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Taiwan Semiconductor Corporation 5.0SMDJ51A
- Part No.:
- 5.0SMDJ51A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ51A.pdf
- Description:
- 5000W, 59.7V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,285
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Product details
Overview
5.0SMDJ51A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and I/O interfaces. It features a 51 V working standoff voltage, 56.7–62.7 V breakdown voltage at 1 mA, 60.7 A peak pulse current (10/1000 µs), 82.4 V maximum clamping voltage, and 5000 W peak pulse power dissipation. It is used in AC/DC power supplies to safeguard downstream regulators and controllers against lightning-induced surges.
For engineers reviewing the 5.0SMDJ51A datasheet, 5.0SMDJ51A pinout, 5.0SMDJ51A application, or 5.0SMDJ51A equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, junction temperature derating above 25°C, DO-214AB thermal performance (RθJL = 16°C/W), and unidirectional polarity indicated by cathode band.
Technical Context
The 5.0SMDJ51A employs a stacked-die construction in a DO-214AB (SMC) package to achieve 5000 W peak pulse power handling with fast sub-1 ps response time. Its unidirectional configuration provides low forward voltage (5 V @ 100 A) and tight VBR tolerance (±5.5% at 1 mA), enabling precise overvoltage thresholding in regulated DC rails.
Thermal design relies on PCB copper pad conduction: RθJA = 61°C/W (on 16 mm × 16 mm Cu pad), RθJC = 17°C/W, and RθJL = 16°C/W. The device operates across –55°C to +175°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before leakage exceeds 2 µA; sets upper limit for protected line nominal voltage. |
| VBR @ IT = 1 mA | 56.7–62.7 V - Breakdown voltage range defining reliable avalanche initiation; ensures consistent turn-on across production lots. |
| VC @ IPP = 60.7 A | 82.4 V - Clamping voltage under 10/1000 µs surge; must remain below absolute max rating of downstream ICs (e.g., <100 V for 100 V-rated controllers). |
| PPPPM | 5000 W - Peak pulse power capability per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing. |
| TJ max | +175°C - Maximum junction temperature; enables operation in high-ambient industrial environments with appropriate PCB thermal relief. |
| RθJL | 16°C/W - Junction-to-lead thermal resistance; determines temperature rise per watt under steady-state conduction (e.g., 100°C rise at 6.25 W). |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.300 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (cathode-banded end is cathode) | Connected to protected line; reverse-biased during normal operation; conducts only during overvoltage events. |
| Cathode | Ground/reference side (marked by band) | Connected to system ground or low-impedance return path; defines polarity and clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| 5000 W peak pulse power (10/1000 µs) | Enables single-device compliance with IEC 61000-4-5 surge immunity up to 4 kV in 2 Ω source impedance systems. |
| Clamping voltage ≤ 82.4 V at 60.7 A | Provides ≥17.6 V margin below 100 V absolute maximum rating of common 100 V MOSFETs and controllers. |
| Fast response time < 1.0 ps | Protects sensitive analog and digital inputs before ESD or surge transients propagate into IC substrate. |
| DO-214AB package with J-STD-020 Level 1 MSL | Supports standard reflow profiles without baking; compatible with high-volume automated SMT assembly. |
| Stacked die construction | Improves power density and thermal uniformity vs. single-die TVS, reducing hot-spot risk under repetitive surges. |
Applications
| AC/DC Power Supply Input Protection | I/O Interface Surge Suppression |
|---|---|
Use Scenario: Installed across primary-side DC bus (e.g., post-bridge rectifier, pre-PFC stage) to absorb lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp limiting transient overvoltage to protect bridge rectifiers, PFC controllers, and bulk capacitors. Use Value: Withstands 5000 W pulses while maintaining clamping below 85 V, preventing catastrophic failure of 100 V-rated silicon devices. | Use Scenario: Placed on RS-485, CAN, or Ethernet PHY data lines to suppress EFT and surge coupling from adjacent cables. IC Role / Device Role / Timing Role: Fast-response shunt protector diverting transient energy to ground before it reaches communication transceivers. Use Value: Sub-1 ps response ensures clamping activation prior to transceiver input damage thresholds (typically <100 ns exposure tolerance). |
| Industrial Motor Drive DC Link | Automotive Body Control Module (BCM) Power Rail |
Use Scenario: Mounted across DC link capacitors in 24 V/48 V motor drives to suppress switching-induced voltage spikes from IGBT/MOSFET turn-off. IC Role / Device Role / Timing Role: Energy-absorbing clamp stabilizing rail voltage during regenerative braking or load dump events. Use Value: 175°C max junction temperature allows direct placement near heat-generating power stages without thermal derating penalties. | Use Scenario: Applied on 12 V battery-fed microcontroller power rails in BCM modules to survive ISO 7637-2 Load Dump pulses. IC Role / Device Role / Timing Role: Primary overvoltage suppression element absorbing 12 V system transients exceeding 60 V for >100 ms duration. Use Value: 51 V VWM matches nominal 12 V automotive systems with sufficient margin for cold-crank dips and alternator regulation overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Lower peak power (600 W), same DO-214AA package, 85.5 V clamping at 7.1 A. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy ESD/EFT scenarios. | Select SMBJ51A only when surge threat level is ≤ Level 2 and board space constraints prohibit DO-214AB. |
| SMCJ51A | Same 5000 W rating and DO-214AB package, but 87.1 V clamping at 57.5 A (higher VC than 5.0SMDJ51A's 82.4 V). | Acceptable where 4.7 V higher clamping voltage is tolerable relative to protected IC ratings. | Choose SMCJ51A if supply chain availability favors ON Semiconductor parts, accepting 4.7 V higher clamping. |
Compared with SMBJ51A and SMCJ51A, the 5.0SMDJ51A delivers superior clamping performance (82.4 V) at full 5000 W rating-critical for protecting 100 V-class power semiconductors-while maintaining identical DO-214AB footprint and thermal metrics.
Availability
5.0SMDJ51A is available at Aetrix Electronics and suitable for AC/DC power supplies, industrial I/O interfaces, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for 5.0SMDJ51A 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including TVS diodes, rectifiers, and MOSFETs.
The 5.0SMDJxxA series was developed specifically for high-reliability industrial and automotive surge protection, emphasizing robustness under repetitive transients, wide temperature operation, and compatibility with automated SMT assembly.
FAQ
What is the maximum clamping voltage of the 5.0SMDJ51A under a 10/1000 µs surge?
The 5.0SMDJ51A has a maximum clamping voltage (VC) of 82.4 V when subjected to its rated peak pulse current of 60.7 A under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and is critical for ensuring protected ICs remain within their absolute maximum voltage ratings during surge events.
Is the 5.0SMDJ51A unidirectional or bidirectional?
5.0SMDJ51A is a unidirectional TVS diode, configured to protect DC circuits with defined polarity. Its cathode band marks the terminal connected to ground or reference potential, and it conducts only during reverse overvoltage conditions-unlike bidirectional variants that protect AC or floating signals.
What package does the 5.0SMDJ51A use, and is it RoHS compliant?
The 5.0SMDJ51A uses the DO-214AB (SMC) surface-mount package and is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its matte tin-plated leads meet J-STD-002 solderability standards, and the molding compound achieves UL 94V-0 flammability rating.
What is the working standoff voltage (VWM) of the 5.0SMDJ51A, and how does it relate to circuit design?
The 5.0SMDJ51A has a working standoff voltage (VWM) of 51 V, meaning it remains non-conductive with leakage <2 µA up to this DC or RMS voltage. Designers select VWM ≥10–20% above the circuit's maximum normal operating voltage-for example, 51 V suits 42 V nominal DC buses in 48 V industrial systems.
Does the 5.0SMDJ51A require derating at elevated ambient temperatures?
Yes, the 5.0SMDJ51A requires thermal derating above 25°C ambient. Its peak pulse power capability decreases per the curve in Figure 1 of the datasheet, and steady-state power dissipation is limited to 6.25 W at TL = 75°C. PCB copper area and airflow directly impact usable surge capacity in real-world layouts.
5.0SMDJ51A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 5.0SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 60.7A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5.0SMDJ51A FAQ
1.How can I place an order for 5.0SMDJ51A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ51A 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 5.0SMDJ51A reliable?
The price and inventory of 5.0SMDJ51A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ51A is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ51A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ51A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ51A?
5.0SMDJ51A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ51A 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 5.0SMDJ51A?
For technical support, including 5.0SMDJ51A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ51A requirements.
6.How does Aetrix verify that 5.0SMDJ51A is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ51A 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 5.0SMDJ51A meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ51A?
All 5.0SMDJ51A units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ51A, 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 5.0SMDJ51A part is unused and in its original packaging.
Return procedure for 5.0SMDJ51A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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