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Taiwan Semiconductor Corporation 5.0SMDJ70A
- Part No.:
- 5.0SMDJ70A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ70A.pdf
- Description:
- 5000W, 81.9V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,313
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Product details
Overview
5.0SMDJ70A 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 delivers 5000W peak pulse power at 10/1000μs, clamps transients to 113V at 44.3A, and features a 70V working standoff voltage with <1.0ps response time. It is used in industrial power supplies and telecom interface protection.
For engineers reviewing the 5.0SMDJ70A datasheet, 5.0SMDJ70A pinout, 5.0SMDJ70A application, or 5.0SMDJ70A equivalent, key selection criteria include clamping voltage (VC = 113V), breakdown voltage range (77.8–86.0V), thermal resistance (RθJA = 61°C/W), unidirectional polarity, and DO-214AB (SMC) package compatibility with automated SMT assembly.
Technical Context
The 5.0SMDJ70A employs a stacked-die construction for enhanced surge handling and uses a photo-glass passivated junction to ensure stable breakdown characteristics and long-term reliability under repetitive transients. Its unidirectional configuration provides low-leakage blocking (IIB ≤ 2µA at 70V) and fast avalanche response.
Designed for PCB-mounted operation on 16mm × 16mm copper pads, it achieves RθJL = 16°C/W and operates across –55°C to +175°C junction temperature range. The device complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 77.8 V / 86.0 V - Verified breakdown occurs within this range at 1 mA test current |
| VC @ IPP | 113 V - Clamping voltage at peak impulse current of 44.3 A (10/1000μs waveform) |
| PPPM | 5000 W - Peak pulse power handling capability defines surge robustness in lightning/ESD events |
| TJ max | +175 °C - Maximum junction temperature enables use in high-ambient industrial environments |
| RθJA | 61 °C/W - Thermal resistance determines required PCB copper area for safe power dissipation |
| IIB @ VWM | ≤2 µA - Low leakage preserves signal integrity and minimizes standby power loss |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected line side (e.g., DC input rail); forms low-impedance path to ground during overvoltage |
| Cathode | Current exit during forward conduction; marked with band | Connected to system ground; defines unidirectional clamping direction and polarity-sensitive placement |
Key Features
| Feature | Design Value |
|---|---|
| 5000W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 24–48V DC rails |
| Clamping voltage = 113V | Limits downstream IC stress to safe levels when protecting 70V-rated circuits (e.g., PoE+ PSE controllers) |
| Response time < 1.0 ps | Activates faster than most semiconductor switching transients, preventing latch-up or gate oxide damage |
| DO-214AB (SMC) package | Supports high-volume automated placement and reflow soldering per J-STD-002 standards |
| Stacked die construction | Improves current sharing and thermal distribution under multi-pulse stress, extending service life |
Applications
| Industrial AC/DC Power Supply | Telecom Data Line Protection |
|---|---|
Use Scenario: Protecting secondary-side 48V DC outputs in DIN-rail power supplies against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between output rail and chassis ground to clamp transients before reaching DC-DC converters. Use Value: With VC = 113V and 5000W rating, it prevents overvoltage failure of downstream 100V-rated MOSFETs and controllers without derating. | Use Scenario: Surge suppression on RS-485/RS-422 data lines in outdoor base stations exposed to induced lightning currents. IC Role / Device Role / Timing Role: Bidirectional-capable systems use paired unidirectional devices; 5.0SMDJ70A protects positive rail while complementary part handles negative rail. Use Value: 70V VWM matches common 48V telecom bias rails, and 113V clamping ensures receiver ICs (e.g., THVD1550) remain within absolute maximum ratings. |
| Automated Test Equipment (ATE) Power Rails | Renewable Energy Charge Controllers |
Use Scenario: Safeguarding programmable 60–80V DC power outputs in ATE systems from back-EMF during relay switching and cable disconnect events. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to minimize inductance and maximize clamping effectiveness. Use Value: Fast <1.0ps response and low RθJA (61°C/W) allow reliable operation under repeated 10/1000μs pulses without thermal runaway. | Use Scenario: Overvoltage protection on battery-side terminals of solar charge controllers interfacing with 72V nominal LiFePO₄ battery banks. IC Role / Device Role / Timing Role: Placed between battery input and controller IC to absorb voltage spikes caused by rapid load disconnection or PV array fault clearing. Use Value: 70V VWM aligns with 72V nominal battery systems; 175°C TJmax supports operation in enclosed, high-temperature enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A | Lower peak power (600W vs. 5000W); same DO-214AA package but smaller thermal mass | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy ESD and capacitive discharge events | Select only if surge energy is confirmed ≤600W and board space constraints prohibit DO-214AB |
| SMCJ70A | Same 5000W rating and DO-214AB package; slightly higher VC (115V vs. 113V) and VBR (77.8–86.7V) | Functionally interchangeable in most 70V rail protection; identical thermal and mounting requirements | Valid drop-in alternative where tighter VBR tolerance is not required and minor VC increase is acceptable |
Compared with SMBJ70A and SMCJ70A, the 5.0SMDJ70A offers superior energy handling and tighter clamping (113V), making it optimal for high-reliability industrial power protection where sustained surge exposure is expected-while SMCJ70A serves as a near-equivalent with minimal design impact.
Availability
5.0SMDJ70A is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom data line protection, and renewable energy charge controllers requiring stable component supply and long-term lifecycle support.
Supply support for 5.0SMDJ70A 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 power management, protection, and signal conditioning devices.
The 5.0SMDJ70A belongs to TSC's high-power SMDJ series, engineered specifically for robust transient suppression in harsh industrial and infrastructure environments where reliability under repeated surge stress is critical.
FAQ
What is the clamping voltage of the 5.0SMDJ70A and how is it measured?
The 5.0SMDJ70A has a maximum clamping voltage (VC) of 113 V, measured at a peak impulse current (IPP) of 44.3 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by downstream circuitry during a surge event. The 5.0SMDJ70A maintains this clamping performance due to its stacked-die construction and low dynamic impedance.
Is the 5.0SMDJ70A unidirectional or bidirectional, and how does that affect circuit layout?
The 5.0SMDJ70A is a unidirectional TVS diode, meaning it conducts only when the cathode is more positive than the anode - polarity is marked by a visible cathode band. In layout, this requires correct orientation relative to the protected rail and ground; reversing it results in no clamping action. For bidirectional protection, two 5.0SMDJ70A devices must be used in series-opposing configuration or a dedicated bidirectional part selected.
What is the maximum operating temperature for the 5.0SMDJ70A, and how does it impact PCB design?
The 5.0SMDJ70A supports a junction temperature range of –55°C to +175°C, with thermal performance characterized on a 16 mm × 16 mm copper pad. To maintain reliability under repeated 5000W surges, PCB layout must provide adequate copper area and thermal vias to manage heat - the 5.0SMDJ70A's RθJA of 61°C/W means insufficient copper will cause premature thermal shutdown or degradation.
Does the 5.0SMDJ70A meet RoHS and halogen-free requirements?
Yes, the 5.0SMDJ70A is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads comply with J-STD-002 for solderability. These certifications are verified in TSC's official documentation and supported by material declarations available upon request for the 5.0SMDJ70A.
Can the 5.0SMDJ70A be used in automotive applications?
The 5.0SMDJ70A is not qualified to AEC-Q101 or rated for automotive underhood environments. While its –55°C to +175°C junction range overlaps with some automotive specs, TSC explicitly states these devices are not designed for medical, life-saving, or life-sustaining applications - and automotive safety-critical systems require additional qualification. Use of the 5.0SMDJ70A in automotive contexts is at the designer's risk and unsupported by TSC.
5.0SMDJ70A 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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 44.3A
- 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)
5.0SMDJ70A FAQ
1.How can I place an order for 5.0SMDJ70A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ70A 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 5.0SMDJ70A reliable?
The price and inventory of 5.0SMDJ70A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ70A is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ70A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ70A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ70A?
5.0SMDJ70A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ70A 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 5.0SMDJ70A?
For technical support, including 5.0SMDJ70A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ70A requirements.
6.How does Aetrix verify that 5.0SMDJ70A is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ70A 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 5.0SMDJ70A meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ70A?
All 5.0SMDJ70A units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ70A, 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 5.0SMDJ70A part is unused and in its original packaging.
Return procedure for 5.0SMDJ70A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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