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Taiwan Semiconductor Corporation SMCJ54C
- Part No.:
- SMCJ54C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54C.pdf
- Description:
- 1500W, 66.7V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,753
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Product details
Overview
SMCJ54C from Taiwan Semiconductor is a unidirectional 1500W surface-mount 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 pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ54C datasheet, SMCJ54C pinout, SMCJ54C application, or SMCJ54C equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits up to +150°C, moisture sensitivity level 1 compliance, and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMCJ54C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (60–73.3V @ 1mA), delivering sub-1ps response to transients while maintaining <1µA leakage at 54V. Its glass-passivated junction ensures stable breakdown and low capacitance.
Thermal design relies on RθJA = 55°C/W and RθJC = 10°C/W, supporting continuous operation from –55°C to +150°C ambient. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability industrial and automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum DC or RMS voltage the device blocks continuously without conduction |
| VBR min/max | 60 V / 73.3 V @ 1 mA - Ensures reliable turn-on above system operating voltage with margin against tolerance drift |
| VC @ IPPM | 96.3 V @ 16 A - Clamping voltage during 10/1000 µs surge defines worst-case overvoltage seen by protected IC |
| PPK | 1500 W - Peak pulse power rating determines survivability of short-duration transients like ISO 7637-2 Pulse 5a |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments and enclosed industrial enclosures |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 2.54 mm lead pitch and thermal pad compatibility |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional polarity, 0.210 g weight, and UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path; conducts during forward surge (e.g., ESD contact) |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48V rail); avalanches into conduction when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients) - enables drop-in protection in automotive ECUs |
| Glass passivated junction | Stable VBR over lifetime and temperature; eliminates risk of metallization migration under repeated surge stress |
| Sub-1 ps response time | Clamps transients before sensitive downstream logic or analog circuitry can be damaged - critical for CAN/LIN bus node protection |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow - simplifies SMT assembly and reduces manufacturing cost |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green product certification and export compliance |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 48V battery-fed control modules from load dump spikes up to 120V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp overvoltage before it reaches DC-DC converters and microcontrollers. Use Value: Limits peak rail voltage to ≤96.3V during 1500W surge, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: Shielding digital input channels of programmable logic controllers from inductive kickback induced by solenoid or relay coil de-energization. IC Role / Device Role / Timing Role: Bidirectional clamping not applicable; SMCJ54C used in unidirectional configuration across 24V DC input terminals with series impedance. Use Value: Absorbs 16A transient energy within 10/1000µs waveform, holding channel voltage below 100V to avoid false triggering or input stage failure. |
| LED Driver Overvoltage Suppression | Telecom Power Interface Protection |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems exposed to lightning-induced surges on AC mains-derived DC rails. IC Role / Device Role / Timing Role: Mounted at DC input stage to shunt surge current away from buck controller ICs and MOSFET gate drivers. Use Value: Withstands repetitive 1500W pulses and maintains VWM = 54V margin above nominal 48V output, ensuring no false conduction during normal operation. | Use Scenario: Front-end protection of PoE-powered network switches subjected to fast electrical fast transients (EFT) per IEC 61000-4-4. IC Role / Device Role / Timing Role: Placed across primary-side 54V auxiliary supply rail to limit transient overshoot before reaching PMIC and Ethernet PHY. Use Value: Sub-1ps response captures nanosecond-scale EFT bursts, and 96.3V clamping prevents PHY reset or data corruption during immunity testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54A | 600W rating, SMB package (smaller footprint), VBR = 60–66.3V, VC = 87.1V @ 18A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a due to lower PPK | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5kV) |
| 1.5KE54A | Through-hole DO-201 package, same 1500W rating, VBR = 57.8–63.5V, VC = 93.6V @ 16A | Not suitable for automated SMT lines; requires wave solder or hand assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ54A and 1.5KE54A, the SMCJ54C delivers identical clamping performance in a surface-mount DO-214AB package optimized for high-power automotive and industrial reflow processes - balancing surge robustness, manufacturability, and thermal reliability.
Availability
SMCJ54C is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O conditioning, LED driver front-end protection, and telecom power interface hardening requiring stable component supply across multi-year production cycles.
Supply support for SMCJ54C 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, and power devices since 1979.
The SMCJ series belongs to TSC's high-power surface-mount TVS platform, engineered specifically for ISO 7637-2-compliant automotive and harsh-environment industrial transient suppression - emphasizing rugged junction construction, repeatable clamping, and AEC-Q101 readiness.
FAQ
What is the polarity configuration of the SMCJ54C?
The SMCJ54C is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package body. It conducts in reverse bias above VBR and blocks forward current up to VF ≈ 3.5V at 100A. This polarity must be observed during PCB layout to ensure correct clamping direction on positive-rail applications - incorrect orientation renders the SMCJ54C ineffective against negative transients.
Does the SMCJ54C meet AEC-Q101 qualification?
The SMCJ54C is built on Taiwan Semiconductor's AEC-Q101-qualified process and shares test methodology and screening with AEC-Q101-compliant variants in the SMCJ family. While the specific SMCJ54C lot documentation does not carry an explicit AEC-Q101 certificate, its construction - including glass passivation, JESD201 Class 2 whisker resistance, and ISO 7637-2 validation - aligns with AEC-Q101 stress requirements for transient suppressors used in automotive power domains.
What is the maximum peak pulse current (IPPM) rating for the SMCJ54C?
The SMCJ54C has a maximum peak pulse current (IPPM) rating of 16A under the standard 10/1000 µs double-exponential waveform defined in IEC 61000-4-5. This value is derived from its 1500W peak pulse power rating and 96.3V clamping voltage (IPPM = PPK / VC). Derating applies above 25°C ambient per Fig.2 in the datasheet.
Can the SMCJ54C be used in bidirectional configurations?
No - the SMCJ54C is unidirectional only. For bidirectional protection, Taiwan Semiconductor specifies the SMCJ54CA variant (with "CA" suffix), which features symmetrical breakdown in both directions. Using two SMCJ54C devices in anti-parallel is not recommended due to mismatched VBR tolerances and potential thermal imbalance during surge events.
What is the thermal resistance from junction to ambient (RθJA) for the SMCJ54C?
The SMCJ54C has a typical junction-to-ambient thermal resistance (RθJA) of 55°C/W when mounted on a standard 1-inch² copper pad on a 1.6mm FR-4 PCB. This value assumes no internal layer copper and natural convection cooling. Adding thermal vias or increasing copper area reduces RθJA, directly improving sustained surge handling capability and long-term reliability of the SMCJ54C.
SMCJ54C 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ54C FAQ
1.How can I place an order for SMCJ54C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54C 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 SMCJ54C reliable?
The price and inventory of SMCJ54C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54C is usually 5 days.
3.What payment methods are accepted for SMCJ54C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54C?
SMCJ54C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54C 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 SMCJ54C?
For technical support, including SMCJ54C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54C requirements.
6.How does Aetrix verify that SMCJ54C is sourced from the original manufacturer or authorized distributors?
All SMCJ54C 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 SMCJ54C meets industry standards.
7.What is the process for return or replacement of SMCJ54C?
All SMCJ54C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54C, 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 SMCJ54C part is unused and in its original packaging.
Return procedure for SMCJ54C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54C Tags
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