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S2S3LB
Sharp Microelectronics
OPTOISOLATOR 3.75KV TRIAC 4SMD
2612 Pcs New Original In Stock
Optoisolator Triac Output 3750Vrms 1 Channel 4-SMD
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5.0 / 5.0
- (306 Ratings)
S2S3LB
Product Overview
7917317
DiGi Electronics Part Number
S2S3LB-DGManufacturer
Sharp Microelectronics
S2S3LB
Description
OPTOISOLATOR 3.75KV TRIAC 4SMDInventory
2612 Pcs New Original In Stock
Optoisolator Triac Output 3750Vrms 1 Channel 4-SMD
Quantity
Minimum 1
Minimum 1
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S2S3LB Technical Specifications
Category
Optoisolators, Triac, SCR Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Output Type
Triac
Zero Crossing Circuit
No
Number of Channels
1
Voltage - Isolation
3750Vrms
Voltage - Off State
600 V
Static dV/dt (Min)
100V/µs
Current - LED Trigger (Ift) (Max)
5mA
Current - On State (It (RMS)) (Max)
50 mA
Current - Hold (Ih)
3.5mA
Turn On Time
100µs (Max)
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Operating Temperature
-30°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SMD
Supplier Device Package
4-SMD
Approval Agency
CSA, UR
Base Product Number
S2S3L
Datasheet & Documents
Datasheets
Download S2S3LB Product Specification (PDF)
HTML Datasheet
S2S3LB-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
425-1299-1
425-1299-2
Standard Package
3,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
J’ai apprécié l’organisation du site qui facilite la navigation entre différentes catégories.
December 02, 2025
Der Kundenservice ist schnell, höflich und sehr kompetent.
December 02, 2025
DiGi's reliable delivery and responsive after-sales service stand out in the industry.
December 02, 2025
Excellent delivery speed; I received my order ahead of schedule.
December 02, 2025
The website loads quickly even during peak times, which I appreciate.
December 02, 2025
Clear communication about prices helps me make informed buying choices.
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Frequently Asked Questions (FAQ)
Given the Sharp S2S3LB optoisolator is obsolete, what are the critical design risks and practical selection considerations when choosing a direct replacement like the ON Semiconductor FODM3052R2-NF098 for a 600V AC control application?
When replacing the obsolete Sharp S2S3LB with the ON Semiconductor FODM3052R2-NF098, a primary design risk is ensuring the 600V off-state voltage rating is met under all operational conditions, especially considering potential transients. The FODM3052R2-NF098 has a VDRM (peak repetitive off-state voltage) of 600V, which is comparable. However, critically assess the static dV/dt (rated at 1000V/µs for the FODM3052R2-NF098, significantly higher than the S2S3LB's 100V/µs) to prevent false triggering in noisy environments. Also, verify the LED trigger current (Ift) compatibility; while the S2S3LB requires up to 5mA, the FODM3052R2-NF098 has an Ift of 3mA (typical), which might necessitate a slight adjustment in your LED drive circuitry to ensure reliable turn-on. Finally, confirm the package dimensions and pinout are compatible with your existing PCB layout to avoid costly re-spins.
What are the potential reliability implications of using a RoHS non-compliant optoisolator like the Sharp S2S3LB in a new product design, and how does this compare to compliant alternatives such as the ON Semiconductor FODM3052R2-NF098?
Using a RoHS non-compliant optoisolator like the Sharp S2S3LB in a new product design poses significant future reliability and market access risks. While the device itself might function within specifications, its non-compliance can lead to rejection in markets with strict environmental regulations (e.g., Europe). Furthermore, if the device contains restricted substances (like lead), it could contribute to long-term reliability issues through material degradation or joint failures, especially under thermal cycling. In contrast, the ON Semiconductor FODM3052R2-NF098 is RoHS compliant, indicating it adheres to environmental standards and typically uses materials less prone to long-term degradation, thus offering superior future-proofing and market acceptance for the Sharp S2S3LB replacement.
For an application requiring the Sharp S2S3LB optoisolator's 3.75kVrms isolation, what is the most critical design consideration to ensure the replacement FODM3052R2-NF098 maintains equivalent safety and prevents breakdown under high voltage stress?
When ensuring equivalent safety with the Sharp S2S3LB's 3.75kVrms isolation using a replacement like the ON Semiconductor FODM3052R2-NF098, the most critical design consideration is maintaining adequate creepage and clearance distances on the PCB. While both devices offer 3750Vrms isolation, the actual performance in a system is heavily dependent on the physical layout. Ensure the PCB trace widths, spacing between the high-voltage side and low-voltage side, and the placement of other components around the optoisolator on the FODM3052R2-NF098 meet or exceed the relevant safety standards (e.g., IEC 60950, IEC 62368) for the intended operating environment. Improper PCB layout can significantly reduce the effective isolation voltage, even with a component rated for high isolation like the S2S3LB or its replacement.
The Sharp S2S3LB optoisolator is described as having a 3.75KVrms isolation rating. When integrating the FODM3052R2-NF098 as a replacement, what is the primary concern regarding surge immunity and transient protection for the triac output stage, especially in environments prone to inductive load switching?
While both the Sharp S2S3LB and the ON Semiconductor FODM3052R2-NF098 offer a 3750Vrms isolation rating, the primary concern when replacing the S2S3LB with the FODM3052R2-NF098, especially with inductive loads, is the transient voltage suppression capability of the triac output. The FODM3052R2-NF098 has a higher static dV/dt rating (1000V/µs vs 100V/µs for S2S3LB), which helps prevent false turn-on due to rapid voltage changes. However, it does not inherently provide extensive surge immunity against high-energy transients that can occur when switching off inductive loads. You must implement external surge protection, such as a DIAC/TRIAC combination or an RC snubber network across the triac output, to absorb these energy spikes and protect the FODM3052R2-NF098 from exceeding its voltage and current ratings, thus ensuring the reliability of the S2S3LB replacement.
Considering the Sharp S2S3LB optoisolator lacks a zero-crossing circuit, what are the practical design implications and potential failure modes when using the replacement FODM3052R2-NF098, particularly for controlling resistive loads in a noisy AC line environment?
When substituting the Sharp S2S3LB optoisolator with the ON Semiconductor FODM3052R2-NF098, the absence of a zero-crossing circuit in both devices means that AC power is switched on at any point on the waveform, not just at the zero-crossing. This can lead to increased electromagnetic interference (EMI) and potential premature wear on both the controlled load and the optoisolator itself due to higher inrush currents and voltage spikes. For resistive loads in a noisy AC line, the primary failure risk is the triac output of the FODM3052R2-NF098 being triggered by high dV/dt transients, causing it to conduct when it should be off, or failing to commutate off cleanly. To mitigate this for the S2S3LB replacement, consider adding an external snubber circuit (RC network) across the triac to smooth voltage transitions and suppress transients, thereby improving the reliability and reducing EMI when controlling loads with the FODM3052R2-NF098.
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S2S3LB CAD Models
Sharp Microelectronics S2S3LB PCB symbols & footprints
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