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Diodes Incorporated DPC817D-D-TU
- Part No.:
- DPC817D-D-TU
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-DIP (0.300", 7.62mm)
- Datasheet:
-
DPC817D-D-TU.pdf
- Description:
- PHOTO COUPLER DIP-4 TUBE 100PCS
- Quantity:
- Payment:
- Shipping:
Inventory:1,269
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Product details
Overview
DPC817D-D-TU from Diodes Incorporated is a high-isolation, single-channel phototransistor optocoupler in DIP-4 package, featuring 5000 VRMS isolation voltage, minimum 50% current transfer ratio (CTR) at IF = 5 mA / VCE = 5 V, 35 V C-E breakdown voltage, and operation from −55 °C to +110 °C - used for feedback control in isolated AC/DC switch-mode power supplies.
For engineers reviewing the DPC817D-D-TU datasheet, DPC817D-D-TU pinout, DPC817D-D-TU application, or DPC817D-D-TU equivalent, key selection criteria include CTR rank consistency, UL/VDE safety certification status, thermal derating above 70 °C, and compatibility with 5–20 mA LED drive circuits in closed-loop regulation.
Technical Context
The DPC817D-D-TU integrates an AlGaAs infrared LED coupled to a silicon NPN phototransistor in a single molded DIP-4 package. Its input-output galvanic isolation enables signal transmission across safety barriers without direct electrical connection.
It operates with DC or low-frequency AC input signals, delivering linear CTR response up to 80 kHz bandwidth (−3 dB), with collector-emitter saturation voltage ≤ 0.2 V at IC = 1 mA / IF = 20 mA - supporting efficient switching in feedback paths of isolated flyback converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5000 VRMS - meets reinforced insulation requirements per UL1577 and VDE EN IEC 60747-5-5 for Class I/II AC/DC power supplies. |
| Current Transfer Ratio (CTR) | Min 50% at IF = 5 mA, VCE = 5 V - ensures reliable transistor turn-on under worst-case aging and temperature conditions in feedback loops. |
| Collector–Emitter Breakdown (BVCEO) | 35 V - supports operation with up to 24 V output-side bias in secondary-side regulation circuits. |
| Response Time (Rise/Fall) | ≤ 18 µs - enables stable loop compensation in SMPS operating up to ~500 kHz switching frequency. |
| Operating Temperature | −55 °C to +110 °C - qualified for industrial and extended-temperature automotive auxiliary systems (non-AEC-Q101). |
| Cutoff Frequency | 80 kHz - defines usable bandwidth for analog feedback signals without phase lag-induced instability. |
| Input Forward Voltage | 1.25 V (typ) at IF = 20 mA - determines series resistor value for 3.3 V or 5 V microcontroller GPIO drive. |
Pinout & Package
Package: DIP-4 (Dual In-line Package, 0.3″ wide), lead pitch 2.54 mm, matte tin-plated leads, RoHS-compliant "Green" compound (UL 94V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | LED anode - connect to current-limiting resistor and positive supply; polarity dot marks this pin. |
| 2 | Cathode | LED cathode - connect to ground or active-low driver; reverse voltage rating is only 6 V. |
| 3 | Emitter | Phototransistor emitter - typically grounded on secondary side; sets reference for output logic level. |
| 4 | Collector | Phototransistor collector - connects to pull-up resistor and error amplifier input; sinks up to 50 mA. |
Key Features
| Feature | Design Value |
|---|---|
| High Isolation Voltage | 5000 VRMS - eliminates need for external isolation components in Class II power adapters. |
| Guaranteed CTR Minimum | 50% at 5 mA drive - ensures functional margin after 10+ years of LED degradation in continuous operation. |
| Safety Certifications | UL1577, CQC GB 4943.1-2022, VDE EN IEC 60747-5-5 - enables direct use in certified end-equipment without additional system-level testing. |
| Lead-Free & Halogen-Free | RoHS 3 compliant, <900 ppm Br/Cl, <1000 ppm Sb - satisfies environmental compliance for global consumer electronics shipments. |
| Moisture Sensitivity Level | MSL Level 1 - allows unlimited floor life and standard reflow without baking prior to assembly. |
Applications
| AC/DC Power Supply Feedback | Industrial PLC Input Isolation |
|---|---|
|
Use Scenario: Closed-loop voltage regulation in 5–65 W offline flyback converters. IC Role / Device Role / Timing Role: Primary-side controller receives optically isolated feedback signal from secondary-side error amplifier via phototransistor output. Use Value: Enables precise ±1% output regulation while maintaining 4 mm creepage/clearance and meeting IEC 62368-1 reinforced insulation requirements. |
Use Scenario: 24 V DC digital input module accepting dry-contact or 2-wire sensor signals. IC Role / Device Role / Timing Role: Provides galvanic isolation between field-side wiring and 3.3 V/5 V logic domain of microcontroller or FPGA. Use Value: Prevents ground-loop noise and surge transients (up to 4 kV EFT) from disrupting logic-level sensing in factory automation systems. |
| Motor Drive Enable Interlock | Medical Equipment Signal Isolation |
|
Use Scenario: Safety-critical enable/disable path between human-interface panel and IGBT gate driver stage. IC Role / Device Role / Timing Role: Transmits validated start/stop command across isolation barrier with fail-safe open-collector output. Use Value: Ensures no spurious motor activation during reset or communication fault; supports SIL-2 functional safety architecture when combined with redundancy. |
Use Scenario: Isolating patient-connected analog sensor outputs (e.g., ECG front-end) from USB or Bluetooth host MCU. IC Role / Device Role / Timing Role: Blocks leakage currents below 10 µA while transmitting low-frequency biopotential waveforms (0.05–150 Hz). Use Value: Meets IEC 60601-1 2× MOPP requirement for patient-connected devices without adding complex transformer-based isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phototransistor optocoupler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PC817XNIP0X | CTR min 80% (rank X), same DIP-4 package, but lacks VDE certification and has lower BVCEO (30 V). | Not suitable for 35 V output rails or VDE-mandated medical/industrial equipment. | Select only for cost-sensitive non-certified consumer power adapters where CTR margin > 80% is acceptable. |
| TLP183(TPL,E) | Higher CTR (100–600%), 5000 VRMS isolation, but TO-220-4L package - larger footprint and higher thermal mass. | Requires PCB real estate and thermal relief not needed for DIP-4; better for high-reliability industrial drives. | Choose when >100% CTR is required to reduce LED drive current or extend lifetime in high-temperature enclosures. |
Compared with PC817XNIP0X, DPC817D-D-TU provides guaranteed VDE/UL safety approval and 35 V BVCEO, making it suitable for regulated power supplies with higher output voltages; versus TLP183, it offers smaller DIP-4 footprint and lower assembly cost, though with lower CTR headroom.
Availability
DPC817D-D-TU is available at Aetrix Electronics and suitable for AC/DC power supply feedback, industrial PLC input isolation, and motor drive interlock circuits requiring stable component supply, long-term lifecycle support, and full safety certification traceability.
Supply support for DPC817D-D-TU 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DPC817 Series belongs to Diodes' optocoupler product line, engineered specifically for high-reliability, safety-certified signal isolation in power conversion and industrial control systems - emphasizing robust CTR stability over temperature and long-term LED luminance retention.
FAQ
What is the CTR rank of DPC817D-D-TU?
DPC817D-D-TU is a "D-rank" part, meaning its CTR falls within the 50–600% range per datasheet Table "Rank Table of Current Transfer Ratio". Unlike A/B/C/X/Y ranks, D-rank denotes the base specification grade with minimum 50% CTR at IF = 5 mA and VCE = 5 V - intended for general-purpose designs where wide CTR tolerance is acceptable.
Does DPC817D-D-TU have VDE certification?
No - DPC817D-D-TU carries UL1577 and CQC GB 4943.1-2022 certifications, but not VDE EN IEC 60747-5-5. VDE-rated variants are designated with "-V" suffix (e.g., DPC817D-D-TU-V). For designs requiring VDE approval, the -V version must be selected and verified against latest certificate number on Diodes' quality portal.
Can DPC817D-D-TU replace PC817 in existing designs?
Yes, DPC817D-D-TU is pin-compatible with PC817 and shares identical DIP-4 footprint, pinout, and basic electrical characteristics. However, it offers higher BVCEO (35 V vs. 30 V), guaranteed 5000 VRMS isolation, and broader temperature range (−55 °C to +110 °C), enabling drop-in upgrades in thermally demanding or safety-critical applications.
What is the maximum recommended LED forward current?
The absolute maximum rated forward current is 60 mA, but the device is characterized and optimized for continuous operation at IF = 5–20 mA. Operating above 20 mA accelerates LED degradation and reduces CTR lifetime; for 20 mA drive, VF is typically 1.25 V, requiring a ~135 Ω series resistor from a 5 V source.
DPC817D-D-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- DPC817
- Package/Case:
- 4-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Channels:
- 1
- Voltage - Isolation:
- 5000Vrms
- Current Transfer Ratio (Min):
- 300% @ 5mA
- Current Transfer Ratio (Max):
- 600% @ 5mA
- Turn On / Turn Off Time (Typ):
- -
- Rise / Fall Time (Typ):
- 18µs, 18µs (Max)
- Input Type:
- DC
- Output Type:
- Transistor
- Voltage - Output (Max):
- 35V
- Current - Output / Channel:
- 50mA
- Voltage - Forward (Vf) (Typ):
- 1.25V
- Current - DC Forward (If) (Max):
- 60 mA
- Vce Saturation (Max):
- 200mV
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -55°C ~ 110°C
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 4-DIP
DPC817D-D-TU FAQ
1.How can I place an order for DPC817D-D-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for DPC817D-D-TU 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 DPC817D-D-TU reliable?
The price and inventory of DPC817D-D-TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DPC817D-D-TU is usually 5 days.
3.What payment methods are accepted for DPC817D-D-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DPC817D-D-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DPC817D-D-TU?
DPC817D-D-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DPC817D-D-TU 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 DPC817D-D-TU?
For technical support, including DPC817D-D-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DPC817D-D-TU requirements.
6.How does Aetrix verify that DPC817D-D-TU is sourced from the original manufacturer or authorized distributors?
All DPC817D-D-TU 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 DPC817D-D-TU meets industry standards.
7.What is the process for return or replacement of DPC817D-D-TU?
All DPC817D-D-TU units undergo pre-shipment inspection (PSI). If there is an issue with DPC817D-D-TU, 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 DPC817D-D-TU part is unused and in its original packaging.
Return procedure for DPC817D-D-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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