TLP621-2BL Equivalent & Substitute Parts

Part Overview

The TLP621-2BL is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This dual-channel device provides 5300Vrms isolation in an 8-DIP package and is designed for applications requiring galvanic isolation between input and output circuits. The part is currently active in production with 781 units in stock. Alternative models may be required due to inventory constraints, application-specific timing requirements, or supply chain considerations.

Substiute Parts

TLP621-2BL

Isocom Components 2004 LTDIn Stock: 813TLP621-2BL 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 TLP621-2BL based on the following critical parameters:

• Number of Channels: Both devices feature 2 channels
• Voltage - Isolation: Both rated at 5300Vrms
• Current Transfer Ratio: Identical specifications (50% min, 600% max @ 5mA)
• Output Type: Both are transistor output devices
• Voltage - Output (Max): Both rated at 55V
• Current - Output / Channel: Both rated at 50mA
• Package / Case: Both use 8-DIP (0.300", 7.62mm)
• Operating Temperature: Identical range (-30°C ~ 100°C)
• Mounting Type: Both are Through Hole
• RoHS Status: Both ROHS3 Compliant

The ISP521-2X is manufactured by the same supplier and maintains electrical and mechanical compatibility with the TLP621-2BL.

Parameter Comparison

Engineering Selection Recommendations

Both the TLP621-2BL and ISP521-2X are active products from Isocom Components 2004 LTD with identical isolation voltage, channel count, output ratings, and package specifications. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The primary difference between the two devices is the rise time specification: the TLP621-2BL specifies 2µs rise time, while the ISP521-2X specifies 4µs rise time. Applications with strict timing requirements below 4µs rise time should use the TLP621-2BL. For applications where rise time tolerance permits 4µs or greater, the ISP521-2X is electrically equivalent.

Both devices are suitable for direct substitution in 8-DIP through-hole applications requiring dual-channel optoisolation at 5300Vrms with 50mA output current per channel.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2X replace TLP621-2BL in all applications?

A: The ISP521-2X is electrically equivalent to the TLP621-2BL for all specified parameters except rise time. The ISP521-2X has a maximum rise time of 4µs compared to 2µs for the TLP621-2BL. Substitution is valid for applications where the 4µs rise time specification is acceptable.

Q: Are the packages identical?

A: Yes. Both devices use the 8-DIP (0.300", 7.62mm) package with identical pin configurations and through-hole mounting requirements. No PCB layout modifications are required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the TLP621-2BL and ISP521-2X are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the isolation voltage rating for both devices?

A: Both devices provide 5300Vrms isolation between input and output circuits.

Q: Are the current transfer ratios identical?

A: Yes. Both devices specify a minimum current transfer ratio of 50% and maximum of 600% at 5mA input current.

Q: What is the maximum output current per channel?

A: Both devices are rated for 50mA maximum output current per channel.

Q: What operating temperature range do both devices support?

A: Both devices operate across the temperature range of -30°C to 100°C.