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Taiwan Semiconductor Corporation SMCJ150CA
- Part No.:
- SMCJ150CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ150CA.pdf
- Description:
- TVS DIODE 150VWM 243VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,794
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Product details
Overview
SMCJ150CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 150V working stand-off voltage (VWM), 167–204V breakdown voltage (VBR), and 243V maximum clamping voltage (VC) at 6.4A peak impulse current - designed for automotive load-dump and ISO 7637-2 Pulse 3b protection in power supply rails.
For engineers reviewing the SMCJ150CA datasheet, SMCJ150CA pinout, SMCJ150CA application, or SMCJ150CA equivalent, key selection criteria include clamping performance under 10/1000μs surge, bidirectional symmetry, junction temperature rating up to +150°C, and compliance with IEC 61249-2-21 halogen-free and J-STD-020 moisture sensitivity level 1 requirements.
Technical Context
The SMCJ150CA uses a glass-passivated silicon junction optimized for fast response (<1.0 ps rise time from 0 V to VBR min) and low leakage (<1 μA at 150 V). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity concerns.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting sustained operation up to TJ = +150°C. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - critical for automotive ECU and infotainment system transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin above system nominal rail (e.g., 13.5 V automotive battery). |
| VBR min/max | 167 / 204 V @ IT = 1 mA - verified breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 243 V @ 6.4 A - clamping voltage limits downstream IC stress during 10/1000 μs surge; directly determines protected circuit's voltage tolerance. |
| PPK | 1500 W - peak pulse power handling per single 10/1000 μs event; supports high-energy automotive load dump events. |
| IR @ VWM | <1 μA - ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering. |
| TJ max | +150 °C - enables placement near hot components (e.g., power MOSFETs, DC/DC converters) without thermal derating penalties. |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case rated UL 94V-0, matte tin-plated leads, polarity indicated by cathode band (not applicable for bidirectional SMCJ150CA - no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage excursions relative to cathode terminal. |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Connects to reference plane (e.g., ground or common rail); completes low-impedance path for both polarities of surge current. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating supplies without external polarity management. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) - essential for automotive qualification. |
| Fast response time | <1.0 ps from 0 V to VBR min - prevents voltage overshoot before clamping engages, protecting sensitive gate oxides and analog front-ends. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - satisfies environmental compliance for global automotive and industrial OEMs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V vehicle battery line exposed to load dump (up to 120 V, 400 ms) and jump-start surges. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC/DC converter input to limit transient voltage to ≤243 V. Use Value: Prevents destruction of buck controller ICs (e.g., MPQ4312) and maintains system uptime during harsh electrical environments. | Use Scenario: 4–20 mA current loop interface in factory automation PLC I/O modules subjected to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Bidirectional shunt protector across loop terminals to divert ±2 kV/5 kHz EFT energy away from op-amp and ADC input stages. Use Value: Maintains measurement accuracy and eliminates reset events caused by transient-induced latch-up in precision analog signal chains. |
| LED Driver Surge Suppression | USB-C Port ESD Clamping |
Use Scenario: Constant-current LED driver board in outdoor signage exposed to lightning-induced surges on long DC feeder cables. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to clamp induced spikes before they reach LED string or PWM controller. Use Value: Extends LED array lifetime by limiting peak reverse voltage across diodes to <243 V, preventing catastrophic junction failure. | Use Scenario: USB-C receptacle on portable medical device requiring IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) ESD protection. IC Role / Device Role / Timing Role: First-line bidirectional ESD suppressor on VBUS and CC lines, placed before USB PD controller (e.g., FUSB302). Use Value: Absorbs >1500 W ESD pulses within nanoseconds while maintaining <1 μA leakage to avoid VBUS droop during idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150CA | Same VWM/VBR/VC specs but 600 W PPK rating; SMB package (smaller footprint, higher RθJA = 75°C/W). | Lower energy handling limits use to lower-risk environments (e.g., consumer USB ports vs. automotive battery rails). | Select SMBJ150CA only when surge energy is ≤600 W and PCB space is constrained. |
| 1.5KE150CA | Same 150 V VWM and bidirectional design, but axial DO-201 package; PPK = 1500 W, VC = 243 V, but slower response (~1 ns) and higher IR (≤5 μA). | Through-hole mounting requires manual assembly; unsuitable for automated SMT lines or high-density boards. | Choose 1.5KE150CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ150CA and 1.5KE150CA, the SMCJ150CA delivers identical clamping performance in a surface-mount DO-214AB package optimized for automated placement, superior thermal resistance (RθJA = 55°C/W), and lower leakage - making it the preferred choice for production-grade automotive and industrial SMT assemblies.
Availability
SMCJ150CA is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, LED driver systems, and USB-C port protection requiring stable component supply across multi-year production cycles.
Supply support for SMCJ150CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMCJ series was developed specifically for high-reliability transient suppression in ISO 7637-2-compliant automotive subsystems and ruggedized industrial equipment - emphasizing robustness, repeatable clamping, and AEC-Q101 readiness.
FAQ
What is the maximum clamping voltage of the SMCJ150CA under standard test conditions?
The SMCJ150CA has a maximum clamping voltage (VC) of 243 V when subjected to its rated peak impulse current (IPPM) of 6.4 A using the 10/1000 μs waveform defined in Fig.5 of the datasheet. This value is measured at TA = 25°C and guarantees that downstream circuitry sees no more than 243 V during a standardized surge event - a critical parameter for ensuring compatibility with 200 V-rated capacitors and MOSFETs in the protected stage.
Is the SMCJ150CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the SMCJ150CA is explicitly validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms per the manufacturer's documentation. Its 1500 W peak power rating, fast <1.0 ps response time, and bidirectional symmetry make it appropriate for protecting engine control units, body control modules, and infotainment systems against real-world automotive transients including load dump and battery disconnection events.
Does the SMCJ150CA have polarity markings, and how should it be oriented on the PCB?
No, the SMCJ150CA does not require polarity marking because it is a bidirectional TVS diode - its anode and cathode terminals are functionally symmetric and interchangeable. Unlike unidirectional variants (e.g., SMCJ150A), the "CA" suffix denotes bidirectional construction, so no cathode band is present on the DO-214AB package and orientation has no effect on electrical performance.
What is the junction-to-ambient thermal resistance (RθJA) of the SMCJ150CA, and why does it matter?
The SMCJ150CA has a typical junction-to-ambient thermal resistance (RθJA) of 55°C/W. This value quantifies how effectively heat generated during surge conduction transfers from the silicon die to ambient air via the PCB and package. A lower RθJA allows higher average power dissipation and improves reliability in thermally dense layouts - especially important when multiple transients occur in rapid succession or in enclosed enclosures with limited airflow.
How does the SMCJ150CA differ from the unidirectional SMCJ150A variant?
The SMCJ150CA is bidirectional with symmetrical clamping in both polarities, while the SMCJ150A is unidirectional and conducts only when the cathode is positive relative to the anode. Electrically, SMCJ150CA has identical VWM (150 V), VBR (167–204 V), and VC (243 V) ratings but lacks polarity marking and supports AC or floating node protection. The SMCJ150A exhibits slightly lower VC (231 V) and is used where polarity is fixed and lower clamping is prioritized.
SMCJ150CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ150CA FAQ
1.How can I place an order for SMCJ150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ150CA 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 SMCJ150CA reliable?
The price and inventory of SMCJ150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ150CA is usually 5 days.
3.What payment methods are accepted for SMCJ150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ150CA?
SMCJ150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ150CA 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 SMCJ150CA?
For technical support, including SMCJ150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ150CA requirements.
6.How does Aetrix verify that SMCJ150CA is sourced from the original manufacturer or authorized distributors?
All SMCJ150CA 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 SMCJ150CA meets industry standards.
7.What is the process for return or replacement of SMCJ150CA?
All SMCJ150CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ150CA, 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 SMCJ150CA part is unused and in its original packaging.
Return procedure for SMCJ150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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