Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
TLP785(GRH,F
Toshiba Semiconductor and Storage
PHOTOCOUPLER TRANS OUT
24003 Pcs New Original In Stock
Optoisolator Transistor Output 5000Vrms 1 Channel 4-DIP
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (97 Ratings)
TLP785(GRH,F
Product Overview
3802212
DiGi Electronics Part Number
TLP785(GRH,F-DGManufacturer
Toshiba Semiconductor and Storage
TLP785(GRH,F
Description
PHOTOCOUPLER TRANS OUTInventory
24003 Pcs New Original In Stock
Optoisolator Transistor Output 5000Vrms 1 Channel 4-DIP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
TLP785(GRH,F Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
-
Series
-
Product Status
Active
Number of Channels
1
Voltage - Isolation
5000Vrms
Current Transfer Ratio (Min)
150% @ 5mA
Current Transfer Ratio (Max)
300% @ 5mA
Turn On / Turn Off Time (Typ)
3µs, 3µs
Rise / Fall Time (Typ)
2µs, 3µs
Input Type
DC
Output Type
Transistor
Voltage - Output (Max)
80V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.15V
Current - DC Forward (If) (Max)
60 mA
Vce Saturation (Max)
400mV
Operating Temperature
-55°C ~ 110°C
Mounting Type
Through Hole
Package / Case
4-DIP (0.300", 7.62mm)
Supplier Device Package
4-DIP
Base Product Number
TLP785
Datasheet & Documents
Reliability Documents
TLP785(F) Reliability Test Reports
HTML Datasheet
TLP785(GRH,F-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
264-TLP785(GRHF
Standard Package
100
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
DiGi Electronics makes technology accessible through their excellent prices and welcoming staff.
Dec 02, 2025
Every interaction with diGi's support team has been positive and helpful.
Dec 02, 2025
Fast shipping and quick responses from after-sales make this a top choice for electronics.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
Can the TLP785(GRH,F) safely replace a PC817 in a 24V industrial control circuit without redesigning the input current-limiting resistor?
The TLP785(GRH,F) has a typical forward voltage (Vf) of 1.15V, slightly lower than the PC817’s ~1.2V, and a minimum CTR of 150% at 5mA—higher than the PC817’s 50–600% range (often 80% min at 5mA). However, due to its higher guaranteed CTR, the TLP785 may saturate the output transistor more easily, potentially causing slower turn-off in high-speed switching. If your existing PC817 circuit uses a resistor calculated for 5mA forward current, the TLP785 will likely still operate within spec, but verify that the output load does not exceed 50mA and that turn-off time (3µs typical) meets your timing requirements. For reliable replacement, re-calculate the input resistor using Vf = 1.15V and ensure the output stage can tolerate potentially higher leakage or slower edge rates under temperature extremes.
What are the risks of using the TLP785(GRH,F) in a high-temperature automotive under-hood application near its 110°C limit?
While the TLP785(GRH,F) is rated for operation up to 110°C, prolonged exposure near this limit significantly degrades LED efficiency and CTR over time due to accelerated aging of the internal photodiode and encapsulant. At 110°C, the forward current (If) must be derated—Toshiba recommends reducing If to ≤20mA above 85°C to maintain reliability. Additionally, moisture sensitivity level (MSL) 1 means no popcorning risk, but thermal cycling between -55°C and 110°C can stress the lead-frame bond wires. For automotive use, consider adding a small heatsink or spacing from heat sources, and avoid operating continuously above 100°C. If your design cannot guarantee thermal headroom, evaluate higher-reliability alternatives like the TLP785(F) with extended qualification or automotive-grade optocouplers such as the ACPL-217-500E.
How does the TLP785(GRH,F) compare to the LTV-817S for isolating a 10kHz PWM signal in a motor drive application?
The TLP785(GRH,F) offers faster typical turn-on/turn-off times (3µs each) and rise/fall times (2µs/3µs) compared to the LTV-817S (~4µs/4µs), making it better suited for 10kHz PWM where duty cycle accuracy matters. However, the LTV-817S has a wider CTR range and is often more consistent across batches, while the TLP785’s higher CTR (150–300% @ 5mA) can lead to deeper saturation, increasing stored charge and slightly delaying turn-off—especially at elevated temperatures. To mitigate this in your motor drive, use a Baker clamp or pull-down resistor on the output transistor base (if accessible via external circuitry) or ensure the load resistance keeps the output in the linear region. For precise 10kHz isolation, the TLP785 is preferable, but validate timing margins with worst-case CTR and temperature.
Is it safe to parallel two channels of TLP785(GRH,F) optoisolators to increase output current beyond 50mA in a relay driver circuit?
No—it is not recommended to parallel TLP785(GRH,F) outputs to exceed the 50mA per-channel rating. Although the devices are functionally identical, slight variations in CTR and Vce(sat) between units cause current imbalance, leading one transistor to carry disproportionately more load and risk thermal runaway. The TLP785 lacks built-in ballast resistors or current-sharing features. Instead, use a single TLP785 to drive a small NPN or MOSFET buffer stage (e.g., 2N3904 or 2N7000) to boost current to the relay coil. This approach maintains isolation integrity, protects the optocoupler, and improves reliability. Always ensure the buffer transistor’s base/gate drive is compatible with the TLP785’s 80V max output voltage and switching speed.
Can the TLP785(GRH,F) be used in a 48V telecom power supply feedback loop without violating isolation requirements?
Yes, but with critical layout and creepage considerations. The TLP785(GRH,F) provides 5000Vrms isolation, which meets basic telecom standards (e.g., IEC 60950-1), but the 4-DIP package has a narrow pin spacing (7.62mm), limiting creepage distance. In 48V systems with transient surges (e.g., lightning-induced), this may fall short of reinforced insulation requirements. To safely use it, maintain ≥8mm creepage on the PCB by adding slots or barriers between input and output sides, and avoid conformal coating that could trap contaminants. Also, ensure the output transistor’s 80V max rating accommodates feedback network voltages under fault conditions. For higher reliability in telecom, consider optocouplers in wider packages like the SO-5 or DIP-8 (e.g., TLP785F in 8-DIP) or reinforced isolators such as the HCPL-4506.
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.
TLP785(GRH,F CAD Models
Toshiba Semiconductor and Storage TLP785(GRH,F PCB symbols & footprints
productDetail
