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Vishay General Semiconductor - Diodes Division SMCJ54A-M3/9AT
- Part No.:
- SMCJ54A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54A-M3/9AT.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
SMCJ54A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 54 V standoff voltage (VWM), 60.0–66.3 V breakdown voltage (VBR), 87.1 V clamping voltage (VC) at 17.2 A peak pulse current, and 1500 W peak pulse power rating for 10/1000 µs waveform - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power rails.
For engineers reviewing the SMCJ54A-M3/9AT datasheet, SMCJ54A-M3/9AT pinout, SMCJ54A-M3/9AT application, or SMCJ54A-M3/9AT equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking convention, halogen-free RoHS-compliant construction, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The SMCJ54A-M3/9AT operates as a unidirectional avalanche-clamping device with glass-passivated junction, enabling sub-nanosecond response to voltage transients. Its low incremental surge resistance (typical Rdyn ≈ 0.4 Ω derived from ΔVC/ΔIPPM) ensures minimal voltage overshoot during high-current surges up to 17.2 A.
Thermal performance is defined by RθJA = 75 °C/W (on minimum pad layout) and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The cathode band marking aligns with industry-standard DO-214AB polarity identification for automated placement and board-level verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin for 48 V systems. |
| VBR @ IT = 1 mA | 60.0–66.3 V - Breakdown threshold range; guarantees reliable avalanche initiation without premature conduction. |
| VC @ IPPM = 17.2 A | 87.1 V - Clamped voltage under 10/1000 µs surge; determines maximum stress on downstream protected ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out. |
| IPPM | 17.2 A - Peak surge current capacity at rated clamping voltage; sets minimum trace width and PCB copper area requirements. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with thermal derating above 25 °C. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pads per terminal for thermal management. |
Pinout & Package
SMCJ54A-M3/9AT uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, MSL level 1 compliant, and polarity indicated by a single cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; forms current loop during clamping event. |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 48 V rail); conducts avalanche current toward anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms compliance with JEDEC J-STD-201 Class 2 whisker resistance and environmental regulations for industrial and automotive production. |
| Low incremental surge resistance | ~0.4 Ω (calculated from VC–VBR/IPPM) minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive gate drivers. |
| Fast response time | Sub-nanosecond avalanche turn-on ensures clamping activation before system-level damage occurs in <100 ns events. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates bake-out requirement and simplifies SMT assembly planning. |
| 1500 W peak pulse power | Validated for 10/1000 µs waveform per ANSI/IEEE C62.35; meets IEC 61000-4-5 surge test requirements at system level. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed control modules from load dump and alternator ripple transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges exceeding 54 V. Use Value: Limits transient voltage to ≤87.1 V, preventing damage to MCU power supplies and CAN transceivers operating at 5 V or 3.3 V. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges caused by relay coil de-energization or lightning coupling. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V DC input lines, conducting only during >54 V excursions to divert energy away from optocoupler inputs. Use Value: Enables robust 24 V input stage design meeting IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards without external series impedance. |
| DC-DC Converter Output Protection | Sensor Signal Line Protection |
Use Scenario: Safeguarding isolated 54 V output rails of telecom-grade DC-DC converters from reflected transients originating in downstream loads. IC Role / Device Role / Timing Role: Secondary-side TVS connected across output terminals to absorb short-duration overvoltage spikes generated by transformer leakage inductance. Use Value: Maintains output regulation integrity by limiting post-regulator voltage excursion to 87.1 V, avoiding latch-up in connected FPGAs or ADCs. | Use Scenario: Guarding analog outputs of pressure or temperature sensors in engine control units against cable-borne transients during hot-plug or fault conditions. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) unidirectional TVS placed directly at sensor connector to shunt ESD and burst noise before reaching amplifier front-end. Use Value: Preserves signal fidelity with <0.5 pF parasitic capacitance impact while providing ±15 kV HBM ESD protection per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/61T | Lower PPPM (400 W), SMA package (smaller thermal mass), higher RθJA (110 °C/W) | Not suitable for 1500 W surge events; limited to low-energy ESD or low-duty-cycle transients. | Select only for space-constrained non-automotive designs where full load-dump immunity is not required. |
| SMCJ54AHE3_A/I | AEC-Q101 qualified, same electrical specs and SMC package, E3 suffix (RoHS, non-halogen-free) | Approved for automotive safety-critical ECUs requiring qualification evidence; identical clamping behavior and layout compatibility. | Choose when OEM documentation mandates AEC-Q101 certification, with no change to schematic or PCB footprint. |
Compared with SMCJ54A-M3/9AT, SMAJ54A-E3/61T offers reduced surge capacity and thermal performance but saves board area, while SMCJ54AHE3_A/I provides identical protection with formal automotive qualification - enabling drop-in replacement where compliance reporting is mandatory.
Availability
SMCJ54A-M3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, DC-DC converter output safeguarding, and sensor signal line hardening requiring stable component supply across high-volume production cycles.
Supply support for SMCJ54A-M3/9AT 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for 12 V, 24 V, and 48 V automotive and industrial power systems where robustness and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMCJ54A-M3/9AT at its rated peak pulse current?
The SMCJ54A-M3/9AT has a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current (IPPM) of 17.2 A under the standard 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 SMCJ54A-M3/9AT maintains this clamping performance across its specified operating temperature range from –55 °C to +150 °C.
Is SMCJ54A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SMCJ54A-M3/9AT itself is not AEC-Q101 qualified; it carries the M3 suffix indicating halogen-free RoHS compliance for commercial-grade use. However, the functionally identical SMCJ54AHE3_A/I variant is AEC-Q101 qualified and shares the same electrical characteristics, SMC package, and pinout. For automotive designs requiring formal qualification evidence, engineers should specify SMCJ54AHE3_A/I instead of SMCJ54A-M3/9AT.
How does the SMCJ54A-M3/9AT differ from bidirectional variants like SMCJ54CA?
The SMCJ54A-M3/9AT is unidirectional, meaning it conducts only during positive voltage excursions relative to its cathode-marked terminal, making it ideal for DC rail protection. In contrast, SMCJ54CA is bidirectional and clamps both polarities - suited for AC lines or differential signal pairs. The SMCJ54A-M3/9AT exhibits forward voltage drop (~3.5 V at 100 A) in forward bias, whereas SMCJ54CA has symmetrical breakdown in both directions and no polarity marking.
What is the recommended PCB pad layout for optimal thermal performance of SMCJ54A-M3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal of the SMCJ54A-M3/9AT to achieve the rated 1500 W pulse power and thermal resistance (RθJA = 75 °C/W). Use solid internal or external copper planes connected via multiple thermal vias to inner layers. Avoid narrow traces between the device and pads, and ensure solder mask opening fully exposes the copper to maximize heat dissipation during surge events. The SMCJ54A-M3/9AT must be mounted with the cathode band aligned per DO-214AB orientation.
Can SMCJ54A-M3/9AT be used in parallel to increase surge current handling?
No - SMCJ54A-M3/9AT is not designed for parallel operation due to inherent parameter variation (e.g., VBR tolerance of 60.0–66.3 V) that causes current imbalance and potential thermal runaway. Parallel TVS diodes require matched VBR, identical batch lot tracing, and external current-sharing resistors - none of which are supported or characterized for the SMCJ54A-M3/9AT. For higher surge ratings, select a single higher-power device such as SMCJ64A-M3/9AT or consult Vishay's application note AN1003 on multi-device configurations.
SMCJ54A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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):
- 17.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ54A-M3/9AT FAQ
1.How can I place an order for SMCJ54A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54A-M3/9AT 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 SMCJ54A-M3/9AT reliable?
The price and inventory of SMCJ54A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ54A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54A-M3/9AT?
SMCJ54A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54A-M3/9AT 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 SMCJ54A-M3/9AT?
For technical support, including SMCJ54A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ54A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ54A-M3/9AT 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 SMCJ54A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ54A-M3/9AT?
All SMCJ54A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54A-M3/9AT, 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 SMCJ54A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ54A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54A-M3/9AT Tags
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