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PC3SD21NXZCF
Sharp Microelectronics
OPTOISOLATOR 5KV TRIAC 6SMD
12825 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel 6-SMD
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Minimum 1
5.0 / 5.0
- (327 Ratings)
PC3SD21NXZCF
Product Overview
7929074
DiGi Electronics Part Number
PC3SD21NXZCF-DGManufacturer
Sharp Microelectronics
PC3SD21NXZCF
Description
OPTOISOLATOR 5KV TRIAC 6SMDInventory
12825 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel 6-SMD
Quantity
Minimum 1
Minimum 1
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PC3SD21NXZCF 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
5000Vrms
Voltage - Off State
600 V
Static dV/dt (Min)
1kV/µs
Current - LED Trigger (Ift) (Max)
5mA
Current - On State (It (RMS)) (Max)
100 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
6-SMD
Supplier Device Package
6-SMD
Approval Agency
CSA, UR
Base Product Number
PC3SD21
Datasheet & Documents
HTML Datasheet
PC3SD21NXZCF-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
425-2132-5
Standard Package
50
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Their support team is friendly, professional, and very helpful whenever we need assistance.
December 02, 2025
The product quality is excellent, and the price point is very attractive.
December 02, 2025
Their customer support team is highly responsive and always willing to troubleshoot issues promptly, ensuring minimal disruption to our workflow.
December 02, 2025
Always on time, DiGi Electronics is a reliable partner for our supply chain.
December 02, 2025
The website layout is intuitive, so I can find what I need quickly and easily.
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Frequently Asked Questions (FAQ)
Can the PC3SD21NXZCF be used in high-noise industrial environments without triggering false triac turn-on due to dV/dt transients?
Yes, the PC3SD21NXZCF is well-suited for noisy environments thanks to its high static dV/dt immunity of 1kV/µs (minimum), which helps prevent spurious triac triggering during voltage transients. However, in applications with rapid line-voltage spikes (e.g., motor loads or contactor switching), ensure proper PCB layout with minimized creepage and leakage paths, and consider adding a small RC snubber network across the triac output if unexpected turn-on occurs. The 5000Vrms isolation rating further enhances noise immunity in high-ground-shift environments.
Is there a recommended surface-mount PCB footprint or thermal pad design for reliable operation of the PC3SD21NXZCF under continuous 100mA RMS loads?
The PC3SD21NXZCF comes in a standard 6-SMD package without an exposed thermal pad, so heat dissipation relies on trace conduction. For reliable operation at up to 100mA RMS output current, use wide copper traces (≥0.5mm) on both output terminals and avoid tight trace bends to reduce current crowding. Place the device away from other heat-generating components and ensure adequate board ventilation. Although the device is rated for 100mA RMS, continuous operation near the limit in high ambient temperatures (>85°C) may require derating—monitor junction temperature during burn-in testing.
What are suitable long-term replacements for the obsolete PC3SD21NXZCF in solid-state relay (SSR) designs requiring zero-crossing detection and 5kV isolation?
Since the PC3SD21NXZCF is obsolete, viable drop-in replacements include the Vishay VO615A-3X (600V triac, zero-crossing, 5kVrms isolation) or the Lite-On LTV356A-TA1 (similar specs, SMD-6). Both offer compatible pinouts and comparable IFT (5mA max) and isolation ratings. However, verify timing parameters—some alternatives have slower turn-on times (>100µs). For improved availability, consider redesigning with AC-output optotriacs like the Toshiba TLP3525, which includes integrated zero-crossing and higher dV/dt immunity. Always confirm UL/CSA approvals for safety-critical applications.
How does the 3.5mA hold current (Ih) of the PC3SD21NXZCF impact its reliability when switching inductive loads such as solenoids or transformers?
The 3.5mA hold current means the load current must remain above this threshold to keep the output triac latched during each half-cycle. With inductive loads, current phase shift can cause premature triac commutation before the AC zero-crossing, leading to incomplete conduction or flickering. To ensure reliable operation with solenoids or low-power transformers drawing near or below 3.5mA RMS, add a passive bypass resistor (e.g., 10kΩ 1W) across the load to maintain minimum current. This prevents erratic switching and extends component life.
Can the PC3SD21NXZCF be safely used in a medical isolation barrier application requiring reinforced insulation, given its 5000Vrms rating and CSA/UR approvals?
While the PC3SD21NXZCF has a 5000Vrms isolation rating and CSA/UR certifications, it lacks specific medical safety certifications (e.g., IEC 60601-1) and is not listed as suitable for reinforced insulation in medical-grade systems. Additionally, its obsolete status increases supply chain and long-term reliability risks. For medical applications, use optoisolators specifically rated for medical isolation, such as the Broadcom ACPL-337J or Renesas RVSSS102A, which include full compliance documentation. The PC3SD21NXZCF is better suited for industrial controls where certification rigor is less strict.
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.
PC3SD21NXZCF CAD Models
Sharp Microelectronics PC3SD21NXZCF PCB symbols & footprints
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