FOD050L Optoisolator Equivalent & Substitute Parts

Part Overview

The FOD050L is an optoisolator transistor with base output manufactured by onsemi, designed for galvanic isolation applications requiring 2500Vrms isolation voltage. This single-channel device operates in the DC input domain with transistor output configuration and is currently in active production status. The part is housed in an 8-SOIC surface mount package with unlimited moisture sensitivity rating and full RoHS3 compliance.

Equivalent and substitute parts are identified based on matching functional requirements: single-channel transistor output optoisolators with compatible isolation voltage ratings, output current specifications, and surface mount packaging. Substitute parts listed below meet or exceed the electrical and mechanical parameters of the FOD050L within the optoisolator product category.

Key Parameters

Parameter	FOD050L Specification
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	2500Vrms
Output Type	Transistor with Base
Voltage - Output (Max)	7V
Current - Output / Channel	8mA
Current Transfer Ratio (Min)	15% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the FOD050L are qualified based on the following substitution criteria:

Electrical Compatibility:

Single-channel configuration matching the main part
Transistor with base output topology
Isolation voltage rating of 2500Vrms or higher
Maximum output voltage of 7V or greater
Output current capability of 8mA or higher
Current transfer ratio range compatible with 15-50% specification window

Mechanical Compatibility:

Surface mount mounting type
8-SOIC package footprint (0.154", 3.90mm Width)
Supplier device package designation of 8-SO or equivalent

Compliance & Status:

Active product status
RoHS3 compliance
Moisture sensitivity level MSL 1 (Unlimited)

The substitute parts listed below meet all electrical and mechanical compatibility requirements and are suitable for direct replacement in applications designed for the FOD050L.

Parameter Comparison

Parameter	FOD050L (onsemi)	HCPL-050L-000E (Broadcom)	HCPL-050L-500E (Broadcom)
Voltage - Isolation	2500Vrms	3750Vrms	3750Vrms
Number of Channels	1	1	1
Output Type	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	7V	7V	7V
Current - Output / Channel	8mA	8mA	8mA
Current Transfer Ratio (Min)	15% @ 16mA	19% @ 16mA	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA	50% @ 16mA	50% @ 16mA
Turn On / Turn Off Time (Typ)	1µs, 1µs (Max)	200ns, 600ns	200ns, 600ns
Voltage - Forward (Vf) (Typ)	1.45V	1.5V	1.5V
Current - DC Forward (If) (Max)	25mA	25mA	25mA
Operating Temperature	-40°C ~ 85°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both HCPL-050L-000E and HCPL-050L-500E from Broadcom Limited are qualified substitutes for the FOD050L. The primary differences between these options relate to packaging format and isolation voltage rating:

HCPL-050L-000E is supplied in Tube packaging, matching the FOD050L packaging format.

HCPL-050L-500E is supplied in Cut Tape (CT) & Digi-Reel® packaging, offering alternative supply chain options.

Both substitute parts provide higher isolation voltage (3750Vrms versus 2500Vrms), extended operating temperature range (-55°C ~ 100°C versus -40°C ~ 85°C), and faster switching response (200ns/600ns versus 1µs/1µs). All three parts maintain identical output voltage, output current, and current transfer ratio maximum specifications. All parts carry active product status, RoHS3 compliance, and unlimited moisture sensitivity rating.

Selection between FOD050L and its substitutes should be based on supply chain availability, packaging preference, and application-specific temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL-050L-000E or HCPL-050L-500E directly replace FOD050L in existing designs?

A: Yes. Both Broadcom parts are pin-compatible substitutes with matching 8-SOIC package footprints, identical output voltage and current specifications, and compatible current transfer ratio ranges. The higher isolation voltage rating of the Broadcom parts (3750Vrms) exceeds the FOD050L requirement (2500Vrms), making them suitable for direct replacement.

Q: What is the difference between HCPL-050L-000E and HCPL-050L-500E?

A: The electrical specifications are identical. The primary difference is packaging format: HCPL-050L-000E is supplied in Tube packaging, while HCPL-050L-500E is supplied in Cut Tape (CT) & Digi-Reel® packaging. Selection depends on procurement and assembly process requirements.

Q: Are there any performance differences between FOD050L and the Broadcom substitutes?

A: The Broadcom parts feature faster switching response (200ns/600ns turn-on/turn-off versus 1µs/1µs for FOD050L) and support a wider operating temperature range (-55°C ~ 100°C versus -40°C ~ 85°C). All other electrical parameters remain compatible.

Q: Do all three parts meet the same compliance standards?

A: Yes. FOD050L, HCPL-050L-000E, and HCPL-050L-500E are all RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and maintain active product status.

Q: What isolation voltage should I specify for my application?

A: The FOD050L provides 2500Vrms isolation. If your application requires this level or lower, FOD050L is suitable. The Broadcom substitutes provide 3750Vrms isolation, which exceeds this requirement and offers additional safety margin in high-voltage isolation applications.

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