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PC4SD21NTZCF
Sharp Microelectronics
OPTOISOLATOR 5KV TRIAC 6DIP
1399 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel 6-DIP
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Minimum 1
Minimum 1
5.0 / 5.0
- (408 Ratings)
PC4SD21NTZCF
Product Overview
7929348
DiGi Electronics Part Number
PC4SD21NTZCF-DGManufacturer
Sharp Microelectronics
PC4SD21NTZCF
Description
OPTOISOLATOR 5KV TRIAC 6DIPInventory
1399 Pcs New Original In Stock
Optoisolator Triac Output 5000Vrms 1 Channel 6-DIP
Quantity
Minimum 1
Minimum 1
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PC4SD21NTZCF Technical Specifications
Category
Optoisolators, Triac, SCR Output Optoisolators
Packaging
-
Series
-
Product Status
Discontinued at Digi-Key
Output Type
Triac
Zero Crossing Circuit
Yes
Number of Channels
1
Voltage - Isolation
5000Vrms
Voltage - Off State
800 V
Static dV/dt (Min)
500V/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
Through Hole
Package / Case
6-DIP (0.300", 7.62mm), 5 Leads
Supplier Device Package
6-DIP
Approval Agency
CSA, UR
Base Product Number
PC4SD21
Datasheet & Documents
HTML Datasheet
PC4SD21NTZCF-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
425-2151-5
Standard Package
50
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
The website's clarity and simplicity made the entire shopping process stress-free.
December 02, 2025
Great value, great packaging—DiGi Electronics is always my first choice.
December 02, 2025
Their quick turnaround times make problem-solving seamless.
December 02, 2025
The affordability of their products is matched by their consistent performance over time.
December 02, 2025
Switching to DiGi Electronics is easy knowing their packaging is environmentally responsible.
December 02, 2025
They provide timely advice and tips post-purchase, enhancing my confidence and satisfaction.
December 02, 2025
Our experience with DiGi Electronics' after-sales support has been excellent. They follow up to ensure issues are fully resolved, demonstrating genuine care.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the PC4SD21NTZCF in high-temperature industrial environments near its 100°C operating limit?
The PC4SD21NTZCF is rated for operation up to 100°C, but sustained operation near this limit can accelerate LED degradation in the input side and reduce triac output lifetime due to thermal stress on internal bonds. To mitigate risk, maintain PCB copper pour under the device for heat dissipation, avoid adjacent high-power components, and derate the forward current (If) by at least 20% above 85°C. Consider thermal cycling testing if your application experiences frequent temperature swings, as repeated expansion/contraction may compromise the 6-DIP package integrity over time.
Can the PC4SD21NTZCF safely replace a MOC3041 in a 240VAC motor control circuit, and what design changes are needed?
While both are zero-crossing optoisolators with 5kV isolation, the PC4SD21NTZCF has a higher off-state voltage (800V vs. 600V) and lower hold current (3.5mA vs. 5mA), making it electrically suitable for 240VAC applications. However, the MOC3041 includes built-in snubber networks, whereas the PC4SD21NTZCF does not—you must add an external RC snubber (e.g., 100Ω + 0.1µF, rated for ≥400V) across the triac output to suppress dV/dt-induced false triggering. Also verify that your gate drive circuitry can supply sufficient trigger current, as the PC4SD21NTZCF’s maximum Ift is 5mA, which is adequate but tighter than some alternatives.
How does the static dV/dt rating of 500V/µs in the PC4SD21NTZCF impact noise immunity in noisy power line environments, and when might it cause unintended triggering?
The PC4SD21NTZCF’s 500V/µs static dV/dt rating means it can withstand rapid voltage transients without latching prematurely—critical in inductive load switching or lightning-surge-prone grids. However, in environments with frequent high-energy spikes (e.g., near large motors or relays), this threshold may be exceeded, causing false turn-ons even with zero-crossing detection. To prevent this, always use a properly tuned RC snubber and ensure minimal loop area in the triac gate wiring. If your system experiences >400V/µs transients regularly, consider reinforcing protection with a TVS diode or upgrading to a higher dV/dt-rated isolator like the Vishay VO3063 (1000V/µs).
Is the PC4SD21NTZCF a viable drop-in replacement for the discontinued Fairchild FOD4178 in a 120VAC lighting dimmer, considering package and performance differences?
The PC4SD21NTZCF is not a direct drop-in due to differing pinouts and electrical characteristics. The FOD4178 uses a 4-pin DIP with higher hold current (10mA), while the PC4SD21NTZCF is a 6-DIP with 3.5mA hold current—this lower Ih improves compatibility with low-power loads but may cause issues with very small leakage currents in some TRIAC-based dimmers. You’ll need to re-layout the PCB to accommodate the 6-DIP footprint and verify that your load remains above the hold current under all conditions. Additionally, confirm that your microcontroller or driver can source ≤5mA to meet the PC4SD21NTZCF’s Ift requirement, as some older designs assume higher trigger currents.
Given that the PC4SD21NTZCF is discontinued at major distributors, what long-term sourcing and qualification strategies should I adopt for volume production?
Since the PC4SD21NTZCF is listed as discontinued at Digi-Key and carries MSL 1 (unlimited floor life), immediate bulk procurement from authorized stockists like Mouser or Arrow is advisable to secure inventory. However, for long-term designs, initiate a second-source qualification with functionally equivalent parts such as the Lite-On LTV-4N41 or Toshiba TLP7629—both offer 5kV isolation, zero-crossing, and similar current ratings. Perform comparative testing under worst-case conditions (high temp, low load, surge events) to validate interchangeability. Document any required firmware or snubber adjustments, and consider adding the PC4SD21NTZCF to a ‘last-time buy’ agreement with Sharp or an authorized broker to cover projected demand through end-of-life.
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.
PC4SD21NTZCF CAD Models
Sharp Microelectronics PC4SD21NTZCF PCB symbols & footprints
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