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HCPL-2531 Equivalent & Substitute Parts
Part Overview
The HCPL-2531 is a 2-channel optoisolator with transistor output, providing 3750Vrms isolation voltage. This component is designed for applications requiring galvanic isolation between input and output circuits with DC input control. The part is currently active in production and widely available with 25,100 units in stock. Alternative models are necessary when specific channel requirements, compliance certifications, or timing specifications differ from the primary part.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HCPL-2531 |
| Manufacturer | Broadcom Limited |
| Category | Optoisolators |
| Number of Channels | 2 |
| Voltage - Isolation | 3750Vrms |
| Current Transfer Ratio (Min) | 19% @ 16mA |
| Current Transfer Ratio (Max) | 50% @ 16mA |
| Turn On / Turn Off Time (Typ) | 200ns, 600ns |
| Input Type | DC |
| Output Type | Transistor |
| Voltage - Output (Max) | 20V |
| Current - Output / Channel | 8mA |
| Voltage - Forward (Vf) (Typ) | 1.5V |
| Current - DC Forward (If) (Max) | 25mA |
| Operating Temperature | -55°C ~ 100°C |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the HCPL-2531 are determined by the following critical parameters:
Isolation Voltage: All substitutes maintain 3750Vrms isolation voltage, ensuring equivalent electrical isolation performance.
Current Transfer Ratio: All substitutes operate within the 19% to 50% range @ 16mA, maintaining consistent input-to-output current transfer characteristics.
Output Characteristics: All substitutes provide 20V maximum output voltage and 8mA per-channel output current, ensuring compatible load-driving capability.
Package and Mounting: All substitutes use 8-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical compatibility.
Input Type and Output Type: All substitutes feature DC input and transistor output configuration.
Operating Temperature Range: All substitutes operate across -55°C to 100°C, matching thermal specifications.
Channel Configuration Variance: The HCPL-2531 provides 2 channels, while HCPL-4502 and HCPL-4503 provide 1 channel each. Single-channel variants are substitutes only when application requirements permit reduced channel count.
Timing Specification Variance: HCPL-4503 specifies turn-on/turn-off time as 1µs maximum, differing from the 200ns/600ns typical specification of other variants. This timing difference affects switching speed performance.
Compliance Variance: HCPL-2531-000E, HCPL-4502-000E, and HCPL-4503-000E are ROHS3 compliant, while HCPL-2531 and HCPL-4502 are RoHS non-compliant.
Parameter Comparison
| Parameter | HCPL-2531 | HCPL-2531-000E | HCPL-4502 | HCPL-4502-000E | HCPL-4503-000E |
|---|---|---|---|---|---|
| Manufacturer | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited |
| Number of Channels | 2 | 2 | 1 | 1 | 1 |
| Voltage - Isolation | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms |
| Current Transfer Ratio (Min) | 19% @ 16mA | 19% @ 16mA | 19% @ 16mA | 19% @ 16mA | 19% @ 16mA |
| Current Transfer Ratio (Max) | 50% @ 16mA | 50% @ 16mA | 50% @ 16mA | 50% @ 16mA | 50% @ 16mA |
| Turn On / Turn Off Time (Typ) | 200ns, 600ns | 200ns, 600ns | 200ns, 600ns | 200ns, 600ns | 1µs, 1µs (Max) |
| Input Type | DC | DC | DC | DC | DC |
| Output Type | Transistor | Transistor | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 20V | 20V | 20V | 20V | 20V |
| Current - Output / Channel | 8mA | 8mA | 8mA | 8mA | 8mA |
| Voltage - Forward (Vf) (Typ) | 1.5V | 1.5V | 1.5V | 1.5V | 1.5V |
| Current - DC Forward (If) (Max) | 25mA | 25mA | 25mA | 25mA | 25mA |
| Operating Temperature | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Inventory (Pcs) | 25,100 | 4,620 | 5,800 | 1,468 | 15,885 |
Engineering Selection Recommendations
HCPL-2531-000E is the direct equivalent of HCPL-2531 with identical electrical and mechanical specifications. Selection of HCPL-2531-000E is appropriate when ROHS3 compliance is required. Both parts maintain 2-channel configuration and identical timing characteristics.
HCPL-4502 and HCPL-4502-000E are single-channel variants suitable for applications requiring only one isolation channel. HCPL-4502-000E provides ROHS3 compliance. Timing specifications remain identical to the 2-channel variants.
HCPL-4503-000E is a single-channel variant with extended turn-on/turn-off time specifications (1µs maximum) compared to the 200ns/600ns typical timing of other variants. This part is ROHS3 compliant and appropriate for applications where slower switching speeds are acceptable or required.
Selection between 2-channel and 1-channel variants depends on circuit requirements. Selection between compliant and non-compliant variants depends on regulatory and procurement requirements. Selection of HCPL-4503-000E depends on timing tolerance specifications.
Frequently Asked Questions (FAQ)
Q: Can HCPL-4502 or HCPL-4503 replace HCPL-2531 in a 2-channel application?
A: No. HCPL-4502 and HCPL-4503 are single-channel devices. They cannot directly replace the 2-channel HCPL-2531 without circuit redesign to accommodate reduced channel count.
Q: What is the difference between HCPL-2531 and HCPL-2531-000E?
A: Both parts are electrically and mechanically identical. The primary difference is RoHS compliance status: HCPL-2531 is RoHS non-compliant, while HCPL-2531-000E is ROHS3 compliant. Packaging differs (standard vs. tube).
Q: Can HCPL-4503-000E be used where HCPL-4502-000E is specified?
A: Substitution is possible only if the application tolerates the extended turn-on/turn-off time of 1µs maximum. HCPL-4502-000E specifies 200ns/600ns typical timing. Applications with strict timing requirements must not substitute HCPL-4503-000E for HCPL-4502-000E.
Q: Are all substitute parts pin-compatible?
A: All parts use 8-DIP (0.300", 7.62mm) through-hole packaging. However, channel count differences affect functional pin usage. Single-channel variants (HCPL-4502, HCPL-4503) have different internal pin configurations than the 2-channel HCPL-2531.
Q: Which substitute part has the highest inventory availability?
A: HCPL-2531 has the highest inventory at 25,100 units. Among substitutes, HCPL-4503-000E has 15,885 units available.
Q: Do all parts operate across the same temperature range?
A: Yes. All parts operate from -55°C to 100°C, providing identical thermal performance specifications.
Q: What compliance certifications apply to these parts?
A: HCPL-2531-000E, HCPL-4502-000E, and HCPL-4503-000E are ROHS3 compliant. HCPL-2531 and HCPL-4502 are RoHS non-compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.
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