TLP521-2 Equivalent & Substitute Parts

Part Overview

The TLP521-2 is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This dual-channel device provides galvanic isolation rated at 5300Vrms and is designed for applications requiring electrical isolation between input and output circuits. The part is currently in active production status with 4364 units available in inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, supply chain alternatives, or packaging preferences.

Substiute Parts

TLP521-2

Isocom Components 2004 LTDIn Stock: 4443TLP521-2 Datasheet

Current PartRFQ

ISP521-2X

Isocom Components 2004 LTDIn Stock: 1330ISP521-2X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Electrical Parameters (Critical for Function):

• Number of Channels: 2 (identical)
• Voltage - Isolation: 5300Vrms (identical)
• Current Transfer Ratio: 50% to 600% @ 5mA (identical)
• Output Type: Transistor (identical)
• Voltage - Output (Max): 55V (identical)
• Current - Output / Channel: 50mA (identical)
• Vce Saturation (Max): 400mV (identical)
• Operating Temperature: -30°C ~ 100°C (identical)

Mechanical Parameters (Critical for Compatibility):

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

Compliance & Status:

• RoHS Status: ROHS3 Compliant (identical)
• Product Status: Active (identical)
• Manufacturer: Isocom Components 2004 LTD (same manufacturer)

The primary difference is packaging format: TLP521-2 uses standard packaging while ISP521-2X is supplied in tube packaging. This distinction does not affect electrical performance or mechanical fit.

Parameter Comparison

Engineering Selection Recommendations

Both TLP521-2 and ISP521-2X are active products from the same manufacturer with identical electrical and mechanical specifications. Selection between these parts should be based on:

Inventory Availability: TLP521-2 has 4364 units in stock; ISP521-2X has 1227 units in stock.

Packaging Requirements: Choose based on assembly process requirements. Standard packaging (TLP521-2) or tube packaging (ISP521-2X) may affect handling, storage, and automated placement procedures.

Compliance Certification: Both parts meet ROHS3 compliance and are REACH unaffected, suitable for regulated applications.

Supply Chain Continuity: Both parts maintain active production status, ensuring long-term availability for production and replacement needs.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2X be used as a direct replacement for TLP521-2?

A: Yes. All electrical parameters, mechanical dimensions, and compliance certifications are identical. The only difference is packaging format (tube vs. standard). Direct substitution is valid for through-hole PCB assembly applications.

Q: What is the difference between the packaging formats?

A: TLP521-2 uses standard packaging while ISP521-2X is supplied in tube packaging. Both contain the same 8-DIP component with identical lead spacing (0.300", 7.62mm). Tube packaging may be preferred for automated pick-and-place equipment or high-volume assembly operations.

Q: Are both parts suitable for high-isolation applications?

A: Yes. Both TLP521-2 and ISP521-2X provide 5300Vrms isolation rating, meeting requirements for galvanic isolation in industrial control, power supply, and communication interface applications.

Q: What is the current transfer ratio specification?

A: Both parts specify a current transfer ratio range of 50% to 600% at 5mA input current. This parameter defines the ratio of output current to input current and determines the device's optical coupling efficiency.

Q: Are these parts RoHS compliant?

A: Yes. Both TLP521-2 and ISP521-2X are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the maximum output current per channel?

A: Both parts support 50mA maximum output current per channel with a maximum output voltage of 55V and Vce saturation of 400mV.