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S21ME5PY
Sharp Microelectronics
OPTOISOLATOR 5KV TRIAC 4SMD
3327 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel
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5.0 / 5.0
- (394 Ratings)
S21ME5PY
Product Overview
5824955
DiGi Electronics Part Number
S21ME5PY-DGManufacturer
Sharp Microelectronics
S21ME5PY
Description
OPTOISOLATOR 5KV TRIAC 4SMDInventory
3327 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
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365 - Day Quality Guarantee - Every part fully backed.
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S21ME5PY Technical Specifications
Category
Optoisolators, Triac, SCR Output Optoisolators
Packaging
Cut Tape (CT)
Series
-
Product Status
Obsolete
Output Type
Triac
Zero Crossing Circuit
Yes
Number of Channels
1
Voltage - Isolation
5000Vrms
Voltage - Off State
600 V
Static dV/dt (Min)
100V/µs
Current - LED Trigger (Ift) (Max)
10mA
Current - On State (It (RMS)) (Max)
100 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
Through Hole
Approval Agency
BSI, DEMKO, SEMKO, UR, VDE
Base Product Number
S21M
Datasheet & Documents
HTML Datasheet
S21ME5PY-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
425-1381-1
425-1381-2
425-S21ME5PYTR
Standard Package
2,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Les prix chez DiGi Electronics sont très raisonnables, et leur service client est toujours à l’écoute.
December 02, 2025
Excellent price advantages that help me stay within my budget while upgrading my devices.
December 02, 2025
Their professionalism makes resolving issues quick and easy.
December 02, 2025
I respect their dedication to reducing environmental impact through thoughtful packaging.
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Frequently Asked Questions (FAQ)
Can the S21ME5PY be used as a direct replacement for the MOC3041M in a 220V AC load switching application, and what are the key design-in risks?
The S21ME5PY can serve as a functional replacement for the MOC3041M in 220V AC switching applications due to its 600V off-state voltage and integrated zero-crossing detection, which reduces EMI in resistive loads. However, a critical design-in risk is that the S21ME5PY is marked as obsolete, making long-term supply unreliable. Additionally, while both optoisolators trigger at or below 10mA, the S21ME5PY has a lower maximum RMS on-state current (100mA vs. MOC3041M’s typical 150mA), limiting its use in higher-power loads without an external triac buffer. Always verify timing—S21ME5PY has a 100µs max turn-on time—which may affect phase-sensitive control. Ensure your PCB layout accommodates the S21ME5PY's through-hole mounting, as MOC3041M variants may be surface-mount.
How does the S21ME5PY's zero-crossing circuit impact performance in non-resistive (inductive) load applications, and what mitigation strategies should designers consider?
In inductive load applications (e.g., motors or solenoids), the S21ME5PY’s built-in zero-crossing detection can cause erratic switching due to phase shifts between voltage and current, leading to partial conduction cycles or relay chattering. Although zero-crossing reduces EMI in resistive loads, it increases stress in inductive circuits. Designers should use the S21ME5PY only with snubber networks (RC circuit in parallel with the triac) to suppress voltage transients and prevent false triggering. Alternatively, consider non-zero-crossing optoisolators like the S217S02 for better control in phase-dependent switching. Always verify load characteristics during prototyping to avoid premature triac failure.
What are the reliability risks of using S21ME5PY in industrial environments operating near 100°C ambient temperature?
While the S21ME5PY is rated for operation up to 100°C, sustained use at maximum ambient temperature increases thermal stress on both the internal LED and output triac, accelerating LED output degradation and potentially increasing forward voltage drop over time. This can lead to failed triggering if the LED drive circuit operates near the minimum required If. To mitigate, derate the LED current by 20-30% below the 50mA max, use a current-regulated drive (not resistor-limited), and ensure adequate PCB thermal dissipation. Additionally, confirm that the triac’s 100mA RMS limit includes derating—at elevated temps, thermal runaway can occur without proper heat sinking. Monitor Ih (3.5mA) dependency on temperature in latching circuits.
Is the S21ME5PY suitable for medical equipment requiring 5kV isolation, and does its RoHS non-compliance create certification barriers?
The S21ME5PY provides 5000Vrms isolation, which meets or exceeds safety requirements for many medical-grade isolated controls (e.g., IEC 60601-1 basic insulation). However, its RoHS non-compliance presents a significant certification risk—most medical and industrial standards now mandate RoHS conformity. Use in medical or EU-sold equipment could lead to non-compliance with CE, UKCA, or FDA regulations. Even if technically functional, the lack of RoHS compliance limits traceability and end-product marketability. For replacement, consider RoHS-compliant alternatives like the LIT-220-BLAZAR or IL4106-X009, which offer similar triac output and isolation with updated environmental compliance.
How does the S21ME5PY's static dV/dt rating of 100V/µs affect its reliability in high-noise industrial environments, and how can false triggering be prevented?
The S21ME5PY's minimum static dV/dt rating of 100V/µs means rapid voltage transients (e.g., from relay switching or motor loads) can inadvertently trigger the output triac, causing false turn-on and system malfunction. In high-noise environments, this poses a significant reliability risk. To prevent false triggering, add an RC snubber network (e.g., 100Ω + 10nF) across the triac output to dampen voltage spikes. Also, ensure the LED side is driven with clean, filtered logic signals and consider using a series resistor to stabilize If. Avoid routing sensitive input traces near AC lines. For harsher EMI environments, consider optoisolators with higher dV/dt ratings, such as the VOM3250T (1500V/µs), though these lack zero-crossing and require additional control circuitry.
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.
S21ME5PY CAD Models
Sharp Microelectronics S21ME5PY PCB symbols & footprints
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