SFH615A-2X019T Vishay Phototransistor (Small Outline Packages) In Stock
Vishay SFH615A-2X019T is a single-channel phototransistor optocoupler in a DIP-4 package with 5000 V isolation voltage, 45% current transfer ratio, and 70 V collector-emitter breakdown voltage. UL recognized and VDE approved for safety-critical isolation applications in industrial and power supply circuits. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Vishay
- Package
- Small Outline Packages
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- SFH615A-2X019T Datasheet PDF
- Category
- Phototransistor
- Temp Range
- -55.0°C to 100.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 5000 V galvanic isolation voltage meeting IEC 60747-5-5 safety standards for mains-connected equipment
- 45% nominal current transfer ratio (CTR) enabling efficient LED-to-phototransistor drive with 60 mA maximum forward current
- 70 V collector-emitter breakdown voltage supporting output circuit operation on 24 V to 48 V industrial control rails
- UL recognized and VDE approved construction qualifying it for use in safety-certified industrial and consumer power supply designs
Applications
The SFH615A-2X019T is used for galvanic isolation in switch-mode power supply feedback loops, industrial 24 V relay drivers, and programmable logic controller (PLC) digital I/O modules where a 5000 V isolation barrier is required between the mains-referenced and logic-referenced circuit sections. Its 45% CTR and 50 nA dark current make it suitable for precision optoisolated analog signal transfer in industrial sensors and medical equipment where leakage current must remain below 100 nA. The DIP-4 package simplifies through-hole PCB assembly in safety-certified equipment manufactured under IEC 60950 or IEC 62368 standards.
Specifications
| Factory Lead Time | 10Weeks |
| YTEOL | 6 |
| Additional Feature | UL RECOGNIZED, VDE APPROVED |
| Coll-Emtr Bkdn Voltage-Min | 70V |
| Configuration | SINGLE |
| Current Transfer Ratio-Nom | 45% |
| Dark Current-Max | 50nA |
| Forward Current-Max | 0.06A |
| Isolation Voltage-Max | 5000V |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Optoelectronic Device Type | TRANSISTOR OUTPUT OPTOCOUPLER |
| Terminal Finish | Matte Tin (Sn) |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.40.80.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What isolation voltage and collector-emitter breakdown voltage does the SFH615A-2X019T provide?
The SFH615A-2X019T provides 5000 V RMS galvanic isolation between the LED input and phototransistor output, meeting IEC 60747-5-5 reinforced insulation requirements for mains-connected equipment. The phototransistor side has a minimum 70 V collector-emitter breakdown voltage, allowing output circuit operation on industrial 24 V or 48 V DC control rails with adequate voltage margin.
How does the 45% current transfer ratio of the SFH615A-2X019T affect LED drive current requirements?
With a 45% nominal CTR, the SFH615A-2X019T requires a forward input current of about 10 mA to generate a collector output current of 4.5 mA, sufficient to drive a standard logic gate or pull a 10 kohm load resistor to near zero volts on a 5 V rail. The 60 mA maximum forward current limit allows transient overdrive for fast switching, but steady-state operation should stay below 10 mA to 20 mA to remain within the LED power dissipation budget.
In which safety-certified application segments does the SFH615A-2X019T's VDE approval provide a qualification advantage?
VDE approval per EN 60747-5-5 and UL recognition allows the SFH615A-2X019T to be used directly in equipment seeking CE marking under the Low Voltage Directive and UL certification for North American markets. This dual approval is especially valuable in switch-mode power supply designs, industrial automation controllers, and medical monitoring equipment where independent safety body certification of the isolation component reduces overall product certification time and cost.
Can the SFH615A-2X019T be used in an SMPS feedback loop, and what bandwidth limitation should designers consider?
Yes, the SFH615A-2X019T is widely used in flyback SMPS feedback paths, connecting the secondary-side error amplifier output to the primary-side PWM controller through the 5000 V isolation barrier. Its phototransistor bandwidth (typically 50 kHz to 100 kHz small-signal bandwidth) is sufficient for control loop crossover frequencies below 10 kHz, which is the typical design target for 65 W to 200 W power adapters operating at 65 kHz to 130 kHz switching frequency.
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