TLP521-4XGBSM Equivalent & Substitute Parts

Part Overview

The TLP521-4XGBSM is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-pin surface mount device provides galvanic isolation up to 5300Vrms across four independent channels, making it suitable for applications requiring electrical isolation between input and output circuits. The part is currently in active production status with 20,900 units available in inventory. Alternative models may be required due to supply constraints, design revisions, or specific application requirements.

Substiute Parts

TLP521-4XGBSM

Isocom Components 2004 LTDIn Stock: 21003TLP521-4XGBSM Datasheet

Current PartRFQ

ISP521-4XGBSM

Isocom Components 2004 LTDIn Stock: 761ISP521-4XGBSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLP521-4XGBSM is determined by strict alignment of the following critical parameters:

• Number of channels: 4 channels required
• Voltage isolation rating: 5300Vrms minimum
• Current transfer ratio range: 100% to 600% @ 1mA
• Output type: Transistor output configuration
• Maximum output voltage: 55V
• Maximum output current per channel: 50mA
• Maximum Vce saturation: 400mV
• Package type: 16-SMD, Gull Wing surface mount
• Operating temperature range: -30°C to 100°C minimum
• Compliance: ROHS3 compliant, MSL Level 1

The ISP521-4XGBSM meets all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

The ISP521-4XGBSM is a direct parametric equivalent to the TLP521-4XGBSM. Both parts are manufactured by Isocom Components 2004 LTD and share identical electrical specifications, isolation ratings, channel configuration, and package geometry. Both parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity classification, ensuring compatibility with standard manufacturing and storage protocols.

Selection between these parts should be based on availability and supply chain requirements. The TLP521-4XGBSM currently has higher inventory availability (20,900 units) compared to the ISP521-4XGBSM (697 units). Both parts are in active production status and suitable for new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can the ISP521-4XGBSM be used as a direct replacement for the TLP521-4XGBSM in existing designs?

A: Yes. The ISP521-4XGBSM is a parametric equivalent with identical electrical characteristics, isolation voltage, channel count, output ratings, and package configuration. No circuit modifications are required for substitution.

Q: Are there any differences in compliance or environmental ratings between these parts?

A: No. Both parts carry identical ROHS3 compliance status and MSL Level 1 moisture sensitivity classification. Both are REACH unaffected and carry the same ECCN and HTSUS classifications.

Q: What is the significance of the different series designations (TLP521-4 vs ISP521-4)?

A: The series designation reflects internal product line organization within Isocom Components 2004 LTD. The electrical and mechanical specifications remain identical across both series variants.

Q: Are the timing characteristics identical between both parts?

A: Rise and fall times are identical (4µs, 3µs). Turn-on and turn-off time specifications are provided for the TLP521-4XGBSM (3µs, 3µs) but not documented for the ISP521-4XGBSM. Both parts meet the same functional performance requirements for quad-channel optoisolation applications.

Q: What factors should determine which part to select?

A: Selection should be based on supply availability and lead time requirements. The TLP521-4XGBSM offers higher inventory availability. Both parts are in active production and suitable for immediate use in new designs and production applications.