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PC4H520NIP
Sharp Microelectronics
OPTOISOLATOR 2.5KV DARL 4SMD
1989 Pcs New Original In Stock
Optoisolator Darlington Output 2500Vrms 1 Channel 4-Mini-Flat
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5.0 / 5.0
- (177 Ratings)
PC4H520NIP
Product Overview
7929465
DiGi Electronics Part Number
PC4H520NIP-DGManufacturer
Sharp Microelectronics
PC4H520NIP
Description
OPTOISOLATOR 2.5KV DARL 4SMDInventory
1989 Pcs New Original In Stock
Optoisolator Darlington Output 2500Vrms 1 Channel 4-Mini-Flat
Quantity
Minimum 1
Minimum 1
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PC4H520NIP Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Number of Channels
1
Voltage - Isolation
2500Vrms
Current Transfer Ratio (Min)
1000% @ 1mA
Current Transfer Ratio (Max)
-
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
100µs, 20µs
Input Type
DC
Output Type
Darlington
Voltage - Output (Max)
350V
Current - Output / Channel
120mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
1.4V
Operating Temperature
-40°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SOIC (0.173", 4.40mm Width)
Supplier Device Package
4-Mini-Flat
Datasheet & Documents
HTML Datasheet
PC4H520NIP-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
425-1379-2
425-1379-1
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
Je suis impressionné par leur rapidité de livraison et la qualité de leur support.
December 02, 2025
Their tracking system allows for easy rescheduling or rerouting if needed.
December 02, 2025
Their support team is knowledgeable and responsive.
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Frequently Asked Questions (FAQ)
Can the PC4H520NIP optoisolator be safely replaced with a TCMD1000 in a high-noise industrial control circuit without redesigning the PCB layout?
While the TCMD1000 offers similar isolation voltage (2500Vrms) and Darlington output configuration, it has a lower current transfer ratio (CTR) of 500% at 5mA compared to the PC4H520NIP’s 1000% at 1mA, which may reduce signal integrity in low-drive applications. Additionally, the TCMD1000 uses a different package (4-SOP vs. 4-Mini-Flat), so direct drop-in replacement is not feasible without footprint modification. For noise-sensitive designs, verify that the slower rise/fall times of the PC4H520NIP (100µs/20µs) are acceptable, as faster alternatives could introduce unintended switching transients. Always validate CTR margin under actual load conditions to avoid marginal operation.
What are the key reliability risks when using the PC4H520NIP in a 24V automotive environment with frequent load dump transients?
The PC4H520NIP has a maximum output voltage rating of 350V and 120mA per channel, which is sufficient for 24V systems, but automotive load dumps can exceed 100V spikes. Without proper external clamping (e.g., TVS diodes), repeated transients may degrade the output transistor over time. Also, although its operating temperature range (-40°C to 100°C) meets automotive requirements, the Darlington output’s Vce(sat) of 1.4V leads to higher power dissipation under continuous load—monitor thermal derating near 100°C. Since the part is obsolete and RoHS non-compliant, long-term supply risk and potential counterfeit exposure further complicate lifecycle reliability.
How does the PC4H520NIP compare to the PS2833-1-F3-A for isolating a microcontroller GPIO in a medical device requiring IEC 60601-1 compliance?
The PS2833-1-F3-A is a better fit for medical applications due to its reinforced insulation certification and higher creepage/clearance in the 4-SOP package, which simplifies compliance with IEC 60601-1. In contrast, the PC4H520NIP lacks medical-grade certification and has a lower isolation voltage (2500Vrms vs. 3750Vrms for reinforced insulation). While both use Darlington outputs, the PS2833-1-F3-A also offers better CTR stability over temperature. Given that the PC4H520NIP is obsolete and non-RoHS, sourcing compliant replacements for regulated markets becomes a significant design risk—making the PS2833-1-F3-A a more sustainable choice despite minor layout adjustments.
Is it safe to drive the PC4H520NIP input directly from a 3.3V microcontroller GPIO without a series resistor, given its 1.2V forward voltage?
No—direct connection risks exceeding the PC4H520NIP’s maximum forward current (50mA). A 3.3V GPIO can source 20–40mA depending on the MCU, and without current limiting, the LED may draw excessive current during transients or due to process variation, leading to premature failure. Always include a series resistor (e.g., ~100Ω for ~20mA at 3.3V) to ensure If stays within spec. Also, consider that lower If reduces CTR; since the PC4H520NIP’s CTR is specified at 1mA, verify output saturation under your actual If to avoid marginal switching, especially in feedback loops or safety-critical isolation paths.
Can the PC4H520NIP handle inductive load switching at 120mA without a flyback diode, and what failure modes should I anticipate?
Switching inductive loads (e.g., relays, solenoids) at 120mA without a flyback diode risks catastrophic failure due to voltage spikes exceeding the 350V output rating. The PC4H520NIP’s Darlington output lacks internal protection, so back-EMF from inductive kick can avalanche the output transistor, causing latent or immediate damage. Always include a reverse-biased flyback diode across the load. Additionally, the high Vce(sat) of 1.4V increases power dissipation during conduction—combine this with inductive turn-off stress, and thermal runaway becomes a concern in enclosed environments. Given the part’s obsolete status, consider migrating to a modern optoisolator with built-in output protection or external snubber support for robust inductive switching.
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PC4H520NIP CAD Models
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