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PC3H7D
Sharp Microelectronics
OPTOISO 2.5KV TRANS 4-MINI-FLAT
124502 Pcs New Original In Stock
Optoisolator Transistor Output 2500Vrms 1 Channel 4-Mini-Flat
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Minimum 1
Minimum 1
5.0 / 5.0
- (377 Ratings)
PC3H7D
Product Overview
7924711
DiGi Electronics Part Number
PC3H7D-DGManufacturer
Sharp Microelectronics
PC3H7D
Description
OPTOISO 2.5KV TRANS 4-MINI-FLATInventory
124502 Pcs New Original In Stock
Optoisolator Transistor Output 2500Vrms 1 Channel 4-Mini-Flat
Quantity
Minimum 1
Minimum 1
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PC3H7D Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Number of Channels
1
Voltage - Isolation
2500Vrms
Current Transfer Ratio (Min)
120% @ 1mA
Current Transfer Ratio (Max)
240% @ 1mA
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
4µs, 3µs
Input Type
DC
Output Type
Transistor
Voltage - Output (Max)
80V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
200mV
Operating Temperature
-30°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SOIC (0.173", 4.40mm Width)
Supplier Device Package
4-Mini-Flat
Datasheet & Documents
Datasheets
Download PC3H7D Product Specification (PDF)
HTML Datasheet
PC3H7D-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
425-1355-1
425-1355-2
Standard Package
3,000
Alternative Parts
PART 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 section de recherche avancée permet de filtrer rapidement les options, c'est très pratique.
December 02, 2025
La qualité du service chez DiGi Electronics est exceptionnelle, ils sont dignes de confiance et très amicaux.
December 02, 2025
L'expédition a été effectuée en un temps record, je n'ai jamais attendu longtemps avec DiGi Electronics.
December 02, 2025
Dependability and cost savings—DiGi Electronics nails both.
December 02, 2025
Their team consistently demonstrates expertise and a genuine desire to help.
December 02, 2025
I always appreciate the warm and helpful attitude of their staff.
December 02, 2025
Their logistics tracking is reliable and easy to monitor.
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Frequently Asked Questions (FAQ)
Can I use the PC3H7D optoisolator in a 24V industrial control circuit where ground potential differences exceed 2kV, and what are the risks of relying solely on its 2.5kVrms isolation rating?
While the PC3H7D provides a 2.5kVrms isolation rating, which exceeds typical 24V industrial ground bounce scenarios, you must consider transient overvoltages from inductive loads or lightning surges. The 2.5kV rating is for 1-minute withstand under test conditions—not continuous or repetitive transients. In high-noise environments, supplement the PC3H7D with external TVS diodes on both input and output sides and ensure adequate creepage distance (>5mm) on the PCB. Also verify that your system-level safety standards (e.g., IEC 61010 or UL 60950) don’t require higher isolation margins; otherwise, consider a reinforced isolator like the TCMT1108 with 5kVrms rating.
I’m replacing an obsolete PC3H7D in a legacy medical device design—can I safely substitute it with HMHA2801R2V without redesigning the feedback loop or output stage?
The HMHA2801R2V has a similar CTR (100–200% @ 5mA) and package (4-SOIC), but its CTR is specified at 5mA forward current versus the PC3H7D’s 1mA. This means your existing LED drive circuit may deliver insufficient If, leading to lower-than-expected CTR and potential logic-level mismatch. Re-evaluate your If under actual operating conditions—if it’s below 3mA, the HMHA2801R2V may not meet gain requirements. Additionally, the HMHA2801R2V has a slower rise time (~18µs vs. PC3H7D’s 4µs), which could affect timing in fast-switching feedback loops. Always validate signal integrity and noise margin in your specific application before finalizing the drop-in replacement.
What are the thermal and layout risks when using the PC3H7D in a densely populated SMD board operating near 100°C ambient, given its MSL-1 rating and SOIC package?
Although the PC3H7D is rated for -30°C to 105°C and has MSL-1 (unlimited floor life), sustained operation near 100°C reduces long-term reliability due to accelerated aging of the internal bond wires and encapsulation. The 4-Mini-Flat package has limited thermal dissipation—ensure the PCB layout includes thermal relief pads and avoids placing heat-generating components nearby. More critically, high ambient temperatures increase Vf drop and CTR degradation over time. Derate the forward current to ≤30mA at 100°C to avoid exceeding junction temperature limits. Also, verify solder joint integrity after reflow, as repeated thermal cycling can cause microcracks in the small-outline package, leading to premature failure.
Is the PC3H7D suitable for isolating a 50mA digital output driving a relay coil, and what precautions are needed to prevent output transistor saturation issues?
Yes, the PC3H7D can sink up to 50mA on its output transistor, making it viable for direct relay drive—but only if the relay coil voltage is ≤80V and the coil resistance ensures current stays within limit. However, the max Vce(sat) of 200mV assumes optimal conditions; in practice, at 50mA and high temperature, Vce(sat) may increase, reducing available voltage for the relay and risking chatter. Use a flyback diode across the relay coil to suppress back-EMF, which could otherwise stress the output transistor. For higher reliability, add a small base resistor (1–10kΩ) from output to ground to ensure fast turn-off and prevent leakage-induced false triggering. Consider buffering with a small MOSFET if switching speed or power efficiency is critical.
Why is the PC3H7D marked as obsolete, and what long-term supply chain risks should I consider if I’m designing a new product that depends on it despite its availability in stock?
Sharp Microelectronics has discontinued the PC3H7D, meaning no future production runs are planned—even though distributors may hold inventory. Relying on current stock (124k+ units) creates significant long-term risk: shortages will occur once inventory depletes, and counterfeit parts may flood the market. For new designs, avoid the PC3H7D entirely. Instead, migrate to a modern alternative like the TCMT1108 (Vishay) or HMHA281R2V, which offer better availability, improved CTR stability, and RoHS compliance. If you must use the PC3H7D for legacy compatibility, secure a lifetime buy with contractual guarantees and implement rigorous incoming inspection (X-ray, decapsulation) to detect counterfeits. Never assume future redesigns will be low-cost—pin-compatible doesn’t guarantee performance parity.
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.
PC3H7D CAD Models
Sharp Microelectronics PC3H7D PCB symbols & footprints
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