PC3Q64 Equivalent & Substitute Parts

Part Overview

The PC3Q64 is a 4-channel optoisolator with transistor output manufactured by Sharp Microelectronics, rated for 2500Vrms isolation voltage. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across a temperature range of -30°C to 100°C and is packaged in a 16-SOIC surface mount configuration.

Substiute Parts

PC3Q64

Sharp MicroelectronicsIn Stock: 1850PC3Q64 Datasheet

Current PartRFQ

TCMT4600

Vishay Semiconductor Opto DivisionIn Stock: 24029TCMT4600 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PC3Q64 is determined by the following critical parameters:

• Channel Configuration: 4-channel transistor output optoisolator
• Isolation Voltage: Minimum 2500Vrms (substitute must meet or exceed this specification)
• Output Specifications: Maximum output voltage and current per channel (35V, 50mA)
• Package Compatibility: 16-SOIC surface mount form factor
• Input Type: AC/DC compatible input
• Operating Temperature Range: -30°C to 100°C minimum

The TCMT4600 qualifies as a substitute because it maintains the same channel count, package footprint, and output current rating while exceeding the isolation voltage requirement and providing enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The TCMT4600 is the qualified substitute for the obsolete PC3Q64 based on the following factors:

Product Status: The PC3Q64 is obsolete, while the TCMT4600 maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance: The TCMT4600 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The PC3Q64 is RoHS non-compliant.

Electrical Compatibility: The TCMT4600 exceeds the isolation voltage specification (3750Vrms vs. 2500Vrms) and provides a wider operating temperature range (-40°C to 100°C vs. -30°C to 100°C). Output current per channel remains equivalent at 50mA.

Package Compatibility: Both components use identical 16-SOIC surface mount packaging, enabling direct PCB layout compatibility without redesign.

Performance Enhancement: The TCMT4600 provides higher maximum output voltage (70V vs. 35V) and documented current transfer ratio specifications, offering improved design margin for isolation applications.

Frequently Asked Questions (FAQ)

Q: Can the TCMT4600 directly replace the PC3Q64 on existing PCBs?

A: Yes. Both components share identical 16-SOIC package dimensions and pinout compatibility. No PCB layout modifications are required for mechanical or electrical fit.

Q: What are the key differences between these parts?

A: The TCMT4600 provides higher isolation voltage (3750Vrms vs. 2500Vrms), higher maximum output voltage (70V vs. 35V), wider operating temperature range (-40°C to 100°C vs. -30°C to 100°C), and is actively produced with current compliance certifications. The PC3Q64 is obsolete.

Q: Are there any electrical parameter concerns when substituting?

A: The TCMT4600 exceeds all critical electrical specifications of the PC3Q64. The higher Vce saturation (300mV vs. 200mV) and forward voltage (1.35V vs. 1.2V) are minor increases that do not impact standard isolation circuit designs. Verify application-specific requirements for saturation voltage if used in switching applications with tight voltage margins.

Q: Does the TCMT4600 require different circuit design considerations?

A: No. The TCMT4600 maintains the same 4-channel transistor output configuration, AC/DC input compatibility, and 50mA per-channel output current rating. Existing circuit designs require no modification.

Q: What is the inventory status of these parts?

A: The PC3Q64 has 1796 pieces in stock as new original inventory. The TCMT4600 has 23970 pieces in stock, providing superior supply availability for production requirements.