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Taiwan Semiconductor Corporation 5.0SMDJ85A
- Part No.:
- 5.0SMDJ85A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ85A.pdf
- Description:
- 5000W, 99.2V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,466
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Product details
Overview
5.0SMDJ85A 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 137V at 36.5A, and features a 85V working standoff voltage with <1.0ps response time. Used in AC/DC power supplies and industrial control I/O protection.
For engineers reviewing the 5.0SMDJ85A datasheet, 5.0SMDJ85A pinout, 5.0SMDJ85A application, or 5.0SMDJ85A equivalent, key selection criteria include clamping voltage (VC = 137V), breakdown voltage range (94.4–104V), thermal resistance (RθJA = 61°C/W), DO-214AB package compatibility, and unidirectional polarity marking.
Technical Context
This TVS diode employs a stacked-die construction in a DO-214AB (SMC) package to achieve high peak pulse power handling while maintaining low clamping ratio and fast transient response. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device operates across –55°C to +175°C junction temperature range, with thermal performance validated on a 16mm × 16mm copper PCB pad. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements for automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before leakage exceeds 2 µA |
| VBR min/max | 94.4 V / 104 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPP | 137 V - Clamped voltage at 36.5 A peak impulse current; determines protected circuit's maximum transient exposure |
| PPPM | 5000 W - Peak pulse power capability per 10/1000 µs waveform; enables robust lightning/surge immunity |
| TJ max | +175 °C - Maximum junction temperature; supports operation in high-ambient industrial environments |
| RθJA | 61 °C/W - Junction-to-ambient thermal resistance on standard 16 mm² Cu pad; guides heatsinking and layout design |
| αVBR | 0.110 mV/°C - Temperature coefficient of breakdown voltage; used to calculate VBR drift over temperature |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode band polarity indicator, and 0.300 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (unidirectional) | Connected to protected line side; conducts during reverse-biased surge events |
| Cathode | Current exit terminal (unidirectional) | Marked by band; connected toward ground or low-impedance return path for clamping |
Key Features
| Feature | Design Value |
|---|---|
| 5000W peak pulse power | Enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source impedance) |
| Clamping voltage ≤137V at 36.5A | Protects downstream 100V-rated components (e.g., MOSFETs, controllers) from overvoltage damage |
| Response time <1.0 ps | Acts before most semiconductor switching transients propagate, preventing latch-up or gate oxide failure |
| DO-214AB (SMC) package | Supports automated pick-and-place and reflow soldering; compatible with IPC-7351B SMC footprint |
| RoHS & halogen-free | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21 for green electronics manufacturing |
Applications
| Industrial AC/DC Power Supply Input Protection | Programmable Logic Controller (PLC) Digital I/O Protection |
|---|---|
Use Scenario: Protects rectified DC bus against line surges, load dump, and inductive kickback in DIN-rail mounted power supplies. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +VOUT and GND to clamp positive-going transients. Use Value: Limits voltage excursion to ≤137V during 5000W surges, preserving 100V-input DC-DC converters and bulk capacitors. |
Use Scenario: Shields 24V digital input channels from field-wiring ESD and inductive coupling in factory automation systems. IC Role / Device Role / Timing Role: Standoff protection device on each isolated input channel, referenced to local signal ground. Use Value: Prevents false triggering and latch-up in optocoupler input stages during ±4kV contact ESD per IEC 61000-4-2. |
| Motor Drive Control Board DC Link Protection | Telecom Power Shelf Surge Suppression |
Use Scenario: Installed across DC link capacitors in 3-phase inverter drives to absorb regenerative energy spikes and commutation transients. IC Role / Device Role / Timing Role: High-power clamping element parallel to bulk storage capacitor bank. Use Value: Absorbs >5000W pulses without degradation, extending capacitor lifetime and preventing overvoltage shutdown. |
Use Scenario: Mounted at primary DC input of telecom rectifier modules to meet GR-1089-CORE Level 3 surge immunity requirements. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converters and monitoring ICs. Use Value: Clamps 10/1000µs surges to <137V, ensuring uninterrupted operation during 6kV common-mode transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A (ON Semiconductor) | Same DO-214AA package; lower PPPM (600W); VC = 137V at 27.5A | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges | Select only if system-level surge testing is ≤2kV or board space restricts larger SMC footprint |
| SMCJ85A (Littelfuse) | DO-214AB package; identical PPPM (5000W); VC = 137V at 36.5A; tighter VBR tolerance (±5% vs ±6.5%) | Drop-in replacement in layout; higher production volume availability | Preferred for high-reliability telecom or industrial programs requiring extended supply chain continuity |
Compared with SMBJ85A and SMCJ85A, the 5.0SMDJ85A offers matching 5000W surge rating and clamping performance in DO-214AB, but with broader VBR tolerance and Taiwan Semiconductor's qualification for extended temperature operation up to +175°C junction.
Availability
5.0SMDJ85A is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, PLC digital I/O modules, and motor drive control boards requiring stable component supply and full IEC 61000-4-5 compliance.
Supply support for 5.0SMDJ85A 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 5.0SMDJ85A belongs to TSC's high-power SMD TVS family, engineered specifically for industrial-grade surge immunity in harsh environments where extended temperature range and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of the 5.0SMDJ85A under surge conditions?
The 5.0SMDJ85A has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current of 36.5 A under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The 5.0SMDJ85A maintains this clamping performance across its specified junction temperature range.
Does the 5.0SMDJ85A support automated PCB assembly processes?
Yes, the 5.0SMDJ85A is qualified for automated placement and reflow soldering. It complies with J-STD-020 Moisture Sensitivity Level 1, requires no pre-baking, and features matte tin-plated leads that meet J-STD-002 solderability standards. Its DO-214AB (SMC) package is compatible with standard SMT pick-and-place equipment and lead-free reflow profiles.
How does the 5.0SMDJ85A differ from bidirectional TVS diodes?
The 5.0SMDJ85A is unidirectional and functions only during reverse-biased surges - it behaves like a standard diode in forward bias. Unlike bidirectional variants, it does not suppress negative transients on AC lines or differential signals. Its design targets DC power rail and single-polarity I/O protection, offering lower leakage and tighter VBR control than equivalent bidirectional parts.
What is the thermal resistance from junction to ambient for the 5.0SMDJ85A?
The 5.0SMDJ85A has a junction-to-ambient thermal resistance (RθJA) of 61 °C/W when mounted on a standard 16 mm × 16 mm copper pad per JEDEC test conditions. This value assumes no additional heatsinking and guides thermal design for sustained surge duty cycles. For higher reliability, designers should verify board copper area and airflow in actual layouts.
Is the 5.0SMDJ85A compliant with environmental regulations?
Yes, the 5.0SMDJ85A is RoHS compliant per Directive 2011/65/EU and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin plating satisfies JESD201 Class 2 whisker resistance requirements. These qualifications support use in green manufacturing and export-controlled applications.
5.0SMDJ85A 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 36.5A
- 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)
5.0SMDJ85A FAQ
1.How can I place an order for 5.0SMDJ85A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ85A 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 5.0SMDJ85A reliable?
The price and inventory of 5.0SMDJ85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ85A is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ85A?
5.0SMDJ85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ85A 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 5.0SMDJ85A?
For technical support, including 5.0SMDJ85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ85A requirements.
6.How does Aetrix verify that 5.0SMDJ85A is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ85A 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 5.0SMDJ85A meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ85A?
All 5.0SMDJ85A units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ85A, 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 5.0SMDJ85A part is unused and in its original packaging.
Return procedure for 5.0SMDJ85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5.0SMDJ85A Tags
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