K3023P Optoisolator Triac Output Equivalent & Substitute Parts

Part Overview

The K3023P is a 5.3kVrms optoisolator with triac output manufactured by Vishay Semiconductor Opto Division in a 6-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The K3023P features a single-channel triac output configuration with 5mA LED trigger current and 100mA on-state current capability, suitable for high-voltage isolation applications requiring galvanic separation in industrial control and power switching circuits.

Key Parameters

Parameter	K3023P (Main Part)
Manufacturer	Vishay Semiconductor Opto Division
Output Type	Triac
Voltage - Isolation	5300Vrms
Voltage - Off State	400V
Current - LED Trigger (Ift) (Max)	5mA
Current - On State (It (RMS)) (Max)	100mA
Current - Hold (Ih)	200µA (Typ)
Voltage - Forward (Vf) (Typ)	1.3V
Current - DC Forward (If) (Max)	80mA
Operating Temperature	-55°C to 100°C
Package / Case	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the K3023P is determined by the following critical parameters:

Electrical Compatibility Criteria:

Output Type: Triac (non-negotiable)
Voltage - Isolation: Minimum 5000Vrms (K3023P specifies 5300Vrms; lower isolation ratings are not acceptable)
Voltage - Off State: 400V (standard across all candidates)
Current - On State (It (RMS)): Minimum 100mA (must match or exceed)
Operating Temperature Range: -55°C to 100°C (must encompass or match)
Number of Channels: 1 (single channel required)

Mechanical Compatibility Criteria:

Mounting Type: Through Hole (required for PCB compatibility)
Package / Case: 6-DIP configuration (pin count and spacing must match)
Physical dimensions: 0.300" (7.62mm) or 0.400" (10.16mm) body width (both acceptable for through-hole mounting with standard DIP sockets)

Regulatory & Compliance Criteria:

RoHS3 Compliance: Required
Moisture Sensitivity Level: 1 (Unlimited) preferred

Substitute parts are grouped into two categories based on package body width: standard 0.300" (7.62mm) and wider 0.400" (10.16mm) variants. Both are mechanically compatible with standard 6-DIP through-hole footprints, though PCB layout must accommodate the selected width.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Ift (Max)	It (RMS) (Max)	Ih (Typ)	Vf (Typ)	If (Max)	Package Width	Product Status	Certifications
K3023P	Vishay	5300Vrms	5mA	100mA	200µA	1.3V	80mA	0.300" (7.62mm)	Obsolete	BSI, CQC, CSA, cUR, UR, VDE
EL3021-V	Everlight	5000Vrms	15mA	100mA	250µA	1.18V	60mA	0.300" (7.62mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
EL3021M	Everlight	5000Vrms	15mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL
EL3021M-V	Everlight	5000Vrms	15mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
EL3022-V	Everlight	5000Vrms	10mA	100mA	250µA	1.18V	60mA	0.300" (7.62mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
EL3022M	Everlight	5000Vrms	10mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL
EL3022M-V	Everlight	5000Vrms	10mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
EL3023-V	Everlight	5000Vrms	5mA	100mA	250µA	1.18V	60mA	0.300" (7.62mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
EL3023M	Everlight	5000Vrms	5mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL
EL3023M-V	Everlight	5000Vrms	5mA	100mA	250µA	1.18V	60mA	0.400" (10.16mm)	Active	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE
MOC3020	onsemi	5300Vrms	30mA	—	100µA	—	50mA	0.300" (7.62mm)	Obsolete	—

Engineering Selection Recommendations

Primary Substitute: EL3023-V (Everlight Electronics)

The EL3023-V is the closest functional equivalent to the K3023P. It matches the critical LED trigger current specification (5mA), maintains 100mA on-state current capability, and is housed in the identical 0.300" (7.62mm) 6-DIP package. The EL3023-V has active product status with comprehensive international certifications (CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL, VDE), ensuring long-term availability and regulatory compliance. The isolation voltage is 5000Vrms, which is 300Vrms lower than the K3023P but remains within acceptable margins for most industrial applications. The forward voltage is slightly lower (1.18V vs. 1.3V), which may reduce LED drive circuit power dissipation.

Alternative Substitute: EL3023M-V (Everlight Electronics)

The EL3023M-V provides identical electrical performance to the EL3023-V but in a 0.400" (10.16mm) package body width. This variant is suitable for applications where PCB layout accommodates the wider body or where standard DIP sockets with increased spacing are already in use. It includes VDE certification in addition to other approvals.

Secondary Substitutes: EL3022-V and EL3022M-V (Everlight Electronics)

The EL3022 series offers 10mA LED trigger current, which is twice the K3023P specification. These parts are suitable for applications with higher LED drive current tolerance or where reduced LED brightness is acceptable. Both 0.300" and 0.400" package variants are available.

Tertiary Substitutes: EL3021-V, EL3021M, and EL3021M-V (Everlight Electronics)

The EL3021 series specifies 15mA LED trigger current, representing the highest drive requirement among available substitutes. These parts are appropriate only for applications where the circuit design can accommodate increased LED current or where the higher trigger threshold does not impact system performance.

Not Recommended: MOC3020 (onsemi)

Although the MOC3020 matches the 5300Vrms isolation voltage and 0.300" package dimensions of the K3023P, it is also classified as obsolete. The MOC3020 specifies 30mA LED trigger current and 100µA hold current, both significantly different from the K3023P. Substituting one obsolete part for another does not resolve long-term supply concerns.

Frequently Asked Questions (FAQ)

Q: Can I use EL3023-V as a direct drop-in replacement for K3023P?

A: The EL3023-V is mechanically and electrically compatible with the K3023P in standard through-hole PCB applications. Both use 6-DIP packages with 0.300" (7.62mm) body width and identical pin spacing. The isolation voltage difference (5000Vrms vs. 5300Vrms) is acceptable for most industrial control applications. LED drive circuit design should be verified to confirm that 5mA trigger current is achievable with existing resistor values.

Q: What is the difference between EL3023-V and EL3023M-V?

A: The primary difference is package body width. The EL3023-V uses a 0.300" (7.62mm) body, matching the K3023P footprint exactly. The EL3023M-V uses a 0.400" (10.16mm) body, which is wider but still compatible with standard 6-DIP through-hole sockets. Both have identical electrical specifications. The EL3023M-V includes VDE certification; the EL3023-V does not list VDE in its approval agencies.

Q: Why do the Everlight EL302x series have lower isolation voltage than the K3023P?

A: The K3023P specifies 5300Vrms isolation, while Everlight EL302x parts specify 5000Vrms. This 300Vrms difference reflects different design and testing methodologies between manufacturers. For applications requiring exactly 5300Vrms isolation, the lower-rated Everlight parts may not be suitable. However, for most industrial applications operating at standard mains voltages (120V, 230V, 400V), the 5000Vrms rating provides adequate safety margin.

Q: Can I substitute parts with different LED trigger currents (Ift)?

A: LED trigger current (Ift) is determined by the input LED circuit design. If the K3023P circuit uses a 5mA-rated LED drive resistor, substituting a part with 10mA or 15mA Ift requirement will result in insufficient LED current and unreliable triac triggering. Conversely, if the circuit can supply 10mA or 15mA, using a 5mA-rated part will work but may cause excessive LED power dissipation. Circuit redesign or resistor value adjustment may be necessary when changing Ift specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All Everlight EL302x substitute parts listed are RoHS3 compliant. The K3023P is also RoHS3 compliant. The MOC3020 does not specify RoHS status in the provided data.

Q: What certifications are most important for my application?

A: Certification requirements depend on end-use application and regional regulations. For North American applications, UL certification is typically required. For European applications, VDE and DEMKO certifications are standard. The EL3023-V and EL3023M-V include both UL and VDE certifications, making them suitable for global markets. Verify specific certification requirements with your application's regulatory framework before final part selection.

Q: Is the K3023P still available for purchase?

A: The K3023P is classified as obsolete. While inventory may exist in distributor stock (9299 pcs reported), long-term availability is not guaranteed. Active substitutes such as the EL3023-V series ensure continued supply for new designs and ongoing production.

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