EL814S(TD) Equivalent & Substitute Parts Reference

Part Overview

The EL814S(TD) is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage in a 4-SMD surface mount package, designed for AC and DC input applications. The part is currently active in production with 1089 pieces in stock inventory. Equivalent and substitute parts are identified to support component procurement flexibility, supply chain continuity, and design standardization across manufacturing environments.

Substiute Parts

EL814S(TD)

Everlight Electronics Co LtdIn Stock: 1179EL814S(TD) Datasheet

Current PartRFQ

LTV-814HS

Lite-On Inc.In Stock: 17026LTV-814HS Datasheet

SimilarRFQ

LTV-814HS-TA1

Lite-On Inc.In Stock: 2229LTV-814HS-TA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL814S(TD) are identified based on strict electrical and mechanical parameter compatibility within the optoisolator transistor output category. The following parameters define substitution eligibility:

Critical Matching Parameters:

• Voltage - Isolation: 5000Vrms (exact match required)
• Number of Channels: 1 (exact match required)
• Output Type: Transistor (exact match required)
• Input Type: AC, DC (exact match required)
• Package / Case: 4-SMD, Gull Wing (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Parameter Variations: Substitute parts may differ in Current Transfer Ratio ranges, Rise/Fall Time specifications, maximum output voltage, forward voltage characteristics, and operating temperature ranges, provided the core isolation voltage, channel count, output topology, and physical package remain identical.

The identified substitutes (LTV-814HS and LTV-814HS-TA1) meet all critical matching parameters and are manufactured by Lite-On Inc., an established optoisolator supplier with equivalent RoHS3 compliance and MSL ratings.

Parameter Comparison

Engineering Selection Recommendations

EL814S(TD) - Primary Selection The EL814S(TD) is the original specified component with active production status. It provides the widest operating temperature range (-55°C to 110°C) and highest maximum output voltage (80V). Selection of this part is appropriate when the original design specifications and thermal performance requirements are critical.

LTV-814HS - Substitute Selection (Tube Packaging) The LTV-814HS is a direct functional equivalent manufactured by Lite-On Inc. with identical isolation voltage, channel count, and package configuration. This substitute maintains ROHS3 compliance and MSL Level 1 rating. The LTV-814HS is supplied in tube packaging and is suitable for applications where the operating temperature range of -30°C to 100°C and maximum output voltage of 35V are within design specifications. This part has higher inventory availability (16,958 pieces in stock).

LTV-814HS-TA1 - Substitute Selection (Tape & Reel Packaging) The LTV-814HS-TA1 is functionally identical to the LTV-814HS with the same electrical specifications. This variant is supplied in Tape & Reel (TR) packaging, appropriate for high-volume automated assembly processes. ROHS3 compliance and MSL Level 1 rating are maintained. Inventory availability is 2,200 pieces in stock.

Compliance Considerations All three parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, supporting equivalent handling and storage requirements. The LTV-814HS and LTV-814HS-TA1 carry REACH Unaffected status, providing additional regulatory documentation.

Frequently Asked Questions (FAQ)

Q: Can the LTV-814HS be used as a direct replacement for the EL814S(TD)?

A: The LTV-814HS is functionally equivalent for applications where the operating temperature range of -30°C to 100°C and maximum output voltage of 35V satisfy design requirements. Both parts share identical isolation voltage (5000Vrms), channel count (1), output type (transistor), input type (AC/DC), and 4-SMD package configuration. Design verification is required if the EL814S(TD) was selected for its extended temperature range (-55°C to 110°C) or higher output voltage capability (80V).

Q: What is the difference between LTV-814HS and LTV-814HS-TA1?

A: The LTV-814HS and LTV-814HS-TA1 are electrically identical. The primary difference is packaging: LTV-814HS is supplied in tube packaging, while LTV-814HS-TA1 is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly, while tube packaging is suitable for manual or semi-automated handling.

Q: Are there any electrical performance differences between the EL814S(TD) and LTV-814HS substitutes?

A: Yes. The EL814S(TD) specifies Current Transfer Ratio of 20% to 300% at 1mA input current, while LTV-814HS and LTV-814HS-TA1 specify 20% to 80% at 100mA input current. The EL814S(TD) has a maximum output voltage of 80V compared to 35V for the Lite-On substitutes. The EL814S(TD) also has a wider operating temperature range (-55°C to 110°C versus -30°C to 100°C). Rise and fall times differ: EL814S(TD) is 7µs and 11µs respectively, while LTV-814HS variants are 4µs and 3µs respectively.

Q: Do all three parts have the same RoHS and moisture sensitivity compliance?

A: Yes. All three parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) ratings, indicating equivalent environmental compliance and unlimited shelf life under controlled storage conditions.

Q: Which substitute should be selected for high-volume production?

A: The LTV-814HS-TA1 in Tape & Reel packaging is optimized for high-volume automated assembly processes. The LTV-814HS in tube packaging is suitable for lower-volume or manual assembly operations. Both maintain identical electrical specifications and compliance ratings.

Q: What inventory considerations apply to these parts?

A: The EL814S(TD) has 1,089 pieces in stock. The LTV-814HS has significantly higher availability at 16,958 pieces. The LTV-814HS-TA1 has 2,200 pieces available. Substitute selection may be influenced by procurement lead times and inventory requirements.