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Taiwan Semiconductor Corporation SMCJ54CA
- Part No.:
- SMCJ54CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54CA.pdf
- Description:
- TVS DIODE 54VWM 87.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,274
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Product details
Overview
SMCJ54CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 54V working stand-off voltage (VWM), 60–73.3V breakdown voltage (VBR), and 96.3V maximum clamping voltage (VC) at 16A peak impulse current - designed for automotive power line and industrial control system surge protection.
For engineers reviewing the SMCJ54CA datasheet, SMCJ54CA pinout, SMCJ54CA application, or SMCJ54CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 10V, and DO-214AB thermal performance (RθJA = 55°C/W).
Technical Context
The SMCJ54CA employs a glass-passivated silicon junction optimized for fast transient suppression in bidirectional configurations. Its electrical characteristics - including VBR min/max, VC@IPPM, and IR@VWM - are fully specified for both polarities, enabling symmetrical protection of AC-coupled or floating signal lines without polarity dependency.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports high-energy transients up to 1500W (1ms, 10/1000μs waveform). Thermal design is enabled by RθJC = 10°C/W and RθJA = 55°C/W, with steady-state power dissipation rated at 5W at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1mA | 60–73.3 V - Breakdown threshold range ensuring reliable turn-on during overvoltage events |
| VC @ IPPM=16A | 96.3 V - Clamped voltage seen by protected circuit under 1500W transient (10/1000μs) |
| PPK | 1500 W - Peak pulse power handling capacity per single non-repetitive surge |
| IR @ VWM | <1 μA - Minimal leakage current preserving low-power standby integrity |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Response time | <1.0 ps - Near-instantaneous junction response to ESD and fast transients |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative transients relative to cathode reference |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive transients relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced degradation per J-STD-020 Level 1 |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) |
| Halogen-free construction | Meets IEC 61249-2-21, supporting RoHS-compliant and environmentally controlled manufacturing |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Power Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and ground to clamp surges before reaching downstream regulators and microcontrollers. Use Value: Limits clamped voltage to 96.3V at 16A, preventing damage to 36V-rated DC-DC converters and CAN transceivers. | Use Scenario: Shielding analog/digital I/O channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on each signal line to absorb fast EFT bursts (IEC 61000-4-4) and lightning-induced surges. Use Value: Sub-1ps response ensures clamping occurs before sensitive ADC inputs or optocoupler drivers experience overstress. |
| LED Driver Surge Suppression | AC-DC Adapter Input Protection |
Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from relay-controlled strings. IC Role / Device Role / Timing Role: TVS placed across driver output terminals to shunt energy from coil de-energization pulses. Use Value: 1500W peak power rating absorbs 8.3ms half-sine surges up to 200A IFSM without degradation. | Use Scenario: Front-end protection of offline SMPS input rectifiers against mains-borne surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Bidirectional device across bridge rectifier output to clamp differential-mode transients before bulk capacitor. Use Value: Symmetrical VBR (60–73.3V) and VC (96.3V) ensure balanced clamping regardless of surge polarity on AC-derived rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA (Bourns) | 600W PPK rating, same VWM/VBR/VC specs but lower surge capacity | Preferred for space-constrained designs where 600W suffices and SMB footprint is required | Select when board area is limited and peak surge energy does not exceed 600W |
| P6SMB54CA (Littelfuse) | 600W PPK, identical VWM/VBR/VC, DO-214AA (SMB) package, higher RθJA (70°C/W) | Used in cost-sensitive consumer power supplies where thermal margin allows larger derating | Choose when leveraging existing SMB layout and lower-cost sourcing is prioritized over 1500W headroom |
Compared with SMBJ54CA and P6SMB54CA, the SMCJ54CA delivers 2.5× higher peak pulse power (1500W vs. 600W) in the larger DO-214AB package - making it the preferred choice for automotive and industrial systems requiring robust ISO 7637-2 compliance without thermal derating penalties.
Availability
SMCJ54CA is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, LED driver protection, and AC-DC adapter front-end surge suppression requiring stable component supply and long-term lifecycle continuity.
Supply support for SMCJ54CA 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, and rectifiers with global AEC-Q101 qualified production lines.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and transportation systems demanding ISO 7637-2 and AEC-Q101 reliability.
FAQ
What is the clamping voltage of SMCJ54CA at its rated peak pulse current?
The SMCJ54CA has a maximum clamping voltage (VC) of 96.3 V at 16 A peak impulse current (IPPM), measured under the standard 10/1000 μs double-exponential surge waveform. This value ensures protected circuits remain below critical overvoltage thresholds during 1500W transients. The SMCJ54CA's clamping performance is validated per ANSI/IEEE C62.35 and forms the basis for safe margining in 48V and 60V system designs.
Is SMCJ54CA unidirectional or bidirectional, and how is polarity indicated?
The SMCJ54CA is a bidirectional TVS diode, confirmed by the "CA" suffix per Taiwan Semiconductor's ordering nomenclature and electrical specifications applying identically in both directions. Unlike unidirectional variants (e.g., SMCJ54A), it has no cathode band marking and requires no polarity orientation during placement - simplifying PCB layout and eliminating risk of reverse installation. This symmetry is essential for protecting AC-coupled or floating bus lines.
Does SMCJ54CA meet automotive transient immunity standards?
Yes, the SMCJ54CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b - covering load dump, battery disconnection, and switching noise events common in 12V/24V vehicle electrical systems. Its 1500W peak power rating, fast <1ps response, and guaranteed clamping behavior under defined waveforms make it suitable for AEC-Q101 stress-tested automotive modules, including body control units and infotainment power supplies.
What is the thermal resistance profile of SMCJ54CA, and how does it affect PCB layout?
The SMCJ54CA has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and junction-to-case (RθJC) of 10°C/W, measured in the DO-214AB (SMC) package. These values require adequate copper pour (≥100 mm² per pad) and thermal vias under the terminals to maintain TJ ≤150°C under repeated surges. Layouts must avoid narrow traces or isolated pads that impede heat dissipation - especially critical in enclosed automotive enclosures where ambient temperatures exceed 85°C.
How does SMCJ54CA differ from SMCJ54A in terms of electrical performance and application use?
The SMCJ54CA is bidirectional with symmetric VBR (60–73.3 V) and VC (96.3 V) in both polarities, while the SMCJ54A is unidirectional - featuring a cathode band and conducting only during positive transients. The SMCJ54CA replaces two unidirectional devices in AC or floating applications, reducing BOM count and layout complexity. Its absence of polarity marking also eliminates assembly errors, making it preferred for differential signal lines and transformer-coupled interfaces.
SMCJ54CA 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- 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)
SMCJ54CA FAQ
1.How can I place an order for SMCJ54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54CA 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 SMCJ54CA reliable?
The price and inventory of SMCJ54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54CA is usually 5 days.
3.What payment methods are accepted for SMCJ54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54CA?
SMCJ54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54CA 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 SMCJ54CA?
For technical support, including SMCJ54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54CA requirements.
6.How does Aetrix verify that SMCJ54CA is sourced from the original manufacturer or authorized distributors?
All SMCJ54CA 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 SMCJ54CA meets industry standards.
7.What is the process for return or replacement of SMCJ54CA?
All SMCJ54CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54CA, 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 SMCJ54CA part is unused and in its original packaging.
Return procedure for SMCJ54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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