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IS204
Isocom Components 2004 LTD
6PIN HIGH DENSITY TRANSISTOR DET
5955 Pcs New Original In Stock
Optoisolator Transistor Output 7.5Vpk 1 Channel 6-DIP
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5.0 / 5.0
- (287 Ratings)
IS204
Product Overview
1911294
DiGi Electronics Part Number
IS204-DGManufacturer
Isocom Components 2004 LTD
IS204
Description
6PIN HIGH DENSITY TRANSISTOR DETInventory
5955 Pcs New Original In Stock
Optoisolator Transistor Output 7.5Vpk 1 Channel 6-DIP
Quantity
Minimum 1
Minimum 1
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IS204 Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
Tube
Series
IS20
Product Status
Active
Number of Channels
1
Voltage - Isolation
7.5Vpk
Current Transfer Ratio (Min)
200% @ 10mA
Current Transfer Ratio (Max)
400% @ 10mA
Turn On / Turn Off Time (Typ)
3µs, 2.5µs
Rise / Fall Time (Typ)
-
Input Type
DC
Output Type
Transistor
Voltage - Output (Max)
70V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
400mV
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 IS204 Product Specification (PDF)
HTML Datasheet
IS204-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
58-IS204
56-IS204
56-IS204-DG
Standard Package
65
Alternative Parts
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Product categories are well-organized, helping me locate items efficiently.
грудня 02, 2025
Impressed by how well the product holds up under constant handling and stress.
грудня 02, 2025
Order processing was rapid, and the packaging was top-notch.
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Frequently Asked Questions (FAQ)
Can the IS204 optoisolator safely replace a TLP521-1 in a 24V industrial input circuit without risking premature failure due to voltage stress?
The IS204 has a maximum output voltage rating of 70V and an isolation voltage of 7.5Vpk (not RMS), which is significantly lower than the TLP521-1’s 5,000Vrms isolation. While the IS204 can handle the 24V logic side, its 7.5Vpk isolation makes it unsuitable for high-voltage industrial environments where surge immunity or safety isolation above ~5V is required. Replacing the TLP521-1 with the IS204 in such applications introduces a critical reliability risk—insufficient galvanic isolation—potentially leading to system damage or safety hazards. Use the IS204 only in low-voltage, non-safety-critical signal isolation roles.
What are the risks of using the IS204 in high-temperature environments near its 100°C limit, especially when driving inductive loads?
Operating the IS204 near its 100°C maximum junction temperature significantly reduces its current transfer ratio (CTR) and increases Vce(sat), which can lead to thermal runaway when driving inductive loads that require higher peak currents. The CTR degrades over time at elevated temperatures, potentially causing the output transistor to fail to fully saturate, increasing power dissipation. To mitigate this, derate the output current by at least 30% above 85°C and ensure adequate PCB copper area for heat dissipation. Avoid using the IS204 in thermally constrained enclosures without thermal modeling.
How does the IS204 compare to the LTV-817S for low-speed digital signal isolation in terms of long-term CTR stability and replacement compatibility?
While both the IS204 and LTV-817S offer similar forward current (50mA max) and output voltage (70V), the IS204 has a higher minimum CTR (200% vs. 50% for LTV-817S at 10mA), making it more suitable for low-input-current applications. However, the LTV-817S typically exhibits better long-term CTR stability due to superior aging characteristics in its LED-phototransistor pair. If replacing an LTV-817S with the IS204, verify that the input drive current is sufficient to maintain CTR over the product’s lifetime—especially in high-temperature operation—as the IS204’s CTR can degrade faster under stress, risking marginal logic-high levels in the output stage.
Is the IS204 suitable for isolating PWM signals at 50kHz in motor control applications, given its 3µs turn-on and 2.5µs turn-off times?
The IS204’s typical switching times (3µs on, 2.5µs off) result in a total transition time of ~5.5µs, which consumes 27.5% of a 20µs PWM period (50kHz), leading to significant duty cycle distortion and potential control instability in precision motor drives. While technically functional, this introduces non-linear timing errors that may require software compensation. For reliable 50kHz PWM isolation, consider faster alternatives like the HCPL-817 or 6N137 (with logic output). The IS204 is better suited for signal isolation below 10kHz where propagation delay and edge distortion are less critical.
Can I parallel two IS204 channels to increase output current capability, and what are the reliability risks?
The IS204 is a single-channel device, so paralleling isn't possible within one package, but even if using multiple IS204 units, paralleling outputs is not recommended due to mismatched CTR and Vce(sat) between units. This leads to unequal current sharing, where one transistor may carry most of the load, increasing localized heating and accelerating failure. Instead of paralleling, use a dedicated Darlington-output optoisolator like the 4N35 or add an external buffer transistor driven by a single IS204. This approach ensures reliable current handling without compromising isolation or introducing thermal imbalance risks.
Quality Assurance (QC)
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IS204 CAD Models
Isocom Components 2004 LTD IS204 PCB symbols & footprints
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