TCET1600G Optoisolator - Equivalent & Substitute Parts

Part Overview

The TCET1600G is a high-voltage optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation in a 4-DIP package and is designed for applications requiring galvanic isolation with AC or DC input capability. The part is currently in Last Time Buy status, making identification of suitable substitutes necessary for long-term design continuity and inventory planning.

Substiute Parts

TCET1600G

Vishay Semiconductor Opto DivisionIn Stock: 5841TCET1600G Datasheet

Current PartRFQ

SFH628A-3X016

Vishay Semiconductor Opto DivisionIn Stock: 8844SFH628A-3X016 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TCET1600G is determined by the following critical parameters:

• Voltage isolation rating of 5300Vrms minimum
• Single-channel transistor output configuration
• 4-DIP through-hole package format (0.400", 10.16mm)
• AC and DC input capability
• Operating temperature range of -55°C to 100°C
• ROHS3 compliance and REACH unaffected status

The SFH628A-3X016 meets all mandatory substitution criteria. Both parts share identical isolation voltage, channel count, output type, package geometry, input flexibility, temperature range, and regulatory compliance. Differences in current transfer ratio specifications and output voltage ratings do not preclude substitution when application requirements fall within the SFH628A-3X016 operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The SFH628A-3X016 is the qualified substitute for TCET1600G applications. Both components are manufactured by Vishay Semiconductor Opto Division and maintain identical regulatory compliance (ROHS3 Compliant, REACH Unaffected). The SFH628A-3X016 carries Active product status, ensuring continued availability and supply chain stability compared to the TCET1600G Last Time Buy designation.

Selection between these parts depends on application-specific requirements for output voltage and current transfer ratio performance. The SFH628A-3X016 provides higher minimum current transfer ratio (100% @ 1mA versus 20% @ 5mA) and lower forward voltage drop (1.1V typical versus 1.25V typical), which may offer improved efficiency in certain circuit topologies. The TCET1600G supports higher maximum output voltage (70V versus 55V), which may be required in specific isolation applications.

Frequently Asked Questions (FAQ)

Q: Can SFH628A-3X016 directly replace TCET1600G in existing designs?

A: Direct replacement is possible when circuit design accommodates the parameter differences. The SFH628A-3X016 maximum output voltage of 55V is lower than TCET1600G (70V). Verify that your application does not require output voltages exceeding 55V. Both parts share identical isolation voltage, package format, and temperature range.

Q: What are the key differences between these optoisolators?

A: Primary differences include current transfer ratio specifications (SFH628A-3X016 minimum 100% @ 1mA versus TCET1600G minimum 20% @ 5mA), maximum output voltage (55V versus 70V), and Vce saturation (400mV versus 300mV). Switching time characteristics are comparable within typical tolerances.

Q: Are both parts suitable for AC and DC input applications?

A: Yes. Both TCET1600G and SFH628A-3X016 support AC and DC input types with identical 5300Vrms isolation voltage and -55°C to 100°C operating temperature range.

Q: What is the significance of Last Time Buy status for TCET1600G?

A: Last Time Buy status indicates the manufacturer will discontinue production. SFH628A-3X016 with Active status provides long-term availability for new designs and ongoing production requirements.

Q: Are package dimensions identical between these parts?

A: Yes. Both components use 4-DIP through-hole packaging with 0.400" (10.16mm) body width, ensuring mechanical compatibility in PCB layouts designed for either part.