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Vishay General Semiconductor - Diodes Division SMCJ54HE3/9AT
- Part No.:
- SMCJ54HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54HE3/9AT.pdf
- Description:
- TVS DIODE 54VWM 96.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,680
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Product details
Overview
SMCJ54HE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (VBR), 87.1 V clamping voltage (VC) at 17.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ54HE3/9AT datasheet, SMCJ54HE3/9AT pinout, SMCJ54HE3/9AT application, or SMCJ54HE3/9AT equivalent, this device is selected for high-energy surge immunity in AEC-Q101 qualified systems where low clamping voltage, fast response (<1 ns), and stable thermal performance up to 150 °C junction temperature are critical.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 54 V, it avalanches into low-impedance conduction to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown behavior across temperature.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, the SMCJ54HE3/9AT delivers 1500 W peak pulse power handling with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation under repetitive surge conditions in automotive ECUs and industrial PLC I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V nominal systems. |
| VBR @ IT = 1 mA | 60.0–66.3 V - verified avalanche onset range; ensures predictable turn-on without premature conduction. |
| VC @ IPPM = 17.2 A | 87.1 V - clamped voltage during 10/1000 µs surge; limits stress on protected ICs like CAN transceivers or microcontrollers. |
| PPPM | 1500 W - peak pulse power dissipation capability; supports EN 61000-4-5 Level 4 (4 kV) surge testing compliance. |
| IPPM | 17.2 A - peak pulse current at rated clamping voltage; validated with derating above 25 °C per Fig. 2. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without thermal shutdown. |
| Leakage @ VWM | <1.0 µA - ultra-low reverse leakage; prevents measurable power loss in battery-backed or low-quiescent systems. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on body; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes shunt path during overvoltage events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 48 V rail); avalanche conduction initiates here upon overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - required for engine control and ADAS modules. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage across -55 °C to +150 °C; eliminates parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; no baking required pre-assembly. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a/5a); improves protection margin for sensitive analog front-ends. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for industrial and transportation equipment enclosures. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator surge per ISO 16750-2. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground; responds within <1 ns to limit voltage excursion. Use Value: Clamps to 87.1 V at 17.2 A, preventing damage to 60 V-rated DC-DC converters and microcontrollers in ADAS domain controllers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLCs exposed to inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via companion CA variant) or unidirectional rail clamp on 24 V sensor supply lines. Use Value: 1500 W surge rating absorbs multiple 10/1000 µs transients without degradation, extending sensor module field life. |
| Telecom DC Power Feeds | Consumer Device USB Power Ports |
|
Use Scenario: Overvoltage suppression on -48 V telecom rectifier outputs subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary shunt protector upstream of hot-swap controllers and PMICs; coordinated with upstream fuses. Use Value: 87.1 V clamping ensures protected circuits remain below absolute maximum ratings even during worst-case 1500 W surges. |
Use Scenario: Secondary-level surge protection on USB-C PD power delivery inputs in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Final-stage TVS after common-mode chokes and primary MOVs; handles residual differential-mode spikes. Use Value: AEC-Q101 qualification and 1.0 µA leakage support low-power standby modes while maintaining IEC 61000-4-5 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54AHE3/52T | Lower PPPM = 600 W; SMB package (DO-214AA) with higher RθJA = 110 °C/W; same VWM/VC specs. | Suitable for space-constrained consumer PCBs with lower surge exposure (IEC 61000-4-5 Level 2). | Select when board area is limited and peak surge energy does not exceed 600 W. |
| SMCJ54CAHE3/9AT | Bi-directional variant; identical VWM, VBR, VC, and PPPM; symmetric clamping for AC-coupled or floating signal lines. | Required for RS-485, CAN FD, or Ethernet PHY protection where bidirectional transients occur. | Choose for differential bus lines or ungrounded sensors where polarity reversal must be suppressed. |
Compared with SMCJ54HE3/9AT, the SMBJ54AHE3/52T offers smaller footprint but reduced surge capacity, while the SMCJ54CAHE3/9AT provides symmetrical clamping essential for bidirectional data lines - neither is pin-compatible due to differing DO-214AB vs. DO-214AA footprints or polarity marking conventions.
Availability
SMCJ54HE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feed applications requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMCJ54HE3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in demanding environments where AEC-Q101 qualification, low clamping voltage, and stable parametric performance across temperature are mandatory.
FAQ
What is the clamping voltage of the SMCJ54HE3/9AT under maximum rated surge current?
The SMCJ54HE3/9AT has a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current (IPPM) of 17.2 A using the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected downstream circuitry remains below critical voltage thresholds during surge events. The SMCJ54HE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ54HE3/9AT suitable for automotive applications?
Yes, the SMCJ54HE3/9AT is AEC-Q101 qualified and explicitly designed for automotive use cases including engine control units, body electronics, and ADAS modules. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and guaranteed operation from -55 °C to +150 °C. The SMCJ54HE3/9AT meets ISO 16750-2 load dump requirements when properly mounted on recommended copper pad layouts.
How does the SMCJ54HE3/9AT differ from the bi-directional SMCJ54CAHE3/9AT?
The SMCJ54HE3/9AT is unidirectional and protects only against reverse-polarity transients on grounded systems, whereas the SMCJ54CAHE3/9AT provides symmetrical clamping for both polarities - essential for AC-coupled or floating signal lines like CAN or RS-485. Both share identical VWM (54 V), VBR, VC, and PPPM (1500 W), but the SMCJ54HE3/9AT has a cathode band marking and cannot suppress positive transients on non-ground-referenced nodes.
What is the thermal resistance of the SMCJ54HE3/9AT, and how does it affect layout design?
The SMCJ54HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per Vishay's recommended layout. This means PCB copper area directly impacts sustained power handling: reducing pad size increases thermal impedance and lowers allowable surge repetition rate. The SMCJ54HE3/9AT requires adherence to the specified mounting footprint to achieve its rated 1500 W pulse power.
Does the SMCJ54HE3/9AT meet RoHS and halogen-free standards?
Yes, the SMCJ54HE3/9AT carries the HE3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. The molding compound meets UL 94 V-0 flammability rating, and the matte tin-plated leads satisfy JESD 22-B102 solderability and JESD 201 Class 2 whisker resistance requirements. These certifications are documented in Vishay's material category policy and apply to the SMCJ54HE3/9AT without exception.
SMCJ54HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 15.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ54HE3/9AT FAQ
1.How can I place an order for SMCJ54HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54HE3/9AT 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 SMCJ54HE3/9AT reliable?
The price and inventory of SMCJ54HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ54HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54HE3/9AT?
SMCJ54HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54HE3/9AT 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 SMCJ54HE3/9AT?
For technical support, including SMCJ54HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54HE3/9AT requirements.
6.How does Aetrix verify that SMCJ54HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ54HE3/9AT 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 SMCJ54HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ54HE3/9AT?
All SMCJ54HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54HE3/9AT, 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 SMCJ54HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ54HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54HE3/9AT Tags
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