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Taiwan Semiconductor Corporation SMDJ54AH
- Part No.:
- SMDJ54AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ54AH.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
SMDJ54AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 54V working stand-off voltage, 60.0–66.3V breakdown voltage at 1mA, and 87.1V maximum clamping voltage at 34.4A peak pulse current. It is AEC-Q101 qualified and designed for automotive and industrial surge protection in power supply rails and interface lines.
For engineers reviewing the SMDJ54AH datasheet, SMDJ54AH pinout, SMDJ54AH application, or SMDJ54AH equivalent, key selection criteria include its DO-214AB (SMC) package, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, 175°C max junction temperature, and unidirectional polarity marking - all critical for ESD and load-switching transient immunity in harsh environments.
Technical Context
The SMDJ54AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient response and stable clamping under repetitive or single-event surges. Its electrical behavior follows standard TVS I-V characteristics: low leakage (<1µA @ 54V), sharp knee at VBR, and well-defined clamping plateau up to 3000W peak power.
Thermally, it features RθJA = 75°C/W and RθJL = 15°C/W, enabling effective heat dissipation in high-density PCB layouts. The device is rated for -55°C to +175°C operating and storage temperature ranges, supporting under-hood automotive and industrial control applications where thermal cycling and long-term reliability are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC/AC rail margin. |
| VBR @ IT=1mA | 60.0–66.3 V - Breakdown voltage range confirming reliable avalanche initiation across production lots. |
| VC @ IPPM=34.4A | 87.1 V - Clamping voltage during 10/1000µs surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPK | 3000 W - Peak pulse power rating per 1ms waveform; enables robust protection against lightning-induced transients. |
| TJ max | +175°C - Maximum junction temperature; supports operation in high-ambient environments without derating. |
| Response time | <1.0 ps - Sub-picosecond junction response ensures suppression before sensitive downstream components experience overstress. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with matte tin-plated leads, J-STD-002 solderable, MSL Level 1. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking for unidirectional polarity; dimensions per JEDEC MS-013AA; weight ≈ 0.290g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse-battery events). |
| Cathode | Avalanche clamping terminal | Marked by band; connected to higher-potential side; enters avalanche breakdown when reverse voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress vs. epoxy-passivated alternatives. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) requirements. |
| Moisture sensitivity level 1 | Enables direct placement without baking; eliminates moisture-related popcorning risk during reflow. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for green manufacturing and export markets. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 48V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 54V while maintaining low leakage during normal operation. Use Value: Limits peak voltage to ≤87.1V during 34.4A transients, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Standoff diode absorbing energy from L·di/dt events on field wiring, triggered within sub-nanosecond response window. Use Value: Withstands ≥3000W peak pulses without degradation, ensuring >100,000 surge cycles in factory automation environments. |
| Telecom DC Power Interface | Consumer Equipment AC/DC Adapter Output |
Use Scenario: Shielding PoE-powered Ethernet switches and base stations from induced surges on 48V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream fuses and common-mode chokes. Use Value: Maintains <1µA leakage at 54V, minimizing standby power loss while delivering 87.1V clamping for EN 61000-4-5 Level 4 compliance. | Use Scenario: Secondary-side surge suppression on 54V output rails of medical-grade AC/DC adapters used in portable diagnostic devices. IC Role / Device Role / Timing Role: Final-stage TVS protecting isolated DC outputs from ESD and conducted transients entering via interconnect cables. Use Value: Halogen-free, RoHS-compliant construction meets IEC 60601-1 safety requirements and eliminates toxic gas emission during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC54 | Lower PPK = 1500W; VC = 93.6V @ 16.1A; same DO-214AB package. | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD and data-line surges. | Select when cost sensitivity outweighs peak power requirement and system-level surge testing is less stringent. |
| 1.5KE56A | Through-hole TO-218 package; PPK = 1500W; VBR = 58.9–65.1V; VC = 93.6V @ 16.1A. | Requires PCB real estate and wave-solder process; incompatible with automated SMT lines. | Choose only if legacy through-hole assembly is mandated or thermal mass requirements exceed SMDJ54AH's capability. |
Compared with SAC54 and 1.5KE56A, the SMDJ54AH delivers double the peak power (3000W), tighter clamping (87.1V vs. ≥93.6V), and full SMT compatibility - making it the preferred choice for next-generation automotive and industrial designs requiring AEC-Q101 validation and high-energy transient immunity.
Availability
SMDJ54AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, and telecom DC interface surge immunity requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMDJ54AH 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, serving global automotive, industrial, and consumer markets since 1979.
The SMDJ series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in automotive power systems and industrial control equipment where ISO 7637-2 compliance and thermal robustness are mandatory.
FAQ
What is the breakdown voltage range of the SMDJ54AH?
The SMDJ54AH has a specified breakdown voltage (VBR) range of 60.0 V to 66.3 V at a test current of 1 mA, measured per JEDEC standards. This range ensures consistent avalanche initiation across production lots and temperature extremes. The SMDJ54AH maintains this specification under TA = 25°C conditions and is validated across its full operating temperature range (-55°C to +175°C). Designers should use the minimum VBR value (60.0 V) for worst-case clamping analysis.
Is the SMDJ54AH suitable for bidirectional transient protection?
No, the SMDJ54AH is a unidirectional TVS diode intended for single-polarity surge suppression. For bidirectional applications, Taiwan Semiconductor offers the SMDJ54CAH variant, which uses a center-tapped dual-diode configuration. The SMDJ54AH features a cathode band marking and must be oriented with cathode toward the higher-potential side of the protected line. Using SMDJ54AH in a bidirectional configuration risks failure during reverse surges.
What is the maximum clamping voltage of the SMDJ54AH under surge conditions?
The SMDJ54AH exhibits a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current of 34.4 A, using the standardized 10/1000 µs waveform. This value is guaranteed across all units and represents the highest voltage seen by downstream circuitry during a full-power transient event. The SMDJ54AH achieves this performance while maintaining <1 µA leakage at its 54 V working stand-off voltage, ensuring minimal impact on normal operation.
Does the SMDJ54AH require special handling during PCB assembly?
No, the SMDJ54AH is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without pre-baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB (SMC) package supports standard pick-and-place and reflow profiles. The SMDJ54AH also passes JESD 201 Class 2 whisker testing, eliminating concerns about tin whisker growth in long-life applications.
Which international standards does the SMDJ54AH meet for automotive applications?
The SMDJ54AH is AEC-Q101 qualified and explicitly meets ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). It is not certified to ISO 16750 or CISPR 25, as those apply to system-level EMC testing. The SMDJ54AH's compliance is verified at the component level per manufacturer test reports, and its 175°C junction rating supports under-hood deployment in modern vehicle architectures.
SMDJ54AH 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:
- 1
- Bidirectional Channels:
- -
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ54AH FAQ
1.How can I place an order for SMDJ54AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ54AH 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 SMDJ54AH reliable?
The price and inventory of SMDJ54AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ54AH is usually 5 days.
3.What payment methods are accepted for SMDJ54AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ54AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ54AH?
SMDJ54AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ54AH 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 SMDJ54AH?
For technical support, including SMDJ54AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ54AH requirements.
6.How does Aetrix verify that SMDJ54AH is sourced from the original manufacturer or authorized distributors?
All SMDJ54AH 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 SMDJ54AH meets industry standards.
7.What is the process for return or replacement of SMDJ54AH?
All SMDJ54AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ54AH, 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 SMDJ54AH part is unused and in its original packaging.
Return procedure for SMDJ54AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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