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Vishay General Semiconductor - Diodes Division SMAJ54CA-E3/61
- Part No.:
- SMAJ54CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CA-E3/61.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ54CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 54 V standoff voltage (VWM), 60–66.3 V breakdown range (VBR), 87.1 V maximum clamping voltage (VC) at 4.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the SMAJ54CA-E3/61 datasheet, SMAJ54CA-E3/61 pinout, SMAJ54CA-E3/61 application, or SMAJ54CA-E3/61 equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification readiness (via HE3 suffix variants), low thermal resistance (RθJL = 30 °C/W), and UL 497B recognition - critical for robust ESD and lightning-induced transient protection in safety-critical embedded systems.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 54 V), then avalanches rapidly (<1 ns response) when transient voltage exceeds VBR, diverting surge current to ground while limiting downstream voltage to ≤87.1 V. Its bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns.
The SMAJ54CA-E3/61 uses a glass-passivated silicon junction in an SMA (DO-214AC) package, rated for -55 °C to +150 °C operation, with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 solderability standards - enabling reliable reflow assembly in high-volume automotive and industrial PCB production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 60.0–66.3 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 87.1 V at 4.6 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge; determines system-level stress margin |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy-handling capability per transient; validated on 5.0 mm × 5.0 mm copper pads |
| IPPM (Peak Pulse Current) | 4.6 A - Maximum non-repetitive surge current the device safely clamps; directly limits fault energy into load |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments |
| RθJL | 30 °C/W - Junction-to-lead thermal resistance; enables effective heat transfer to PCB copper during repetitive surges |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current input/output path | Both terminals function identically; connects across protected line and ground (or between differential lines) without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating nodes - eliminates need for dual unidirectional devices or external polarity management |
| 400 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V industrial buses and automotive 12 V/24 V power rails |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial signal-line protection per Underwriters Laboratories safety standard - reduces certification burden |
| AEC-Q101 qualification pathway | HE3/M3 suffix variants are AEC-Q101 qualified; E3/61 variant shares identical die and construction - supports automotive-grade design-in with traceable pedigree |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free reflow without pre-baking; suitable for high-throughput SMT lines in Tier 1 automotive electronics manufacturing |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and chassis ground, clamping transients before they reach sensitive interface ICs. Use Value: Limits induced voltage to ≤87.1 V during 4.6 A surges - preserving integrity of 5 V or 3.3 V logic inputs and preventing latch-up in transceiver ICs. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring faults and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Bidirectional clamp across input terminal and common rail, absorbing ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains <1 μA leakage at 24 V nominal, ensuring clean logic thresholds while surviving 400 W transient energy without degradation. |
| DC Power Rail Surge Suppression | Telecom Signal Line ESD Protection |
Use Scenario: Secondary-level surge protection on 48 V telecom power supplies and PoE injectors, downstream of primary MOV/GDT stages. IC Role / Device Role / Timing Role: Fast-response clamping element placed at point-of-load to suppress residual ringwave and fast-rising transients. Use Value: Sub-1 ns response time and 30 °C/W RθJL enable rapid thermal dissipation - sustaining reliability during repeated 10/1000 μs surges up to 4.6 A. |
Use Scenario: Protecting RS-485/RS-232 transceivers and Ethernet PHYs from human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) bidirectional TVS placed across differential pairs or single-ended lines. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 to <±90 V - preventing damage to transceiver ESD structures while maintaining signal integrity. |
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-E3/61 | Unidirectional version; cathode band marked; 87.1 V clamping same, but only conducts in one polarity | Requires correct orientation on PCB; unsuitable for AC or floating signals | Select when protecting DC rails with known polarity and space-constrained layouts needing minimal footprint |
| SMBJ54CA-T | Same VWM/VC specs but in SMB (DO-214AA) package; 600 W PPPM; higher IPPM (7.3 A) | Larger footprint (4.58 mm × 3.94 mm vs. SMA's 4.50 mm × 2.79 mm); better for higher-energy threats | Choose when system-level surge requirements exceed 400 W or when board layout allows larger package for enhanced robustness |
Compared with SMAJ54A-E3/61, the SMAJ54CA-E3/61 eliminates polarity constraints for flexible placement; versus SMBJ54CA-T, it trades peak power headroom for compactness - making it optimal for space-limited automotive and industrial modules where 400 W clamping suffices.
Availability
SMAJ54CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, DC power rail surge suppression, and telecom signal line protection requiring stable component supply, RoHS-compliant sourcing, and full traceability.
Supply support for SMAJ54CA-E3/61 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, automotive qualification, and high-volume manufacturability.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where failure resilience and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMAJ54CA-E3/61 at its rated peak pulse current?
The SMAJ54CA-E3/61 has a maximum clamping voltage (VC) of 87.1 V when subjected to its rated 4.6 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions on 5.0 mm × 5.0 mm copper pads 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.
Is SMAJ54CA-E3/61 suitable for automotive applications?
Yes - SMAJ54CA-E3/61 shares the same die, construction, and qualification-ready platform as AEC-Q101-compliant variants (e.g., SMAJ54CAHE3). While the E3/61 suffix denotes commercial-grade RoHS compliance, its thermal performance (TJ max. = +150 °C), UL 497B recognition, and robust surge handling make it widely deployed in non-safety-critical automotive subsystems including body control modules, infotainment interfaces, and sensor hubs where full AEC-Q101 documentation is not mandated.
How does the bidirectional design of SMAJ54CA-E3/61 affect PCB layout?
The SMAJ54CA-E3/61 has no polarity marking and symmetrical terminal behavior, allowing placement across any two nodes without orientation checks - simplifying layout for differential signals (e.g., RS-485), AC-coupled lines, or floating grounds. Unlike unidirectional TVS diodes such as SMAJ54A-E3/61, it avoids risk of misplacement-induced failure and eliminates need for silkscreen polarity indicators, reducing assembly errors and design review cycles.
What is the thermal resistance from junction to lead (RθJL) for SMAJ54CA-E3/61?
The SMAJ54CA-E3/61 has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W. This low value enables efficient heat transfer from the silicon junction directly into the PCB copper via the device's matte tin-plated leads during repetitive surge events - supporting sustained operation in thermally demanding environments like engine compartments or enclosed industrial enclosures without derating.
Does SMAJ54CA-E3/61 meet any safety certifications?
Yes - SMAJ54CA-E3/61 is Underwriters Laboratory (UL) recognized under standard UL 497B (file E136766) for both unidirectional and bidirectional protectors. This certification validates its suitability for telecom and industrial signal-line protection applications, covering electrical safety, flammability (UL 94 V-0 molding compound), and surge withstand capability - reducing end-product certification effort for designers.
SMAJ54CA-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 4.6A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ54CA-E3/61 FAQ
1.How can I place an order for SMAJ54CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CA-E3/61 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 SMAJ54CA-E3/61 reliable?
The price and inventory of SMAJ54CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ54CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CA-E3/61?
SMAJ54CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CA-E3/61 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 SMAJ54CA-E3/61?
For technical support, including SMAJ54CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ54CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ54CA-E3/61 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 SMAJ54CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ54CA-E3/61?
All SMAJ54CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CA-E3/61, 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 SMAJ54CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ54CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CA-E3/61 Tags
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