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Taiwan Semiconductor Corporation SMBJ75H
- Part No.:
- SMBJ75H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75H.pdf
- Description:
- 600W, 92.7V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,019
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Product details
Overview
SMBJ75H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 75V working stand-off voltage (VWM), and 134V maximum clamping voltage (VC) at 4.7A peak impulse current (IPP). It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ75H datasheet, SMBJ75H pinout, SMBJ75H application, or SMBJ75H equivalent, key selection criteria include clamping performance under 10/1000µs surge, unidirectional polarity marking, AEC-Q101 qualification, and thermal resistance (RθJA = 55°C/W) for board-level reliability in engine control units and lighting modules.
Technical Context
The SMBJ75H operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1ps response to ESD and fast transient events. Its breakdown voltage (VBR) is specified between 83.3V and 102V at 1mA test current, ensuring robust overvoltage threshold margin above the 75V VWM.
Designed for automotive-grade environments, it meets AEC-Q101 stress testing and ISO 7637-2 immunity requirements. The device exhibits <1μA blocking leakage at VWM, low RθJC (10°C/W), and UL 94V-0 molding compound - all critical for under-hood ECU protection where thermal cycling and humidity exposure are severe.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before conduction begins; defines safe system rail margin. |
| VBR min/max | 83.3 V / 102 V @ 1 mA - Confirmed avalanche onset range ensures reliable triggering without premature breakdown. |
| VC @ IPP | 134 V @ 4.7 A - Clamping voltage during 10/1000µs surge; limits downstream IC stress to safe levels. |
| PPK | 600 W - Peak pulse power handling per single transient; supports high-energy load dump suppression. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery drain budgets in always-on automotive circuits. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; enables thermal design with standard PCB copper area. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Weight: 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current sink during clamping. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12V/24V rail); polarity mark indicates direction of transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock. |
| Glass passivated junction | Ensures stable VBR over lifetime and prevents moisture-induced parameter drift in humid environments. |
| Clamping voltage ≤134 V @ 4.7 A | Provides defined overvoltage ceiling during ISO 7637-2 Pulse 5a (load dump), protecting 100V-rated MOSFETs and CAN transceivers. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related popcorning. |
Applications
| Automotive Engine Control Unit (ECU) | LED Headlamp Driver Module |
|---|---|
Use Scenario: Protects microcontroller power supply and CAN interface from load dump transients up to 120V during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp surges before they reach sensitive logic. Use Value: Limits clamped voltage to 134V, maintaining margin below 150V absolute maximum ratings of automotive-grade regulators and transceivers. | Use Scenario: Shields buck converter gate drivers and current-sense amplifiers from inductive kickback during LED string switching. IC Role / Device Role / Timing Role: Placed across high-side switch drain-source to absorb energy from flyback diode recovery and PWM turn-off spikes. Use Value: Sub-1ps response captures fast-edge transients before they propagate into analog sensing circuitry, preserving dimming accuracy. |
| Industrial PLC Digital Input Card | 12V DC Power Distribution Board |
Use Scenario: Guards optocoupler inputs and signal conditioning op-amps against EFT bursts (IEC 61000-4-4) and cable coupling noise. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-input line to shunt fast transients before reaching isolation barrier. Use Value: 1μA leakage at 75V VWM avoids false triggering in high-impedance voltage divider interfaces used for 24V sensor detection. | Use Scenario: Installed at main 12V bus entry point to suppress coupled surges from motor drives and relay coils in factory automation cabinets. IC Role / Device Role / Timing Role: Acts as primary rail clamp upstream of fuses and secondary TVS arrays, absorbing bulk surge energy first. Use Value: 600W PPK rating handles repetitive 10/1000µs pulses without degradation, supporting long-term field reliability in harsh electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Bi-directional configuration; VC = 121V @ 4.9A; same DO-214AC (SMA) footprint but different package height and thermal mass. | Requires polarity-insensitive placement; less suitable for DC rail protection where unidirectional leakage matters. | Select SMAJ75A only if bidirectional surge immunity (e.g., AC-coupled lines) is required and layout allows SMA package height constraints. |
| ON Semiconductor 1.5SMC75A | Same unidirectional function; VC = 121V @ 5.0A; DO-214AB (SMC) package with higher PPK (1500W) but larger footprint and lower mounting density. | Better for higher-energy transients but incompatible with SMB pad layout; requires PCB redesign. | Choose 1.5SMC75A when surge energy exceeds 600W capability and board space permits larger SMC footprint. |
Compared with SMAJ75A and 1.5SMC75A, the SMBJ75H offers optimal balance of AEC-Q101 compliance, compact DO-214AA footprint, and verified 134V clamping at 4.7A - making it preferred for space-constrained automotive ECUs where unidirectional rail protection and thermal performance are prioritized.
Availability
SMBJ75H is available at Aetrix Electronics and suitable for automotive engine control units, LED lighting modules, industrial PLC input cards, and 12V DC power distribution boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMBJ75H 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with global automotive and industrial certifications.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in automotive power systems, emphasizing low clamping voltage, high surge robustness, and process stability across wide temperature ranges.
FAQ
What is the maximum clamping voltage of SMBJ75H under standard 10/1000µs surge conditions?
The SMBJ75H has a maximum clamping voltage (VC) of 134 V when subjected to a 10/1000µs waveform at 4.7 A peak impulse current (IPP). This value is measured per ANSI/IEEE C62.35 and confirmed in Taiwan Semiconductor's official SMBJH Series datasheet revision A2102. The SMBJ75H maintains this clamping performance across its full operating temperature range of –55°C to +150°C.
Is SMBJ75H suitable for bidirectional transient protection?
No, SMBJ75H is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and explicit cathode band marking. For bidirectional protection, Taiwan Semiconductor specifies SMBJ75CH or SMBJ75CAH variants. Using SMBJ75H in AC or bipolar applications risks reverse conduction failure and insufficient protection during negative transients.
Does SMBJ75H meet AEC-Q101 qualification requirements?
Yes, SMBJ75H is explicitly AEC-Q101 qualified per the manufacturer's documentation. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and humidity bias life testing to ensure reliability in automotive under-hood environments. This qualification is listed in the FEATURES section of the SMBJH Series datasheet (Version A2102).
What is the leakage current specification for SMBJ75H at its working stand-off voltage?
The SMBJ75H exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 75 V working stand-off voltage (VWM) and tested at TA = 25°C. This ultra-low leakage is critical for battery-powered or always-on automotive modules where standby current must remain below microamp thresholds to avoid excessive drain.
What package type does SMBJ75H use, and is it compatible with standard SMT assembly processes?
SMBJ75H uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads that comply with J-STD-002 solderability standards. Its moisture sensitivity level (MSL) is Level 1 per J-STD-020, meaning it can be processed using standard reflow profiles without pre-baking - fully compatible with high-volume automated placement and lead-free reflow.
SMBJ75H 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 4.7A
- 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)
SMBJ75H FAQ
1.How can I place an order for SMBJ75H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75H 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 SMBJ75H reliable?
The price and inventory of SMBJ75H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75H is usually 5 days.
3.What payment methods are accepted for SMBJ75H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75H?
SMBJ75H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75H 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 SMBJ75H?
For technical support, including SMBJ75H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75H requirements.
6.How does Aetrix verify that SMBJ75H is sourced from the original manufacturer or authorized distributors?
All SMBJ75H 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 SMBJ75H meets industry standards.
7.What is the process for return or replacement of SMBJ75H?
All SMBJ75H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75H, 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 SMBJ75H part is unused and in its original packaging.
Return procedure for SMBJ75H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75H Tags
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