My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ54A-E3/9AT
- Part No.:
- SMCJ54A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54A-E3/9AT.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,406
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ54A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (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 a 10/1000 µs waveform - deployed in automotive power modules, industrial PLC I/O protection, and telecom DC-DC converter inputs.
For engineers reviewing the SMCJ54A-E3/9AT datasheet, SMCJ54A-E3/9AT pinout, SMCJ54A-E3/9AT application, or SMCJ54A-E3/9AT equivalent, key selection criteria include clamping performance under 17.2 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and SMC (DO-214AB) surface-mount package compatibility with automated placement.
Technical Context
The SMCJ54A-E3/9AT operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds VBR, diverting transient energy to ground while limiting downstream voltage to ≤87.1 V. Its glass-passivated junction ensures stable leakage (<1.0 µA at 54 V) and fast response time (<1 ns), critical for protecting MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
Thermally, it sustains 150 °C maximum junction temperature with derated pulse capability above 25 °C ambient, and its RθJL of 15 °C/W enables effective heat transfer to PCB copper pads (8.0 mm × 8.0 mm recommended). The device meets MSL Level 1 per J-STD-020 and is rated for 200 A non-repetitive forward surge (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 60.0–66.3 V at 1 mA - Confirmed avalanche initiation range; ensures reliable triggering without premature conduction. |
| VC (Clamping Voltage) | 87.1 V at 17.2 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines IC survival margin. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained transient energy absorption capacity; validates suitability for ISO 7637-2 Pulse 1/2b/5a automotive transients. |
| IPPM (Peak Pulse Current) | 17.2 A - Maximum surge current handled at rated clamping; used to size PCB trace width and grounding paths. |
| TJmax | 150 °C - Maximum junction temperature; sets thermal design limits for board layout and power cycling reliability. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs derating curves for elevated ambient temps. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode (unbanded end) | Reference node / ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like load dump (ISO 16750-2) without cascading failure. |
| 87.1 V clamping at 17.2 A | Provides ≥12 V margin below 100 V-rated MOSFETs or 3.3 V/5 V logic supply rails with external L-C filtering. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT IEC 61000-4-4), improving protection fidelity. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets global environmental compliance requirements without halogen restrictions; suitable for consumer and industrial use. |
Applications
| Automotive Power Distribution | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients up to ±120 V. Use Value: Limits voltage to ≤87.1 V during 1500 W surges, preventing damage to CAN transceivers and MCU power supplies. |
Use Scenario: Shielding 24 V digital input modules from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff protection on optocoupler input side, triggered only during >60 V transients. Use Value: Maintains <1.0 µA leakage at 54 V, ensuring no false triggering during normal 24 V operation. |
| Telecom DC-DC Converter Input | Consumer Appliance Motor Drive Supply |
|
Use Scenario: Safeguarding isolated 48 V telecom power supplies from lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Primary-level clamping device upstream of input filter capacitors and rectifiers. Use Value: Responds in <1 ns to fast-rising edges, reducing stress on downstream electrolytic capacitors and FETs. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to absorb back-EMF energy during PWM commutation. Use Value: Handles 200 A non-repetitive forward surge (8.3 ms), surviving repeated motor startup cycles without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC54A-TB-E3/9AT | Same VWM (54 V), lower PPPM (600 W), higher VC (100 V at 6.8 A) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for load dump or lightning. | Select when cost sensitivity outweighs surge energy requirement and board space allows larger footprint. |
| 1.5KE54A-E3/54 | Same electrical specs but axial DO-15 package; 1000 W PPPM, VC = 87.1 V at 11.5 A | Requires through-hole assembly; incompatible with automated SMT lines and high-density layouts. | Choose only for legacy through-hole designs or prototyping where rework tolerance is prioritized over production efficiency. |
Compared with SAC54A-TB-E3/9AT and 1.5KE54A-E3/54, the SMCJ54A-E3/9AT delivers superior surge handling (1500 W vs. 600 W/1000 W) in a compact SMC package optimized for high-volume SMT manufacturing, while maintaining identical clamping performance at rated current.
Availability
SMCJ54A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC-DC converter inputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ54A-E3/9AT 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, ruggedness, and automotive qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against load dump, EFT, and lightning surges is mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ54A-E3/9AT under standard test conditions?
The SMCJ54A-E3/9AT has a maximum clamping voltage (VC) of 87.1 V when subjected to a 10/1000 µs waveform at 17.2 A peak pulse current. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ54A-E3/9AT maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMCJ54A-E3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
No - the SMCJ54A-E3/9AT carries the E3 suffix, indicating RoHS-compliant commercial grade only. For AEC-Q101 qualification, the correct variant is SMCJ54AHE3_X (e.g., SMCJ54AHE3_A/I), which adds automotive qualification while retaining identical electrical specs. The SMCJ54A-E3/9AT itself is not AEC-Q101 certified and must not be used in safety-critical automotive systems without additional validation.
How does the SMCJ54A-E3/9AT differ from bidirectional variants like SMCJ54CA?
The SMCJ54A-E3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where current flows in one direction. In contrast, SMCJ54CA is bidirectional, lacks polarity marking, and protects AC or dual-polarity signals. Their VWM and VC values differ: SMCJ54A-E3/9AT has 54 V VWM and 87.1 V VC, while SMCJ54CA has symmetric 54 V standoff and higher clamping due to dual-junction architecture. The SMCJ54A-E3/9AT cannot substitute for SMCJ54CA in AC-coupled circuits.
What is the thermal resistance and how does it impact PCB layout for the SMCJ54A-E3/9AT?
The SMCJ54A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout per Vishay spec; reducing pad area increases RθJA, risking thermal runaway during repetitive surges. To maintain reliability, designers must allocate sufficient copper area and avoid narrow traces connecting the SMCJ54A-E3/9AT anode/cathode to ground planes.
Can the SMCJ54A-E3/9AT be used in parallel to increase surge current handling?
No - paralleling SMCJ54A-E3/9AT devices is not recommended due to parameter mismatch (e.g., VBR tolerance ±5 %) causing uneven current sharing and potential thermal runaway. For higher surge ratings, select a single higher-power device (e.g., SMCJ64A-E3/9AT) or implement staged protection with upstream fusing. The SMCJ54A-E3/9AT is characterized and qualified as a standalone unit; its 1500 W rating assumes proper PCB thermal design, not multi-device stacking.
SMCJ54A-E3/9AT 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 (SMCJ)
SMCJ54A-E3/9AT FAQ
1.How can I place an order for SMCJ54A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54A-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ54A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ54A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54A-E3/9AT?
SMCJ54A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54A-E3/9AT 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-E3/9AT?
For technical support, including SMCJ54A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ54A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ54A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ54A-E3/9AT?
All SMCJ54A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ54A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ54A-E3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
