PS8101-F3-AX Optoisolator - Equivalent & Substitute Parts

Part Overview

The PS8101-F3-AX is a single-channel optoisolator with transistor output manufactured by CEL, rated for 3750Vrms isolation voltage. The device features a 5-SOP package and is classified as discontinued at DiGi Electronics. Due to its discontinuation status, identifying equivalent substitute parts that maintain electrical and mechanical compatibility is essential for ongoing design support and production continuity.

Key Parameters

Parameter	PS8101-F3-AX
Manufacturer	CEL
Voltage - Isolation	3750Vrms
Number of Channels	1
Current Transfer Ratio (Min @ 16mA)	15%
Current Transfer Ratio (Max @ 16mA)	35%
Turn On / Turn Off Time (Typ)	500ns / 600ns
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.7V
Operating Temperature	-55°C to 100°C
Package / Case	6-SOIC (0.173", 4.40mm Width), 5 Leads
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following key parameters:

Mandatory Compatibility Parameters:

Package / Case: 6-SOIC (0.173", 4.40mm Width), 5 Leads
Number of Channels: 1
Output Type: Transistor
Input Type: DC
Voltage - Isolation: ≥ 3750Vrms
Current - Output / Channel: 8mA (matching output capability)
RoHS Status: ROHS3 Compliant

Critical Electrical Parameters for Substitution:

Current Transfer Ratio: Must support the application's input/output current requirements
Turn On / Turn Off Time: Impact on circuit switching performance
Operating Temperature Range: Must encompass application operating conditions
Voltage - Output (Max): Must support circuit load voltage requirements

The PS8101-F3-AX can be substituted with components that maintain these parameters while potentially offering enhanced performance characteristics such as faster switching times, higher isolation voltage, or extended temperature ranges.

Parameter Comparison

Parameter	PS8101-F3-AX (CEL)	ACPL-M43T-000E (Broadcom)	ACPL-M43U-000E (Broadcom)	ACPL-M49T-000E (Broadcom)	ACPL-M50L-000E (Broadcom)	FODM452 (onsemi)	FODM452R2 (onsemi)
Voltage - Isolation	3750Vrms	4000Vrms	3750Vrms	4000Vrms	3750Vrms	3750Vrms	3750Vrms
Number of Channels	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	15% @ 16mA	32% @ 10mA	32% @ 10mA	32% @ 10mA	100% @ 3mA	20% @ 16mA	20% @ 16mA
Current Transfer Ratio (Max)	35% @ 16mA	100% @ 10mA	80% @ 10mA	80% @ 10mA	200% @ 3mA	50% @ 16mA	50% @ 16mA
Turn On / Turn Off Time (Typ)	500ns / 600ns	150ns / 500ns	200ns / 300ns	-	200ns / 380ns	400ns / 350ns	400ns / 350ns
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	35V	20V	20V	20V	24V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Operating Temperature	-55°C to 100°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 105°C	-40°C to 85°C	-40°C to 85°C
Package / Case	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes:

The ACPL-M50L series (ACPL-M50L-000E, ACPL-M50L-500E, ACPL-M50L-560E) by Broadcom represents the optimal technical substitutes for the PS8101-F3-AX. These devices match the isolation voltage requirement of 3750Vrms, share identical package geometry, and maintain single-channel transistor output configuration. The ACPL-M50L variants offer active product status with ROHS3 compliance and superior current transfer ratio performance, providing enhanced circuit reliability. These parts are available in high-volume inventory across multiple packaging options (Tube, Cut Tape, and Digi-Reel configurations).

Secondary Substitutes:

The ACPL-M43U-000E by Broadcom and FODM452 / FODM452R2 by onsemi provide compatible alternatives with matching isolation voltage and package specifications. Both maintain ROHS3 compliance and active product status. The ACPL-M43U-000E extends the operating temperature range to -40°C to 125°C compared to the original specification. The FODM452 and FODM452R2 deliver mechanical compatibility with nearly identical electrical characteristics, though with a more restricted temperature range of -40°C to 85°C.

Alternative High-Isolation Options:

The ACPL-M43T series (ACPL-M43T-000E, ACPL-M43T-500E) and ACPL-M49T series (ACPL-M49T-000E, ACPL-M49T-500E) by Broadcom offer 4000Vrms isolation voltage, exceeding the original specification. These devices support applications requiring enhanced isolation margins while maintaining all other package and functional specifications.

Frequently Asked Questions (FAQ)

Q: What makes the ACPL-M50L series the primary substitute for the PS8101-F3-AX?

A: The ACPL-M50L series matches all mandatory compatibility parameters: identical 6-SOIC package with 5 leads, single-channel transistor output, 3750Vrms isolation voltage, 8mA output current per channel, DC input type, and ROHS3 compliance. The devices maintain active product status and offer superior current transfer ratio performance compared to the discontinued PS8101-F3-AX.

Q: Can I use the ACPL-M43T variants as substitutes despite their higher 4000Vrms isolation voltage?

A: Yes. The higher isolation voltage rating of 4000Vrms supports all applications designed for 3750Vrms or lower isolation requirements. The devices are package-compatible, maintain single-channel transistor output, share identical output current specifications, and hold ROHS3 compliance. Higher isolation voltage provides additional design margin without circuit redesign.

Q: What are the temperature range implications when choosing between ACPL-M50L and FODM452?

A: The ACPL-M50L operates across -40°C to 105°C, while the FODM452 operates across -40°C to 85°C. If your application requires operation above 85°C, the ACPL-M50L is the appropriate choice. For applications limited to 85°C maximum temperature, both devices are compatible.

Q: Are there packaging differences between the substitute options?

A: All substitute parts maintain the same core package type: 6-SOIC (0.173", 4.40mm Width) with 5 leads. However, suppliers offer these parts in different packaging configurations: Tube, Cut Tape (CT) & Digi-Reel, and Bulk. These packaging differences affect order quantity and delivery form but do not impact electrical or mechanical compatibility.

Q: What is the significance of Current Transfer Ratio differences in the substitutes?

A: The Current Transfer Ratio determines the efficiency of the optocoupler's light-to-current conversion. The PS8101-F3-AX specifies 15-35% @ 16mA. Most Broadcom ACPL substitutes achieve 32-100% @ 10mA, indicating higher transfer efficiency at lower input currents. The ACPL-M50L series reaches 100-200% @ 3mA, providing superior performance for low-current input circuits. Verify that your application's input and output current parameters are satisfied by the selected substitute.

Q: Can I substitute parts without circuit redesign considerations?

A: Substitution within the identified compatible groups requires verification of three application-specific parameters: (1) input current drive capability relative to the substitute's specified input current ratings, (2) output load voltage against the substitute's maximum output voltage rating, and (3) operating temperature range encompassing all application extremes. All listed substitutes share package geometry and functional characteristics, eliminating PCB redesign requirements.

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