FOD816SD Equivalent & Substitute Parts

Part Overview

The FOD816SD is an optoisolator with Darlington output manufactured by onsemi, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This component features a single channel configuration with 4-SMD surface mount packaging and Gull Wing leads. The FOD816SD is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	600% @ 1mA
Current Transfer Ratio (Max)	7500% @ 1mA
Output Type	Darlington
Voltage - Output (Max)	35V
Current - Output / Channel	80mA
Rise / Fall Time (Typ)	60µs, 53µs
Vce Saturation (Max)	1V
Operating Temperature	-30°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Input Type	AC, DC

Substitute Part Grouping Explanation

Substitute parts for the FOD816SD are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Current Transfer Ratio range: 600% to 7500% @ 1mA
Output Type: Darlington
Voltage - Output (Max): 35V
Current - Output / Channel: 80mA
Rise / Fall Time: 60µs, 53µs
Vce Saturation (Max): 1V
Operating Temperature: -30°C ~ 100°C
Package / Case: 4-SMD, Gull Wing
Input Type: AC, DC

All substitute parts listed maintain these exact specifications. Packaging format (Tube, Tape & Reel) represents the only variable parameter and does not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	FOD816SD (onsemi)	LTV-8141S (Lite-On)	LTV-8141S-TA (Lite-On)	LTV-8141S-TA1 (Lite-On)
Product Status	Obsolete	Active	Active	Active
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1
Current Transfer Ratio (Min)	600% @ 1mA	600% @ 1mA	600% @ 1mA	600% @ 1mA
Current Transfer Ratio (Max)	7500% @ 1mA	7500% @ 1mA	7500% @ 1mA	7500% @ 1mA
Output Type	Darlington	Darlington	Darlington	Darlington
Voltage - Output (Max)	35V	35V	35V	35V
Current - Output / Channel	80mA	80mA	80mA	80mA
Rise / Fall Time (Typ)	60µs, 53µs	60µs, 53µs	60µs, 53µs	60µs, 53µs
Vce Saturation (Max)	1V	1V	1V	1V
Operating Temperature	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Input Type	AC, DC	AC, DC	AC, DC	AC, DC
Packaging Format	Tube	Tube	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three Lite-On substitute parts (LTV-8141S, LTV-8141S-TA, LTV-8141S-TA1) are direct parametric equivalents to the obsolete FOD816SD. Selection between these substitutes is determined by packaging and supply requirements:

LTV-8141S is supplied in Tube packaging and maintains active product status with ROHS3 compliance certification.

LTV-8141S-TA is supplied in Tape & Reel format with active product status and ROHS3 compliance certification, suitable for automated assembly processes.

LTV-8141S-TA1 is supplied in Tape & Reel format with active product status and ROHS3 compliance certification, offering the highest current inventory availability at 45,342 pieces.

All substitute parts carry identical electrical specifications, mechanical dimensions, and thermal operating ranges. The choice between Tube and Tape & Reel packaging depends on production volume and assembly equipment compatibility. ROHS3 compliance of all substitute parts provides regulatory advantage over the original FOD816SD.

Frequently Asked Questions (FAQ)

Q: Can LTV-8141S, LTV-8141S-TA, and LTV-8141S-TA1 be used interchangeably with FOD816SD?

A: Yes. All three Lite-On parts are parametric equivalents with identical electrical characteristics, isolation voltage, output current, rise/fall times, and operating temperature ranges. They share the same 4-SMD Gull Wing package configuration and require no circuit modifications.

Q: What is the difference between LTV-8141S, LTV-8141S-TA, and LTV-8141S-TA1?

A: The three parts are electrically identical. The differences are packaging format and inventory availability. LTV-8141S uses Tube packaging. LTV-8141S-TA and LTV-8141S-TA1 use Tape & Reel format for automated assembly. LTV-8141S-TA1 has significantly higher stock availability.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats contain identical components. Packaging selection is based on assembly process requirements and production volume. Tape & Reel format is standard for high-volume automated assembly lines.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three Lite-On substitute parts carry ROHS3 compliance certification. The original FOD816SD does not specify RoHS status.

Q: What is the isolation voltage rating, and is it maintained across all parts?

A: All parts, including FOD816SD and all substitutes, maintain 5000Vrms isolation voltage rating. This specification is identical across all equivalent parts.

Q: Can these parts handle AC and DC input signals?

A: Yes. All parts support both AC and DC input types with identical input characteristics.

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