TLP521-2XBL Equivalent & Substitute Parts

Part Overview

The TLP521-2XBL is a dual-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 8-DIP through-hole component provides galvanic isolation up to 5300Vrms and is designed for applications requiring electrical isolation between input and output circuits. The part is currently in active production status with 704 units available in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the specified tolerances, ensuring functional interchangeability in circuit applications.

Substiute Parts

TLP521-2XBL

Isocom Components 2004 LTDIn Stock: 766TLP521-2XBL Datasheet

Current PartRFQ

ISP521-2XBL

Isocom Components 2004 LTDIn Stock: 1187ISP521-2XBL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISP521-2XBL qualifies as a parametric equivalent to the TLP521-2XBL based on the following critical substitution criteria:

Electrical Parameters (Must Match):

• Number of Channels: 2
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio (Min): 200% @ 1mA
• Current Transfer Ratio (Max): 600% @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV

Mechanical Parameters (Must Match):

• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Compliance & Status (Must Match):

• Manufacturer: Isocom Components 2004 LTD
• Product Status: Active
• RoHS Status: ROHS3 Compliant

All specified parameters align between the main part and substitute, confirming functional and physical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The ISP521-2XBL is a direct parametric equivalent to the TLP521-2XBL for applications requiring dual-channel optoisolation with 5300Vrms isolation rating and transistor output configuration. Both parts are manufactured by Isocom Components 2004 LTD, maintain active production status, and comply with ROHS3 and REACH requirements. The electrical performance specifications, including current transfer ratio, output voltage and current ratings, saturation characteristics, and operating temperature range, are identical between the two parts. The 8-DIP through-hole package and mounting configuration are equivalent, ensuring direct PCB compatibility. The ISP521-2XBL currently has higher inventory availability (1107 units) compared to the TLP521-2XBL (704 units), which may influence procurement decisions based on lead time and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the ISP521-2XBL be used as a direct replacement for the TLP521-2XBL in existing designs?

A: Yes. The ISP521-2XBL meets all critical electrical and mechanical specifications of the TLP521-2XBL. Both parts feature identical isolation voltage (5300Vrms), current transfer ratio range (200%-600% @ 1mA), output ratings (55V max, 50mA per channel), and 8-DIP through-hole package configuration. Direct PCB substitution is supported without circuit modification.

Q: Are there any differences in performance between these two parts?

A: The ISP521-2XBL does not specify turn-on/turn-off time values, whereas the TLP521-2XBL specifies 3µs for both parameters. Rise and fall times are identical (4µs and 3µs respectively). All other electrical and thermal specifications match exactly. Applications sensitive to switching time characteristics should reference the ISP521-2XBL datasheet for complete timing specifications.

Q: Do both parts have the same package footprint?

A: Yes. Both the TLP521-2XBL and ISP521-2XBL use the 8-DIP (0.300", 7.62mm) through-hole package with identical pin configuration and spacing. PCB layouts designed for one part accommodate the other without modification.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is rated at MSL 1 (unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which part should be selected for new designs?

A: Selection between TLP521-2XBL and ISP521-2XBL should be based on availability, lead time, and supplier preference, as both parts are functionally equivalent. Current inventory shows ISP521-2XBL at 1107 units and TLP521-2XBL at 704 units.