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Vishay General Semiconductor - Diodes Division SMCJ54CAHM3/I
- Part No.:
- SMCJ54CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54CAHM3/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
SMCJ54CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (VBR at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 87.1 V at 17.2 A IPPM, and operates from –55 °C to +150 °C - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ54CAHM3/I datasheet, SMCJ54CAHM3/I pinout, SMCJ54CAHM3/I application, or SMCJ54CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and compatibility with 10/1000 µs surge waveforms per IEC 61000-4-5.
Technical Context
This device functions as a voltage-clamped crowbar during transients, leveraging an avalanche junction to limit reverse voltage across protected circuits. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints in AC-coupled or differential signal paths.
Designed for high-energy surge immunity, it delivers low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching spikes and ESD events. Thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation under repeated surge stress when mounted on 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 60.0 V / 66.3 V at 1 mA - guaranteed avalanche onset window defining turn-on consistency |
| VC at IPPM | 87.1 V at 17.2 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized waveform |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
SMCJ54CAHM3/I is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present; both terminals are functionally symmetric. The device mounts with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursions; electrically identical to Cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Accepts surge current during negative voltage excursions; electrically identical to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, and ungrounded interfaces without polarity concerns |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEMs |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during surges, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without moisture sensitivity handling restrictions |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping protector placed directly at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 12 V/24 V system transients up to 1500 W, meeting AEC-Q100 stress test requirements. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across isolated 24 V DC inputs to prevent false triggering and component failure. Use Value: Clamps 10/1000 µs surges to ≤87.1 V while surviving >1000 cycles at rated power, extending field service life. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on data line pairs, coordinated with GDT or polymer PTC for multi-stage protection. Use Value: Fast <1 ns response captures initial surge edge; 87.1 V clamping prevents PHY damage during IEC 61000-4-5 4 kV tests. | Use Scenario: Secondary-side overvoltage clamp on 54 V output rails of switched-mode power supplies for smart home hubs. IC Role / Device Role / Timing Role: Fail-safe crowbar that activates only during abnormal overvoltage events (e.g., feedback loop failure). Use Value: Withstands 1500 W peak surges without degradation, ensuring end-product safety certification compliance (UL 62368-1). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC54CA | Lower PPPM (600 W), same VWM and VBR range, SOD-123FL package | Not suitable for high-energy surges; limited to low-power signal lines | Select when board space is constrained and surge threat level is ≤600 W |
| SMCJ54AHE3/I | Unidirectional version, same VWM/VBR/PPPM, commercial-grade (non-AEC-Q101), RoHS-compliant E3 suffix | Requires polarity-aware layout; not qualified for automotive under-hood use | Select for cost-sensitive industrial applications where bidirectionality is unnecessary |
Compared with SAC54CA and SMCJ54AHE3/I, the SMCJ54CAHM3/I uniquely combines 1500 W surge rating, bidirectional symmetry, and AEC-Q101 qualification - making it the only option among the three validated for harsh automotive environments requiring zero-polarity dependency and high-energy immunity.
Availability
SMCJ54CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter secondary-side clamping requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ54CAHM3/I 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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in demanding environments; its design prioritizes consistent clamping, thermal robustness, and automotive qualification for mission-critical electronic systems.
FAQ
What is the clamping voltage of SMCJ54CAHM3/I at its rated peak pulse current?
The SMCJ54CAHM3/I has a maximum clamping voltage (VC) of 87.1 V at its rated peak pulse current (IPPM) of 17.2 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ54CAHM3/I maintains this clamping performance across its full operating temperature range.
Is SMCJ54CAHM3/I suitable for automotive applications?
Yes, SMCJ54CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It is specifically intended for use in automotive subsystems such as body control modules, ADAS sensor interfaces, and infotainment power rails where sustained operation at +125 °C junction temperature and immunity to load dump transients are required. The SMCJ54CAHM3/I meets all stress test requirements defined in AEC-Q101 Rev D.
How does the bidirectional configuration of SMCJ54CAHM3/I affect PCB layout?
The bidirectional configuration of SMCJ54CAHM3/I eliminates polarity marking and allows placement across any two-node interface without orientation constraints - simplifying layout for differential signals (e.g., RS-485, CAN), AC-coupled lines, or floating grounds. Unlike unidirectional TVS diodes, the SMCJ54CAHM3/I requires no cathode band alignment, reducing assembly errors and enabling automated placement on either side of a connector. Its symmetrical terminal behavior is confirmed in the Vishay datasheet Document Number 88394.
What is the thermal resistance of SMCJ54CAHM3/I, and how does it impact derating?
The SMCJ54CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. These values directly determine power derating above 25 °C ambient: for example, at 85 °C ambient, the maximum allowable continuous power drops to ~3.5 W. Derating curves in Figure 2 of the Vishay datasheet 88394 must be applied to ensure SMCJ54CAHM3/I remains within its 150 °C TJ limit during repetitive surge events.
Does SMCJ54CAHM3/I require special handling during reflow soldering?
No, SMCJ54CAHM3/I is rated MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, meaning it can be processed using standard lead-free reflow profiles without dry-pack or baking requirements. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the molding compound meets UL 94 V-0 flammability. The SMCJ54CAHM3/I is fully compatible with automated SMT assembly lines used for automotive and industrial PCB manufacturing.
SMCJ54CAHM3/I 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:
- -
- Bidirectional Channels:
- 1
- 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:
- 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)
SMCJ54CAHM3/I FAQ
1.How can I place an order for SMCJ54CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54CAHM3/I 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 SMCJ54CAHM3/I reliable?
The price and inventory of SMCJ54CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ54CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54CAHM3/I?
SMCJ54CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54CAHM3/I 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 SMCJ54CAHM3/I?
For technical support, including SMCJ54CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54CAHM3/I requirements.
6.How does Aetrix verify that SMCJ54CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ54CAHM3/I 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 SMCJ54CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ54CAHM3/I?
All SMCJ54CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54CAHM3/I, 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 SMCJ54CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ54CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54CAHM3/I Tags
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