SFH6732 Equivalent & Substitute Parts

Part Overview

The SFH6732 is a 2-channel logic output optoisolator manufactured by Vishay Semiconductor Opto Division, designed for high-voltage isolation applications requiring 5300Vrms isolation rating and push-pull totem pole output configuration. The device operates at 5MBd data rate with 5kV/µs and 10kV/µs common mode transient immunity specifications across an 8-DIP through-hole package.

The SFH6732 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Substiute Parts

SFH6732

Vishay Semiconductor Opto DivisionIn Stock: 2304SFH6732 Datasheet

Current PartRFQ

HCPL-2232

Broadcom LimitedIn Stock: 1283HCPL-2232 Datasheet

MFR RecommendedRFQ

HCPL-2430-020E

Broadcom LimitedIn Stock: 5772HCPL-2430-020E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH6732 optoisolator is determined by the following critical parameters:

• Channel Configuration: 2-channel input/output structure
• Isolation Voltage: Minimum 5300Vrms or equivalent
• Output Configuration: Push-pull totem pole topology
• Output Current: 25 mA per channel capability
• Package Type: 8-DIP through-hole form factor
• Operating Temperature Range: -40°C to 85°C
• Input Type: DC input
• Supply Voltage Compatibility: Overlap with 4.5V ~ 15V range

The substitute parts identified (HCPL-2232 and HCPL-2430-020E) maintain the same channel count, output topology, package configuration, and operating temperature range. Variations in isolation voltage, data rate, and common mode transient immunity are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

HCPL-2430-020E is the primary substitute for the SFH6732 in applications where isolation voltage and supply voltage specifications can be accommodated. This part maintains ROHS3 compliance matching the original device, operates within the same temperature range, and provides superior propagation delay performance (55ns vs. 300ns). The narrower supply voltage range (4.75V ~ 5.25V) requires verification against system power distribution specifications. The reduced common mode transient immunity (1kV/µs vs. 5kV/µs, 10kV/µs) must be evaluated for high-speed switching environments.

HCPL-2232 serves as an alternative substitute where lower isolation voltage (3750Vrms) is acceptable and enhanced common mode transient immunity (10kV/µs) is beneficial. This part maintains the original 5MBd data rate and 300ns propagation delay characteristics. The broader supply voltage range (4.5V ~ 20V) provides greater design flexibility. RoHS non-compliance status requires assessment against procurement and regulatory requirements.

Both substitute parts are active products with confirmed inventory availability, ensuring long-term supply chain continuity compared to the obsolete SFH6732.

Frequently Asked Questions (FAQ)

Q: Can HCPL-2430-020E directly replace SFH6732 in existing designs?

A: Direct replacement requires verification of three parameters: (1) supply voltage must fall within 4.75V ~ 5.25V range, (2) isolation voltage requirement of 5000Vrms must be sufficient for the application, and (3) common mode transient immunity of 1kV/µs must meet circuit switching speed requirements. Pin-to-pin compatibility is confirmed through identical 8-DIP package configuration.

Q: What is the primary difference between HCPL-2232 and HCPL-2430-020E?

A: HCPL-2232 maintains the original 5MBd data rate and 300ns propagation delay with enhanced common mode transient immunity (10kV/µs). HCPL-2430-020E provides 40MBd data rate and 55ns propagation delay but with reduced common mode transient immunity (1kV/µs) and narrower supply voltage range. Selection depends on whether the application prioritizes data rate performance or transient immunity.

Q: Are there compliance differences between the substitute parts?

A: HCPL-2430-020E maintains ROHS3 compliance matching the original SFH6732. HCPL-2232 is RoHS non-compliant. Both parts are REACH unaffected and classified as EAR99 for export control purposes. Compliance requirements must be verified against procurement specifications.

Q: Is the 8-DIP package identical across all three parts?

A: Yes. All three parts use 8-DIP (0.300", 7.62mm) through-hole package configuration, ensuring mechanical and electrical pin compatibility on existing PCB layouts.

Q: What inventory status should influence the selection decision?

A: HCPL-2430-020E has 5700 units in stock, HCPL-2232 has 1239 units, and SFH6732 has 2200 units remaining. For new production, substitute parts with active product status and higher inventory levels provide superior supply chain security.