TLP521-4BLG Equivalent & Substitute Parts

Part Overview

The TLP521-4BLG is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-DIP through-hole component 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 1042 units in stock. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

TLP521-4BLG

Isocom Components 2004 LTDIn Stock: 1100TLP521-4BLG Datasheet

Current PartRFQ

ISP521-4XBLG

Isocom Components 2004 LTDIn Stock: 762ISP521-4XBLG Datasheet

Parametric EquivalentRFQ

TLP521-4XBLG

Isocom Components 2004 LTDIn Stock: 829TLP521-4XBLG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP521-4BLG are identified based on the following critical parameters that determine functional interchangeability:

Electrical Equivalence Criteria:

• Number of Channels: 4
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio range: 200% to 600% @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature range: -30°C ~ 100°C
• Input Type: DC

Mechanical Compatibility Criteria:

• Package / Case: 16-DIP (0.400", 10.16mm)
• Mounting Type: Through Hole

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

All identified substitute parts match these parameters exactly, ensuring direct pin-for-pin and functional compatibility without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TLP521-4BLG, ISP521-4XBLG, and TLP521-4XBLG—are active production components manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts may be based on:

Availability: TLP521-4BLG has the highest inventory level at 1042 units, followed by TLP521-4XBLG at 811 units and ISP521-4XBLG at 719 units.

Compliance: All parts meet ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity requirements, making them suitable for equivalent use in regulated applications.

Timing Specifications: TLP521-4BLG and TLP521-4XBLG both specify Turn On / Turn Off Time at 3µs, 3µs. ISP521-4XBLG does not specify this parameter but maintains identical Rise / Fall Time characteristics of 4µs, 3µs across all three parts.

Frequently Asked Questions (FAQ)

Q: Can ISP521-4XBLG be used as a direct replacement for TLP521-4BLG?

A: Yes. ISP521-4XBLG meets all electrical and mechanical parameters required for direct substitution. The only difference is that Turn On / Turn Off Time is not specified for ISP521-4XBLG, while TLP521-4BLG specifies 3µs, 3µs. Rise / Fall Time remains identical at 4µs, 3µs for both parts.

Q: Are all substitute parts pin-compatible with TLP521-4BLG?

A: Yes. All substitute parts use the identical 16-DIP (0.400", 10.16mm) package with through-hole mounting, ensuring direct pin-for-pin compatibility without PCB modification.

Q: Do the substitute parts maintain the same isolation voltage rating?

A: Yes. All parts provide 5300Vrms isolation voltage, identical current transfer ratio specifications (200% to 600% @ 1mA), and matching output characteristics (55V maximum, 50mA per channel, 400mV Vce saturation).

Q: What is the operating temperature range for these parts?

A: All three parts operate across the identical temperature range of -30°C to 100°C, ensuring consistent performance across thermal conditions.

Q: Are there any compliance differences between the substitute parts?

A: No. All parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, making them equivalent for regulated applications.