Specifications
| Type | Description |
|---|---|
| Part Number | 4N25 |
| Manufacturer | Vishay |
| Product Type | Phototransistor Optocoupler |
| Category | Optocouplers |
| Package / Case | DIP-6 |
| Isolation Test Voltage | 5000 VRMS |
| Input Forward Current | 60 mA |
| Input Forward Voltage | typ 1.3 V, max 1.5 V; IF=50 mA |
| Collector Current | 50 mA |
| Collector-Emitter Breakdown Voltage | min 30 V; IC=1 mA |
| DC Current Transfer Ratio | min 20%, typ 50%; VCE=10 V, IF=10 mA |
| Rise / Fall Time | typ 2 µs |
| Operating Temperature | -55 to +100°C |
| Datasheet Status | request_only |
Product Overview
The Vishay 4N25 is a phototransistor optocoupler. Its input side uses an LED with 60 mA absolute maximum forward current, 5 V reverse voltage, and 3 A surge current for pulses of 10 µs. At IF=50 mA and Ta=25°C, the forward voltage is typically 1.3 V.
The output side is a phototransistor with collector current rated to 50 mA, peak collector current rated to 100 mA, and 150 mW output power dissipation.
The DIP-6 body measures 7.12 ± 0.3 mm x 6.5 ± 0.3 mm with 7.62 mm typical pin spacing. It is specified for 5000 VRMS isolation test voltage, at least 7 mm creepage and clearance.
Key Features
- 5000 VRMS isolation test voltage
- DIP-6 package with 7.62 mm pin spacing
- Minimum 7 mm creepage and clearance
- Input LED rated for 60 mA
- Phototransistor rated for 50 mA
- Minimum 20% DC current transfer ratio
- Typical 2 µs rise and fall times
- Typical 0.6 pF input-output capacitance
- Operating range -55°C to +100°C
- UL1577 agency approval
Typical Applications
- Isolated digital signal interfaces
- Microcontroller input isolation
- Power supply feedback isolation
- Industrial control signal coupling
- Low-capacitance isolation
Procurement Notes
When requesting a quote for 4N25, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For optocoupler and isolation sourcing, isolation voltage, CTR or output type, package, creepage distance, temperature grade, agency approvals and soldering conditions should be verified before approval.
FAQ
What type of device is the 4N25?
A Vishay phototransistor optocoupler with input LED and phototransistor output in a DIP-6 package.
What isolation rating is specified?
5000 VRMS isolation test voltage, at least 7 mm creepage and clearance.
What are the main input limits?
60 mA forward current, 5 V reverse voltage, 3 A surge current.
What is the DC current transfer ratio?
Minimum 20%, typical 50% at VCE=10 V and IF=10 mA.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 28, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.