), and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-reliability 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 leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Tight tolerance range ensures predictable turn-on during transients; critical for precision overvoltage protection. |
| VC (Clamping Voltage) | 12.9 V at IPPM = 46.5 A - Limits downstream IC stress during 600 W surge; clamping ratio VC/VBR ≈ 1.55 indicates high efficiency. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Sustains high-energy transients common in automotive load-dump and industrial switching noise. |
| ID (Reverse Leakage) | 100 µA max at VWM - Low leakage preserves system power integrity in battery-powered or low-quiescent-current designs. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 3.94 mm footprint and 2.2 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during reverse transient events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or sensor output); conducts surge current to anode when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E; eliminates brominated flame retardants for safer end-of-life processing. |
| 600 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation - suitable for industrial Ethernet and CAN bus protection. |
| Low clamping voltage (12.9 V) | Protects 5 V and 12 V logic interfaces (e.g., microcontroller GPIO, LIN transceivers) while maintaining safe margin below absolute maximum ratings. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without baking; reduces manufacturing cost and avoids moisture-induced popcorn failure. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between sensor VOUT and ground, shunting transients above 7.5 V. Use Value: Prevents latch-up or permanent damage to 12-bit ADC inputs and op-amps by limiting voltage to ≤12.9 V during 100 V/10 ms surges. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subjected to motor drive switching noise. IC Role / Device Role / Timing Role: Standoff protection element on A/B differential pair, referenced to local ground plane. Use Value: Maintains signal integrity by clamping common-mode spikes to <13 V, preserving receiver common-mode range and avoiding false triggering. |
| Power Supply Input Stage | Consumer Device USB Port |
|
Use Scenario: Secondary overvoltage protection on 12 V DC input of embedded power supplies after primary fuse and filter stage. IC Role / Device Role / Timing Role: Fast-acting crowbar element that diverts surge energy away from downstream regulators and MOSFETs. Use Value: Absorbs up to 600 W for 1 ms without failure, enabling use with lower-cost input capacitors and eliminating need for additional MOV stages. |
Use Scenario: ESD and surge suppression on VBUS line of USB 2.0 ports in smart home hubs and portable media players. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBUS and GND, activated only during positive overvoltage events. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) while adding <0.5 pF capacitance - no signal distortion on 480 Mbps data lines. |
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/H | Same electrical specs, but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification. | Acceptable for non-automotive industrial or consumer use where halogen content and automotive qualification are not mandated. | Select when cost sensitivity outweighs halogen-free requirement and automotive qualification is unnecessary. |
| SMAJ7.5A-M3 | Lower PPPM (400 W), larger VBR tolerance (min 6.4 V), SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable for space-constrained consumer PCBs with lower surge exposure; not recommended for automotive or industrial mains-connected systems. | Choose only for low-energy transient environments where 400 W rating suffices and board area is premium. |
Compared with SMBJ7.5AHM3/H, SMBJ7.5AHE3/H offers identical performance without halogen-free assurance or AEC-Q101 validation, while SMAJ7.5A-M3 trades robustness and thermal capability for compactness - making SMBJ7.5AHM3/H the optimal choice for automotive and high-reliability industrial deployments requiring full specification compliance.
Availability
SMBJ7.5AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O protection, and USB power-line hardening requiring stable component supply across extended production lifecycles.
Supply support for SMBJ7.5AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, halogen-free construction, and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ7.5AHM3/H at its rated peak pulse current?
The SMBJ7.5AHM3/H has a maximum clamping voltage (VC) of 12.9 V at its specified peak pulse current (IPPM) of 46.5 A, measured using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and confirms effective protection for 12 V systems. The SMBJ7.5AHM3/H maintains this clamping performance without degradation under repetitive surge conditions at 0.01 % duty cycle.
Is SMBJ7.5AHM3/H qualified for automotive applications?
Yes, SMBJ7.5AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. This makes SMBJ7.5AHM3/H suitable for engine control units, body electronics, and ADAS sensor interfaces where long-term reliability under thermal and electrical stress is essential.
What does the "HM3" suffix indicate in SMBJ7.5AHM3/H?
The "HM3" suffix in SMBJ7.5AHM3/H specifies halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - distinguishing it from commercial-grade variants like "E3". It also denotes packaging in 7" tape-and-reel (code "H") and compliance with JESD 201 Class 2 whisker resistance. This suffix directly maps to Vishay's ordering nomenclature in Document 88392 and guarantees conformance to automotive material and reliability standards.
How does SMBJ7.5AHM3/H compare to bidirectional TVS diodes like SMBJ7.5CA?
SMBJ7.5AHM3/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., 12 V supply rails), offering lower leakage and tighter VBR tolerance than bidirectional versions. In contrast, SMBJ7.5CA provides symmetrical clamping for AC or floating signals but exhibits higher ID and wider VBR spread. For SMBJ7.5AHM3/H, the cathode band must be oriented toward the protected line - incorrect placement renders it nonfunctional.
What is the thermal resistance of SMBJ7.5AHM3/H, and how does it affect layout design?
SMBJ7.5AHM3/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. This value requires adequate copper pour and thermal vias for sustained surge handling; reducing pad size increases junction temperature and de-rates IPPM. Layouts must follow Vishay's recommended mounting pad dimensions (Document 88392, page 5) to maintain rated 600 W pulse power capability.
SMBJ7.5AHM3/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:
- 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/H FAQ
1.How can I place an order for SMBJ7.5AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5AHM3/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/H reliable?
The price and inventory of SMBJ7.5AHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5AHM3/H?
SMBJ7.5AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5AHM3/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/H?
For technical support, including SMBJ7.5AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5AHM3/H requirements.
6.How does Aetrix verify that SMBJ7.5AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5AHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5AHM3/H?
All SMBJ7.5AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5AHM3/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/H part is unused and in its original packaging.
Return procedure for SMBJ7.5AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5AHM3/H Tags
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