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Taiwan Semiconductor Corporation SMCJ54AH
- Part No.:
- SMCJ54AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54AH.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,700
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Product details
Overview
SMCJ54AH 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), 60–66.3V breakdown voltage (VBR), and 87.1V maximum clamping voltage (VC) at 18A peak pulse current - designed for automotive-grade ESD and surge protection in power supply inputs and data lines.
For engineers reviewing the SMCJ54AH datasheet, SMCJ54AH pinout, SMCJ54AH application, or SMCJ54AH equivalent, this device is selected for AEC-Q101-compliant systems requiring ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity, sub-1ps response time, <1µA leakage above 10V, and robust thermal performance (RθJC = 10°C/W).
Technical Context
The SMCJ54AH employs a glass-passivated silicon junction optimized for fast transient suppression in unidirectional configurations. Its clamping behavior is defined by a 10/1000µs waveform per REA standards, with peak pulse power rated at 1500W for tp = 1ms and derated linearly above 25°C ambient.
It operates across -55°C to +150°C junction temperature range, supports 200A non-repetitive forward surge (IFSM), and maintains <1µA reverse leakage at VWM = 54V - meeting J-STD-020 Level 1 moisture sensitivity and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 60 V / 66.3 V - breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 87.1 V at 18 A - clamped voltage during 10/1000µs surge, limiting downstream stress |
| PPK | 1500 W - peak pulse power handling capability under standardized 1ms pulse |
| IR @ VWM | <1 µA - minimal leakage ensures low standby power loss and signal integrity |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial environments |
| RθJC | 10 °C/W - low junction-to-case thermal resistance supports high-power transient dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.210g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS placement |
| Cathode | Clamping terminal | Marked with band; connected to protected line (e.g., 54V rail or signal); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Sub-1ps response time | Enables suppression of ESD events before sensitive ICs experience damage (e.g., CAN/LIN transceivers) |
| Glass-passivated junction | Improves long-term reliability and stability of VBR under thermal cycling and humidity exposure |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamping |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before LDOs or MCUs. Use Value: Limits clamping voltage to 87.1V at 18A, preventing damage to 60V-rated input stages while maintaining AEC-Q101 compliance. |
Use Scenario: 48V telecom or factory automation power supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge shunt on main DC input, coordinated with upstream fuses and common-mode chokes. Use Value: 1500W peak power rating handles 10/1000µs transients without degradation; RθJC = 10°C/W enables reliable thermal recovery. |
| Automotive CAN Bus Line Protection | Consumer Equipment AC/DC Adapter Output Clamping |
Use Scenario: CAN_H/CAN_L lines in body control modules subjected to ESD and coupled noise. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to ground, leveraging fast <1ps response. Use Value: Sub-1µA leakage at 54V stand-off preserves bus biasing; clamping below 90V protects ISO 11898-2 transceivers. |
Use Scenario: Secondary-side 54V output of medical or industrial SMPS where overvoltage must be limited. IC Role / Device Role / Timing Role: Final-stage clamping element after regulation, guarding against feedback loop failure or rectifier faults. Use Value: Precise 54V VWM aligns with system nominal output; 87.1V VC ensures downstream 100V-rated capacitors remain within derating limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ54A | Same DO-214AC (SMA) package; 87.1V VC @ 17.3A; slightly lower PPK (400W) | Lower power rating limits use to sub-500W surge environments; not AEC-Q101 qualified | Select when cost-sensitive consumer designs require basic ESD protection without automotive qualification |
| ON Semiconductor 1.5SMC54A | DO-214AB (SMC) package; identical VWM/VBR/VC specs; AEC-Q101 qualified; 1500W PPK | Functionally aligned but differs in marking code and minor thermal resistance (RθJC = 11°C/W vs. 10°C/W) | Drop-in alternative where Taiwan Semiconductor supply continuity is constrained; verify layout compatibility via footprint tolerance check |
Compared with SMCJ54AH, SMAJ54A offers lower surge capacity and no automotive qualification, while 1.5SMC54A matches key electrical and qualification specs with near-identical thermal performance - making it the strongest functional alternative for AEC-Q101 designs requiring same-package replacement.
Availability
SMCJ54AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial power supplies, CAN bus interfaces, and medical-grade DC-DC outputs requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ54AH 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 automotive-qualified components.
The SMCJ54AH belongs to TSC's AEC-Q101-certified SMCJ(A)H series - engineered specifically for high-reliability transient suppression in automotive and industrial systems demanding ISO 7637-2 compliance and extended temperature operation.
FAQ
What is the clamping voltage of the SMCJ54AH and how is it measured?
The SMCJ54AH has a maximum clamping voltage (VC) of 87.1 V, measured at 18 A peak pulse current (IPPM) using a 10/1000 µs double-exponential waveform per REA standards. This value reflects worst-case voltage seen by downstream circuitry during standardized surge events and is guaranteed across the full operating temperature range.
Is the SMCJ54AH suitable for bidirectional transient protection?
No - the SMCJ54AH is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications, Taiwan Semiconductor specifies the SMCJ54AH variant with 'CH' or 'CAH' suffix (e.g., SMCJ54CH), which provides symmetrical clamping in both directions and different VBR/VWM relationships.
Does the SMCJ54AH meet automotive qualification standards?
Yes - the SMCJ54AH is AEC-Q101 qualified and tested per the full stress test schedule, including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model ESD (HBM). It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for automotive electrical system immunity.
What is the thermal resistance profile of the SMCJ54AH?
The SMCJ54AH has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient resistance (RθJA) of 55°C/W under standard PCB mounting conditions. These values enable effective heat transfer to heatsink pads or copper planes, supporting repeated 1500W surge events with adequate thermal recovery time.
How does the SMCJ54AH differ from the standard SMCJ54H variant?
The SMCJ54AH features tighter breakdown voltage tolerance (60–66.3 V vs. 60–73.3 V for SMCJ54H) and lower clamping voltage (87.1 V vs. 96.3 V), resulting in improved protection margin for 54V systems. Both share identical package, power rating, and qualification status, but SMCJ54AH is optimized for higher-precision clamping applications.
SMCJ54AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 18A
- 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)
SMCJ54AH FAQ
1.How can I place an order for SMCJ54AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54AH 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 SMCJ54AH reliable?
The price and inventory of SMCJ54AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54AH is usually 5 days.
3.What payment methods are accepted for SMCJ54AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54AH?
SMCJ54AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54AH 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 SMCJ54AH?
For technical support, including SMCJ54AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54AH requirements.
6.How does Aetrix verify that SMCJ54AH is sourced from the original manufacturer or authorized distributors?
All SMCJ54AH 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 SMCJ54AH meets industry standards.
7.What is the process for return or replacement of SMCJ54AH?
All SMCJ54AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54AH, 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 SMCJ54AH part is unused and in its original packaging.
Return procedure for SMCJ54AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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