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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3_A/I
- Part No.:
- SMBJ7.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,476
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Product details
Overview
SMBJ7.5CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power 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, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ7.5CAHM3_A/I datasheet, SMBJ7.5CAHM3_A/I pinout, SMBJ7.5CAHM3_A/I application, or SMBJ7.5CAHM3_A/I equivalent, this device is evaluated for bidirectional surge protection in automotive-grade commercial designs where halogen-free, AEC-Q101-qualified TVS performance, low clamping ratio, and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable breakdown behavior, while the low incremental surge resistance enables rapid energy diversion during transient events.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.067 %/°C temperature coefficient of VBR supports predictable voltage clamping over wide operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - Confirmed breakdown range ensuring reliable triggering without premature conduction. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamping voltage under 600 W 10/1000 µs surge; limits downstream voltage stress to <1.7× VWM. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against lightning-induced or inductive-switching transients. |
| ID @ VWM | 100 µA max - Low reverse leakage at rated stand-off voltage, minimizing standby power loss in high-impedance circuits. |
| TJ max. | 150 °C - Maximum junction temperature enabling operation in under-hood automotive or industrial ambient environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated placement and J-STD-020 reflow. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with no anode/cathode designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected to protected line (e.g., CAN bus, sensor supply); conducts surge current bidirectionally to ground or rail. |
| Terminal 2 | Transient input/output node | Second connection point to same protected line; completes symmetrical clamping path with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, USB D+/D−) without polarity concerns. |
| 600 W peak pulse power | Withstands repetitive 10/1000 µs surges up to 600 W at 0.01 % duty cycle - sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and full RoHS compliance - meets environmental requirements for EU and global markets. |
| AEC-Q101 qualified | Qualified for automotive applications per AEC-Q101 stress test standard; supports use in engine control, body electronics, and ADAS subsystems. |
| MSL Level 1 | Rated for unlimited floor life and peak reflow temperature of 260 °C - eliminates baking requirements and simplifies SMT manufacturing. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Bus Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤12.9 V during 46.5 A surges, preventing ADC saturation and protecting 3.3 V/5 V input stages without adding series impedance. |
Use Scenario: Safeguarding differential RS-485 transceivers in factory automation PLCs subjected to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on A/B bus lines, leveraging symmetrical breakdown for common-mode and differential-mode suppression. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while preserving DC common-mode range up to ±12 V. |
| Consumer USB Port ESD Protection | Telecom Power Rail Clamp |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Bidirectional shunt device placed directly at connector, working alongside primary polymer-based TVS. Use Value: Provides sub-13 V clamping during 8 kV contact discharge (IEC 61000-4-2), reducing voltage overshoot seen by USB PHY transceivers. |
Use Scenario: Overvoltage clamp on +12 V telecom power distribution rails feeding remote radio units. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail and ground to absorb inductive kickback from relay coils and fan motors. Use Value: Absorbs 600 W surges without degradation, maintaining rail stability below 15 V and avoiding brownout resets in sensitive RF circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHE3_A/I | Same electrical specs and SMB package; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial-grade industrial or consumer systems where halogen-free and automotive qualification are not mandated. | Select when cost sensitivity outweighs halogen-free or automotive requirements; verify board-level reflow profile compatibility. |
| SMCJ7.5CAHM3_A/I | Same VWM, VBR, and VC; higher 1500 W PPPM; larger SMC (DO-214AB) package (7.11 mm × 6.22 mm). | Used where higher surge margin is needed (e.g., outdoor telecom enclosures), but requires PCB layout revision due to larger footprint. | Choose only if system-level surge testing exceeds 600 W; confirm thermal pad area and assembly process support for SMC package. |
Compared with SMBJ7.5CAHM3_A/I, the HE3 variant trades halogen-free construction and AEC-Q101 qualification for lower cost, while the SMCJ variant delivers 2.5× pulse power at the expense of board space and thermal design effort - making SMBJ7.5CAHM3_A/I optimal for space-constrained, automotive-qualified, and environmentally regulated designs.
Availability
SMBJ7.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB port protection, and telecom power rail clamping requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMBJ7.5CAHM3_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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering consistent clamping, low leakage, and robust surge handling in standardized surface-mount packages.
FAQ
What does the "HM3" suffix indicate in SMBJ7.5CAHM3_A/I?
The HM3 suffix in SMBJ7.5CAHM3_A/I denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. It confirms the device uses a halogen-free molding compound, meets JEDEC JESD201 Class 2 whisker resistance, and has passed the full AEC-Q101 stress test suite - making SMBJ7.5CAHM3_A/I suitable for automotive and environmentally regulated industrial applications.
Is SMBJ7.5CAHM3_A/I unidirectional or bidirectional, and how does that affect circuit placement?
SMBJ7.5CAHM3_A/I is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities with identical VBR, VC, and leakage characteristics. This allows placement across any two nodes needing transient suppression - such as differential signal pairs or floating power rails - without regard to polarity, eliminating orientation errors during assembly and simplifying layout for AC-coupled interfaces.
What is the maximum clamping voltage of SMBJ7.5CAHM3_A/I, and under what test condition is it specified?
The maximum clamping voltage of SMBJ7.5CAHM3_A/I is 12.9 V, measured at a peak pulse current (IPPM) of 46.5 A using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage imposed on protected circuitry during a 600 W transient event, ensuring downstream components see less than 1.7× the 7.5 V stand-off voltage.
Does SMBJ7.5CAHM3_A/I require special PCB layout considerations for thermal performance?
Yes - SMBJ7.5CAHM3_A/I achieves its rated 600 W pulse power only when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad size increases thermal resistance, derating both peak power and sustained dissipation; for continuous operation, ensure adequate copper area and consider adjacent thermal vias to internal ground planes to maintain TJ ≤ 150 °C.
How does the temperature coefficient of VBR impact SMBJ7.5CAHM3_A/I performance in automotive under-hood applications?
SMBJ7.5CAHM3_A/I has a VBR temperature coefficient of +0.067 %/°C, meaning its breakdown voltage increases by ~0.0005 V/°C above 25 °C. In under-hood environments reaching 125 °C junction temperature, VBR rises by ~6.7 % - shifting from 8.33–9.21 V to ~8.89–9.82 V. This ensures continued protection margin without premature conduction, supporting reliable operation across the full -55 °C to +150 °C automotive temperature range.
SMBJ7.5CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ7.5CAHM3_A/I FAQ
1.How can I place an order for SMBJ7.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/I reliable?
The price and inventory of SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3_A/I?
SMBJ7.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/I?
For technical support, including SMBJ7.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3_A/I?
All SMBJ7.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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