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PC451TJ0000F
Sharp Microelectronics
OPTOISOLATOR 3.75KV TRANS 4SMD
2374 Pcs New Original In Stock
Optoisolator Transistor Output 3750Vrms 1 Channel
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5.0 / 5.0
- (188 Ratings)
PC451TJ0000F
Product Overview
7928281
DiGi Electronics Part Number
PC451TJ0000F-DGManufacturer
Sharp Microelectronics
PC451TJ0000F
Description
OPTOISOLATOR 3.75KV TRANS 4SMDInventory
2374 Pcs New Original In Stock
Optoisolator Transistor Output 3750Vrms 1 Channel
Quantity
Minimum 1
Minimum 1
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PC451TJ0000F Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
-
Series
-
Product Status
Obsolete
Number of Channels
1
Voltage - Isolation
3750Vrms
Current Transfer Ratio (Min)
40% @ 5mA
Current Transfer Ratio (Max)
-
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
4µs, 5µs
Input Type
DC
Output Type
Transistor
Voltage - Output (Max)
350V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
300mV
Operating Temperature
-25°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SMD, Gull Wing
Datasheet & Documents
HTML Datasheet
PC451TJ0000F-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Standard Package
750
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 très satisfait de la qualité de l’emballage qui protège efficacement contre tous types de dommages.
December 02, 2025
Fast delivery combined with excellent packaging made for a stress-free shopping process.
December 02, 2025
Having reliable stock levels and support makes our procurement process very efficient.
December 02, 2025
Speedy delivery exceeded my expectations, and the packaging was top-notch.
December 02, 2025
Their logistics process is well-organized and transparent.
December 02, 2025
Impressed by how quickly DiGi Electronics shipped my order—truly reliable.
December 02, 2025
The durability and price point of DiGi Electronics' products make them ideal for everyday gamers.
December 02, 2025
We appreciate their commitment to ensuring our satisfaction with their service.
December 02, 2025
DiGi Electronics consistently ensures timely shipments, demonstrating their commitment to customer satisfaction.
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Frequently Asked Questions (FAQ)
Can I safely replace the obsolete PC451TJ0000F optoisolator in my industrial control board with the HCPL-181-00CE, and what design risks should I evaluate before doing so?
Replacing the PC451TJ0000F with the HCPL-181-00CE is technically feasible but requires careful evaluation of pinout compatibility, isolation voltage derating under pollution degree 2 conditions, and CTR (Current Transfer Ratio) matching at your operating current. The HCPL-181-00CE has a higher typical CTR (50% vs. 40% @ 5mA), which may improve noise margin, but its lower Vce(sat) of 0.4V (vs. 0.3V max for PC451TJ0000F) could marginally increase power dissipation in high-side switching. Verify PCB footprint alignment—both are 4-SMD gull wing—and confirm that the HCPL-181-00CE’s 5000Vrms isolation exceeds your system’s transient overvoltage requirements. Always validate signal integrity under worst-case temperature (-25°C) due to CTR roll-off in optocouplers.
What are the key reliability concerns when using the PC451TJ0000F in a high-humidity environment near its 100°C upper operating limit, and how does MSL 1 rating impact long-term performance?
Although the PC451TJ0000F carries an MSL 1 (unlimited floor life) rating, prolonged exposure to high humidity combined with operation near 100°C accelerates degradation of the internal LED and phototransistor due to moisture ingress through the package mold compound. This can lead to reduced CTR over time and increased dark current, potentially causing false triggering or loss of isolation integrity. To mitigate risk, ensure conformal coating is applied if the assembly operates in humid or condensing environments, and avoid sustained operation above 85°C unless derating curves from Sharp (or substitute vendors) confirm stability. Thermal cycling between -25°C and 100°C may also induce mechanical stress at the die-attach interface, so consider underfill if vibration is present.
How does the PC451TJ0000F’s 3750Vrms isolation voltage compare to modern substitutes like the FODM2701R2 in terms of creepage, clearance, and suitability for 240VAC mains sensing applications?
The PC451TJ0000F’s 3750Vrms isolation is sufficient for basic 240VAC mains sensing under IEC 61010-1 (pollution degree 2), but it provides minimal safety margin for transient overvoltages (e.g., 6kV surges). In contrast, the FODM2701R2 offers 5000Vrms isolation and better-defined creepage/clearance in its 4-SMD package, making it more robust for reinforced isolation in new designs. However, the FODM2701R2 has a lower max output voltage (80V vs. 350V for PC451TJ0000F), so it cannot directly replace the PC451TJ0000F in high-voltage switching nodes (>80V). If your application involves direct feedback from a 240VAC rectified bus (>340VDC), the PC451TJ0000F’s 350V output rating may still be necessary—but consider adding external clamping to protect against voltage spikes.
What input current and drive circuitry are needed to ensure reliable switching of the PC451TJ0000F in a low-power microcontroller interface, and how does CTR variation affect design margin?
To guarantee reliable turn-on of the PC451TJ0000F with its minimum CTR of 40% @ 5mA, drive the input LED with at least 5mA forward current (If) when the output must sink 2mA or more. For microcontroller GPIOs (typically 4–8mA source/sink capability), use a series resistor to limit If to 5–10mA (e.g., 330Ω with 3.3V logic: (3.3V – 1.2V)/5mA ≈ 420Ω → use 390Ω). Account for CTR degradation over temperature and lifetime—design for worst-case CTR of 25% at end-of-life and high temperature. If your load requires >20mA output current, add a buffer transistor stage, as exceeding 50mA channel current risks thermal runaway. Always test marginal conditions (cold start at -25°C) where CTR drops significantly.
Is the PC451TJ0000F suitable for replacing a failed LTV-358T in a motor drive feedback circuit, and what layout considerations are critical to maintain signal integrity?
The PC451TJ0000F can replace the LTV-358T in motor drive feedback if the circuit operates within the PC451TJ0000F’s 50mA output current and 350V output voltage limits. However, the LTV-358T has a faster typical rise/fall time (1µs vs. 4µs/5µs for PC451TJ0000F), so verify that the slower edge rates don’t cause timing errors in your PWM or fault detection logic. Critical layout practices include: maintaining ≥8mm creepage distance between input and output traces on the PCB, avoiding parallel high-dV/dt traces near the optocoupler, and placing a 100nF decoupling cap near the output side if powering a local load. Also, ensure the ground planes on input and output sides are fully isolated—no shared vias or copper pours—to preserve the 3750Vrms isolation barrier.
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.
PC451TJ0000F CAD Models
Sharp Microelectronics PC451TJ0000F PCB symbols & footprints
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