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Taiwan Semiconductor Corporation SMBJ7.5CAH
- Part No.:
- SMBJ7.5CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAH.pdf
- Description:
- 600W, 8.8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,942
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Product details
Overview
SMBJ7.5CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade ESD and surge protection in power rails and signal lines. It features a 7.5 V working stand-off voltage, 12.9 V maximum clamping voltage at 100 A peak pulse current, 600 W peak pulse power rating, and AEC-Q101 qualification for under-hood and infotainment applications.
For engineers reviewing the SMBJ7.5CAH datasheet, SMBJ7.5CAH pinout, SMBJ7.5CAH application, or SMBJ7.5CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AA (SMB) package compatibility, and leakage current ≤1 µA at 7.5 V.
Technical Context
The SMBJ7.5CAH implements a glass-passivated silicon junction optimized for fast transient suppression with sub-1 ps response time. Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management, supporting robust protection of differential interfaces and AC-coupled circuits.
It operates across –55 °C to +150 °C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements - confirming suitability for reflow-soldered automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before significant leakage begins; sets minimum system rail margin for reliable standby operation. |
| VBR min/max | 8.33 V / 9.21 V @ 1 mA - Verified breakdown threshold ensures predictable turn-on during transients while avoiding false triggering during normal operation. |
| VC @ IPP | 12.9 V @ 100 A - Clamping voltage defines worst-case overvoltage seen by protected ICs during 10/1000 µs surge events. |
| PPK | 600 W - Peak pulse power handling capability per single 10/1000 µs waveform; determines survivability against load dump or inductive kick. |
| ID @ VWM | ≤1 µA - Ultra-low blocking leakage preserves battery life in always-on automotive modules and avoids false wake-up in low-power states. |
| TJ max | +150 °C - Enables placement near heat sources (e.g., power converters, motor drivers) without derating concerns in engine control units. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; bidirectional symmetry means no anode/cathode orientation required - terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as clamping node; no polarity dependency simplifies layout and eliminates orientation errors during automated placement. |
| Cathode band (marking only) | Manufacturing reference indicator | Present for traceability but electrically irrelevant in CAH-series bidirectional devices; does not affect circuit behavior. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including powertrain, body control, and ADAS modules per stress test requirements. |
| ISO 7637-2 compliant | Withstands standardized vehicle electrical transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation or failure. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; improves long-term reliability in harsh environments. |
| Fast response time <1 ps | Clamps ESD events before sensitive CMOS inputs reach destructive voltage thresholds - critical for USB, CAN, LIN interfaces. |
Applications
| Automotive Infotainment Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 5 V/12 V power supplies feeding head unit microcontrollers and display drivers from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed at board-level input filter stage to shunt transients before DC-DC regulators. Use Value: Limits rail overvoltage to ≤12.9 V during 100 A pulses, preventing latch-up or gate oxide damage in downstream PMICs and SoCs. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to field wiring inductive spikes. IC Role / Device Role / Timing Role: Front-end transient absorber mounted directly at connector entry point to divert energy before optocoupler or Schmitt trigger inputs. Use Value: Maintains channel integrity during repetitive 10/1000 µs surges up to 600 W, eliminating false triggering and extending input circuit MTBF. |
| LED Lighting Driver ESD Protection | Automotive CAN Transceiver Interface Protection |
Use Scenario: Shielding constant-current LED driver ICs from human-body-model (HBM) ESD during assembly and end-user service. IC Role / Device Role / Timing Role: Localized TVS placed adjacent to driver output pins to clamp fast-rising ESD pulses before internal FETs. Use Value: Sub-1 ps response ensures clamping occurs within first 100 ps of HBM event, limiting peak voltage to <13 V and preserving driver gate oxide integrity. | Use Scenario: Protecting high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) from coupled transients on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected across CAN_H–CAN_L to suppress common-mode surges while preserving signal integrity. Use Value: Symmetrical 12.9 V clamping prevents differential skew and maintains CAN recessive state margin, ensuring error-free communication during ISO 7637-2 Pulse 2b events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Same VWM, VC, and package; non-AEC-Q101 rated; higher typical leakage (≤5 µA vs. ≤1 µA). | Limited to industrial or consumer applications where automotive qualification is not mandated. | Select SMBJ7.5CAH when AEC-Q101 compliance, lower leakage, or ISO 7637-2 validation is required. |
| SMCJ7.5CA | Same VWM and bidirectional function but in larger DO-214AB (SMC) package; 1500 W PPK; higher thermal mass. | Suitable for higher-energy surge environments (e.g., alternator load dump), but requires larger PCB area and different pad layout. | Choose SMBJ7.5CAH for space-constrained automotive modules where 600 W rating suffices and SMC footprint is prohibitive. |
Compared with SMBJ7.5CA and SMCJ7.5CA, the SMBJ7.5CAH uniquely balances AEC-Q101 qualification, DO-214AA compactness, and ≤1 µA leakage - making it optimal for cost-sensitive, space-limited automotive ECUs requiring certified transient immunity.
Availability
SMBJ7.5CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and LED lighting driver designs requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMBJ7.5CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management components.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and surface-mount manufacturability in DO-214AA packages.
FAQ
What is the clamping voltage of SMBJ7.5CAH under a 100 A transient?
The SMBJ7.5CAH has a maximum clamping voltage (VC) of 12.9 V when subjected to a 100 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees that protected downstream circuitry will not experience rail voltages exceeding 12.9 V during such defined surge events - critical for safeguarding 3.3 V or 5 V logic interfaces.
Is SMBJ7.5CAH unidirectional or bidirectional?
SMBJ7.5CAH is a bidirectional TVS diode, indicated by the "CAH" suffix. Its symmetrical breakdown and clamping behavior in both polarities eliminate the need for polarity-aware placement. Unlike unidirectional variants (e.g., SMBJ7.5H), the SMBJ7.5CAH protects AC signals, differential buses like CAN, and floating power domains without requiring external biasing or orientation checks.
Does SMBJ7.5CAH meet automotive qualification standards?
Yes, SMBJ7.5CAH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction - including glass passivation, JESD201 Class 2 whisker resistance, and J-STD-020 Level 1 moisture sensitivity - confirms suitability for under-hood and cabin-mounted automotive electronic control units.
What is the maximum leakage current of SMBJ7.5CAH at its working voltage?
At its 7.5 V working stand-off voltage (VWM), the SMBJ7.5CAH exhibits a maximum blocking leakage current (ID) of 1 µA at 25 °C. This ultra-low leakage supports battery-powered and always-on automotive modules, minimizing quiescent power loss and avoiding false wake-up conditions in low-power sleep modes.
What package type does SMBJ7.5CAH use, and is it RoHS compliant?
SMBJ7.5CAH uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads, compliant with J-STD-002 solderability standards. It is RoHS compliant and halogen-free per IEC 61249-2-21, and its molding compound meets UL 94V-0 flammability rating - satisfying environmental and safety requirements for global automotive and industrial deployments.
SMBJ7.5CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 48A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.5CAH FAQ
1.How can I place an order for SMBJ7.5CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAH 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 SMBJ7.5CAH reliable?
The price and inventory of SMBJ7.5CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAH is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAH?
SMBJ7.5CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAH 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 SMBJ7.5CAH?
For technical support, including SMBJ7.5CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAH requirements.
6.How does Aetrix verify that SMBJ7.5CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAH 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 SMBJ7.5CAH meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAH?
All SMBJ7.5CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAH, 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 SMBJ7.5CAH part is unused and in its original packaging.
Return procedure for SMBJ7.5CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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