Equivalent & Substitute Parts for K3020P Optoisolator

Part Overview

The K3020P is a 5.3 kVrms optoisolator with triac output manufactured by Vishay Semiconductor Opto Division in a 6-DIP package. This component provides galvanic isolation for AC switching applications with a single triac output channel. The K3020P is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute optoisolators must maintain compatibility across isolation voltage, output type, package configuration, and electrical performance parameters.

Key Parameters

Parameter	K3020P Value	Unit
Voltage - Isolation	5300	Vrms
Voltage - Off State	400	V
Output Type	Triac	-
Number of Channels	1	-
Current - LED Trigger (Ift) Max	30	mA
Current - On State (It RMS) Max	100	mA
Current - Hold (Ih)	200	µA
Voltage - Forward (Vf) Typ	1.3	V
Current - DC Forward (If) Max	80	mA
Operating Temperature Range	-55 to 100	°C
Package / Case	6-DIP (0.300", 7.62mm)	-
Mounting Type	Through Hole	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute optoisolators for the K3020P are selected based on the following critical parameters:

Mandatory Compatibility Criteria:

Output Type: Triac (single channel)
Isolation Voltage: Minimum 5000 Vrms (K3020P operates at 5300 Vrms)
Package Configuration: 6-DIP through-hole mounting
Off-State Voltage: 400 V
Operating Temperature: -55°C to 100°C
RoHS3 Compliance

Electrical Performance Parameters:

Current - On State (It RMS): 100 mA maximum
Current - Hold (Ih): Minimum 200 µA
Voltage - Forward (Vf): Approximately 1.18 to 1.3 V
Current - DC Forward (If): Maximum 60 to 80 mA

The substitute parts are grouped into two categories based on package dimensions and LED trigger current specifications:

Group 1 - Standard 6-DIP (0.300", 7.62mm): EL3021-V, EL3022-V, EL3023-V Group 2 - Wide 6-DIP (0.400", 10.16mm): EL3021M, EL3021M-V, EL3022M, EL3022M-V, EL3023M, EL3023M-V Group 3 - Direct Equivalent: MOC3020

All substitute parts maintain the same triac output topology, isolation voltage rating of 5000 Vrms or higher, and thermal operating range as the K3020P.

Parameter Comparison

Parameter	K3020P	EL3021-V	EL3022-V	EL3023-V	EL3021M	EL3022M	EL3023M	MOC3020
Manufacturer	Vishay	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	onsemi
Voltage - Isolation (Vrms)	5300	5000	5000	5000	5000	5000	5000	5300
Voltage - Off State (V)	400	400	400	400	400	400	400	400
Output Type	Triac	Triac	Triac	Triac	Triac	Triac	Triac	Triac
Number of Channels	1	1	1	1	1	1	1	1
Current - LED Trigger (Ift) Max (mA)	30	15	10	5	15	10	5	30
Current - On State (It RMS) Max (mA)	100	100	100	100	100	100	100	-
Current - Hold (Ih) (µA)	200	250	250	250	250	250	250	100
Voltage - Forward (Vf) Typ (V)	1.3	1.18	1.18	1.18	1.18	1.18	1.18	-
Current - DC Forward (If) Max (mA)	80	60	60	60	60	60	60	50
Operating Temperature (°C)	-55 to 100	-55 to 100	-55 to 100	-55 to 100	-55 to 100	-55 to 100	-55 to 100	-55 to 100
Package / Case	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.400", 10.16mm)	6-DIP (0.400", 10.16mm)	6-DIP (0.400", 10.16mm)	6-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: MOC3020 from onsemi provides the closest electrical match to K3020P with identical 5300 Vrms isolation voltage and 30 mA LED trigger current. Both components are classified as obsolete, but MOC3020 maintains higher inventory availability (19,238 units in stock). This part is suitable for direct pin-compatible substitution in existing designs without circuit modification.

Secondary Recommendation - Active Production Alternatives: Everlight Electronics EL3021-V, EL3022-V, and EL3023-V series offer active product status with ROHS3 compliance. These parts operate at 5000 Vrms isolation voltage, which is acceptable for applications designed for 5300 Vrms operation with appropriate safety margin verification. The EL3021-V variant matches the 15 mA LED trigger current specification most closely to K3020P requirements. All three variants are available in the standard 6-DIP (0.300", 7.62mm) package matching K3020P footprint.

Alternative for Wide Package Compatibility: EL3021M, EL3022M, and EL3023M variants provide the same electrical performance as their standard-package counterparts but in a wider 6-DIP (0.400", 10.16mm) configuration. These are suitable only if PCB layout accommodates the increased package width.

Selection Criteria by Application:

For direct PCB compatibility without layout modification: MOC3020, EL3021-V, EL3022-V, or EL3023-V
For new designs requiring active product status: EL3021-V, EL3022-V, or EL3023-V
For applications with lower LED trigger current requirements: EL3023-V (5 mA) or EL3023M (5 mA)
For applications requiring higher LED trigger current tolerance: EL3021-V (15 mA) or EL3021M (15 mA)

All recommended substitutes maintain the same operating temperature range (-55°C to 100°C), triac output topology, and through-hole mounting configuration as the K3020P.

Frequently Asked Questions (FAQ)

Q: Can EL3021-V, EL3022-V, or EL3023-V be used as direct replacements for K3020P? A: Yes, these Everlight parts are pin-compatible substitutes in the standard 6-DIP (0.300", 7.62mm) package. The 5000 Vrms isolation voltage is lower than K3020P's 5300 Vrms rating but remains within acceptable substitution parameters for most applications. Verify isolation voltage requirements in your specific circuit design.

Q: What is the difference between EL3021-V, EL3022-V, and EL3023-V? A: The primary difference is the LED trigger current specification. EL3021-V requires 15 mA maximum trigger current, EL3022-V requires 10 mA, and EL3023-V requires 5 mA. All three maintain identical isolation voltage (5000 Vrms), on-state current (100 mA), and package dimensions. Select based on your input drive circuit's current capability.

Q: Why do EL3021M, EL3022M, and EL3023M have different package dimensions? A: The "M" designation indicates a wider 6-DIP package (0.400", 10.16mm) compared to the standard 6-DIP (0.300", 7.62mm). This affects PCB footprint and spacing requirements. Use only if your PCB layout accommodates the wider package width.

Q: Is MOC3020 still available if K3020P is obsolete? A: MOC3020 is also classified as obsolete but maintains significantly higher inventory (19,238 units in stock). It provides identical electrical specifications to K3020P, including 5300 Vrms isolation voltage and 30 mA LED trigger current, making it the closest technical equivalent.

Q: What certifications do the substitute parts carry? A: Everlight EL-series parts carry CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, and VDE certifications depending on variant. MOC3020 does not list specific approval agencies. K3020P carries BSI, CQC, CSA, cUR, UR, and VDE certifications. Verify certification requirements for your application's regulatory compliance.

Q: Are all substitute parts ROHS3 compliant? A: All Everlight EL-series substitutes (EL3021, EL3022, EL3023 variants) are ROHS3 compliant. MOC3020 does not specify RoHS status. K3020P is ROHS3 compliant.

Q: Can I use parts with lower LED trigger current (EL3023-V at 5 mA) if my circuit drives 30 mA? A: Yes. Lower trigger current specifications indicate the part will activate at lower input current levels. If your circuit supplies 30 mA, any substitute with a maximum trigger current of 30 mA or less will function correctly. EL3023-V (5 mA maximum) will activate reliably with 30 mA input drive.

Q: What is the impact of the 300 µA difference in hold current between K3020P (200 µA) and Everlight substitutes (250 µA)? A: The hold current difference is minimal and does not affect substitution suitability. Hold current determines the minimum current required to maintain triac conduction. The 50 µA increase in Everlight parts is negligible for typical AC switching applications and does not require circuit redesign.

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