TLP521-4GBSM Equivalent & Substitute Parts

Part Overview

The TLP521-4GBSM 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 1465 units in stock. Substitute parts are identified based on matching electrical specifications, isolation ratings, channel configuration, and package compatibility to ensure direct functional equivalence in circuit applications.

Substiute Parts

TLP521-4GBSM

Isocom Components 2004 LTDIn Stock: 1490TLP521-4GBSM Datasheet

Current PartRFQ

ISP521-4XGBSM

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

Parametric EquivalentRFQ

TLP521-4XGBSM

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP521-4GBSM are qualified based on the following critical parameters that determine functional equivalence:

• Number of Channels: 4 channels (mandatory match)
• Voltage - Isolation: 5300Vrms (mandatory match)
• Current Transfer Ratio Range: 100% to 600% @ 1mA (mandatory match)
• Output Type: Transistor output (mandatory match)
• Voltage - Output (Max): 55V (mandatory match)
• Current - Output / Channel: 50mA (mandatory match)
• Package / Case: 16-SMD, Gull Wing (mandatory match for PCB compatibility)
• Operating Temperature Range: -30°C ~ 100°C (mandatory match)
• Input Type: DC (mandatory match)
• Mounting Type: Surface Mount (mandatory match)

All identified substitute parts maintain these specifications, ensuring direct functional replacement without circuit redesign or performance degradation.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TLP521-4GBSM, TLP521-4XGBSM, and ISP521-4XGBSM—are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

TLP521-4XGBSM offers the highest inventory availability at 20900 units, providing supply chain flexibility for high-volume applications. TLP521-4GBSM and TLP521-4XGBSM are both members of the TLP521-4 series and share identical timing specifications (Turn On/Turn Off Time and Rise/Fall Time), ensuring equivalent switching performance in time-critical circuits.

ISP521-4XGBSM, while functionally equivalent in all critical electrical parameters, does not specify Turn On/Turn Off Time values. This part remains suitable for applications where switching time specifications are not explicitly required or where the unspecified timing falls within acceptable design margins.

All parts maintain identical isolation voltage (5300Vrms), current transfer ratio range (100-600% @ 1mA), output voltage capability (55V maximum), and channel current rating (50mA per channel), confirming direct functional interchangeability in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can TLP521-4XGBSM be used as a direct replacement for TLP521-4GBSM?

A: Yes. Both parts are members of the TLP521-4 series and share identical electrical specifications, isolation ratings, channel configuration, package type, and operating temperature range. The primary difference is the suffix designation and inventory availability.

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

A: Both parts provide identical isolation voltage (5300Vrms), current transfer ratio (100-600% @ 1mA), output specifications (55V, 50mA per channel), and package configuration (16-SMD, Gull Wing). The ISP521-4XGBSM does not specify Turn On/Turn Off Time values, whereas the TLP521-4GBSM specifies 3µs for both parameters. For applications where switching time is not a design constraint, both parts are functionally equivalent.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All three parts use the 16-SMD, Gull Wing package configuration, ensuring mechanical and electrical compatibility with PCB designs developed for the TLP521-4GBSM without layout modifications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting identical regulatory and environmental requirements.

Q: Which substitute part should be selected for maximum supply availability?

A: TLP521-4XGBSM provides the highest inventory level at 20900 units, offering the greatest supply chain flexibility for production applications requiring large quantities or extended lead time protection.