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PC733
Sharp Microelectronics
OPTOISO 5KV TRANS W/BASE 6DIP
40603 Pcs New Original In Stock
Optoisolator Transistor with Base Output 5000Vrms 1 Channel 6-DIP
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (489 Ratings)
PC733
Product Overview
7924821
DiGi Electronics Part Number
PC733-DGManufacturer
Sharp Microelectronics
PC733
Description
OPTOISO 5KV TRANS W/BASE 6DIPInventory
40603 Pcs New Original In Stock
Optoisolator Transistor with Base Output 5000Vrms 1 Channel 6-DIP
Quantity
Minimum 1
Minimum 1
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PC733 Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Number of Channels
1
Voltage - Isolation
5000Vrms
Current Transfer Ratio (Min)
15% @ 1mA
Current Transfer Ratio (Max)
300% @ 1mA
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
4µs, 3µs
Input Type
AC, DC
Output Type
Transistor with Base
Voltage - Output (Max)
35V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
200mV
Operating Temperature
-25°C ~ 100°C
Mounting Type
Through Hole
Package / Case
6-DIP (0.300", 7.62mm)
Supplier Device Package
6-DIP
Datasheet & Documents
Datasheets
Download PC733 Product Specification (PDF)
HTML Datasheet
PC733-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
425-1431-5
Standard Package
50
Alternative Parts
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
쉽게 찾을 수 있고, 가격도 경쟁력이 있어서 꼭 추천하고 싶어요.
December 02, 2025
DiGi Electronics provides dependable products that don't break the bank.
December 02, 2025
The shipping was unbelievably fast, I received my order the very next day, which exceeded my expectations.
December 02, 2025
Every interaction with their customer service team was positive and solution-oriented.
December 02, 2025
Speedy delivery and sturdy packaging made the process smooth.
December 02, 2025
Their website provides detailed FAQs and live chat options, making post-purchase support very accessible.
December 02, 2025
Fast shipping meant I could enjoy my purchase sooner than I thought.
December 02, 2025
Their reliable after-sales service gives me peace of mind after purchasing.
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Frequently Asked Questions (FAQ)
Can I use the PC733 optoisolator in a 48V industrial control system where ground potential differences exceed 3kV, and what are the risks of relying solely on its 5kVrms isolation rating?
While the PC733 offers a 5kVrms isolation voltage, this rating is typically a one-minute withstand test and does not guarantee continuous safe operation under sustained high-voltage transients or long-term creepage stress. In a 48V system with ground potential differences exceeding 3kV, repeated surges or partial discharge can degrade the internal insulation over time, especially in humid or contaminated environments. For such applications, consider reinforcing isolation with external protection (e.g., TVS diodes) and verify that your PCB layout maintains adequate creepage distance (>8mm for 3kV). If system-level safety standards like IEC 61010 or IEC 62368 apply, the PC733 may not meet reinforced isolation requirements—evaluate alternatives like the TLP785 or ACPL-M71T with higher certification margins.
I'm replacing a failed PC733 in a legacy motor drive interface; can I substitute it with an LTV-733 or H11AA1 without redesigning the surrounding circuitry?
The LTV-733 is a direct functional and pin-compatible replacement for the PC733 and can typically be swapped without circuit changes, as it shares similar CTR (15–300%), Vf (~1.2V), and output characteristics. However, the H11AA1 has a Darlington output configuration, which increases current transfer ratio but slows down switching speed significantly—its turn-off time can be 10x longer than the PC733’s 3µs fall time. This may cause timing errors in high-frequency PWM or fast fault-detection circuits. Always verify switching performance in your actual load condition; if speed is critical, avoid the H11AA1 and consider faster substitutes like the 6N137 (though it requires different biasing).
The PC733 is marked obsolete—what are the long-term reliability risks of continuing to use it in new designs, and how does its non-RoHS status impact manufacturing?
Using the PC733 in new designs poses significant supply chain and compliance risks. As an obsolete, non-RoHS component, it may be discontinued without notice, leading to last-time buys or counterfeit parts. Non-RoHS status (likely due to leaded solder) prevents use in EU-regulated products and complicates assembly on modern lead-free lines, requiring segregated processes. Additionally, long-term reliability data is no longer updated, so field failure rates under thermal cycling or humidity may be unknown. For new designs, migrate to RoHS-compliant, actively supported alternatives like the Sharp PC817 (for lower speed) or Vishay VO615A, which offer similar performance with full lifecycle support and compliance documentation.
My design uses the PC733 to isolate a microcontroller GPIO from a relay driver; the output transistor keeps saturating too slowly—could the base pin be causing this, and how should I optimize the pull-down?
Yes, the base pin on the PC733’s phototransistor output can cause slow turn-off due to stored charge, especially if left floating or weakly pulled down. Unlike optoisolators without a base connection, the exposed base allows you to accelerate discharge by adding a pull-down resistor (typically 10kΩ to 100kΩ) between base and emitter. This reduces fall time significantly—empirical tests show improvements from 3µs to under 1µs in some loads. However, excessive pull-down current can reduce effective CTR, so balance speed against signal integrity. Also ensure your load resistor on the collector isn’t too large, as high impedance increases RC time constants. For faster response, consider a logic-output optocoupler like the HCPL-2630, but only if your design can accommodate its higher input current and different interface.
Can the PC733 handle AC input signals directly, and what precautions are needed to prevent LED degradation when switching 120VAC zero-crossing detection circuits?
The PC733 accepts AC input signals, but connecting it directly to 120VAC without current limiting will destroy the internal LED. Always use a series resistor to limit peak forward current to below 50mA—for 120VAC, a 2.2kΩ, 1W resistor limits current to ~38mA peak. Additionally, include a reverse-parallel diode (e.g., 1N4148) across the LED to clamp reverse voltage, since the PC733’s LED isn’t rated for high reverse bias. Without this, negative half-cycles can cause junction breakdown and premature failure. For improved longevity in zero-crossing applications, consider using a bridge rectifier configuration or switching to an optoisolator with integrated input protection like the Fairchild MID400, which simplifies AC interfacing and enhances reliability over the PC733 in harsh line conditions.
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.
PC733 CAD Models
Sharp Microelectronics PC733 PCB symbols & footprints
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