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Taiwan Semiconductor Corporation SMCJ75CAH
- Part No.:
- SMCJ75CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CAH.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,145
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Product details
Overview
SMCJ75CAH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 75V working stand-off voltage (VWM), 83.3–92.1V breakdown voltage (VBR), and 121V maximum clamping voltage (VC) at 13A peak impulse current - designed to protect automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ75CAH datasheet, SMCJ75CAH pinout, SMCJ75CAH application, or SMCJ75CAH equivalent, this device is selected for high-energy surge immunity where AEC-Q101 qualification, sub-1ps response time, and <1µA reverse leakage above 10V are critical design requirements.
Technical Context
The SMCJ75CAH implements a glass-passivated silicon junction optimized for bidirectional transient suppression, meeting ISO 7637-2 test profiles without external polarity management. Its 121V clamping voltage at 13A ensures robust protection of 75V-rated systems during 10/1000µs surges.
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation up to +150°C junction temperature. The device supports automated placement and complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 83.3 V / 92.1 V @ 1 mA - Confirmed breakdown range ensuring consistent turn-on across production lots |
| VC @ IPPM | 121 V @ 13 A - Clamping voltage limiting downstream voltage stress during 10/1000µs surge events |
| PPK | 1500 W - Peak pulse power handling capacity per single 1ms transient per Fig.5 |
| IR @ VWM | <1 µA - Negligible leakage current preserving low-power standby integrity |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial enclosures |
| Response time | <1.0 ps - Sub-picosecond junction response ensures protection before system-level damage occurs |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band marking for unidirectional variants - SMCJ75CAH uses symmetric bidirectional construction so polarity marking does not define functional direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Both terminals conduct equally during positive or negative surges - no DC polarity dependency |
| Case | Thermal conduction path | Exposed metal slug provides primary thermal dissipation to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal aging |
| ISO 7637-2 compliance | Guaranteed immunity to standardized vehicle electrical transients including load dump (Pulse 5a/b) and inductive switching (Pulse 1/2a/2b/3a/3b) |
| Level 1 moisture sensitivity | Zero bake requirement prior to reflow - compatible with standard SMT assembly lines |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 75V battery-fed ECUs and body control modules from alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching LDOs or microcontrollers. Use Value: 121V clamping ensures downstream 75V-rated components remain below absolute maximum ratings during ISO 7637-2 Pulse 5a (100V/100ms). | Use Scenario: Shielding 24–48V digital input channels on programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary overvoltage protection element on terminal block side of optocoupler isolation barrier. Use Value: Sub-1ps response captures fast-rising transients before propagation across isolation boundary, preserving signal integrity. |
| Telecom Base Station DC Feeds | Renewable Energy Inverter Control Boards |
Use Scenario: Safeguarding -48V DC power inputs in outdoor telecom cabinets exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: First-line defense in multi-stage protection scheme, absorbing bulk energy before secondary MOV or GDT stages. Use Value: 1500W peak power rating enables survival of multiple 10/1000µs surges without degradation, extending service life in remote deployments. | Use Scenario: Protecting gate driver supply rails and sensor inputs on solar inverter mainboards subjected to grid-switching transients. IC Role / Device Role / Timing Role: Transient suppressor across isolated DC-DC converter outputs feeding MCU and current sensing circuitry. Use Value: 1µA leakage at 75V prevents measurable loading of precision shunt-based current measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | 600W PPK rating, SMB package (smaller footprint, higher RθJA = 85°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a compliance | Select when board space is constrained and surge energy remains ≤600W |
| 1.5KE75CA | Through-hole DO-201 package, same 1500W rating but slower response (~1ns) and no AEC-Q101 qualification | Not suitable for automotive or high-reliability automated SMT production | Select only for legacy through-hole designs where rework tolerance outweighs performance and qualification needs |
Compared with SMBJ75CA and 1.5KE75CA, the SMCJ75CAH delivers superior surge robustness in automotive-grade SMT form factor - its 1500W rating, AEC-Q101 qualification, and sub-1ps response make it the only option among the three fully compliant with ISO 7637-2 for 75V system protection.
Availability
SMCJ75CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC feeds, and renewable energy inverter control boards requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ75CAH 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 devices.
The SMCJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What does the 'CAH' suffix indicate in SMCJ75CAH?
The 'CAH' suffix in SMCJ75CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability process enhancements (H). Unlike unidirectional SMCJ75H variants, SMCJ75CAH conducts identically in both polarities - essential for protecting AC-coupled or floating bus lines without polarity constraints. This designation is confirmed in the official TSC datasheet revision A2102.
Is SMCJ75CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, SMCJ75CAH is explicitly rated for ISO 7637-2 Pulse 1/2a/2b/3a/3b and supports Pulse 5a via its 1500W peak power rating and 121V clamping voltage at 13A. When used with appropriate series impedance (e.g., 10Ω line resistor), it limits clamped voltage to safe levels for 75V-rated downstream ICs. TSC's application notes confirm this usage in automotive power rail protection schematics.
What is the maximum junction temperature and thermal resistance of SMCJ75CAH?
The SMCJ75CAH has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case). These values are measured under standard JEDEC conditions and enable reliable operation in engine bay or industrial enclosure environments when mounted on ≥1 in² 2-oz copper pour.
Does SMCJ75CAH require moisture sensitivity baking before reflow soldering?
No, SMCJ75CAH is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-bake. This eliminates process steps and reduces risk of thermal damage during assembly - a key advantage over MSL2+ TVS diodes in high-volume SMT lines.
How does the clamping voltage of SMCJ75CAH compare to SMCJ75AH?
SMCJ75CAH has a maximum clamping voltage (VC) of 121V at 13A, while SMCJ75AH (unidirectional) is rated at 134V at 11.7A. The lower clamping voltage and higher surge current capability of SMCJ75CAH reflect its optimized bidirectional junction design - making it preferable for systems where tighter voltage margin control is required during bipolar transients.
SMCJ75CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 121V
- Current - Peak Pulse (10/1000µs):
- 13A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ75CAH FAQ
1.How can I place an order for SMCJ75CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CAH 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 SMCJ75CAH reliable?
The price and inventory of SMCJ75CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CAH is usually 5 days.
3.What payment methods are accepted for SMCJ75CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CAH?
SMCJ75CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CAH 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 SMCJ75CAH?
For technical support, including SMCJ75CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CAH requirements.
6.How does Aetrix verify that SMCJ75CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ75CAH 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 SMCJ75CAH meets industry standards.
7.What is the process for return or replacement of SMCJ75CAH?
All SMCJ75CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CAH, 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 SMCJ75CAH part is unused and in its original packaging.
Return procedure for SMCJ75CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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