TLP521-4 Equivalent & Substitute Parts

Part Overview

The TLP521-4 is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation up to 5300Vrms across four independent channels in a 16-DIP package. The device is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across isolation voltage, channel configuration, output characteristics, and package specifications.

Substiute Parts

TLP521-4

Isocom Components 2004 LTDIn Stock: 23126TLP521-4 Datasheet

Current PartRFQ

ISP521-4X

Isocom Components 2004 LTDIn Stock: 2080ISP521-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP521-4 is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5300Vrms (mandatory match)
• Channel Configuration: 4 channels (mandatory match)
• Output Type: Transistor output (mandatory match)
• Package Type: 16-DIP (0.300", 7.62mm) (mandatory match)
• Current Transfer Ratio Range: 50% to 600% @ 5mA (mandatory match)
• Maximum Output Voltage: 55V (mandatory match)
• Maximum Output Current per Channel: 50mA (mandatory match)
• Vce Saturation: 400mV maximum (mandatory match)
• Operating Temperature Range: -30°C to 100°C (mandatory match)
• Compliance Status: RoHS3 Compliant, REACH Unaffected (mandatory match)

The ISP521-4X meets all specified parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The ISP521-4X is a direct parametric equivalent to the TLP521-4. Both components are manufactured by Isocom Components 2004 LTD and maintain identical electrical specifications across all critical parameters including isolation voltage, channel count, output characteristics, and operating temperature range. Both parts carry Active product status and meet RoHS3 compliance requirements with REACH unaffected designation. Selection between these parts may be determined by packaging format (TLP521-4 standard packaging versus ISP521-4X tube packaging) and inventory availability. The ISP521-4X is suitable for direct substitution in applications where the TLP521-4 is specified.

Frequently Asked Questions (FAQ)

Q: Can ISP521-4X replace TLP521-4 in existing designs?

A: Yes. The ISP521-4X is a parametric equivalent with identical electrical and mechanical specifications. Direct substitution is supported without circuit modification.

Q: What is the difference between TLP521-4 and ISP521-4X?

A: The primary difference is packaging format. TLP521-4 uses standard packaging while ISP521-4X is supplied in tube packaging. All electrical parameters, isolation voltage, channel configuration, and output characteristics are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both TLP521-4 and ISP521-4X are ROHS3 Compliant with REACH Unaffected status.

Q: What isolation voltage do these optoisolators provide?

A: Both parts provide 5300Vrms galvanic isolation across four independent channels.

Q: Can these parts be used in high-temperature applications?

A: Both parts operate across the temperature range of -30°C to 100°C. Application-specific thermal management should be evaluated based on circuit requirements.

Q: What is the maximum output current per channel?

A: The maximum output current per channel is 50mA for both TLP521-4 and ISP521-4X.