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S2S4
Sharp Microelectronics
OPTOISOLATOR 3.75KV TRIAC 4SMD
5160 Pcs New Original In Stock
Optoisolator Triac Output 3750Vrms 1 Channel 4-SMD
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5.0 / 5.0
- (435 Ratings)
S2S4
Product Overview
7923617
DiGi Electronics Part Number
S2S4-DGManufacturer
Sharp Microelectronics
S2S4
Description
OPTOISOLATOR 3.75KV TRIAC 4SMDInventory
5160 Pcs New Original In Stock
Optoisolator Triac Output 3750Vrms 1 Channel 4-SMD
Quantity
Minimum 1
Minimum 1
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S2S4 Technical Specifications
Category
Optoisolators, Triac, SCR Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Output Type
Triac
Zero Crossing Circuit
Yes
Number of Channels
1
Voltage - Isolation
3750Vrms
Voltage - Off State
600 V
Static dV/dt (Min)
100V/µs
Current - LED Trigger (Ift) (Max)
10mA
Current - On State (It (RMS)) (Max)
50 mA
Current - Hold (Ih)
3.5mA
Turn On Time
50µs (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
S2S
Datasheet & Documents
Datasheets
Download S2S4 Product Specification (PDF)
HTML Datasheet
S2S4-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
425-1303-5
Standard Package
100
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
La rapidité de leur logistique combinée à leur engagement écologique est exceptionnel.
December 02, 2025
High-quality products combined with friendly service make DiGi Electronics my top choice.
December 02, 2025
I am impressed by how Di Digi Electronics balances cost efficiency with eco-awareness.
December 02, 2025
Their comprehensive after-sales support simplifies maintenance and technical queries.
December 02, 2025
The fast shipping coupled with friendly support created a very positive shopping environment.
December 02, 2025
The broad selection enhances their reputation as a comprehensive provider.
December 02, 2025
I am impressed by their swift shipping and professional customer service.
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Frequently Asked Questions (FAQ)
When replacing an obsolete S2S4 optoisolator in a critical application, what are the key design risks associated with selecting a substitute like the APT1211S, and how can I mitigate them to ensure reliable operation?
Replacing an obsolete S2S4 optoisolator with a substitute like the APT1211S requires careful consideration of several design risks. Primarily, verify that the APT1211S offers equivalent or superior static dV/dt (minimum 100V/µs for S2S4) to prevent false triggering of the triac, especially in noisy environments. Crucially, confirm its off-state voltage (600V for S2S4) is sufficient for your application to avoid breakdown. Also, check if the holding current (3.5mA for S2S4) is compatible with your load switching characteristics to prevent premature turn-off. Finally, ensure the trigger current (10mA max for S2S4) is achievable by your driving circuitry and that the turn-on time (50µs max for S2S4) meets your system's timing requirements. Thoroughly test the APT1211S in your specific circuit under worst-case conditions before full production to mitigate these risks.
For an S2S4 optoisolator operating near its 3750Vrms isolation voltage rating, what are the practical implications for PCB layout and creepage/clearance distances to prevent dielectric breakdown and ensure long-term reliability?
Operating an S2S4 optoisolator near its 3750Vrms isolation rating demands stringent PCB layout practices to prevent dielectric breakdown. Ensure sufficient creepage and clearance distances between the high-voltage side (triac output) and the low-voltage side (LED input) are maintained according to relevant safety standards (e.g., IEC 60664-1) for the expected pollution degree and overvoltage category. Consider using conformal coating on the PCB, especially in humid or contaminated environments, to further enhance insulation. Additionally, avoid placing vias or sharp component leads across the isolation barrier, as these can concentrate electric fields and initiate failure. Proper guarding or shielding techniques might also be necessary in extremely high-stress applications to reinforce the isolation integrity of the S2S4.
In a power control system utilizing the S2S4 optoisolator, what are the primary concerns regarding its static dV/dt (100V/µs min) and voltage-off state (600V) capabilities when switching inductive loads, and how can these be managed?
When switching inductive loads with the S2S4 optoisolator, the primary concerns related to its static dV/dt (minimum 100V/µs) and voltage-off state (600V) are the generation of high-voltage transients. Inductive loads can produce significant voltage spikes when the current is interrupted. If these spikes exceed the S2S4's off-state voltage rating or the rate of voltage rise surpasses its static dV/dt capability, it can lead to false triggering or even damage the optoisolator. To manage these risks, implement snubber circuits (RC networks) across the triac output or the load to absorb transient energy and limit the rate of voltage rise. Ensure the supply voltage is well within the 600V rating. Employing a metal oxide varistor (MOV) in parallel with the load can also provide additional protection against overvoltage transients.
Considering the S2S4 optoisolator's RoHS non-compliant status, what are the potential long-term supply chain and regulatory challenges for a design that uses it, and what proactive steps can be taken during the design phase to mitigate these?
The RoHS non-compliant status of the S2S4 optoisolator presents significant long-term supply chain and regulatory challenges. This means the component contains restricted substances, which may prevent its use in products destined for markets with strict environmental regulations. Supply chain risks include potential difficulty in sourcing the S2S4 in the future as manufacturers phase out non-compliant parts, and increased scrutiny from customs and regulatory bodies. To mitigate these, proactively identify and qualify compliant substitute components early in the design process. Document your reasons for considering the S2S4 (e.g., obsolescence of alternatives) and explore if a RoHS compliant alternative with similar electrical characteristics and form factor can be integrated. Planning for redesign with a compliant part should be a priority if global market access is a requirement.
If the S2S4 optoisolator's zero-crossing circuit is critical for my application's EMI reduction, what are the practical considerations for its sensitivity and potential limitations when driving loads with significant inrush current or non-linear characteristics?
The S2S4 optoisolator's zero-crossing circuit is designed to minimize electromagnetic interference (EMI) by switching the triac only when the voltage crosses zero. However, its sensitivity can be a concern with loads exhibiting high inrush current or non-linear behavior. High inrush current, such as from motor start-up or capacitive loads, can momentarily saturate the internal driver circuitry or overwhelm the optoisolator's ability to reliably detect the zero-crossing point, potentially leading to a premature or missed zero-crossing turn-on. Non-linear loads might present distorted waveforms, making accurate zero-crossing detection more difficult. To manage this, consider a snubber circuit on the load side to smooth out rapid voltage changes. If reliable zero-crossing is absolutely paramount for EMI reduction, and the S2S4 exhibits limitations with your specific load, you may need to explore optoisolators with more robust zero-crossing detection capabilities or external zero-crossing detection circuitry that drives a standard optoisolator.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
S2S4 CAD Models
Sharp Microelectronics S2S4 PCB symbols & footprints
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