FODM217B Equivalent & Substitute Parts

Part Overview

The FODM217B is an optoisolator with transistor output manufactured by onsemi, designed for galvanic isolation applications requiring 3750Vrms isolation voltage. This single-channel device operates with DC input and provides transistor output suitable for logic-level switching and signal isolation in industrial and consumer electronics. The part is currently in active production status with substantial inventory availability (968,688 pcs). Alternative equivalent parts may be required due to supply constraints, regional availability, or specific application requirements within the defined electrical and mechanical parameter space.

Substiute Parts

FODM217B

onsemiIn Stock: 968758FODM217B Datasheet

Current PartRFQ

FODM217BV

onsemiIn Stock: 801FODM217BV Datasheet

Parametric EquivalentRFQ

EL3H7(B)-G

Everlight Electronics Co LtdIn Stock: 1683EL3H7(B)-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Equivalent substitutes for the FODM217B optoisolator are determined by strict adherence to the following critical parameters:

Isolation Voltage: 3750Vrms minimum requirement Number of Channels: Single channel (1) Output Configuration: Transistor output type Current Transfer Ratio Range: 130% to 260% @ 5mA Maximum Output Voltage: 80V Maximum Output Current: 50mA per channel Operating Temperature Range: -55°C to 110°C Mounting Technology: Surface mount Package Footprint: 4-pin SOIC form factor (0.173" width, 4.40mm) Input Type: DC Compliance: ROHS3 compliant

Substitute parts must match all critical parameters. Minor variations in non-critical specifications (such as turn-on/turn-off time or rise/fall time) do not disqualify a part from equivalency if all primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

FODM217BV (onsemi): This part is a direct parametric equivalent to the FODM217B, sharing identical electrical specifications and the same base product number (FODM217). Both parts are manufactured by onsemi, maintain active production status, and carry ROHS3 compliance. The FODM217BV is suitable as a primary substitute when FODM217B availability is constrained. Inventory availability is lower (713 pcs) compared to the main part.

EL3H7(B)-G (Everlight Electronics Co Ltd): This part meets all critical electrical parameters including isolation voltage, channel count, output type, current transfer ratio range, output voltage and current ratings, and operating temperature range. The part is manufactured by Everlight Electronics, maintains active production status, and carries ROHS3 compliance. A notable difference exists in Vce saturation specification (200mV maximum versus 400mV), which represents improved saturation performance. The supplier device package designation differs (4-SSOP versus 4-SOP), though both maintain the same 4-SOIC footprint dimensions. Inventory availability is moderate (1,585 pcs).

Frequently Asked Questions (FAQ)

Q: Can FODM217BV be used as a direct replacement for FODM217B? A: Yes. FODM217BV shares identical electrical specifications with FODM217B, including isolation voltage, current transfer ratio, output ratings, and operating temperature range. Both parts are onsemi products with the same base product number and ROHS3 compliance.

Q: Is EL3H7(B)-G compatible with FODM217B in all applications? A: EL3H7(B)-G meets all critical electrical parameters required for substitution. The lower Vce saturation specification (200mV versus 400mV) represents improved performance characteristics. Footprint compatibility is maintained at 4-SOIC dimensions. Application-specific validation is required for designs with tight saturation voltage tolerances.

Q: What is the difference between 4-SOP and 4-SSOP package designations? A: Both designations refer to 4-pin small-outline packages with identical footprint dimensions (0.173" width, 4.40mm). The supplier device package designation reflects manufacturer nomenclature; physical compatibility is maintained across all three parts.

Q: Are all substitute parts ROHS3 compliant? A: Yes. FODM217B, FODM217BV, and EL3H7(B)-G all carry ROHS3 compliance certification.

Q: Which substitute part has the best availability? A: FODM217B maintains the highest inventory level at 968,688 pcs. EL3H7(B)-G provides 1,585 pcs, and FODM217BV provides 713 pcs.

Q: Can these parts be used interchangeably in PCB designs? A: Yes, all three parts maintain identical 4-SOIC footprint dimensions and pin configurations, enabling direct PCB layout compatibility.