TLP521-1BL Equivalent & Substitute Parts

Part Overview

The TLP521-1BL is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides 5300Vrms isolation voltage and is housed in a 4-DIP package. The component is classified as Active status and is ROHS3 compliant. Substitute parts are identified based on matching electrical characteristics, isolation ratings, output specifications, and package compatibility to ensure direct functional replacement in circuit applications.

Substiute Parts

TLP521-1BL

Isocom Components 2004 LTDIn Stock: 19993TLP521-1BL Datasheet

Current PartRFQ

ISP521-1XBL

Isocom Components 2004 LTDIn Stock: 1080ISP521-1XBL Datasheet

Parametric EquivalentRFQ

TLP521-1XBL

Isocom Components 2004 LTDIn Stock: 2824TLP521-1XBL Datasheet

Parametric EquivalentRFQ

TLP521XBL

Isocom Components 2004 LTDIn Stock: 917TLP521XBL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP521-1BL are qualified based on the following critical parameters:

• Isolation Voltage: 5300Vrms (all substitutes match)
• Number of Channels: 1 (all substitutes match)
• Output Type: Transistor (all substitutes match)
• Maximum Output Voltage: 55V (all substitutes match)
• Maximum Output Current: 50mA per channel (all substitutes match)
• Current Transfer Ratio Range: 200% to 600% @ 1mA (all substitutes match)
• Package Type: 4-DIP (0.300", 7.62mm) (all substitutes match)
• Operating Temperature Range: -30°C ~ 100°C (all substitutes match)
• Input Type: DC (all substitutes match)
• RoHS Compliance: ROHS3 Compliant (all substitutes match)

The three identified substitutes—ISP521-1XBL, TLP521-1XBL, and TLP521XBL—maintain electrical and mechanical compatibility with the TLP521-1BL across all critical parameters. Differences exist only in packaging format (Tube vs. standard) and minor timing specifications where data is available.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—ISP521-1XBL, TLP521-1XBL, and TLP521XBL—are qualified as direct functional equivalents to the TLP521-1BL based on electrical parameter matching and compliance certifications. Selection among these substitutes should be based on:

Product Status: All parts maintain Active status, ensuring ongoing manufacturer support and availability.

Regulatory Compliance: All substitutes are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the primary part.

Packaging Format: The primary difference among substitutes is packaging. TLP521-1BL is supplied in standard packaging, while ISP521-1XBL, TLP521-1XBL, and TLP521XBL are supplied in Tube packaging. This distinction affects handling and storage but does not impact electrical performance.

Timing Specifications: ISP521-1XBL does not specify Turn On/Turn Off Time values. If timing-critical applications require documented turn-on and turn-off specifications of 3µs each, TLP521-1XBL or TLP521XBL are preferred.

Inventory Availability: TLP521-1BL (19,962 pcs), TLP521-1XBL (2,746 pcs), TLP521XBL (892 pcs), and ISP521-1XBL (1,004 pcs) are all in stock.

Frequently Asked Questions (FAQ)

Q: Can ISP521-1XBL replace TLP521-1BL in all applications?

A: ISP521-1XBL is electrically equivalent to TLP521-1BL across all critical parameters including isolation voltage, output current, and current transfer ratio. The primary consideration is that ISP521-1XBL does not specify Turn On/Turn Off Time values. For applications where these timing parameters are critical, TLP521-1XBL or TLP521XBL are recommended.

Q: What is the difference between TLP521-1XBL and TLP521XBL?

A: Both parts are electrically identical and share the same 4-DIP package. The difference lies in the series designation: TLP521-1XBL belongs to the TLP521-1 series, while TLP521XBL belongs to the TLP521 series. Both are functionally equivalent substitutes for TLP521-1BL.

Q: Does packaging format affect circuit performance?

A: No. The difference between standard packaging and Tube packaging is a handling and storage consideration only. Electrical performance and pin configuration remain identical. Tube packaging is typically used for automated assembly processes.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All four parts—TLP521-1BL, ISP521-1XBL, TLP521-1XBL, and TLP521XBL—are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. All substitute parts use the same 4-DIP (0.300", 7.62mm) package with identical pin configuration and through-hole mounting. No PCB layout modifications are required for substitution.

Q: What is the maximum operating temperature range?

A: All parts operate across the temperature range of -30°C to 100°C, providing consistent thermal performance across all substitutes.