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Taiwan Semiconductor Corporation SMBJ7.5H
- Part No.:
- SMBJ7.5H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5H.pdf
- Description:
- 600W, 9.3V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,211
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Product details
Overview
SMBJ7.5H from Taiwan Semiconductor is a unidirectional 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, 8.33–10.3 V breakdown voltage at 1 mA, 14.3 V maximum clamping voltage at 100 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform. It is AEC-Q101 qualified and used in automotive lighting control modules to protect microcontrollers and CAN transceivers from load dump and ISO 7637-2 pulses.
For engineers reviewing the SMBJ7.5H datasheet, SMBJ7.5H pinout, SMBJ7.5H application, or SMBJ7.5H equivalent, key selection criteria include clamping voltage margin vs. IC absolute maximum ratings, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The SMBJ7.5H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 8.33–10.3 V), with fast response (<1.0 ps) enabling suppression of EFT and ESD transients before downstream IC damage occurs. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at 7.5 V).
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, supporting operation up to TJ = 150 °C. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in the DO-214AA (SMB) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR @ IT = 1 mA | 8.33–10.3 V - Breakdown voltage range defining turn-on threshold under standardized test conditions |
| VC @ IPP = 100 A | 14.3 V - Clamped voltage during 10/1000 µs surge; must stay below protected IC's absolute max rating |
| IPP (10/1000 µs) | 100 A - Peak surge current capability; determines immunity level against ISO 7637-2 Pulse 1 (inductive switch-off) |
| PPK | 600 W - Non-repetitive peak pulse power handling capacity under standard waveform |
| ID @ VWM | <1 µA - Low leakage ensures minimal power loss and no interference with 7.5 V rail monitoring circuits |
| TJ max | 150 °C - Maximum junction temperature; enables use in under-hood automotive environments |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional configuration. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; defines polarity for unidirectional clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V supply); conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage drift over time, and resistance to environmental contamination |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive transients: Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), Pulse 3a/3b (switching noise) |
| Moisture sensitivity level 1 | Enables direct placement without baking; compatible with standard SMT reflow profiles per J-STD-020 |
| Matte tin-plated leads | Ensures reliable solder wetting and long-term intermetallic bond integrity per J-STD-002 |
Applications
| Automotive Lighting Control | Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp control units exposed to load dump and battery reversal events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply and ground to clamp surges before they reach sensitive logic and analog circuitry. Use Value: Limits clamped voltage to 14.3 V at 100 A, staying safely below 16 V absolute max ratings of common automotive MCUs and LED drivers. | Use Scenario: Safeguarding 5 V and 3.3 V LDO regulators and CAN transceivers in BCMs subjected to ISO 7637-2 Pulse 1 and Pulse 2a. IC Role / Device Role / Timing Role: Secondary-level TVS on intermediate rails, coordinated with primary front-end protection to manage energy distribution across stages. Use Value: Sub-1 µA leakage at 7.5 V prevents loading of low-current bias networks feeding CAN bus termination and wake-up comparators. |
| Industrial Sensor Interface | 12 V Automotive Infotainment Power Input |
Use Scenario: Shielding RS-485 transceivers and ADC front-ends in vehicle-mounted environmental sensors from EFT bursts and cable-induced transients. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor harness inputs, placed immediately after connector to minimize inductance before clamping. Use Value: <1.0 ps response time ensures clamping initiates before 100 ns EFT edges propagate into signal conditioning circuitry. | Use Scenario: Protecting USB-C PD controllers and display power management ICs in infotainment head units connected to vehicle 12 V battery via fused harness. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V input rail upstream of buck converters and hot-swap controllers. Use Value: 600 W peak power rating handles full-energy ISO 7637-2 Pulse 1 (−100 V, 50 Ω, 40 ms) without degradation when properly heatsinked. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A | Narrower VBR range (8.33–9.21 V) and lower VC (12.9 V at 100 A); same package and power rating | Better clamping margin for 12 V systems with tight VMAX limits (e.g., 13.5 V-rated PMICs) | Select SMBJ7.5A when lower clamping voltage is prioritized over VBR tolerance width |
| SAC7.5 | Same VWM/VBR/VC specs but in smaller SOD-123FL package; lower PPK (400 W) and higher RθJA (100 °C/W) | Suitable for space-constrained consumer or non-automotive industrial designs where AEC-Q101 is not required | Select SAC7.5 only for cost-sensitive, non-automotive applications with lower surge exposure and thermal budget |
Compared with SMBJ7.5A and SAC7.5, the SMBJ7.5H offers broader VBR tolerance and AEC-Q101 qualification-critical for automotive reliability-while maintaining identical DO-214AA footprint and 600 W surge capability, making it the preferred choice for under-hood and chassis-mounted modules requiring certified robustness.
Availability
SMBJ7.5H is available at Aetrix Electronics and suitable for automotive lighting control, body control module (BCM) power rail protection, and industrial sensor interface applications requiring stable component supply, AEC-Q101 compliance, and consistent 600 W surge handling.
Supply support for SMBJ7.5H 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMBJH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment automotive electronics requiring high-energy transient immunity, low leakage, and long-term reliability under thermal and mechanical stress.
FAQ
What is the maximum clamping voltage of SMBJ7.5H at its rated peak pulse current?
The SMBJ7.5H has a maximum clamping voltage (VC) of 14.3 V when subjected to a 100 A peak impulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures the protected circuit sees no more than 14.3 V during worst-case surge events. The SMBJ7.5H maintains this clamping performance across its specified operating temperature range.
Is SMBJ7.5H suitable for bidirectional transient protection?
No, SMBJ7.5H is a unidirectional TVS diode and is not rated for bidirectional operation. For bipolar applications, Taiwan Semiconductor specifies parts with "CH" or "CAH" suffixes (e.g., SMBJ7.5CH). Using SMBJ7.5H in reverse-biased configurations may result in premature failure or undefined clamping behavior. Always verify polarity alignment in PCB layout-cathode must connect to the line being protected.
Does SMBJ7.5H meet automotive industry surge immunity standards?
Yes, SMBJ7.5H meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, and is AEC-Q101 qualified. These certifications confirm its suitability for automotive power networks subject to load dump, battery disconnection, and inductive switching transients. Its 600 W peak power rating and 14.3 V clamping voltage align directly with the energy levels defined in ISO 7637-2 for 12 V systems.
What is the leakage current specification for SMBJ7.5H at its working stand-off voltage?
The SMBJ7.5H exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 7.5 V working stand-off voltage (VWM). This ultra-low leakage ensures minimal power loss in always-on automotive subsystems and avoids interference with precision voltage monitoring circuits. The value is guaranteed at TA = 25°C and remains below 5 µA up to 125°C per datasheet derating curves.
Can SMBJ7.5H be used in place of SMBJ7.5A in an existing design?
SMBJ7.5H and SMBJ7.5A share the same DO-214AA package and pinout, but differ in VBR range (8.33–10.3 V vs. 8.33–9.21 V) and clamping voltage (14.3 V vs. 12.9 V at 100 A). Substituting SMBJ7.5H for SMBJ7.5A increases clamping voltage by 1.4 V-verify that downstream ICs tolerate this margin. No PCB changes are needed, but system-level surge testing is recommended after substitution.
SMBJ7.5H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 44A
- 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)
SMBJ7.5H FAQ
1.How can I place an order for SMBJ7.5H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5H 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 SMBJ7.5H reliable?
The price and inventory of SMBJ7.5H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5H?
SMBJ7.5H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5H 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 SMBJ7.5H?
For technical support, including SMBJ7.5H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5H requirements.
6.How does Aetrix verify that SMBJ7.5H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5H 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 SMBJ7.5H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5H?
All SMBJ7.5H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5H, 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 SMBJ7.5H part is unused and in its original packaging.
Return procedure for SMBJ7.5H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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