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Taiwan Semiconductor Corporation SMBJ75CH
- Part No.:
- SMBJ75CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CH.pdf
- Description:
- 600W, 92.7V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,147
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Product details
Overview
SMBJ75CH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial systems. It features a 75 V working stand-off voltage (VWM), 83.3–102 V breakdown voltage (VBR), 134 V maximum clamping voltage (VC) at 4.7 A peak impulse current (IPP), and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ75CH datasheet, SMBJ75CH pinout, SMBJ75CH application, or SMBJ75CH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 75 V), and DO-214AA thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ75CH is a unidirectional/bidirectional TVS diode optimized for fast transient suppression in 12 V/24 V automotive subsystems and industrial control interfaces. Its glass-passivated junction ensures stable VBR and low leakage, while its 600 W 10/1000 µs surge rating supports robust protection against load dump and EFT events.
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. The device is RoHS-compliant and halogen-free per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min / max | 83.3 V / 102 V @ 1 mA - Confirmed breakdown threshold range under standardized test conditions |
| VC @ IPP | 134 V @ 4.7 A - Clamped voltage during 10/1000 µs surge, defining protected circuit voltage ceiling |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform, derated above 25 °C |
| ID @ VWM | <1 µA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient, critical for PCB copper area design and power cycling reliability |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; polarity-sensitive for unidirectional variants, symmetric for bidirectional SMBJ75CH. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked end) | Transient return path (bidirectional) | Common terminal for both polarities; connects to protected line and ground reference simultaneously |
| Cathode (band end) | Transient return path (bidirectional) | Identical electrical role to anode in bidirectional configuration; no functional polarity distinction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| ISO 7637-2 compliant | Withstands defined automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation or failure |
| Sub-1 ps response time | Clamps within picoseconds of transient onset, protecting downstream ICs before voltage overshoot exceeds safe margins |
| Halogen-free & RoHS | Meets environmental compliance for global automotive and industrial OEM supply chains |
| Moisture sensitivity Level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
Applications
| Automotive Infotainment Power Rails | Industrial CAN Bus Transceivers |
|---|---|
Use Scenario: Protecting 12 V power inputs to head unit MCUs and display drivers from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing energy before it reaches LDOs or PMICs. Use Value: Prevents latch-up or permanent damage to sensitive SoCs by limiting transient voltage to ≤134 V during 600 W surges. | Use Scenario: Shielding CANH/CANL differential lines in factory automation controllers from EFT and ESD coupling. IC Role / Device Role / Timing Role: Common-mode TVS pair (one SMBJ75CH per line) referenced to chassis ground, suppressing common-mode transients. Use Value: Maintains CAN signal integrity during 4 kV EFT bursts by clamping induced common-mode spikes below transceiver absolute maximum ratings. |
| LED Headlamp Driver Outputs | PLC Digital Input Modules |
Use Scenario: Safeguarding high-side MOSFET gate drivers and current-sense amplifiers in adaptive LED lighting systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on switched 24 V output rails, shunting inductive kickback from solenoid-controlled optics. Use Value: Limits voltage reversal to ≤134 V during 100 A inductive turn-off events, preserving driver FET SOA and sense resistor accuracy. | Use Scenario: Protecting 24 V DC digital input terminals in programmable logic controllers from field-wiring transients and relay contact bounce. IC Role / Device Role / Timing Role: Input-stage TVS on each isolated input channel, referenced to system ground to clamp overvoltage before optocoupler input. Use Value: Enables reliable 3–30 V input detection despite ±1 kV surge events, reducing false triggering and field returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Same VWM (75 V), identical VBR (83.3–102 V), same DO-214AA package, but manufactured by ON Semiconductor | Qualified to AEC-Q101 and ISO 7637-2, but lacks explicit JESD201 Class 2 whisker test documentation in public datasheet | Preferred where second-source assurance is required and whisker testing is not mandated by end-customer spec |
| P6SMB75CA | Same 75 V VWM and bidirectional function, but lower PPK (600 W vs. P6SMB75CA's 600 W), identical clamping (134 V), slightly higher RθJA (60 °C/W) | Also AEC-Q101 qualified and ISO 7637-2 compliant; widely used in legacy automotive designs with mature qualification history | Recommended when replacing long-qualified BOMs or where extended thermal margin is acceptable |
Compared with SMBJ75CA and P6SMB75CA, the SMBJ75CH offers tighter thermal resistance (55 °C/W), JESD201 Class 2 whisker resistance, and explicit moisture sensitivity Level 1 - making it preferable for new high-reliability automotive modules requiring full process compatibility and long-term intermetallic stability.
Availability
SMBJ75CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and LED lighting control requiring stable component supply, full traceability, and AEC-Q101 compliance.
Supply support for SMBJ75CH 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, serving global automotive, industrial, and consumer markets since 1979.
The SMBJH series was developed specifically for AEC-Q101-compliant transient protection in harsh automotive environments, emphasizing low clamping voltage, fast response, and robust thermal performance in compact DO-214AA packaging.
FAQ
What does the "CH" suffix indicate in SMBJ75CH?
The "CH" suffix in SMBJ75CH denotes a bidirectional TVS diode variant in the SMBJH series. Unlike unidirectional "H" parts, SMBJ75CH provides symmetrical clamping for both positive and negative transients without polarity dependence - essential for protecting AC-coupled or differential signal lines such as CAN bus or sensor interfaces.
Is SMBJ75CH suitable for 24 V automotive load dump protection?
Yes, SMBJ75CH is rated for 75 V working stand-off and clamps at 134 V under 4.7 A surge, making it appropriate for 24 V systems where load dump pulses reach up to 120 V. Its 600 W peak power rating and AEC-Q101 qualification confirm suitability for ISO 7637-2 Pulse 5a simulation of alternator load dump events.
How does SMBJ75CH differ from SMBJ75AH?
SMBJ75AH is the unidirectional version with identical VWM (75 V) and VBR (83.3–92.1 V), but lower clamping voltage (121 V @ 5.2 A) and forward voltage specification. SMBJ75CH has broader VBR (83.3–102 V), higher clamping (134 V @ 4.7 A), and bidirectional symmetry - making it ideal for AC or floating signal protection where polarity is undefined.
Does SMBJ75CH require derating at elevated ambient temperatures?
Yes, SMBJ75CH must be derated above TA = 25 °C per Figure 2 in the datasheet. Its 600 W peak pulse power decreases linearly to ~400 W at 85 °C ambient and ~200 W at 125 °C, based on RθJA = 55 °C/W. PCB copper area and airflow must be validated for target operating temperature range.
Can SMBJ75CH be used in parallel for higher surge current handling?
No - SMBJ75CH is not recommended for parallel use due to VBR mismatch tolerance (±10–15%). Uneven current sharing may cause premature failure of one device. For higher IPP, select a single higher-rated part (e.g., 1.5KE75CA) or verify matched-bin pairing with TSC application engineering support.
SMBJ75CH 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):
- 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)
SMBJ75CH FAQ
1.How can I place an order for SMBJ75CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CH 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 SMBJ75CH reliable?
The price and inventory of SMBJ75CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CH is usually 5 days.
3.What payment methods are accepted for SMBJ75CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CH?
SMBJ75CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CH 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 SMBJ75CH?
For technical support, including SMBJ75CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CH requirements.
6.How does Aetrix verify that SMBJ75CH is sourced from the original manufacturer or authorized distributors?
All SMBJ75CH 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 SMBJ75CH meets industry standards.
7.What is the process for return or replacement of SMBJ75CH?
All SMBJ75CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CH, 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 SMBJ75CH part is unused and in its original packaging.
Return procedure for SMBJ75CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CH Tags
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