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Taiwan Semiconductor Corporation SMCJ54CH
- Part No.:
- SMCJ54CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54CH.pdf
- Description:
- 1500W, 66.7V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,411
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Product details
Overview
SMCJ54CH 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-grade ESD and load-dump protection in power supply rails and interface lines.
For engineers reviewing the SMCJ54CH datasheet, SMCJ54CH pinout, SMCJ54CH application, or SMCJ54CH equivalent, key selection criteria include AEC-Q101 qualification, 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 SMCJ54CH uses a glass-passivated silicon junction to achieve fast transient suppression with low capacitance and high reliability under repetitive surge stress. Its unidirectional configuration enables precise anode-cathode polarity alignment for DC rail protection without bidirectional leakage trade-offs.
Designed for automotive and industrial environments, 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 requirements - supporting lead-free reflow assembly and long-term field stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping initiates; sets safe margin below system rail voltage. |
| VBR @ IT=1mA | 60–73.3 V - Breakdown threshold range at 1mA test current; defines minimum clamping onset point. |
| VC @ IPPM=16A | 96.3 V - Clamped voltage during 10/1000μs surge; determines protected circuit's peak overvoltage exposure. |
| PPK | 1500 W - Peak pulse power rating per 1ms waveform; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial locations. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area and heatsinking needs for sustained surge duty. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.210g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | DC return path / ground reference | Connected to system ground or low-side return; completes clamping path during positive transients. |
| Cathode (banded end) | Protected line input | Connected to line being protected (e.g., 48V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS power domains. |
| ISO 7637-2 compliant | Withstands standardized vehicle electrical transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation or failure. |
| Fast response time <1 ps | Clamps within picoseconds of transient onset - critical for protecting sensitive MCU I/O and CAN transceivers. |
| Glass passivated junction | Enhances long-term reliability and humidity resistance versus epoxy-passivated alternatives in harsh environments. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives - suitable for green manufacturing and export-compliant designs. |
Applications
| Automotive Power Rail Protection | Industrial 24/48V DC System Input |
|---|---|
Use Scenario: Protecting 48V battery-fed ECUs against load dump and alternator switching surges in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 48V rail and chassis ground, clamping transients exceeding 54V. Use Value: Limits peak voltage to ≤96.3V during 1500W pulses, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives powered from 24V/48V industrial supplies subject to inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, coordinated with upstream fusing and filtering. Use Value: Withstands ≥1000 surges at rated PPK while maintaining <1µA leakage - ensuring stable operation across decades of field service. |
| Telecom Interface Line Protection | Consumer Equipment DC Adapter Input |
Use Scenario: Shielding RS-485/RS-232 data lines and auxiliary power feeds in base stations and network edge devices exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC bias lines feeding interface ICs, complementing primary front-end protection. Use Value: Sub-1ps response ensures clamping occurs before transient energy couples into signal paths - preserving data integrity. |
Use Scenario: Hardening AC/DC adapter inputs in smart home hubs and set-top boxes against mains-borne transients and ESD events. IC Role / Device Role / Timing Role: First-line transient suppressor on secondary-side DC output, placed before bulk capacitors and LDO regulators. Use Value: 96.3V clamping voltage provides sufficient margin above nominal 54V output while minimizing component count and board space. |
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, higher RθJA ≈ 85°C/W), lower IPPM (8.5A), same VWM/VBR range. | Better suited for space-constrained consumer boards with lower surge exposure; not AEC-Q101 qualified. | Select when board area is critical and surge energy is ≤600W; verify thermal margin under repeated pulsing. |
| TPSMD54A | 1500W rating, same DO-214AB package, but non-AEC-Q101, higher IR (≤5µA), slightly higher VC (98V). | Acceptable for industrial/commercial use where automotive qualification is not required. | Choose for cost-sensitive industrial designs where AEC-Q101 is unnecessary and 2.7V higher clamping is acceptable. |
Compared with SMBJ54A and TPSMD54A, the SMCJ54CH delivers superior automotive-grade reliability (AEC-Q101 + ISO 7637-2), tighter leakage (<1µA), and optimized thermal performance (RθJA = 55°C/W) - making it the preferred choice for mission-critical 48V/54V rail protection where long-term field robustness is mandatory.
Availability
SMCJ54CH is available at Aetrix Electronics and suitable for automotive electronics, industrial power systems, and telecom infrastructure requiring stable component supply with full traceability and lifecycle management.
Supply support for SMCJ54CH 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 high-reliability protection devices, rectifiers, and TVS diodes for automotive and industrial markets.
The SMCJ54CH belongs to TSC's AEC-Q101-qualified SMCJ-H series - engineered specifically for high-energy transient suppression in 12V–170V automotive and industrial DC systems, with emphasis on ISO 7637-2 compliance and long-term parametric stability.
FAQ
What is the polarity configuration of the SMCJ54CH?
The SMCJ54CH is a unidirectional TVS diode, configured with anode and cathode terminals - the cathode is marked by a band on the DO-214AB package. It conducts only during reverse-biased overvoltage events, making it ideal for DC rail protection where polarity is fixed. This differs from bidirectional variants (e.g., SMCJ54CH's counterpart SMCJ54CAH), which protect both polarities but exhibit higher leakage.
Does the SMCJ54CH meet automotive qualification standards?
Yes, the SMCJ54CH is AEC-Q101 qualified and fully compliant with ISO 7637-2 test pulses (1, 2a, 2b, 3a, 3b), confirming its suitability for automotive applications including engine control units, body electronics, and infotainment power supplies. Its glass-passivated junction and JESD201 Class 2 whisker resistance further support under-hood reliability.
What is the maximum clamping voltage of the SMCJ54CH under surge conditions?
The SMCJ54CH has a maximum clamping voltage (VC) of 96.3 V at 16 A peak pulse current (IPPM), measured using the standard 10/1000 μs double-exponential waveform. This value defines the highest voltage seen by downstream components during a full-rated 1500W transient event - critical for ensuring safe operating margins in 48V or 54V systems.
How does the SMCJ54CH compare to the SMCJ54AH variant?
The SMCJ54CH and SMCJ54AH share identical VWM (54 V) and package (DO-214AB), but differ in breakdown voltage: SMCJ54CH specifies VBR min/max = 60–73.3 V, while SMCJ54AH tightens the upper limit to 66.3 V. This narrower VBR window in the 'A' variant improves consistency in clamping onset across production lots - beneficial for designs requiring tighter voltage tolerance.
Can the SMCJ54CH be used in bidirectional protection circuits?
No - the SMCJ54CH is strictly unidirectional and must be used with correct polarity alignment (cathode toward protected line). For bidirectional protection, the designated variant is SMCJ54CAH, which features symmetrical breakdown in both directions and different marking (e.g., GGE for SMCJ54AH vs. GGD for SMCJ54CH). Using SMCJ54CH in reverse-biased AC or floating applications will result in unintended conduction or failure.
SMCJ54CH 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:
- 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)
SMCJ54CH FAQ
1.How can I place an order for SMCJ54CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54CH 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 SMCJ54CH reliable?
The price and inventory of SMCJ54CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54CH is usually 5 days.
3.What payment methods are accepted for SMCJ54CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54CH?
SMCJ54CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54CH 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 SMCJ54CH?
For technical support, including SMCJ54CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54CH requirements.
6.How does Aetrix verify that SMCJ54CH is sourced from the original manufacturer or authorized distributors?
All SMCJ54CH 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 SMCJ54CH meets industry standards.
7.What is the process for return or replacement of SMCJ54CH?
All SMCJ54CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54CH, 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 SMCJ54CH part is unused and in its original packaging.
Return procedure for SMCJ54CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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