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Taiwan Semiconductor Corporation SMDJ54CA
- Part No.:
- SMDJ54CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ54CA.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,281
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Product details
Overview
SMDJ54CA from Taiwan Semiconductor is a bidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with a working stand-off voltage of 54 V, breakdown voltage range 60.0–66.3 V, and clamping voltage of 87.1 V at 34.4 A peak pulse current. It protects telecom and industrial power rails against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the SMDJ54CA datasheet, SMDJ54CA pinout, SMDJ54CA application, or SMDJ54CA equivalent, key selection criteria include bidirectional clamping performance, 3000 W peak pulse power rating, 175 °C maximum junction temperature, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and DO-214AB mechanical compatibility for high-reliability automotive and industrial PCB layouts.
Technical Context
The SMDJ54CA employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps), enabling effective suppression of sub-nanosecond ESD events and microsecond-scale surge pulses per IEC 61000-4-2 and ISO 7637-2. Its bidirectional configuration provides symmetrical clamping in both polarities without external polarity management.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, supporting sustained operation up to 175 °C junction temperature. The device meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance, ensuring robustness in automated SMT assembly and harsh environments.
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 voltage tolerance band; ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM=34.4 A | 87.1 V - Clamping voltage under 10/1000 µs surge; limits downstream IC stress during 3000 W transient events. |
| PPK | 3000 W - Peak pulse power handling per 1 ms waveform; supports automotive load-dump and industrial surge immunity testing. |
| IPPM | 34.4 A - Peak pulse current at rated clamping voltage; determines minimum trace width and fuse coordination in protection circuits. |
| TJ max | 175 °C - Maximum junction temperature; enables reliable operation in under-hood or enclosed industrial enclosures. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 × 6.22 mm footprint and 2.3 mm height; compatible with IPC-7351B SMC-C_7110X622N. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional symmetry means no functional polarity marking required for SMDJ54CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals serve identical clamping roles; no directional installation required on PCB - simplifies layout and reduces assembly errors. |
| Case / Body | Thermal and mechanical interface | Exposed copper slug under center pad provides primary thermal path to PCB copper; requires ≥100 mm² thermal pad for full 3000 W derating. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables <1.0 ps response time and stable VBR over 1000+ surge cycles without parameter drift. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive electronic module protection including CAN/LIN bus nodes and power supply inputs. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; supports standard J-STD-020-compliant SMT lines without dry-pack handling. |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental regulations for industrial and consumer end-equipment without compromising surge robustness. |
| 175 °C junction rating | Supports operation in high-ambient environments such as motor drives, solar inverters, and railway control cabinets. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Primary bidirectional clamping element placed at board-level input connector. Use Value: Limits voltage to ≤87.1 V during 3000 W ISO 7637-2 Pulse 5a events, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at terminal block entry point. Use Value: Clamps 1 kV/500 A surge (10/1000 µs) within 1 ns, preserving signal integrity and eliminating false triggering of optocouplers. |
| Telecom Base Station Power | Renewable Energy Inverter DC Link |
Use Scenario: Shielding 48 V telecom rectifier outputs and backplane power rails from lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across +48 V and return, adjacent to bulk capacitors. Use Value: Absorbs 3000 W energy without failure, maintaining system uptime during Category C lightning test per IEC 61000-4-5. | Use Scenario: Protecting high-voltage DC link monitoring circuits in solar string inverters exposed to grid switching transients. IC Role / Device Role / Timing Role: Clamp device connected between DC+ and DC− near sensor front-end. Use Value: Maintains 54 V working margin while clamping to 87.1 V, ensuring isolation amplifier survival during 6 kV surge tests. |
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 (Littelfuse) | Same 54 V VWM, 87.1 V VC, but lower PPK = 1500 W; DO-214AB package with identical footprint. | Rated for lower-energy transients only; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4. | Select when cost sensitivity outweighs peak surge requirement and system transients are limited to ESD/inductive kickback. |
| 1.5KE54CA (ON Semiconductor) | Through-hole TO-218 package; same VWM/VC specs but higher RθJA (100 °C/W); 3000 W rating applies only at TA = 25 °C. | Requires manual soldering or wave soldering; incompatible with high-density SMT layouts and automated assembly lines. | Choose only for legacy through-hole designs or prototyping where thermal derating margins allow. |
Compared with SAC54CA and 1.5KE54CA, the SMDJ54CA delivers full 3000 W surge capability in a surface-mount DO-214AB package with superior thermal resistance (RθJL = 15 °C/W), making it the preferred choice for automotive-grade, high-volume SMT production requiring ISO 7637-2 compliance and zero rework risk.
Availability
SMDJ54CA is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom base station power, and renewable energy inverter DC link applications requiring stable component supply, long-term lifecycle support, and full compliance with AEC-Q200 stress test requirements.
Supply support for SMDJ54CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability protection devices, rectifiers, and TVS diodes for industrial and automotive markets.
The SMDJ series was developed specifically for surface-mount surge immunity in space-constrained, high-power applications-emphasizing ISO 7637-2 compliance, low clamping ratio, and J-STD-020 level 1 manufacturability.
FAQ
What is the clamping voltage of the SMDJ54CA under maximum rated surge current?
The SMDJ54CA has a maximum clamping voltage (VC) of 87.1 V when subjected to its peak pulse current (IPPM) of 34.4 A under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMDJ54CA maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMDJ54CA unidirectional or bidirectional, and how does that affect PCB layout?
The SMDJ54CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping in both polarities. Unlike unidirectional variants, it has no cathode band marking and requires no orientation during placement. This eliminates polarity-related assembly errors and simplifies layout-engineers can route either terminal to any side of the protected line without functional impact. The SMDJ54CA's bidirectional behavior is confirmed in the electrical specifications table and ISO 7637-2 test reports.
Does the SMDJ54CA meet automotive surge immunity standards?
Yes, the SMDJ54CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in 12 V and 24 V vehicle networks. Its 3000 W peak power rating, fast <1.0 ps response time, and 175 °C junction rating align with AEC-Q200 stress test conditions for transient suppression devices. While not AEC-Q200 certified itself, the SMDJ54CA is widely deployed in automotive modules where full qualification is achieved at the system level using this component. The SMDJ54CA datasheet explicitly references ISO 7637-2 compliance.
What is the thermal resistance profile of the SMDJ54CA, and how does it impact PCB design?
The SMDJ54CA has a junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead resistance (RθJL) of 15 °C/W when mounted on a standard FR-4 PCB with recommended pad layout. To sustain full 3000 W surge capability, designers must provide ≥100 mm² of internal or external copper area connected to both terminals-especially the center thermal pad-to achieve effective heat spreading. The SMDJ54CA's low RθJL enables efficient conduction into the PCB, reducing localized heating during repetitive surge events.
Can the SMDJ54CA replace the SMDJ54A in an existing design?
No-the SMDJ54CA and SMDJ54A are functionally distinct: the "CA" suffix denotes bidirectional operation, while "A" indicates unidirectional. Replacing one with the other without circuit review risks improper clamping during negative transients or forward conduction issues. The SMDJ54CA has symmetrical VBR and VC in both directions, whereas the SMDJ54A clamps only in reverse and conducts forward like a diode. Layout, grounding, and system-level surge testing must be revalidated if substituting the SMDJ54CA for SMDJ54A. Always verify polarity and conduction behavior in the actual application before interchange.
SMDJ54CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 34.4A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ54CA FAQ
1.How can I place an order for SMDJ54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ54CA 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 SMDJ54CA reliable?
The price and inventory of SMDJ54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ54CA is usually 5 days.
3.What payment methods are accepted for SMDJ54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ54CA?
SMDJ54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ54CA 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 SMDJ54CA?
For technical support, including SMDJ54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ54CA requirements.
6.How does Aetrix verify that SMDJ54CA is sourced from the original manufacturer or authorized distributors?
All SMDJ54CA 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 SMDJ54CA meets industry standards.
7.What is the process for return or replacement of SMDJ54CA?
All SMDJ54CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ54CA, 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 SMDJ54CA part is unused and in its original packaging.
Return procedure for SMDJ54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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