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Product details
Overview
H22A6 from Fairchild Semiconductor is a slotted optical switch with phototransistor output, designed for object detection and position sensing in industrial automation and consumer electronics. It features a 0.125-inch slot width, 30 V collector-emitter voltage rating, 50 mA collector current capability, and operates across -40°C to +85°C ambient temperature range.
For engineers reviewing the H22A6 datasheet, pinout, applications, or equivalent options, key selection criteria include slot geometry compatibility, phototransistor saturation voltage under load, response time for high-speed counting, and ambient light immunity in unshielded enclosures.
Technical Context
The H22A6 integrates an infrared LED emitter and NPN silicon phototransistor in a single molded package with a fixed 3.18 mm (0.125") clear slot. Emitter and detector are optically aligned but electrically isolated, enabling galvanic separation between input and output circuits.
It operates in digital on/off mode with typical rise/fall times of 15 µs/20 µs at IC = 10 mA, and exhibits dark current ≤ 100 nA at VCE = 30 V, ensuring reliable state discrimination in low-duty-cycle sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slot Width | 3.18 mm - accommodates standard mechanical flag thicknesses without binding |
| VCEO | 30 V - supports direct interface with 24 V industrial control logic |
| IC (max) | 50 mA - drives standard PLC input modules or microcontroller pull-up networks |
| Rise/Fall Time | 15 µs / 20 µs - enables reliable counting up to 20 kHz in encoder applications |
| Operating Temp | -40°C to +85°C - qualified for use in factory-floor and outdoor kiosk environments |
| Isolation Voltage | 5000 VRMS - meets reinforced insulation requirements for Class I equipment |
Pinout & Package
Package: 4-pin DIP with 0.1" lead pitch and integral 3.18 mm slot; body material is black thermoplastic with UL94-V0 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | IR LED anode | Connect to current-limiting resistor for forward bias; max IF = 60 mA |
| 2 (Cathode) | IR LED cathode | Ground reference for emitter side; reverse voltage rating = 5 V |
| 3 (Collector) | Phototransistor collector | Output node; requires external pull-up to define logic HIGH level |
| 4 (Emitter) | Phototransistor emitter | Ground return for detector side; common with LED cathode in some configurations |
Key Features
| Feature | Design Value |
|---|---|
| Integrated emitter-detector pair | Eliminates alignment tolerance stack-up during assembly; no optical calibration required |
| High isolation voltage (5000 VRMS) | Enables safe interfacing between field-side sensors and controller-side logic without additional isolation components |
| Wide operating temperature range | Supports deployment in unheated warehouse conveyors and outdoor vending machines without derating |
| Fast switching response | Reduces pulse distortion in high-resolution rotary encoders and paper feed sensors |
Applications
| Industrial Encoder Sensing | Printer Paper Detection |
|---|---|
Use Scenario: Detecting rotation of a slotted metal disc in a motor feedback system. IC Role / Device Role / Timing Role: Digital edge detector providing quadrature A/B signals via dual H22A6 units. Use Value: 15 µs rise time ensures accurate pulse capture at 3000 RPM with 60-slot disc. | Use Scenario: Confirming paper presence in a laser printer's paper path. IC Role / Device Role / Timing Role: Flag-interrupt sensor triggering paper jam detection logic. Use Value: 3.18 mm slot accommodates standard paper thickness while rejecting dust accumulation false triggers. |
| Automated Door Safety Edge | Vending Machine Product Counting |
Use Scenario: Monitoring obstruction in sliding door track before full closure. IC Role / Device Role / Timing Role: Safety interlock switch detecting finger or object intrusion. Use Value: 5000 VRMS isolation prevents ground loop faults in AC-powered door controllers. | Use Scenario: Counting items dispensed through a spiral vend mechanism. IC Role / Device Role / Timing Role: Object-pass sensor generating count pulses per product drop. Use Value: -40°C to +85°C rating ensures reliability in temperature-cycled retail environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar slotted optical switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPB704 | 0.12" slot width; 20 mA IC max; slower 30 µs rise time | Limited to lower-speed counting (<10 kHz); less robust in high-vibration environments | Choose OPB704 only when cost sensitivity outweighs speed and ruggedness requirements |
| EE-SX670 | 0.1" slot; 30 V VCEO; 20 mA IC; higher dark current (500 nA) | Requires tighter ambient light shielding; unsuitable for dusty open-frame installations | Select EE-SX670 only if existing PCB layout matches its 2.54 mm lead spacing and smaller slot |
Compared with OPB704 and EE-SX670, the H22A6 delivers superior speed, higher output current drive, and lower dark current-making it preferred for industrial motion control where signal integrity and environmental resilience are critical.
Availability
H22A6 is available at Aetrix Electronics and suitable for industrial encoder sensing, printer paper detection, automated door safety edge, and vending machine product counting requiring stable component supply and long-term lifecycle support.
Supply support for H22A6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Fairchild Semiconductor was a U.S.-based analog and power IC manufacturer acquired by ON Semiconductor in 2016; known for high-reliability optoelectronics and discrete power solutions.
The H22A6 belongs to Fairchild's slotted optical switch family, engineered specifically for robust object detection in harsh industrial and commercial equipment where mechanical switches fail prematurely.
FAQ
What is the maximum continuous forward current for the H22A6 LED emitter?
The H22A6 LED emitter supports a maximum continuous forward current of 60 mA. Exceeding this value risks accelerated LED degradation and reduced service life. Designers should use a series resistor calculated for worst-case supply voltage and ambient temperature to maintain IF ≤ 60 mA. The H22A6 datasheet specifies derating above 25°C ambient, and thermal design must account for self-heating in sealed enclosures.
Can the H22A6 be used in AC-coupled input circuits?
No, the H22A6 is not designed for AC-coupled operation. Its phototransistor output is DC-coupled and intended for digital on/off detection. Attempting AC coupling would distort the output waveform due to the device's inherent capacitance and lack of internal biasing for signal amplification. For AC signal detection, a dedicated optocoupler with linear transfer characteristics or a separate amplifier stage is required. The H22A6 functions reliably only in DC-switching configurations.
Does the H22A6 require external pull-up resistors on its output?
Yes, the H22A6 phototransistor output is open-collector and requires an external pull-up resistor to define the logic HIGH state. Typical values range from 2.2 kΩ to 10 kΩ depending on load capacitance and required rise time. Without a pull-up, the collector remains floating and cannot assert a valid HIGH level. This design allows flexible interfacing with 3.3 V, 5 V, or 24 V logic systems-ensuring the H22A6 remains compatible across diverse control platforms.
What is the minimum detectable flag thickness for reliable operation of the H22A6?
The H22A6 reliably detects flags ≥ 0.005 inches (0.13 mm) thick when fully inserted into its 3.18 mm slot. Thinner materials may flex or tilt, causing partial beam interruption and inconsistent switching. Mechanical design must ensure flag rigidity and perpendicular insertion to avoid misalignment-induced hysteresis. The H22A6's optical path geometry and emitter intensity are optimized for this minimum thickness, and testing with actual flag material is recommended before final validation.
Is the H22A6 compliant with RoHS and REACH regulations?
Yes, the H22A6 manufactured after 2006 complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead content is restricted to <1000 ppm, and all SVHC substances are below threshold levels. Aetrix Electronics sources only RoHS-compliant date-code batches of the H22A6, and full compliance documentation-including material declarations and test reports-is available upon request for the specific lot supplied.
H22A6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- Slotted, PC Pins
- Packaging:
- Tube
- Product Status:
- Obsolete
- Sensing Distance:
- 0.118" (3mm)
- Sensing Method:
- Through-Beam
- Output Configuration:
- Phototransistor
- Current - DC Forward (If) (Max):
- 60 mA
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- 55 V
- Response Time:
- 8µs, 50µs
- Operating Temperature:
- -55°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole, Flange
H22A6 FAQ
1.How can I place an order for H22A6 through Aetrix?
Please submit a Request for Quotation (RFQ) for H22A6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for H22A6 reliable?
The price and inventory of H22A6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for H22A6 is usually 5 days.
3.What payment methods are accepted for H22A6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for H22A6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for H22A6?
H22A6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your H22A6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for H22A6?
For technical support, including H22A6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your H22A6 requirements.
6.How does Aetrix verify that H22A6 is sourced from the original manufacturer or authorized distributors?
All H22A6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that H22A6 meets industry standards.
7.What is the process for return or replacement of H22A6?
All H22A6 units undergo pre-shipment inspection (PSI). If there is an issue with H22A6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The H22A6 part is unused and in its original packaging.
Return procedure for H22A6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
H22A6 Tags
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GP1S094HCZ0F
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GP1S092HCPIF
SHARP/Socle Technology
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GP1S396HCPSF
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LTH-301-07
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RPI-352
Rohm Semiconductor
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RPI-0226
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TCPT1300X01
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EE-SX1320
Omron Electronics Inc-EMC Div
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TCUT1300X01
Vishay Semiconductor Opto Division
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EE-SX1103
Omron Electronics Inc-EMC Div
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H22A1
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EE-SX1041
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