ITR-9608 — Slotted Opto-Interrupter (IR LED + NPN Phototransistor)

**Source:** [Zhuhai Dapeng Elec-Tech Opto Interrupter Datasheet](https://www.datasheetarchive.com/pdf/download.php?id=5d1b8b5f6a7e8c3b4d5f6a7e8c3b4d5f6a7e8c&type=P&term=ITR-9608)
**Manufacturer:** Zhuhai Dapeng Elec-Tech Co., Ltd.
**Part Number:** ITR-9608
**Document:** Technical Data Sheet — Opto Interrupter

## Description

The ITR-9608 is a slotted optical switch (photo-interrupter) consisting of an infrared emitting diode (IR928-6c) and an NPN silicon phototransistor (PT928-6c) housed side-by-side on converging optical axes in a black thermoplastic housing. In normal operation the phototransistor receives radiation from the IR LED through the open slot; when an object is inserted into the slot the beam is broken and the phototransistor stops conducting. The device is intended for non-contact detection in mechanical systems where presence, position, or edge must be sensed optically.

## Key Specifications

| Parameter | Value |
| --- | --- |
| Device type | Slotted opto-interrupter (IR LED + NPN phototransistor) |
| Peak emission wavelength (λp) | 940 nm |
| Peak collector current (Ic(ON)) | 0.5 mA (min) at IF = 20 mA, VCE = 5 V |
| C-E saturation voltage (VCE(sat)) | 0.4 V (max) at Ic = 2 mA |
| Rise time (tr) | 15 µs (typ) |
| Fall time (tf) | 15 µs (typ) |
| IR LED forward voltage (VF) | 1.2 V typ / 1.5 V max at IF = 20 mA |
| Collector-emitter breakdown (BVCEO) | 30 V |
| Emitter-collector breakdown (BVECO) | 5 V |
| Forward current (IF) | 50 mA (max) |
| Collector current (Ic) | 20 mA (max) |
| Power dissipation (emitter / collector) | 75 mW / 75 mW at Ta = 25 °C |
| Operating temperature | −25 °C to +85 °C |
| Storage temperature | −40 °C to +85 °C |
| Package | 4-pin through-hole, 13.0 × 6.8 × 6.0 mm body |
| RoHS | Compliant, Pb-free |

## Features

- Fast response time
- High sensitivity
- Visible-light-cutoff design, peak wavelength λp = 940 nm
- Pb-free, RoHS compliant
- For direct PCB mounting

## Applications

- Mouse / scanner edge detection
- Switch scanner
- Floppy disk drive position sensing
- Non-contact limit switching
- Direct board-mount presence sensing

## Pin Configuration

| Pin | Name | Type | Description |
| --- | --- | --- | --- |
| 1 | Anode | AI | IR LED anode |
| 2 | Cathode | AI | IR LED cathode |
| 3 | Collector | AO | Phototransistor collector |
| 4 | Emitter | AO | Phototransistor emitter |

## Absolute Maximum Ratings

Over operating free-air temperature range (Ta = 25 °C).

| Section | Parameter | Symbol | Rating | Unit |
| --- | --- | --- | --- | --- |
| IR LED (Input) | Power dissipation at Ta ≤ 25 °C | Pd | 75 | mW |
| IR LED (Input) | Reverse voltage | VR | 5 | V |
| IR LED (Input) | Forward current | IF | 50 | mA |
| IR LED (Input) | Peak forward current (tw = 100 µs, DC = 1%) | IFP | 1 | A |
| Phototransistor (Output) | Collector power dissipation | Pc | 75 | mW |
| Phototransistor (Output) | Collector current | Ic | 20 | mA |
| Phototransistor (Output) | Collector-emitter breakdown | BVCEO | 30 | V |
| Phototransistor (Output) | Emitter-collector breakdown | BVECO | 5 | V |
| Operating temperature | | Topr | −25 to +85 | °C |
| Storage temperature | | Tstg | −40 to +85 | °C |
| Lead soldering temperature (1/16 in from body, 5 s max) | | Tsol | 260 | °C |

## Electrical Characteristics

Ta = 25 °C.

| Section | Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
| --- | --- | --- | --- | --- | --- | --- | --- |
| IR LED | Forward voltage | VF1 | | 1.2 | 1.5 | V | IF = 20 mA |
| IR LED | Forward voltage | VF2 | | 1.4 | 1.8 | V | IF = 100 mA, tp = 100 µs, tp/T = 0.01 |
| IR LED | Forward voltage | VF3 | | 2.6 | 4.0 | V | IF = 1 A, tp = 100 µs, tp/T = 0.01 |
| IR LED | Reverse current | IR | | | 10 | µA | VR = 5 V |
| IR LED | Peak wavelength | λp | | 940 | | nm | IF = 20 mA |
| IR LED | Viewing half-angle | 2θ½ | | 60 | | Deg | IF = 20 mA |
| Phototransistor | Dark current | ICEO | | | 100 | nA | VCE = 20 V, Ee = 0 mW/cm² |
| Phototransistor | C-E saturation voltage | VCE(sat) | | | 0.4 | V | Ic = 2 mA, Ee = 1 mW/cm² |
| Transfer | Collector-on current | Ic(ON) | 0.5 | | | mA | VCE = 5 V, IF = 20 mA |
| Transfer | Rise time | tr | | 15 | | µs | VCE = 5 V, Ic = 1 mA, RL = 1 kΩ |
| Transfer | Fall time | tf | | 15 | | µs | VCE = 5 V, Ic = 1 mA, RL = 1 kΩ |

Notes: (*1) Peak-current conditions: tw = 100 µs, T = 10 ms. (*2) Soldering condition: t = 5 s maximum.

## Packages

- **Package:** 4-pin through-hole slotted opto-interrupter, black thermoplastic body
- **Body size:** 13.0 mm × 6.8 mm × 6.0 ± 0.2 mm
- **Slot width / depth:** 5.0 ± 0.2 mm slot, 3.2 ± 0.2 mm deep
- **Lead pitch:** 2.54 ± 0.2 mm between pin pairs; 10.0 ± 0.3 mm across the slot
- **Lead length (minimum):** 6.0 mm
- **Tolerances:** Dimensions ± 0.25 mm unless otherwise noted
- **Pin 1 orientation:** Anode on the IR emitter side; see the Pinout tab for the full mapping
- **Companion dice:** IR928-6c (IR LED) and PT928-6c (phototransistor)