PS8101-K-A Optoisolator 3.75kV Transistor Output Equivalent & Substitute Parts

Part Overview

The PS8101-K-A is a 3.75kV optoisolator with transistor output in a 6-SOIC (5-lead) surface mount package, manufactured by CEL. This component provides galvanic isolation for DC input signals with a single output channel. The product status is obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	PS8101-K-A
Manufacturer	CEL
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	3750Vrms
Current Transfer Ratio (Min)	20% @ 16mA
Current Transfer Ratio (Max)	35% @ 16mA
Turn On Time (Typ)	500ns
Turn Off Time (Typ)	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)
REACH Status	REACH Affected
ECCN	EAR99
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PS8101-K-A is determined by the following critical electrical and mechanical parameters:

Isolation Voltage: The PS8101-K-A operates at 3750Vrms isolation. Substitute parts must meet or exceed this specification to maintain safety margins and regulatory compliance.

Package Compatibility: All substitutes must use the 6-SOIC (0.173", 4.40mm Width) surface mount package with 5 leads to ensure PCB layout compatibility without redesign.

Channel Configuration: Single-channel isolation is required; substitutes must be 1-channel optoisolators.

Input/Output Configuration: DC input with transistor output is mandatory for functional equivalence.

Output Current Capability: Substitute parts must support 8mA output current per channel.

Maximum Output Voltage: The PS8101-K-A supports 35V maximum output. Substitutes with 20V, 24V, or higher rated outputs are acceptable for applications operating within the original voltage limits.

Thermal Range: The PS8101-K-A operates from -55°C to 100°C. Substitutes with extended or equivalent temperature ranges (-40°C to 125°C or better) provide broader operational capability.

Moisture Sensitivity: MSL 1 (Unlimited) is maintained across all listed substitutes, ensuring consistent soldering and storage requirements.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Channels	CTR Min @ Test	Turn On/Off (ns)	Output Voltage Max	Output Current	Vf (Typ)	Temp Range	Package	Product Status	RoHS Status
PS8101-K-A	CEL	3750Vrms	1	20% @ 16mA	500, 600	35V	8mA	1.7V	-55°C ~ 100°C	6-SOIC, 5L	Obsolete	N/A
ACPL-M43T	Broadcom Limited	4000Vrms	1	32% @ 10mA	150, 500	20V	8mA	1.55V	-40°C ~ 125°C	6-SOIC, 5L	Active	RoHS non-compliant
ACPL-M43T-000E	Broadcom Limited	4000Vrms	1	32% @ 10mA	150, 500	20V	8mA	1.55V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M43T-500	Broadcom Limited	4000Vrms	1	32% @ 10mA	150, 500	20V	8mA	1.55V	-40°C ~ 125°C	6-SOIC, 5L	Active	RoHS non-compliant
ACPL-M43T-500E	Broadcom Limited	4000Vrms	1	32% @ 10mA	150, 500	20V	8mA	1.55V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M43U-000E	Broadcom Limited	3750Vrms	1	32% @ 10mA	200, 300	20V	8mA	1.5V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M43U-500E	Broadcom Limited	3750Vrms	1	32% @ 10mA	200, 300	20V	8mA	1.5V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M49T-000E	Broadcom Limited	4000Vrms	1	32% @ 10mA	—	20V	8mA	1.5V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M49T-500E	Broadcom Limited	4000Vrms	1	32% @ 10mA	—	20V	8mA	1.5V	-40°C ~ 125°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M50L-000E	Broadcom Limited	3750Vrms	1	100% @ 3mA	200, 380	24V	8mA	1.5V	-40°C ~ 105°C	6-SOIC, 5L	Active	ROHS3 Compliant
ACPL-M50L-060E	Broadcom Limited	3750Vrms	1	100% @ 3mA	200, 380	24V	8mA	1.5V	-40°C ~ 105°C	6-SOIC, 5L	Active	ROHS3 Compliant

Engineering Selection Recommendations

Active Status Priority: The PS8101-K-A is obsolete. All listed Broadcom Limited substitutes carry active product status, ensuring continued manufacturing support, availability, and technical documentation.

Isolation Voltage Equivalence: ACPL-M43T variants provide 4000Vrms isolation, exceeding the PS8101-K-A specification. ACPL-M43U and ACPL-M50L variants maintain the exact 3750Vrms isolation level of the original part.

Thermal Operating Range: The PS8101-K-A operates from -55°C to 100°C. All Broadcom substitutes extend the lower temperature boundary to -40°C and upper boundary to 125°C (or 105°C for ACPL-M50L series), providing superior thermal margins for most applications.

RoHS Compliance: ACPL-M43T-000E, ACPL-M43T-500E, ACPL-M43U-000E, ACPL-M43U-500E, ACPL-M49T-000E, ACPL-M49T-500E, ACPL-M50L-000E, and ACPL-M50L-060E are ROHS3 compliant, suitable for applications requiring environmental regulations compliance. Non-compliant variants (ACPL-M43T and ACPL-M43T-500) are available but restricted to applications where RoHS exemptions apply.

Automotive Qualification: ACPL-M43T variants carry AEC-Q100 automotive qualification. Select these parts for automotive or industrial applications requiring quality certifications.

Packaging Options: All substitutes are available in multiple packaging configurations: Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel®. Selection depends on production volume and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can ACPL-M43T series (4000Vrms) directly replace PS8101-K-A (3750Vrms)? A: Yes. The higher isolation voltage provides a safety margin above the original specification. Both parts use identical 6-SOIC 5-lead packages and support the same 8mA output current. Functionality is preserved across the specified input/output parameter range.

Q: What is the difference between ACPL-M43U and ACPL-M49T variants? A: Both maintain 3750Vrms isolation and use the same package. The primary difference is Turn On/Turn Off time specification: ACPL-M43U provides 200ns/300ns timing, while ACPL-M49T timing is not specified in the datasheet. ACPL-M43U is recommended when switching speed is critical.

Q: Which variant should be used for new designs? A: ACPL-M43T-500E and ACPL-M43U-500E are recommended for new designs. Both are ROHS3 compliant, carry active product status with production-grade packaging (Cut Tape & Digi-Reel®), and offer abundant inventory (17,654 Pcs and 3,592 Pcs respectively). ACPL-M43T-500E adds automotive-grade AEC-Q100 qualification.

Q: Are ACPL-M50L variants functionally equivalent? A: ACPL-M50L variants have higher Current Transfer Ratio (100% to 200% @ 3mA) compared to PS8101-K-A (20% to 35% @ 16mA) and provide higher output voltage (24V vs. 35V). They are electrically compatible but operate under different input and output specifications. Use only if the circuit design accommodates lower input current requirements and higher transfer ratios.

Q: What is the packaging difference between ACPL-M43T, ACPL-M43T-000E, and ACPL-M43T-500E? A: All three variants use identical 6-SOIC 5-lead packages and pinouts. The suffix indicates packaging format: Standard tube, Tube with RoHS3 compliance (-000E), or Tape & Reel with RoHS3 compliance (-500E). Selection is based on production volume and supply chain requirements, not functional differences.

Q: Is the PS8101-K-A compatible with applications requiring automotive certification? A: The PS8101-K-A does not carry automotive qualification. For applications requiring AEC-Q100 compliance, select ACPL-M43T or ACPL-M43T-000E variants, which meet automotive standards.

Q: What thermal derating applies to ACPL-M50L-060E? A: ACPL-M50L-060E maintains operating temperature from -40°C to 105°C, a narrower upper range than most other substitutes (which extend to 125°C). This variant is suitable for applications operating below 105°C; verify system thermal requirements before selection.

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