HCNW4504 Equivalent & Substitute Parts

Part Overview

The HCNW4504 is an optoisolator with transistor output manufactured by Broadcom Limited. This 8-DIP through-hole component provides 5000Vrms isolation with a single channel and DC input type. The part is currently active in production with 2023 units in stock. Alternative models may be required due to component availability, regional sourcing constraints, or specific application requirements related to isolation voltage, output characteristics, or thermal operating range.

Substiute Parts

HCNW4504

Broadcom LimitedIn Stock: 2088HCNW4504 Datasheet

Current PartRFQ

HCPL4503M

onsemiIn Stock: 6122HCPL4503M Datasheet

MFR RecommendedRFQ

SFH6345

Vishay Semiconductor Opto DivisionIn Stock: 2245SFH6345 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCNW4504 is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms required
• Number of Channels: Must be 1 channel
• Input Type: Must be DC
• Output Type: Transistor or Transistor with Base acceptable
• Mounting Type: Through Hole required
• Package Type: 8-DIP form factor
• Current Transfer Ratio (Min): Minimum 19% @ 16mA
• Current - Output / Channel: 8mA capability
• Current - DC Forward (If) (Max): 25mA maximum

The substitute parts listed below meet or exceed these core electrical and mechanical parameters, ensuring functional compatibility in applications designed for the HCNW4504.

Parameter Comparison

Engineering Selection Recommendations

HCPL4503M (onsemi): This substitute meets all core electrical parameters with matching isolation voltage (5000Vrms) and output characteristics. The HCPL4503M features transistor output with base connection, providing additional design flexibility. The part is ROHS3 compliant and carries active product status. Operating temperature range is -40°C ~ 100°C, which is narrower than the HCNW4504 at the lower end. Package dimensions are 8-DIP (0.300", 7.62mm), which is more compact than the original part.

SFH6345 (Vishay Semiconductor Opto Division): This substitute exceeds the isolation voltage requirement at 5300Vrms and maintains all critical electrical parameters. The SFH6345 offers higher maximum output voltage (25V versus 20V) and lower forward voltage (1.33V typical). The part is ROHS3 compliant and maintains the full operating temperature range of -55°C ~ 100°C. Package dimensions are 8-DIP (0.300", 7.62mm).

Both substitutes are active products with current inventory availability and meet the mandatory electrical and mechanical criteria for functional replacement.

Frequently Asked Questions (FAQ)

Q: Can HCPL4503M be used as a direct replacement for HCNW4504?

A: HCPL4503M meets all core electrical substitution criteria including isolation voltage, channel count, input/output types, and current ratings. The primary design consideration is the narrower operating temperature range (-40°C ~ 100°C versus -55°C ~ 100°C). Package dimensions differ (0.300" versus 0.400" DIP width), which may require PCB layout verification. The addition of base connection on the transistor output provides design flexibility not present in the original part.

Q: What are the key differences between SFH6345 and HCNW4504?

A: SFH6345 provides higher isolation voltage (5300Vrms versus 5000Vrms) and higher maximum output voltage (25V versus 20V). Turn-on/turn-off times are slightly slower (300ns versus 200ns/300ns). Forward voltage is lower (1.33V typical versus 1.59V). Both parts maintain the same operating temperature range and current ratings. Package dimensions are more compact (0.300" versus 0.400" DIP width).

Q: Are there PCB layout considerations when substituting these parts?

A: Both HCPL4503M and SFH6345 use 8-DIP (0.300", 7.62mm) packaging, which is narrower than the HCNW4504 (0.400", 10.16mm). PCB footprints must be verified for compatibility. Pin spacing remains standard 8-DIP configuration. Through-hole mounting type is consistent across all three parts.

Q: Which substitute is recommended for applications requiring the full -55°C ~ 100°C temperature range?

A: SFH6345 maintains the complete operating temperature range of the original HCNW4504 (-55°C ~ 100°C). HCPL4503M has a minimum operating temperature of -40°C, which may be limiting for applications requiring extended low-temperature operation.

Q: Do the substitute parts have different RoHS compliance status?

A: Yes. HCNW4504 is RoHS non-compliant. Both HCPL4503M and SFH6345 are ROHS3 compliant. Applications subject to RoHS requirements should use either substitute part.