H11B815W Optoisolator Equivalent & Substitute Parts

Part Overview

The H11B815W is a 5000Vrms Darlington output optoisolator manufactured by onsemi in a 4-DIP through-hole package. This component provides galvanic isolation for DC input signals with high current transfer ratio performance (600% to 7500% @ 1mA). The H11B815W is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from Isocom Components and LITEON.

Substiute Parts

H11B815W

onsemiIn Stock: 805H11B815W Datasheet

Current PartRFQ

ISP815-1

Isocom Components 2004 LTDIn Stock: 976ISP815-1 Datasheet

SimilarRFQ

ISP815-2

Isocom Components 2004 LTDIn Stock: 1115ISP815-2 Datasheet

SimilarRFQ

ISP815-3

Isocom Components 2004 LTDIn Stock: 1024ISP815-3 Datasheet

SimilarRFQ

LTV-815M

LITEONIn Stock: 2987LTV-815M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the H11B815W are qualified based on the following electrical and mechanical compatibility criteria:

Primary Compatibility Parameters:

• Single channel Darlington output optoisolator configuration
• 4-DIP through-hole package format
• Isolation voltage rating of 5000Vrms or higher
• Current transfer ratio minimum of 600% @ 1mA or higher
• Maximum output voltage of 35V or higher
• Maximum output current of 80mA or higher
• Vce saturation maximum of 1V or lower
• DC input type
• Voltage forward (Vf) of 1.2V
• Maximum DC forward current (If) of 50mA

Substitute parts are grouped into two categories based on isolation voltage and package dimensions:

Group 1 - Isocom ISP815 Series (ISP815-1, ISP815-2, ISP815-3): Higher isolation voltage (5300Vrms), improved rise/fall time performance (60µs, 53µs), reduced package footprint (0.300", 7.62mm), active product status with RoHS3 compliance.

Group 2 - LITEON LTV-815M: Matched isolation voltage (5000Vrms), identical current transfer ratio range (600% to 7500% @ 1mA), standard package footprint (0.400", 10.16mm), active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

LTV-815M (LITEON) is the primary substitute for direct replacement of the H11B815W. This part maintains identical isolation voltage (5000Vrms), current transfer ratio range (600% to 7500% @ 1mA), maximum output voltage (35V), and output current (80mA). The package footprint is identical (4-DIP 0.400", 10.16mm), requiring no PCB layout modifications. LTV-815M is active with RoHS3 compliance and has 2888 units in stock.

ISP815 Series (ISP815-1, ISP815-2, ISP815-3) from Isocom Components are qualified substitutes with enhanced electrical performance. These parts provide higher isolation voltage (5300Vrms), improved rise/fall time characteristics (60µs, 53µs versus 300µs, 250µs), and higher maximum output voltage (70V). The reduced package footprint (4-DIP 0.300", 7.62mm) requires PCB layout verification for pin spacing compatibility. All three variants are active with RoHS3 compliance. ISP815-1, ISP815-2, and ISP815-3 have 932, 1098, and 977 units in stock respectively.

All substitute parts meet the core electrical requirements: single-channel Darlington output configuration, DC input type, 1V maximum Vce saturation, 1.2V typical forward voltage, and 50mA maximum DC forward current. Operating temperature range differs; the H11B815W operates from -55°C to 100°C, while all substitutes operate from -30°C to 100°C. Applications requiring extended low-temperature operation below -30°C must retain the H11B815W or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can ISP815 series parts replace H11B815W in existing designs without PCB modification?

A: ISP815-1, ISP815-2, and ISP815-3 use a reduced package footprint (4-DIP 0.300", 7.62mm) compared to H11B815W (4-DIP 0.400", 10.16mm). PCB layout verification is required to confirm pin spacing compatibility with existing through-hole footprints. LTV-815M maintains the identical 0.400" package footprint and requires no layout changes.

Q: What are the key electrical differences between H11B815W and its substitutes?

A: LTV-815M provides electrical equivalence with identical isolation voltage (5000Vrms) and current transfer ratio range (600% to 7500% @ 1mA). ISP815 series parts offer higher isolation voltage (5300Vrms) and faster rise/fall times (60µs, 53µs) but do not specify maximum current transfer ratio. All substitutes maintain 1V maximum Vce saturation and 1.2V typical forward voltage.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. ISP815-1, ISP815-2, ISP815-3, and LTV-815M are all ROHS3 compliant. The H11B815W RoHS status is not specified in available documentation.

Q: What is the operating temperature range difference?

A: H11B815W operates from -55°C to 100°C. All substitute parts (ISP815 series and LTV-815M) operate from -30°C to 100°C. Applications requiring operation below -30°C must use H11B815W or identify alternative solutions outside this product family.

Q: Which substitute part is recommended for new designs?

A: LTV-815M is recommended for direct replacement with no design changes. ISP815 series parts are recommended when improved isolation voltage and faster switching performance are beneficial and PCB layout can accommodate the reduced package footprint.

Q: Are all parts available in through-hole mounting?

A: Yes. H11B815W, ISP815-1, ISP815-2, ISP815-3, and LTV-815M are all through-hole mounted components in 4-DIP packages.