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Vishay General Semiconductor - Diodes Division SMCJ54AHE3/9AT
- Part No.:
- SMCJ54AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54AHE3/9AT.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,281
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Product details
Overview
SMCJ54AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) 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 voltage (VBR) at 1 mA, 87.1 V maximum clamping voltage (VC) at 17.2 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ54AHE3/9AT datasheet, SMCJ54AHE3/9AT pinout, SMCJ54AHE3/9AT application, or SMCJ54AHE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), and real-world design context for surge protection layout and reliability validation.
Technical Context
The SMCJ54AHE3/9AT operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 60.0–66.3 V breakdown threshold, clamping transients to ≤87.1 V within nanoseconds. Its glass-passivated junction ensures stable leakage (<1.0 µA at 54 V) and low incremental surge resistance, enabling repeatable protection under repetitive 10/1000 µs surges up to 17.2 A.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL level 1 (260 °C reflow peak) and supports automated placement. The cathode band identifies polarity, and its RoHS-compliant matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
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 systems. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown window ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 87.1 V at 17.2 A - Clamping voltage during 10/1000 µs surge; determines protected IC's maximum stress exposure. |
| PPPM | 1500 W - Peak transient energy handling capacity; enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-line). |
| TJ max. | +150 °C - Maximum junction temperature rating supports operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; used to calculate temperature rise under 6.5 W steady-state dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, 2-terminal device with cathode band marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); molded compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 48 V rail); polarity band confirms orientation for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports high-energy surge suppression per IEC 61000-4-5 without derating at 25 °C ambient. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power inputs. |
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly lines. |
| Matte tin-plated leads | Guarantees reliable solder joint formation per J-STD-002 and eliminates whisker risk (JESD 201 Class 2). |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed microcontroller power inputs in body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VCC and GND, activated within <1 ns upon overvoltage detection. Use Value: Limits transient voltage to ≤87.1 V, preventing latch-up or gate oxide damage in 5 V/3.3 V logic downstream of DC-DC converters. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-mode protector on input side of optocoupler isolation barrier, conducting only during >54 V transients. Use Value: Maintains <1.0 µA leakage at 54 V, ensuring clean logic thresholds while surviving repeated 1 kV/500 A surge events. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
|
Use Scenario: Safeguarding -48 V telecom rectifier outputs and backplane distribution against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary-level TVS on bulk supply rail, coordinated with upstream fuses and secondary-stage polymer PTCs. Use Value: Delivers 1500 W clamping capability with 75 °C/W thermal resistance, enabling compact heatsink-free PCB layout in dense line cards. |
Use Scenario: Protecting PWM gate drive signals (e.g., to MOSFET half-bridges) from cross-talk and Miller-induced voltage spikes in BLDC motor inverters. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on isolated gate driver output, referenced to local source potential. Use Value: Achieves <100 pF typical junction capacitance at zero bias, minimizing signal edge degradation in 100 kHz+ switching applications. |
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 (DO-214AA) package, same VWM/VBR/VC specs. | Reduced surge margin; suitable only for lower-energy threats (IEC 61000-4-5 Level 2). | Select when board space is constrained and peak surge energy does not exceed 600 W. |
| SMCJ54CAHE3/9AT | Bidirectional variant; identical VWM (54 V), symmetric clamping in both polarities; same PPPM and package. | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN bus). | Choose for bidirectional protection needs; not interchangeable without circuit review due to polarity behavior. |
Compared with SMCJ54AHE3/9AT, SMBJ54AHE3/52T offers smaller footprint but halved surge capacity, while SMCJ54CAHE3/9AT provides polarity-agnostic clamping at full 1500 W - making the original optimal for cost-sensitive, unidirectional 48 V DC rail protection with AEC-Q101 assurance.
Availability
SMCJ54AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, and telecom DC power inputs requiring stable component supply, AEC-Q101 traceability, and 1500 W surge resilience.
Supply support for SMCJ54AHE3/9AT 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series was developed for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and 1500 W pulse handling are mandatory.
FAQ
What is the clamping voltage of the SMCJ54AHE3/9AT at its rated peak pulse current?
The SMCJ54AHE3/9AT has a maximum clamping voltage (VC) of 87.1 V at 17.2 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ54AHE3/9AT maintains this clamping performance across its qualified operating temperature range of –55 °C to +150 °C.
Is the SMCJ54AHE3/9AT qualified for automotive applications?
Yes, the SMCJ54AHE3/9AT carries AEC-Q101 qualification, confirmed by Vishay's documentation and ordering code suffix "HE3". This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC standards. The SMCJ54AHE3/9AT is explicitly designated for use in automotive ECUs, body control modules, and ADAS power supplies where reliability under thermal and electrical stress is critical.
What is the thermal resistance and how does it affect PCB layout for the SMCJ54AHE3/9AT?
The SMCJ54AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value directly impacts steady-state temperature rise: at 6.5 W dissipation, junction temperature rises ~488 °C above ambient - underscoring that RθJA applies only to pulsed conditions. For continuous operation, derating is required; the SMCJ54AHE3/9AT is intended for transient, not steady-state, power dissipation.
How does the SMCJ54AHE3/9AT differ from the bidirectional SMCJ54CAHE3/9AT?
The SMCJ54AHE3/9AT is unidirectional with cathode-band polarity marking and conducts only during reverse overvoltage, while the SMCJ54CAHE3/9AT is bidirectional with no polarity marking and clamps symmetrically in both directions. Both share identical VWM (54 V), PPPM (1500 W), and SMC package, but the SMCJ54AHE3/9AT cannot replace the CA version in AC or floating circuits without redesign. Their breakdown voltages also differ slightly: SMCJ54AHE3/9AT is 60.0–66.3 V, whereas SMCJ54CAHE3/9AT is specified at ±60.0–±66.3 V.
What packaging and reel options are available for the SMCJ54AHE3/9AT?
The SMCJ54AHE3/9AT ships in 13-inch plastic tape-and-reel format with a base quantity of 3500 units per reel (package code "9AT"). It uses RoHS-compliant matte tin-plated leads and meets JESD 201 Class 2 whisker resistance. The "HE3" suffix denotes AEC-Q101 qualification and commercial-grade RoHS compliance. No tube or tray options are listed for this specific variant in Vishay's official ordering table.
SMCJ54AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMCJ54AHE3/9AT FAQ
1.How can I place an order for SMCJ54AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54AHE3/9AT 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 SMCJ54AHE3/9AT reliable?
The price and inventory of SMCJ54AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ54AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54AHE3/9AT?
SMCJ54AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54AHE3/9AT 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 SMCJ54AHE3/9AT?
For technical support, including SMCJ54AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ54AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ54AHE3/9AT 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 SMCJ54AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ54AHE3/9AT?
All SMCJ54AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54AHE3/9AT, 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 SMCJ54AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ54AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54AHE3/9AT Tags
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