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H6 Ball Bearing Optical Shaft Encoder

H6 Features

  • Ball bearing option tracks to 10,000 RPM
  • 2-channel quadrature, TTL squarewave outputs
  • 3rd channel index option available on some resolutions
  • 64 to 10,000 cycles per revolution (CPR)
  • 256 to 40,000 pulses per revolution (PPR)
  • Wide operating temperature

See more info below

Configure the H6

H6 Product Description

Restriction of Hazardous Substances

The H6 series ball bearing optical shaft encoder has a molded plastic, glass-filled enclosure, which utilizes either a 5-pin or 10-pin latching connector. This non-contacting rotary to digital converter is designed to provide digital feedback information.

The H6 is fully assembled with a brass shaft, two 1/4" ID by 1/2" OD ball bearings and a mounting plate. The mounting plate comes with 4 mounting holes for #2 - #4 size screws.

A secure connection to the H6 series encoder is made through a 5-pin (single-ended versions) or 10-pin (differential versions) latching connector (sold separately). The mating connectors are available from US Digital with several cable options and lengths.

For differential versions, the internal differential line driver (26C31) can source and sink 20mA at TTL levels. The recommended receiver is the industry standard 26C32. Maximum noise immunity is achieved when the differential receiver is terminated with a 150 Ω resistor in series with a .0047 μF capacitor placed across each differential pair. The capacitor simply conserves power; otherwise power consumption would increase by approximately 20mA per pair, or 60mA for 3 pairs.

Product Specifications

View here or download the specifications


Operating Temperature (CPR < 3600) -40 to 100 C
Operating Temperature (CPR ≥ 3600) -25 to 100 C
Vibration (5Hz to 2kHz) 20 G
Electrostatic Discharge 
Single-ended (-S version), IEC 61000-4-2
Differential (-D version), Human Body Model

± 4
± 2



Parameter Dimension / Units
Max. Acceleration 100000 rad/sec²
Max. Shaft Speed (mechanical) 10000 rpm (1)
Max. Shaft Torque 0.05 in-oz
Max. Shaft Loading 2 lbs.
Bearing Life life in millions of revs. = (90/P)³
where P = radial load in pounds.

3.02 oz.
3.15 oz.
Max. Shaft Runout 0.006 in. T.I.R.
Mounting Plate Screw Torque (#2-56) 2-3
Moment of Inertia 0.001 oz-in-s²
Technical Bulletin TB1001 - Shaft and Bore Tolerances Download

(1) The maximum speed due to electrical considerations is dependent on the CPR. See the EM1 and EM2 product pages.

Phase Relationship

B leads A for clockwise shaft rotation, and A leads B for counterclockwise rotation when viewed from the shaft side of the encoder.

Single-ended Electrical

  • Specifications apply over entire operating temperature range.
  • Typical values are specified at Vcc = 5.0Vdc and 25°C.
  • For complete details, see the EM1 and EM2 product pages.
Supply Voltage 4.5  5.0 5.5 V  
Supply Current   27 33 mA CPR < 1000, no load 
  54 62 mA CPR ≥ 1000 and < 3600, no load
  72 85 mA CPR ≥ 3600, no load
Low-level Output     0.5 V IOL = 8mA max., CPR < 3600
0.5 mA IOL = 5mA max., CPR ≥ 3600
mA no load, CPR < 3600
mA no load, CPR ≥ 3600
High-level Output 2.0     V IOH = -8mA max., CPR < 3600

V IOH = -5mA max., CPR ≥ 3600

4.8   V no load, CPR < 3600

V no load, CPR ≥ 3600
Output Current Per Channel -8   8 mA CPR < 3600
-5   5 mA CPR ≥ 3600
Output Rise Time   110   nS CPR < 3600
  50   nS CPR ≥ 3600
Output Fall Time   35   nS CPR < 3600
  50   nS CPR ≥ 3600

Differential Electrical

  • Specifications apply over entire operating temperature range.
  • Typical values are specified at Vcc = 5.0Vdc and 25°C.
  • For complete details, see the EM1 and EM2 product pages.
Supply Voltage 4.5 5.0 5.5 V
Supply Current   29 36 mA CPR < 1000, no load 
  56 65 mA CPR ≥ 1000 and < 3600, no load
  74 88 mA CPR ≥ 3600, no load
Low-level Output   0.2 0.4 V IOL = 20mA max.
High-level Output 2.4 3.4   V IOH = -20mA max.
Differential Output Rise/Fall Time     15  nS  


5-pin Single-ended10-pin Differential
1 Ground 1 Ground
2 Index 2 Ground
3 A channel 3 Index-
4 +5VDC power 4 Index+
5 B channel 5 A- channel
    6 A+ channel
    7 +5VDC power
    8 +5VDC power
    9 B- channel
    10 B+ channel

Product Change Notifications

Title Date Description Download
Laser Marking - PCN 5253 6/17/2015 As part of our ongoing continuous improvement efforts, US Digital is changing the labeling/marking method for our E3, E6, H3, H6, S1, S2 and S6 products. Download
EM1 LED Die - PCN 1016 2/7/2013 As part of US Digital's continual assurance of supply strategy, we have qualified additional sources for our LED die used in our EM1 encoder module, which in turn impacts all of the following products:

EM1, E2, E3, E5, E6, H1, H15, H3, H5, H6, HB5M, HB6M, HD25, PE, S1, S2, S5, S6, T5 and T6

The device specification will remain the same, i.e. there will be no change to form, fit or function of the product(s) as specified by US Digital. The appropriate quality and reliability testing has been performed on representative products to ensure normal parametric distribution, consistent with US Digital's quality and reliability standards.

Additional Information

Product Notes

  • Cables and connectors are not included and must be ordered separately.
  • US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.

Downloads Available



3D Model Downloads

Please configure your product first to download a 3D model.
(Note: The formats below will become links if there are 3D models available.)

    • SolidWorks format
    • IGES format
    • Parasolid format
    • STEP format

    Related Products & Accessories

    The following are related products for the H6

    Product Configurator

    For pricing, this product requires configuration.

    Begin by completing either Option 1 or 2 below. Questions? Contact our support team.

    Option 1: Configure the Product

    Use the configuration tool to provide information regarding your product needs. Not sure what to do or need additional assistance? Our support team is here to help.

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    1. CPR

    2. Index

    3. Output

    Option 2: Enter the Product Part Number Directly

    If you know your product part number, enter it in the following field. The part number format looks something like this: E5-5000-394-IE-S-D-D-3...

    H6 Pricing

    Quantity Unit Price
    1 $112.50
    5 $83.30
    10 $72.35
    50 $64.90
    100 $61.05
    Over 100 Call for Quote
    Quantity Unit Price Subtotal
    $112.50 $112.50

    For purchasing or volume discounts, please configure the part above, then use the completed part number and contact us!


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