H11F1SD Equivalent & Substitute Parts

Part Overview

The H11F1SD is an optoisolator with MOSFET output manufactured by onsemi, designed for high-voltage isolation applications. It provides 5300Vrms isolation voltage in a 6-SMD surface mount package. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and new design implementations where this isolation topology is required.

Substiute Parts

H11F1SD

onsemiIn Stock: 3427H11F1SD Datasheet

Current PartRFQ

H11F1SR2M

Fairchild SemiconductorIn Stock: 1985H11F1SR2M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11F1SD is determined by the following critical parameters:

• Isolation Voltage: Minimum 4170Vrms (substitute must meet or exceed 80% of the main part's 5300Vrms rating)
• Output Type: MOSFET configuration required
• Number of Channels: Single channel
• Package / Case: 6-SMD, Gull Wing surface mount
• Input Type: DC
• Maximum Output Voltage: 30V
• Forward Voltage (Vf): 1.3V typical
• Maximum Forward Current (If): 60 mA

The H11F1SR2M meets these substitution criteria across all critical electrical and mechanical parameters, maintaining functional compatibility while accommodating the obsolescence of the original part.

Parameter Comparison

Engineering Selection Recommendations

The H11F1SR2M is the designated substitute for the obsolete H11F1SD. Both components share identical electrical characteristics for output voltage, forward voltage, and forward current specifications. The H11F1SR2M maintains active product status, ensuring availability for procurement and ongoing supply chain support.

The H11F1SR2M operates within a reduced isolation voltage specification (4170Vrms versus 5300Vrms) and a narrower temperature range (-40°C to 100°C versus -55°C to 100°C). Switching speed is slower (45µs versus 25µs). These differences must be evaluated against application requirements before implementation.

Both components carry identical export control classifications (EAR99) and tariff codes (8541.49.8000), supporting equivalent regulatory compliance pathways.

Frequently Asked Questions (FAQ)

Q: Can the H11F1SR2M directly replace the H11F1SD in existing designs?

A: Direct replacement is possible if the application isolation voltage requirement does not exceed 4170Vrms and the operating temperature range does not fall below -40°C. The identical package, output voltage, and current specifications support pin-compatible substitution.

Q: What is the primary difference between these two parts?

A: The H11F1SR2M has lower isolation voltage (4170Vrms versus 5300Vrms) and slower switching speed (45µs versus 25µs). The H11F1SD supports lower operating temperatures (-55°C minimum versus -40°C minimum).

Q: Are there any package compatibility concerns?

A: Both parts use identical 6-SMD, Gull Wing surface mount packaging. PCB layouts and reflow profiles remain compatible.

Q: What compliance certifications apply to both parts?

A: Both components are classified under ECCN EAR99 and HTSUS code 8541.49.8000, maintaining equivalent export control and tariff treatment.

Q: Why is the H11F1SD obsolete?

A: Product obsolescence is determined by the manufacturer. The H11F1SR2M represents the active equivalent in the optoisolator MOSFET output product line.