Diodes Incorporated DPC817L-B-TR-V

Overview

DPC817L-B-TR-V from Diodes Incorporated is a high-isolation, surface-mount phototransistor coupler in SLM-4 package with CTR rank B (130–260% at IF = 5 mA, VCE = 5 V), 5000 VRMS input-output isolation voltage, and -55°C to +110°C operating temperature range; used for feedback control in isolated DC-DC converters and I/O signal level shifting in industrial PLCs.

For engineers reviewing the DPC817L-B-TR-V datasheet, DPC817L-B-TR-V pinout, DPC817L-B-TR-V application, or DPC817L-B-TR-V equivalent, key selection criteria include CTR consistency across temperature, VDE/UL/VDE safety certification status, SLM-4 footprint compatibility with automated assembly, and saturation voltage performance under 1 mA load current.

Technical Context

This optocoupler integrates a GaAs infrared LED emitter and a silicon NPN phototransistor in a single-molded, halogen-free, RoHS-compliant SLM-4 package. Its internal structure provides galvanic isolation between input and output circuits without requiring external biasing components.

The device operates with forward current up to 60 mA and supports collector-emitter voltages up to 35 V. It delivers guaranteed CTR ≥130% at 5 mA input, with VCE(SAT) ≤0.2 V at IC = 1 mA, enabling direct interface with low-voltage logic and microcontroller GPIOs.

Key Specifications

Pinout & Package

SLM-4 package: 4-pin surface-mount, gull-wing leads, 2.54 mm pitch, 11.50 mm × 7.62 mm body length × width, 3.50 mm height (A2), matte tin-plated terminals compliant with MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phototransistor coupler applications.

Compared with TLP281-4 and PC817XNIP0X, DPC817L-B-TR-V uniquely combines VDE+UL dual certification, SLM-4 surface-mount form factor, and guaranteed CTR rank B in a single RoHS/halogen-free package-making it optimal for space-constrained, safety-certified industrial power and control designs.

Availability

DPC817L-B-TR-V is available at Aetrix Electronics and suitable for industrial PLC I/O modules, isolated DC-DC feedback networks, and smart meter communication interfaces requiring stable component supply, long-term lifecycle assurance, and certified safety compliance.

Supply support for DPC817L-B-TR-V 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 industrial isolation applications demanding safety certification, wide temperature operation, and consistent CTR performance across production lots.

FAQ

What is the maximum recommended forward current for continuous operation?

The absolute maximum forward current (IF) is 60 mA, but Diodes specifies 20 mA as the maximum recommended continuous operating current per the Electrical Characteristics table. Operating above 20 mA accelerates LED degradation and reduces CTR lifetime stability; typical design practice uses 5–10 mA for feedback applications to ensure >10-year reliability at 85°C ambient.

Does DPC817L-B-TR-V support AC input signals?

No - the input side contains only a GaAs LED with unidirectional conduction. To interface with AC signals, an external bridge rectifier or series diode must be added to ensure forward-biasing of the LED during positive half-cycles. The device does not contain internal AC-coupling circuitry or bidirectional input capability.

How does the SLM-4 package differ mechanically from SL-4?

SLM-4 has a longer body (11.50–12.10 mm vs. SL-4's 9.86–10.46 mm) while sharing identical lead pitch (2.54 mm), width (7.62 mm), and terminal geometry. This extended length accommodates higher creepage/clearance distances required for 5000 VRMS isolation in surface-mount form, verified by Diodes' internal comparative testing per IEC 60664-1.

Is there a recommended minimum load resistance for the output transistor?

Yes - Diodes recommends RL ≥ 100 Ω for specified response time (18 µs) and saturation voltage (≤0.2 V). Lower values increase switching speed but risk exceeding the 150 mW collector power dissipation limit at VCE = 5 V; for 3.3 V logic interfacing, a 4.7 kΩ pull-up is typical to maintain noise immunity while staying within safe operating area.