FOD250L Equivalent & Substitute Parts

Part Overview

The FOD250L is an optoisolator transistor with base output manufactured by onsemi, rated for 5000Vrms isolation voltage in a single-channel 8-DIP package. This component provides galvanic isolation for DC input signals with transistor output including base connection. The FOD250L is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across isolation voltage, channel configuration, package type, and output characteristics.

Key Parameters

Parameter	FOD250L Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor with Base
Package / Case	8-DIP (0.300", 7.62mm)
Current Transfer Ratio (Min)	15% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Voltage - Output (Max)	7V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.45V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Input Type	DC
Turn On / Turn Off Time (Typ)	1µs, 1µs (Max)

Substitute Part Grouping Explanation

Substitute parts for the FOD250L are grouped based on strict compatibility criteria:

Primary Substitutes (5000Vrms Isolation): Parts maintaining the same 5000Vrms isolation voltage rating with 8-DIP package configuration and transistor-with-base output type. These include HCNW4562, HCNW4562-000E, HCPL-4562-020E, and 6N136-060E variants.

Secondary Substitutes (3750Vrms Isolation): Parts with reduced isolation voltage (3750Vrms) but compatible package, channel count, and output type. These include HCPL-2502-000E, HCPL-2503, HCPL-2503-000E, HCPL-4562, HCPL-4562-000E, and HCPL-4562-060E.

Critical Compatibility Parameters:

Isolation voltage rating (5000Vrms or 3750Vrms)
Single channel configuration
Transistor with base output topology
8-DIP through-hole package
DC input type
8mA output current per channel

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Package	CTR Min @ 16mA	CTR Max @ 16mA	Vout (Max)	Vf (Typ)	If (Max)	Temp Range	Product Status
FOD250L	onsemi	5000Vrms	8-DIP (0.300")	15%	50%	7V	1.45V	25mA	-40°C ~ 85°C	Obsolete
HCNW4562-000E	Broadcom Limited	5000Vrms	8-DIP (0.400")	—	—	20V	1.6V	25mA	-40°C ~ 85°C	Active
HCNW4562	Broadcom Limited	5000Vrms	8-DIP (0.400")	—	—	20V	1.6V	25mA	-40°C ~ 85°C	Active
HCPL-4562-020E	Broadcom Limited	5000Vrms	8-DIP (0.300")	—	—	20V	1.3V	12mA	-40°C ~ 85°C	Active
6N136-060E	Broadcom Limited	3750Vrms	8-DIP (0.300")	19%	50%	20V	1.5V	25mA	-55°C ~ 100°C	Active
HCPL-2502-000E	Broadcom Limited	3750Vrms	8-DIP (0.300")	15%	22%	20V	1.5V	25mA	-55°C ~ 100°C	Active
HCPL-2503-000E	Broadcom Limited	3750Vrms	8-DIP (0.300")	15%	—	7V	1.5V	25mA	-55°C ~ 100°C	Active
HCPL-4562-060E	Broadcom Limited	3750Vrms	8-DIP (0.300")	—	—	20V	1.3V	12mA	-40°C ~ 85°C	Active
HCPL-4562-000E	Broadcom Limited	3750Vrms	8-DIP (0.300")	—	—	20V	1.3V	12mA	-40°C ~ 85°C	Active
HCPL-2503	Broadcom Limited	3750Vrms	8-DIP (0.300")	15%	—	7V	1.5V	25mA	-55°C ~ 100°C	Active
HCPL-4562	Broadcom Limited	3750Vrms	8-DIP (0.300")	—	—	20V	1.3V	12mA	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For Direct 5000Vrms Replacement: HCPL-4562-020E and HCNW4562-000E maintain the 5000Vrms isolation rating. HCPL-4562-020E uses the standard 0.300" DIP package matching FOD250L footprint. HCNW4562-000E uses a 0.400" DIP package requiring PCB layout verification. Both are active products with ROHS3 compliance.

For 3750Vrms Applications: 6N136-060E, HCPL-2502-000E, HCPL-2503-000E, and HCPL-4562-060E provide active alternatives with reduced isolation voltage. These parts are suitable where system isolation requirements permit 3750Vrms operation. HCPL-2503-000E and HCPL-2502-000E offer extended temperature range (-55°C ~ 100°C) compared to FOD250L.

Compliance Considerations: HCPL-4562-020E, HCNW4562-000E, HCPL-2502-000E, HCPL-2503-000E, and HCPL-4562-060E carry ROHS3 compliance certification. HCNW4562 and HCPL-2503 are RoHS non-compliant. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can HCNW4562 replace FOD250L directly? A: HCNW4562 maintains 5000Vrms isolation and transistor-with-base output but uses an 8-DIP (0.400", 10.16mm) package versus FOD250L's 8-DIP (0.300", 7.62mm). PCB footprint compatibility must be verified. HCNW4562-000E is the ROHS3-compliant variant.

Q: What is the difference between HCPL-4562-020E and HCPL-4562-060E? A: Both use identical 8-DIP (0.300") packages and share the same electrical characteristics. HCPL-4562-020E is rated for 5000Vrms isolation, while HCPL-4562-060E is rated for 3750Vrms isolation. Selection depends on system isolation voltage requirements.

Q: Are 3750Vrms parts suitable for FOD250L replacement? A: 3750Vrms substitutes are compatible only in applications where system isolation requirements do not exceed 3750Vrms. Circuit design must confirm that reduced isolation voltage meets safety and regulatory standards. 6N136-060E, HCPL-2502-000E, HCPL-2503-000E, and HCPL-4562-060E are active alternatives.

Q: What is the impact of different Current Transfer Ratio specifications? A: FOD250L specifies 15% minimum and 50% maximum CTR at 16mA input. 6N136-060E specifies 19% minimum and 50% maximum. HCPL-2502-000E specifies 15% minimum and 22% maximum. HCPL-2503-000E specifies 15% minimum with maximum unspecified. Circuit design must account for CTR variation across temperature and input current ranges.

Q: Does package size affect circuit board compatibility? A: Yes. FOD250L and most substitutes use 8-DIP (0.300", 7.62mm) packages with identical footprints. HCNW4562 and HCNW4562-000E use 8-DIP (0.400", 10.16mm) packages requiring PCB layout modification. Pin spacing and lead configuration must be verified before substitution.

Q: What temperature range considerations apply to substitution? A: FOD250L operates -40°C ~ 85°C. 6N136-060E, HCPL-2502-000E, HCPL-2503, and HCPL-2503-000E extend to -55°C ~ 100°C. HCPL-4562 variants and HCNW4562 series maintain -40°C ~ 85°C. Application temperature requirements determine suitable alternatives.

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