Diodes Incorporated DPC817S-C-TR

Overview

DPC817S-C-TR from Diodes Incorporated is a high-reliability SL-4 packaged phototransistor output optocoupler with CTR rank C (200–400% at IF = 5 mA, VCE = 5 V), 35 V collector-emitter breakdown voltage (BV_CEO), 5000 V_RMS input-output isolation, and operation across –55 °C to +110 °C - used for feedback control in isolated DC-DC converters and I/O level-shifting in industrial PLC modules.

For engineers reviewing the DPC817S-C-TR datasheet, DPC817S-C-TR pinout, DPC817S-C-TR application, or DPC817S-C-TR equivalent, key selection criteria include verified CTR range, UL/VDE safety certification status, SL-4 footprint compatibility, and guaranteed performance under extended temperature cycling and high-humidity storage conditions.

Technical Context

This optocoupler integrates a GaAs infrared LED emitter and a silicon NPN phototransistor in a single-molded, green, halogen-free package. Its current transfer ratio is defined strictly at IF = 5 mA and VCE = 5 V, with saturation voltage specified at IF = 20 mA / IC = 1 mA (V_CE(SAT) ≤ 0.2 V).

The device meets UL 1577 (5000 V_RMS, 1 min) and VDE EN IEC 60747-5-5 isolation requirements, and its 18 µs rise/fall time (RL = 100 Ω) supports signal transmission up to 80 kHz bandwidth in linear or switching modes.

Key Specifications

Pinout & Package

Package: SL-4 (Surface-Mount Small Outline, 4-pin, gull-wing leads; 9.86 mm × 4.60 mm body, 2.54 mm pitch). Compliant with JEDEC MS-012AC, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phototransistor-output optocoupler applications.

Compared with TLP183(GB-TP,F) and PC817X3NSZ0F, DPC817S-C-TR uniquely delivers VDE EN IEC 60747-5-5 certification in an SL-4 footprint with guaranteed 200–400% CTR - enabling drop-in compliance in next-gen medical and industrial designs without layout or qualification overhead.

Availability

DPC817S-C-TR is available at Aetrix Electronics and suitable for switched-mode power supplies, industrial programmable logic controllers, motor drive gate interfaces, and medical patient monitoring equipment requiring stable component supply across extended temperature and safety certification lifecycles.

Supply support for DPC817S-C-TR 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 centers across Asia and manufacturing in ISO/TS 16949-certified facilities.

The DPC817 Series belongs to Diodes' optocoupler product line, engineered specifically for high-isolation, high-CTR reliability in safety-critical power conversion and industrial control applications - emphasizing regulatory compliance, thermal robustness, and SMT manufacturability.

FAQ

What is the minimum forward current needed to reliably saturate the output transistor?

The phototransistor achieves full saturation (V_CE(SAT) ≤ 0.2 V) with IF ≥ 5 mA at VCE = 5 V, per datasheet test condition. At lower currents (e.g., IF = 2 mA), V_CE(SAT) rises to ~0.4 V - sufficient for logic-level detection but not for low-loss switching. Designers should size the series resistor accordingly using VF = 1.25 V typical at 20 mA.

Does DPC817S-C-TR support bidirectional signal transmission?

No - it is a unidirectional optocoupler with an LED input and phototransistor output. The internal structure lacks reverse-path components; applying voltage to pins 3 or 4 cannot illuminate the LED or generate input-side current. Bidirectional isolation requires separate forward/reverse channels or digital isolators like ADuM1201.

How does the SL-4 package differ mechanically from DIP-4 in PCB assembly?

SL-4 uses gull-wing surface-mount leads (pitch 2.54 mm, body 9.86 mm × 4.60 mm), while DIP-4 has through-hole pins (same pitch, but body 7.62 mm × 4.60 mm and taller profile). SL-4 eliminates drilling, supports reflow soldering, and reduces board space by 35%; its shorter lead length also lowers parasitic inductance in high-speed switching paths.

Can DPC817S-C-TR replace older DPC817D-C-TU in existing designs?

Yes - both share identical electrical specs, CTR rank C (200–400%), and isolation rating. However, SL-4 (S-C-TR) replaces DIP-4 (D-C-TU), requiring PCB footprint revision and reflow instead of through-hole soldering. Thermal resistance differs slightly (SL-4 R_θJA ≈ 120 °C/W vs. DIP-4 ≈ 100 °C/W), so power dissipation margins should be rechecked in high-ambient environments.