PS8101-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS8101-A is a single-channel optoisolator with transistor output manufactured by CEL, rated for 3750Vrms isolation voltage in a 5-SOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. The PS8101-A provides DC input isolation with 8mA output current capability and operates across the temperature range of -55°C to 100°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	PS8101-A
Manufacturer	CEL
Category	Optoisolators
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	3750Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Current Transfer Ratio (Max)	35% @ 16mA
Turn On / Turn Off Time (Typ)	500ns, 600ns
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.7V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	6-SOIC (0.173", 4.40mm Width), 5 Leads
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PS8101-A optoisolator is determined by the following critical parameters:

Primary Substitution Criteria:

Single-channel transistor output optoisolator configuration
Isolation voltage rating of 3750Vrms or higher
Surface mount package with 5-lead 6-SOIC footprint (0.173", 4.40mm width)
DC input type with transistor output stage
Maximum output current of 8mA per channel
Operating temperature range compatibility or extension

Secondary Compatibility Factors:

Current transfer ratio performance at specified test conditions
Turn-on and turn-off switching times
Maximum output voltage rating
Forward voltage characteristics of the input LED stage
Moisture sensitivity level MSL 1 (unlimited)

Substitute parts are grouped into two categories based on isolation voltage rating: parts rated at 3750Vrms (direct voltage match) and parts rated at 4000Vrms (higher isolation capability). Both categories maintain the same mechanical footprint, electrical interface, and functional output characteristics required for PS8101-A replacement.

Parameter Comparison

Parameter	PS8101-A	ACPL-M43U-000E	ACPL-M43U-500E	ACPL-M50L-000E	ACPL-M50L-060E	ACPL-M43T	ACPL-M43T-000E	ACPL-M43T-500	ACPL-M43T-500E	ACPL-M49T-000E	ACPL-M49T-500E
Manufacturer	CEL	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	4000Vrms	4000Vrms	4000Vrms	4000Vrms	4000Vrms	4000Vrms
Current Transfer Ratio (Min)	15% @ 16mA	32% @ 10mA	32% @ 10mA	100% @ 3mA	100% @ 3mA	32% @ 10mA	32% @ 10mA	32% @ 10mA	32% @ 10mA	32% @ 10mA	32% @ 10mA
Current Transfer Ratio (Max)	35% @ 16mA	80% @ 10mA	80% @ 10mA	200% @ 3mA	200% @ 3mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	80% @ 10mA	80% @ 10mA
Turn On / Turn Off Time (Typ)	500ns, 600ns	200ns, 300ns	200ns, 300ns	200ns, 380ns	200ns, 380ns	150ns, 500ns	150ns, 500ns	150ns, 500ns	150ns, 500ns	Not specified	Not specified
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	35V	20V	20V	24V	24V	20V	20V	20V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.7V	1.5V	1.5V	1.5V	1.5V	1.55V	1.55V	1.55V	1.55V	1.5V	1.5V
Current - DC Forward (If) (Max)	25mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Operating Temperature	-55°C ~ 100°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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	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
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Voltage Replacement (3750Vrms Isolation):

The ACPL-M43U-000E and ACPL-M43U-500E from Broadcom Limited provide exact isolation voltage matching at 3750Vrms. Both parts are active products with ROHS3 compliance and extended operating temperature range (-40°C to 125°C). These parts feature improved current transfer ratio performance (32% to 80% @ 10mA) compared to the PS8101-A and faster switching times (200ns turn-on, 300ns turn-off). The ACPL-M43U-500E is available in Tape & Reel packaging with 3592 units in stock, while ACPL-M43U-000E is supplied in Tube packaging with 3068 units available.

For Higher Isolation Voltage (4000Vrms Isolation):

The ACPL-M43T series (ACPL-M43T, ACPL-M43T-000E, ACPL-M43T-500, ACPL-M43T-500E) and ACPL-M49T series (ACPL-M49T-000E, ACPL-M49T-500E) provide 4000Vrms isolation, exceeding the PS8101-A specification. The ACPL-M43T variants include automotive-grade qualification (AEC-Q100) and are available in multiple packaging options. ACPL-M43T-500E offers the highest inventory (17654 units) in Cut Tape & Digi-Reel packaging with ROHS3 compliance. The ACPL-M49T-500E provides 33200 units in stock with ROHS3 compliance and extended temperature range.

For Enhanced Current Transfer Ratio:

The ACPL-M50L series (ACPL-M50L-000E, ACPL-M50L-060E) delivers superior current transfer ratio performance (100% to 200% @ 3mA) with 3750Vrms isolation matching. These parts support higher maximum output voltage (24V) and feature ROHS3 compliance. ACPL-M50L-060E is available with 1158 units in Tube packaging.

Product Status Consideration:

All recommended substitute parts carry Active product status, ensuring long-term availability and manufacturing support. The PS8101-A obsolete status necessitates transition to one of these active alternatives for new designs and ongoing production requirements.

Frequently Asked Questions (FAQ)

Q1: Can ACPL-M43T series parts directly replace PS8101-A in existing designs?

A: Yes, ACPL-M43T series parts are direct pin-compatible replacements. All parts share the identical 6-SOIC 5-lead package footprint (0.173", 4.40mm width). The higher 4000Vrms isolation rating provides additional safety margin. However, the maximum output voltage is reduced from 35V to 20V, and maximum forward current is reduced from 25mA to 20mA. Circuit designs must accommodate these parameter differences.

Q2: What is the key difference between ACPL-M43U and ACPL-M43T variants?

A: ACPL-M43U maintains the exact 3750Vrms isolation voltage of the PS8101-A, while ACPL-M43T provides higher 4000Vrms isolation. Both share identical package, pin configuration, and output current specifications. ACPL-M43U features faster switching times (200ns/300ns vs 150ns/500ns) and lower current transfer ratio range (32-80% vs 32-100%).

Q3: What packaging options are available for substitute parts?

A: Substitute parts are supplied in multiple packaging formats: Tube (standard reel packaging), Tape & Reel (TR) for automated assembly, and Cut Tape (CT) & Digi-Reel for flexible quantity requirements. Selection depends on production volume and assembly equipment compatibility. All packaging options maintain identical electrical and mechanical specifications.

Q4: Are automotive-qualified alternatives available?

A: Yes, ACPL-M43T series parts carry AEC-Q100 automotive qualification. These parts are suitable for automotive and industrial applications requiring formal qualification documentation. Non-automotive variants (ACPL-M43U, ACPL-M49T, ACPL-M50L) are also available for general industrial use.

Q5: How do current transfer ratio specifications affect circuit design?

A: The PS8101-A specifies 15-35% CTR @ 16mA input current. Substitute parts specify CTR at different test conditions (typically 10mA or 3mA input). Higher CTR values indicate more efficient optical coupling and require lower input drive current for equivalent output performance. Circuit input current limiting resistors must be recalculated based on the substitute part's CTR specification and actual test conditions.

Q6: What is the significance of ROHS3 compliance on substitute parts?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. ACPL-M43T-000E, ACPL-M43T-500E, ACPL-M43U-000E, ACPL-M43U-500E, ACPL-M50L-000E, ACPL-M50L-060E, ACPL-M49T-000E, and ACPL-M49T-500E all carry ROHS3 compliance, suitable for European and global markets with environmental regulations.

Q7: Can ACPL-M50L parts be used as direct substitutes despite higher CTR?

A: ACPL-M50L parts are mechanically and electrically compatible but feature significantly higher current transfer ratio (100-200% @ 3mA). This requires substantially lower input drive current for equivalent output performance. Circuit input resistor values must be recalculated. The higher maximum output voltage (24V vs 20V) and different operating temperature range (-40°C to 105°C) must be evaluated for specific applications.

Q8: What inventory levels support production continuity?

A: ACPL-M49T-500E offers the highest inventory at 33200 units, followed by ACPL-M43T-500E with 17654 units. Both are available in standard packaging formats suitable for high-volume production. For lower-volume requirements, ACPL-M43U-500E (3592 units) and ACPL-M43U-000E (3068 units) provide adequate stock levels with matching isolation voltage.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message