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Vishay General Semiconductor - Diodes Division SMCJ54AHE3/57T
- Part No.:
- SMCJ54AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54AHE3/57T.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,002
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Product details
Overview
SMCJ54AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features 54 V standoff voltage (VWM), 60.0–66.3 V breakdown voltage (VBR at 1 mA), 87.1 V maximum clamping voltage (VC) at 17.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ54AHE3/57T datasheet, SMCJ54AHE3/57T pinout, SMCJ54AHE3/57T application, or SMCJ54AHE3/57T equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where AEC-Q101 qualification, low clamping ratio, and fast response (<1 ns) are critical.
Technical Context
The SMCJ54AHE3/57T operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.104 %/°C), enabling predictable clamping across -55 °C to +150 °C operating range.
It delivers 1500 W transient suppression capability under standardized 10/1000 µs surge conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), supporting reliable operation on minimum 8.0 mm × 8.0 mm copper pads per terminal without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensuring consistent turn-on behavior across production lots |
| VC @ IPPM | 87.1 V at 17.2 A - Clamped voltage during full-rated 1500 W surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; defines transient energy absorption capacity |
| IPPM | 17.2 A - Peak pulse current corresponding to VC; used for PCB trace sizing and fuse coordination |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
SMCJ54AHE3/57T uses the SMC (DO-214AB) package: a two-terminal surface-mount device with cathode band marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (for unidirectional operation) | Connected to lower-potential side of protected line; carries forward current during fault conditions |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to higher-potential side (e.g., VIN rail); conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies, with extended temperature cycling and humidity testing |
| Low clamping ratio (VC/VBR) | 1.45 (87.1 V / 60.0 V) - Minimizes voltage overshoot during transients, protecting downstream MOSFETs and ICs with tight absolute maximum ratings |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/60% RH; no bake required prior to reflow, reducing manufacturing complexity |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current under thermal stress and humidity exposure |
| RoHS-compliant & halogen-free option | HE3 suffix indicates RoHS compliance; HM3 variant available for strict environmental requirements in EU and Asia markets |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within nanoseconds before they reach LDOs or microcontrollers. Use Value: Withstands 1500 W pulses and maintains VC ≤ 87.1 V, keeping downstream 3.3 V/5 V logic supply inputs within safe operating area. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting transient energy away from precision op-amps and ADC front-ends. Use Value: Low leakage (<1 µA at 54 V) prevents signal offset drift; fast response preserves signal integrity during 8 kV contact ESD (IEC 61000-4-2). |
| DC-DC Converter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding buck converter inputs against induced surges from adjacent switching circuits or external wiring in PoE-powered equipment. IC Role / Device Role / Timing Role: Primary transient suppressor upstream of input filter capacitor and controller IC, absorbing energy before it reaches switching FETs. Use Value: 1500 W rating handles repetitive surges common in shared-rail telecom infrastructure; thermal resistance allows sustained operation at 50 °C ambient. | Use Scenario: Protecting Ethernet PHY interface power pins (e.g., 3.3 V bias rails) from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to local ground, coordinated with common-mode chokes and gas discharge tubes in multi-stage protection schemes. Use Value: AEC-Q101 qualification ensures reliability in outdoor cabinets; DO-214AB footprint supports high-density layout without compromising creepage/clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR specs | Not suitable for high-energy transients like load dump; limited to board-level ESD and low-energy switching noise | Select when space-constrained layouts prioritize footprint over surge rating |
| SMCJ54CAHE3/57T | Bidirectional variant; identical VWM, VBR, VC, and PPPM but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose only if bidirectional protection is mandated by signal topology; otherwise unidirectional offers better cost and layout simplicity |
Compared with SMAJ54A-E3/57T, the SMCJ54AHE3/57T provides 275% higher surge power handling and superior thermal dissipation due to larger SMC package; versus SMCJ54CAHE3/57T, it offers optimized clamping for DC rails with no reverse conduction path, reducing leakage and simplifying grounding strategy.
Availability
SMCJ54AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supply designs requiring stable component supply, AEC-Q101 qualification, and high-reliability transient suppression.
Supply support for SMCJ54AHE3/57T 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 diodes, rectifiers, and protection devices with emphasis on reliability, automotive qualification, and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ISO 7637, IEC 61000-4-5, and ESD events is mandatory.
FAQ
What is the clamping voltage of SMCJ54AHE3/57T at its rated peak pulse current?
The SMCJ54AHE3/57T has a maximum clamping voltage (VC) of 87.1 V at its rated peak pulse current (IPPM) of 17.2 A, measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2.
Is SMCJ54AHE3/57T qualified for automotive applications?
Yes, SMCJ54AHE3/57T is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification covers stress tests including temperature cycling, humidity bias, and high-temperature operating life, making SMCJ54AHE3/57T suitable for under-hood and chassis-mounted automotive electronics per Vishay's documentation.
What is the standoff voltage (VWM) of SMCJ54AHE3/57T and how does it relate to system design?
The standoff voltage (VWM) of SMCJ54AHE3/57T is 54 V - the maximum DC or continuous reverse voltage the device can withstand without entering breakdown. In system design, VWM must exceed the normal operating voltage of the protected line (e.g., 48 V nominal bus) with sufficient margin to avoid leakage or premature conduction, while remaining below VBR to ensure reliable clamping onset.
Does SMCJ54AHE3/57T have a specified junction-to-ambient thermal resistance?
Yes, the SMCJ54AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads). This parameter is critical for estimating temperature rise during sustained power dissipation and verifying safe operation within the -55 °C to +150 °C junction temperature range.
How does the SMCJ54AHE3/57T differ from the bidirectional SMCJ54CAHE3/57T?
The SMCJ54AHE3/57T is unidirectional and conducts only in reverse breakdown, with polarity marked by a cathode band; the SMCJ54CAHE3/57T is bidirectional and clamps symmetrically in both directions with no polarity marking. Both share identical VWM, VBR, VC, and PPPM ratings, but SMCJ54AHE3/57T is intended for DC rail protection, whereas SMCJ54CAHE3/57T suits AC or floating signal lines like CAN or RS-485.
SMCJ54AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 17.2A
- 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)
SMCJ54AHE3/57T FAQ
1.How can I place an order for SMCJ54AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54AHE3/57T 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 SMCJ54AHE3/57T reliable?
The price and inventory of SMCJ54AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ54AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54AHE3/57T?
SMCJ54AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54AHE3/57T 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 SMCJ54AHE3/57T?
For technical support, including SMCJ54AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54AHE3/57T requirements.
6.How does Aetrix verify that SMCJ54AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ54AHE3/57T 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 SMCJ54AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ54AHE3/57T?
All SMCJ54AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54AHE3/57T, 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 SMCJ54AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ54AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54AHE3/57T Tags
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