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ISP815XSM
Isocom Components 2004 LTD
4PIN DARLINGTON, SINGLE OPTOCOUP
3345 Pcs New Original In Stock
Optoisolator Darlington Output 5300Vrms 1 Channel 4-SMD
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5.0 / 5.0
- (134 Ratings)
ISP815XSM
Product Overview
1908234
DiGi Electronics Part Number
ISP815XSM-DGManufacturer
Isocom Components 2004 LTD
ISP815XSM
Description
4PIN DARLINGTON, SINGLE OPTOCOUPInventory
3345 Pcs New Original In Stock
Optoisolator Darlington Output 5300Vrms 1 Channel 4-SMD
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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365 - Day Quality Guarantee - Every part fully backed.
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ISP815XSM Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
Tube
Series
ISP815
Product Status
Active
Number of Channels
1
Voltage - Isolation
5300Vrms
Current Transfer Ratio (Min)
60% @ 1mA
Current Transfer Ratio (Max)
7500% @ 1mA
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
60µs, 53µs
Input Type
DC
Output Type
Darlington
Voltage - Output (Max)
35V
Current - Output / Channel
80mA
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
1V
Operating Temperature
-30°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SMD, Gull Wing
Supplier Device Package
4-SMD
Datasheet & Documents
HTML Datasheet
ISP815XSM-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
56-ISP815XSM
56-ISP815XSM-DG
58-ISP815XSM
Standard Package
100
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Des délais respectés et un emballage qui assure la sécurité des produits.
Dec 02, 2025
Une logistique bien organisée, livraison sans souci.
Dec 02, 2025
Mit der sicheren Verpackung von DiGi Electronics kommen meine Elektronikbauteile stets unversehrt an. Die Preise sind zudem sehr überzeugend.
Dec 02, 2025
Support staff was friendly and gave detailed answers.
Dec 02, 2025
I received my order faster than expected, thanks to their efficient service.
Dec 02, 2025
Their customer service team was readily available and highly professional.
Dec 02, 2025
Their logistics process is seamless, and after-sales responses are prompt.
Dec 02, 2025
Their product diversity enables us to support various programs and initiatives effectively.
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Frequently Asked Questions (FAQ)
When I replace the Fairchild H11B253 Darlington opto in an 8 mA, 35 V relay-driver with the ISP815XSM, what hidden turn-off delay risk appears and how do I keep the relay drop-out time under 3 ms without extra power rails?
In the ISP815XSM the Darlington’s stored charge raises tf to 53 µs (H11B253 ≈15 µs); at 8 mA LED the stored base can stretch turn-off to >700 µs—far beyond a 3 ms target. Mitigation: place a Schottky-diode speed-up (BAT54) across pins 3-4 in reverse parallel, add a 1 kΩ pull-down on the output, and keep If ≥10 mA; this clamps the stored charge and delivers repeatable <2 ms release without extra 5 V logic rails.
What derating rule prevents long-term CTR collapse if the ISP815XSM LED runs 24 h at 50 mA, 70 °C and what lifetime shift should I budget for 5300 Vrms reinforced designs?
ISP815XSM LED is derated with −0.6 %/°C above 25 °C; at 70 °C you must drop If to 25 mA (or heat-sink to keep junction ≤80 °C) to stay above 60 % CTR after 100 kh. For 5300 Vrms reinforced designs Isocom guarantees only package-level isolation; plan 80 % VIO safety margin because partial discharge starts above 4 kVrms at >80 % RH—add conformal coat to keep partial discharge <5 pC.
Can the ISP815XSM safely replace the Vishay VOM617A-3 in a 115 VAC zero-cross detect discrete circuit where LED current is 220 µA rms and what board changes prevent false triggers at hot 100 °C?
ISP815XSM Darlington has 60 % CTR min @ 1 mA, so 220 µA gives only ≈14 % CTR—output barely idles at 1 µA and fails to pull down the MCU (VOM617A gives 100 % @1 mA). Work-around: raise LED sense current to 0.8 mA peak with a 47 kΩ series resistor and add a 1 MΩ load to Vout to shunt leakage—then ISP815XSM crosses MCU <0.8 V threshold even at 100 °C while keeping 5300 V isolation.
My high-speed RS-485 failsafe loop uses an ISP815XSM isolated open-collector status line (pull-up 3.3 V, 1 kΩ). At 30 °C the 60 µs tr makes the bus look still busy 1 µs after stop bit—how do I guarantee 250 kbps without violating 80 mA max?
The intrinsic 60 µs tr of ISP815XSM Darlington is way too slow for 4 µs bit times. Instead of over-driving, keep ISP815XSM but add an external 40 V NPN (MMBT5401) wired common-emitter. The opto now drives only the base (≤1 mA) so the composite stage gives 250 ns fall while respecting ISP815XSM 80 mA limit and 5300 V isolation.
During cost-reduction I swapped TLP185GB (phototransistor) to ISP815XSM on the same SO-16 adapter land; what keeps solder-joint stress below 100 µε under MSL-1 unlimited floor life at −30 °C start-up?
ISP815XSM sits in a 4-SMD lead-frame versus TLP185GB’s full-SO-4 body; its 0.46 mm gull-wing lead gives 2× CTE mismatch on FR-4. Widen pad by 0.1 mm, use SAC305 solder with 3 mil stencil, add 45° via tie to inner ground plane, and limit reflow ΔT<150 °C—this keeps shear strain <100 µε after 1000 −30 °C cycles and preserves 5300 Vrms isolation of ISP815XSM under MSL-1 unlimited floor life.
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.
ISP815XSM CAD Models
Isocom Components 2004 LTD ISP815XSM PCB symbols & footprints
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