HCPL2531W Equivalent & Substitute Parts

Part Overview

The HCPL2531W is a 2-channel optoisolator with transistor output manufactured by onsemi, rated for 2500Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The HCPL2531W provides DC input with transistor output configuration suitable for high-voltage isolation applications in industrial and power management circuits.

Substiute Parts

HCPL2531W

onsemiIn Stock: 761HCPL2531W Datasheet

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HCPL-2533

Broadcom LimitedIn Stock: 3235HCPL-2533 Datasheet

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HCPL-2533-000E

Broadcom LimitedIn Stock: 2595HCPL-2533-000E Datasheet

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HCPL-253L-000E

Broadcom LimitedIn Stock: 777HCPL-253L-000E Datasheet

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HCPL-4534-000E

Broadcom LimitedIn Stock: 5761HCPL-4534-000E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCPL2531W are qualified based on the following electrical and mechanical parameters:

• Number of Channels: Must be 2 channels
• Input Type: Must be DC
• Output Type: Must be Transistor
• Current - Output / Channel: Must be 8mA
• Operating Temperature Range: Must support -55°C ~ 100°C
• Mounting Type: Must be Through Hole
• Package Type: Must be 8-DIP configuration

The substitute parts listed below meet these core requirements. Variations in isolation voltage (higher ratings acceptable), current transfer ratio, switching speed, and maximum output voltage are permitted within the optoisolator category, as these represent performance enhancements or different application requirements rather than functional incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products from Broadcom Limited, providing continuity for designs currently using the obsolete HCPL2531W. Selection among substitutes depends on specific application requirements:

HCPL-2533 and HCPL-2533-000E: These parts offer higher isolation voltage (3750Vrms) compared to the HCPL2531W (2500Vrms). The HCPL-2533-000E variant is ROHS3 compliant, making it suitable for applications requiring environmental compliance. Both variants feature slower switching speeds (800ns turn-on, 1µs turn-off) and reduced maximum output voltage (7V). These are appropriate for applications where higher isolation is beneficial and switching speed is not critical.

HCPL-253L-000E: This part matches the current transfer ratio specifications of the HCPL2531W (19% min @ 16mA, 50% max @ 16mA) and offers faster switching performance (200ns turn-on, 600ns turn-off). It provides 3750Vrms isolation and is ROHS3 compliant. The maximum output voltage is limited to 7V. This variant is suitable for designs requiring performance characteristics closer to the original HCPL2531W with modern compliance standards.

HCPL-4534-000E: This part maintains the 20V maximum output voltage of the HCPL2531W while providing 3750Vrms isolation and faster switching speeds (200ns turn-on, 600ns turn-off). It is ROHS3 compliant and supports the full current transfer ratio range (15% min @ 16mA, 50% max @ 16mA). This variant is optimal for applications requiring high output voltage capability with enhanced isolation and switching performance.

Frequently Asked Questions (FAQ)

Q: Can HCPL-2533 directly replace HCPL2531W in existing designs?

A: HCPL-2533 is functionally compatible as a 2-channel DC-input transistor-output optoisolator with 8mA per-channel output current and matching operating temperature range. However, the reduced maximum output voltage (7V vs. 20V) and slower switching speeds must be evaluated against circuit requirements. PCB layout may require adjustment due to different package dimensions (0.300" vs. 0.400" DIP width).

Q: What is the difference between HCPL-2533 and HCPL-2533-000E?

A: Both parts are electrically identical with 3750Vrms isolation, 2 channels, and transistor output. The primary difference is RoHS compliance: HCPL-2533 is RoHS non-compliant, while HCPL-2533-000E is ROHS3 compliant. For new designs or applications requiring environmental compliance, HCPL-2533-000E is the appropriate selection.

Q: Why do substitute parts have higher isolation voltage than HCPL2531W?

A: The substitute parts (3750Vrms) provide enhanced isolation performance compared to the original HCPL2531W (2500Vrms). Higher isolation voltage is a performance enhancement that does not create incompatibility; circuits designed for 2500Vrms isolation operate correctly with components rated for 3750Vrms isolation.

Q: Are there package compatibility concerns when substituting?

A: Yes. The HCPL2531W uses 8-DIP (0.400", 10.16mm) packaging, while all substitute parts use 8-DIP (0.300", 7.62mm) packaging. Both are through-hole 8-DIP configurations and are mechanically compatible with standard DIP sockets. However, PCB layouts designed for the wider 0.400" package may require adjustment for the narrower 0.300" substitute parts.

Q: Which substitute part best matches the original HCPL2531W specifications?

A: HCPL-253L-000E most closely matches the HCPL2531W in current transfer ratio specifications (19% min @ 16mA, 50% max @ 16mA) and switching performance (200ns turn-on, 600ns turn-off). It provides higher isolation voltage (3750Vrms) and ROHS3 compliance. The primary trade-off is reduced maximum output voltage (7V vs. 20V).

Q: Should I select HCPL-4534-000E if my circuit requires 20V output?

A: HCPL-4534-000E is the only substitute part maintaining the 20V maximum output voltage of the HCPL2531W. If your circuit design depends on this output voltage capability, HCPL-4534-000E is the appropriate selection. It also provides faster switching speeds and ROHS3 compliance.

Q: Are all substitute parts currently in production?

A: Yes. All substitute parts (HCPL-2533, HCPL-2533-000E, HCPL-253L-000E, and HCPL-4534-000E) are classified as active products. The original HCPL2531W is obsolete, making these active alternatives necessary for ongoing production and new designs.