HMHA281R2V Equivalent & Substitute Parts

Part Overview

The HMHA281R2V is an optoisolator with transistor output manufactured by onsemi, designed for high-voltage isolation applications. This component provides 3750Vrms isolation in a 4-SOIC surface mount package. The part is currently active in production with 19,100 units in stock. Substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the optoisolator category.

Substiute Parts

HMHA281R2V

onsemiIn Stock: 19194HMHA281R2V Datasheet

Current PartRFQ

HMHA281R2

onsemiIn Stock: 18196HMHA281R2 Datasheet

Parametric EquivalentRFQ

HMHA281R4

onsemiIn Stock: 880HMHA281R4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HMHA281R2V are identified based on matching the following critical parameters:

• Voltage - Isolation: 3750Vrms
• Number of Channels: 1
• Output Type: Transistor
• Current Transfer Ratio range: 50% to 600% @ 5mA
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Rise / Fall Time: 3µs, 3µs
• Operating Temperature: -55°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 4-SOIC (0.173", 4.40mm Width)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts maintain identical electrical performance specifications and physical package dimensions, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—HMHA281R2V, HMHA281R2, and HMHA281R4—are active products from onsemi with identical electrical and mechanical specifications. Selection between these parts should be based on availability and supply chain requirements. All parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, indicating equivalent handling and storage requirements. The HMHA281R2V and HMHA281R2 maintain higher inventory levels (19,100 and 18,100 units respectively), while HMHA281R4 has limited availability at 829 units.

Frequently Asked Questions (FAQ)

Q: Can HMHA281R2 be used as a direct replacement for HMHA281R2V?

A: Yes. Both parts share identical electrical parameters including isolation voltage (3750Vrms), current transfer ratio (50–600% @ 5mA), output voltage (80V max), output current (50mA), and switching characteristics (3µs rise/fall time). Both are packaged in 4-SOIC form factor and operate across the same temperature range (-55°C to 100°C).

Q: What is the difference between HMHA281R4 and HMHA281R2V?

A: The electrical and mechanical specifications are identical. Both provide 3750Vrms isolation, 1-channel transistor output, and 4-SOIC packaging. The primary difference is inventory availability, with HMHA281R4 having significantly lower stock levels.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts use the 4-SOIC (0.173", 4.40mm Width) package with identical pin configurations and footprints, allowing direct substitution without PCB redesign.

Q: Do these parts have different compliance certifications?

A: No. All three parts are ROHS3 compliant with MSL Level 1 (Unlimited) rating. They share identical regulatory and environmental compliance status.

Q: Which part should be selected for new designs?

A: Selection should be based on supply chain availability and lead time requirements. All three parts are active products with equivalent performance and compliance profiles.