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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3_A/H
- Part No.:
- SMBJ7.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,627
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Product details
Overview
SMBJ7.5CAHM3_A/H 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 and power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power rating with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHM3_A/H datasheet, SMBJ7.5CAHM3_A/H pinout, SMBJ7.5CAHM3_A/H application, or SMBJ7.5CAHM3_A/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance data, and real-world protection use cases - all critical for ESD/surge design validation and automotive-grade component selection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<100 µA at VWM), while the low incremental surge resistance enables rapid energy diversion during fast-rising transients (e.g., inductive switch-off spikes).
The device is rated for 150 °C maximum junction temperature and exhibits a +0.067 %/°C temperature coefficient of VBR - enabling predictable voltage shift over temperature in precision protection circuits. Its MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility support high-reliability automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before significant leakage begins; defines safe signal line operating margin. |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - guaranteed breakdown range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 12.9 V at 46.5 A - clamped voltage seen by protected circuit during worst-case 600 W transient; determines downstream IC survivability. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surge events. |
| ID @ VWM | ≤100 µA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss in battery-powered systems. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - maximum allowable junction temperature; supports operation in under-hood automotive or industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified (HM3 suffix). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts negative-going surges; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive polarity) | Accepts positive-going surges; functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events on 50 Ω source impedance lines. |
| AEC-Q101 qualification | Validated for automotive applications including infotainment, body control modules, and ADAS sensor interfaces. |
| MSL Level 1 | Allows unlimited floor life and 260 °C lead-free reflow without baking - simplifies SMT manufacturing flow. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN physical layer transceivers from load dump and ESD in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines (CAN_H/CAN_L) to limit transient excursions. Use Value: Maintains signal integrity below 13 V during 10/1000 µs surges up to 46.5 A, preventing transceiver latch-up or damage. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on data lines to shunt induced transients before they reach the transceiver input stage. Use Value: Clamps to ≤12.9 V within <1 ns, preserving communication uptime during repetitive 600 W surge events. |
| Consumer Power Adapter Input Stage | Telecom Ethernet PHY Port Protection |
|
Use Scenario: Secondary-side surge suppression in USB-C PD adapters subjected to conducted transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between DC output rail and ground to absorb line-to-ground surges. Use Value: Withstands 1000× 600 W pulses at 0.01% duty cycle without degradation, ensuring long-term adapter reliability. |
Use Scenario: Protecting 10/100/1000BASE-T PHYs in VoIP gateways from lightning-induced surges on Ethernet ports. IC Role / Device Role / Timing Role: Bidirectional TVS array element across transformer-coupled pairs to clamp common-mode transients. Use Value: Symmetric clamping prevents DC bias shift on magnetics while limiting voltage to <13 V during 10/1000 µs events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHE3_A/H | RoHS-compliant, commercial-grade (non-AEC-Q101); same VWM, VBR, VC, and PPPM specs. | Lacks automotive qualification; suitable for consumer/industrial designs not requiring AEC-Q101 traceability. | Select when cost-sensitive non-automotive designs require identical electrical performance without automotive certification. |
| SMAJ7.5CAHM3_A/H | Same electrical specs but in smaller SMA (DO-214AC) package; 400 W PPPM (vs. 600 W); RθJA = 140 °C/W. | Lower power handling and higher thermal resistance limit use in high-energy surge environments. | Choose only if board space constraints prohibit SMB footprint and surge energy remains ≤400 W. |
Compared with SMBJ7.5CAHE3_A/H, the SMBJ7.5CAHM3_A/H adds AEC-Q101 qualification and halogen-free construction; versus SMAJ7.5CAHM3_A/H, it delivers 50% higher surge power rating and 29% lower thermal resistance - making it the preferred choice for automotive and high-reliability industrial surge protection where PCB area permits the SMB footprint.
Availability
SMBJ7.5CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom infrastructure requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ7.5CAHM3_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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-power transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems needing robust, bidirectional, AEC-Q101-qualified TVS solutions.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ7.5CAHM3_A/H provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMBJ7.5AHM3_A/H), it has no cathode band marking and functions identically across either terminal polarity, making it ideal for AC signal lines and differential buses like CAN or RS-485.
Is SMBJ7.5CAHM3_A/H qualified for automotive applications?
Yes, SMBJ7.5CAHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay's ordering documentation. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating its suitability for under-hood and cabin-mounted automotive electronics including sensor interfaces, body control units, and infotainment systems.
What is the maximum clamping voltage of SMBJ7.5CAHM3_A/H and how is it measured?
The maximum clamping voltage (VC) of SMBJ7.5CAHM3_A/H is 12.9 V, measured at 46.5 A peak pulse current (IPPM) using a standardized 10/1000 µs double-exponential surge waveform. This value represents the highest voltage the device allows across its terminals during worst-case transient conditions - a critical parameter for ensuring protected ICs remain within their absolute maximum ratings.
How does SMBJ7.5CAHM3_A/H differ from the SMAJ7.5CAHM3_A/H variant?
SMBJ7.5CAHM3_A/H uses the larger SMB (DO-214AA) package and delivers 600 W peak pulse power, whereas SMAJ7.5CAHM3_A/H uses the smaller SMA (DO-214AC) package and is rated for 400 W. The SMBJ version also offers lower thermal resistance (RθJA = 100 °C/W vs. 140 °C/W), enabling better power dissipation in high-duty-cycle surge environments - making SMBJ7.5CAHM3_A/H the appropriate choice when surge energy exceeds 400 W or thermal performance is critical.
Does SMBJ7.5CAHM3_A/H require a heatsink for standard operation?
No, SMBJ7.5CAHM3_A/H does not require an external heatsink for single-event transient suppression under typical PCB layout conditions - its 100 °C/W RθJA is specified with 0.2" × 0.2" copper pads per terminal, which suffices for most 600 W surge applications. However, for repetitive surge scenarios or elevated ambient temperatures (>70 °C), thermal derating per Figure 2 in the Vishay datasheet (Document Number 88392) must be applied to ensure TJ remains ≤150 °C.
SMBJ7.5CAHM3_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:
- -
- 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/H FAQ
1.How can I place an order for SMBJ7.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/H reliable?
The price and inventory of SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3_A/H?
SMBJ7.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/H?
For technical support, including SMBJ7.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3_A/H?
All SMBJ7.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3_A/H Tags
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