K815P Optoisolator Equivalent & Substitute Parts

Part Overview

The K815P is a 5300Vrms isolation optoisolator with Darlington output manufactured by Vishay Semiconductor Opto Division. This single-channel 4-DIP component is designed for high-voltage isolation applications requiring galvanic separation between input and output circuits. The K815P carries a Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently using this component.

Substiute Parts

K815P

Vishay Semiconductor Opto DivisionIn Stock: 20329K815P Datasheet

Current PartRFQ

SFH619A

Vishay Semiconductor Opto DivisionIn Stock: 256202SFH619A Datasheet

MFR RecommendedRFQ

EL815

Everlight Electronics Co LtdIn Stock: 1475EL815 Datasheet

MFR RecommendedRFQ

LTV-815

Lite-On Inc.In Stock: 45282LTV-815 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the K815P is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms (K815P specifies 5300Vrms)
• Output Type: Darlington configuration required
• Number of Channels: Single channel
• Package / Case: 4-DIP (0.300", 7.62mm) form factor
• Mounting Type: Through Hole
• Input Type: DC
• Current Transfer Ratio (Min): Minimum 600% @ 1mA
• Current - Output / Channel: Minimum 80mA capability
• Voltage - Forward (Vf): 1.2V typical
• RoHS Compliance: ROHS3 Compliant

All substitute parts listed meet or exceed these core electrical and mechanical requirements, ensuring functional compatibility within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

SFH619A (Vishay Semiconductor Opto Division) is the primary recommended substitute. It maintains identical isolation voltage (5300Vrms) and package form factor. The SFH619A demonstrates superior current transfer ratio performance (1000% @ 1mA versus 600%), higher maximum output current (125mA versus 80mA), and extended maximum output voltage rating (300V versus 35V). Product status is Active, ensuring ongoing availability and supply chain stability. ROHS3 compliance is maintained.

EL815 (Everlight Electronics Co Ltd) and LTV-815 (Lite-On Inc.) are secondary substitutes. Both components operate at 5000Vrms isolation voltage, which is 300Vrms lower than the K815P specification. Both maintain the required 4-DIP package, Darlington output configuration, and 80mA output current rating. EL815 extends the operating temperature range to -55°C ~ 110°C. LTV-815 provides the widest inventory availability (45200 Pcs). Both maintain ROHS3 compliance and Active product status.

Selection between SFH619A and the secondary substitutes depends on application-specific isolation voltage requirements. Applications requiring 5300Vrms isolation must use SFH619A. Applications tolerating 5000Vrms isolation may select EL815 or LTV-815 based on temperature range and availability requirements.

Frequently Asked Questions (FAQ)

Q: Can SFH619A directly replace K815P in all applications?

A: SFH619A meets or exceeds all critical K815P parameters including isolation voltage (5300Vrms), package form factor (4-DIP), output type (Darlington), and current transfer ratio (1000% minimum). Direct substitution is supported for applications within the specified parameter envelope.

Q: What is the key difference between SFH619A and EL815/LTV-815?

A: SFH619A maintains 5300Vrms isolation voltage matching the K815P specification. EL815 and LTV-815 operate at 5000Vrms isolation voltage. Applications requiring 5300Vrms isolation must use SFH619A. Applications with 5000Vrms isolation requirements may use EL815 or LTV-815.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. K815P, SFH619A, EL815, and LTV-815 are all ROHS3 Compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the operating temperature range difference between substitutes?

A: K815P operates -40°C ~ 100°C. SFH619A extends the lower limit to -55°C. EL815 extends both limits to -55°C ~ 110°C. LTV-815 operates -30°C ~ 100°C. Temperature range selection depends on application environmental requirements.

Q: Do all substitutes use the same 4-DIP package?

A: Yes. K815P, SFH619A, EL815, and LTV-815 all use 4-DIP (0.300", 7.62mm) Through Hole package configuration, ensuring mechanical compatibility with existing PCB designs.

Q: What is the current transfer ratio performance difference?

A: K815P specifies 600% minimum current transfer ratio @ 1mA. SFH619A provides 1000% minimum, offering superior gain performance. EL815 and LTV-815 match the K815P specification at 600% minimum. Higher current transfer ratio provides improved switching characteristics and reduced input current requirements.

Q: Which substitute has the best inventory availability?

A: LTV-815 has the highest inventory level at 45200 Pcs New Original In Stock, followed by SFH619A at 256100 Pcs, EL815 at 1390 Pcs, and K815P at 20300 Pcs (Last Time Buy status).