E5 Optical Kit Encoder

E5 Features

  • Quick, simple assembly and disassembly
  • Rugged screw-together housing
  • Positive latching connector
  • Accepts .010 in. axial shaft play
  • 32 to 5,000 cycles per revolution (CPR)
  • 128 to 20,000 pulses per revolution (PPR)
  • 2 channel quadrature TTL squarewave outputs
  • Optional index (3rd channel)
  • Mounting compatibility with HEDS-5500

See more info below

Configure the E5

E5 Product Description

Restriction of Hazardous Substances

The E5 Series rotary encoder has a rugged glass-filled polymer enclosure with either a 5-pin or 10-pin latching connector. This optical incremental encoder is designed to easily mount to and dismount from an existing motor shaft to provide digital feedback information.       

The internal components consist of a mylar disk mounted to a precision machined aluminum hub and an encoder module. The module contains a highly collimated solid state light source and monolithic phased array sensor, which together provide a system extremely tolerant to mechanical misalignments.

The single-ended output version (S-option) is typically used with cables of 10 feet or less. For longer cable lengths, the differential output version (D-option) is recommended.

Attachment of the base to a surface may be accomplished by utilizing one of several machine screw bolt circle options. Positioning of the base to the centerline of a shaft is ensured by use of a centering tool (sold separately). The cover is securely attached to the base with two 4-40 flat head screws to provide a resilient package protecting the internal components.

A secure connection to the E5 Series encoder is made through a 5-pin (single-ended versions) or 10-pin (differential versions) latching connector. The mating connectors are available from US Digital with several cable options and lengths.

Avago Replacements:

US Digital's E5 encoder may now be used as a replacement for Avago HEDL-5500, HEDL-5600.

Product Specifications

View here or download the specifications


Operating Temperature, CPR < 2000 -40 to 100 C
Operating Temperature, CPR ≥ 2000 -25 to 100 C
Vibration (5Hz to 2kHz) 20 G
Electrostatic Discharge 
Single-ended (-S version), IEC 61000-4-2
Differential (-D, -L version), Human Body Model

± 4
± 2



Max. Shaft Axial Play ±0.010 in.
Max. Shaft Eccentricity Plus Radial Play (1) 0.004 in.
Max. Acceleration 250000 rad/sec²
For CPR < 2000
Max. RPM (2) (300 kHz)
e.x. CPR=1250, max. rpm=14400
e.x. CPR=100, max. rpm=60000
minimum value of ((18 x 10^6) / CPR) and (60000) rpm
For CPR >= 2000 and < 4000
Max. RPM (2) (360 kHz)
minimum value of ((21.6 x 10^6) / CPR) and (60000) rpm
For CPR >= 4000
Max. RPM (2) (720 kHz)
minimum value of ((43.2 x 10^6) / CPR) and (60000) rpm
Typical Product Weight
Single-ended (S-option)
Differential (D-option, L-option)


Codewheel Moment of Inertia 8.0 x 10^-6 oz-in-s²
Hub Set Screw #4-48  
Hex Wrench Size 0.050 in.
Encoder Base Plate Thickness 0.135 in.
3 Mounting Screw Size #0-80  
2 Mounting Screw Size #2-56 or #4-40  
3 Screw Bolt Circle Diameter 0.823 ± 0.005 in.
2 Screw Bolt Circle Diameter 0.750 ± 0.005 in.
Required Shaft Length (3)
  With E-option (3)
  With H-option (3)
0.445 to 0.570
0.445 to 0.750
> 0.445
Index Alignment to Hub Set Screw 180 Typical mechanical
Technical Bulletin TB1001 - Shaft and Bore Tolerances Download

(1) Position inaccuracy is proportional to shaft radial play.

(2) 60000 rpm is the maximum rpm due to mechanical considerations. The maximum RPM due to the module's maximum frequency response is dependent upon the module’s resolution (CPR). For resolutions of 32 to 1999 CPR the frequency response is 300 kHz, 2000 to 3999 CPR the frequency response is 360 kHz and 4000 CPR and greater the frequency response is 720 kHz.

(3) Add 0.125" to the required shaft length when using R-option.

Torque Specifications

Hub Set Screw to Shaft 2-3 in-lbs
Cover (4-40 screws through cover into base) 2-4 in-lbs
Base to Mounting Surface 4-6 in-lbs
Base to Mounting Adapter Plate 4-6 in-lbs
Adapter Plate to Mounting Surface 4-6 in-lbs
Module to Base 3.5-4 in-lbs

Phase Relationship

Single-Ended (S) / Differential (D) Option:

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

Broadcom/Avago compatible pin-out (L) Option:

B leads A for clockwise shaft rotation, and A leads B for counterclockwise rotation as viewed from the cover 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 or EM2 product pages.
Supply Voltage 4.5  5.0 5.5 V  
Supply Current   27 33 mA CPR < 500, no load 
  54 62 mA CPR ≥ 500 and < 2000, no load
  72 85 mA CPR ≥ 2000, no load
Low-level Output     0.5 V IOL = 8mA max., CPR < 2000
    0.5 V IOL = 5mA max., CPR ≥ 2000
  0.25   V no load, CPR ≥ 2000
High-level Output 2.0     V IOH = -8mA max. and CPR < 2000
2.0     V IOH = -5mA max. and CPR ≥ 2000
  4.8   V no load and CPR < 2000
  3.5   V no load and CPR ≥ 2000
Output Current Per Channel -8   8 mA CPR < 2000
-5   5 mA CPR ≥ 2000
Output Rise Time   110   nS CPR < 2000
  50   nS CPR ≥ 2000, ± 5mA load
Output Fall Time   100   nS CPR < 2000
  50   nS CPR ≥ 2000, ± 5mA load

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 or EM2 product pages.
Supply Voltage 4.5 5.0 5.5 V
Supply Current   29 36 mA CPR < 500, no load 
  56 65 mA CPR ≥ 500 and < 2000, no load
  74 88 mA CPR ≥ 2000, 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-Ended (1)10-pin Differential, Standard (2)10-pin Differential, L-option (2,3)
1 Ground 1 Ground 1 No Connection
2 Index 2 Ground 2 +5VDC power
3 A channel 3 Index- 3 Ground
4 +5VDC power 4 Index+ 4 No connection
5 B channel 5 A- channel 5 A- channel
    6 A+ channel 6 A+ channel
    7 +5VDC power 7 B- channel
    8 +5VDC power 8 B+ channel
    9 B- channel 9 Index-
    10 B+ channel 10 Index+

(1) 5-pin single ended mating connector is CON-FC5.
(2) 10-pin differential mating connector is CON-FC10.
(3) Broadcom / Avago compatible version.


1. Centering Tool

Part #: CTOOL - (Shaft Diameter)
Description: This reusable tool provides a simple method for accurately centering the E5 base onto the shaft. It is recommended for the following situations:

  • When using mounting screws smaller than #4-40.
  • When the position of the mounting holes is in question.
  • When using the 3-hole mounting pattern.
  • When using the T - option transfer adhesive.

Instructions: When mounting encoder base, slide centering tool down shaft until it slips into centering hole of encoder base. Tighten mounting screws, then remove centering tool.

2. Hex Tool

Depending on the order packaging option, either a hex driver or hex wrench is included.

Part #: HEXD-050
Description: Hex driver, 0.050" flat-to-flat for #3-48 or #4-48 set screws. Only included with -B or -1 packaging options.

Part #: HEXW-050
Description:  Hex wrench, .050" flat-to-flat for #3-48 or #4-48 set screws. Only included with -2 or -3 packaging options.

3. Spacer Tool

A spacer tool is included for all packaging options.

Part #: SPACER-E5

4. Screws

Screws for base mounting must be purchased separately. Screws for mounting the housing to the base are included.

Part #: SCREW-080-250-PH
Description: Pan Head, Philips #0-80 UNF x 1/4"
Quantity Required for Mounting: 3 per encoder

Part #: SCREW-256-250-PH
Description: Pan Head, Philips #2-56 UNC x 1/4"
Quantity Required for Mounting: 2 per encoder

Part #: SCREW-440-250-PH
Description: Pan Head, Philips #4-40 UNC x 1/4"
Quantity Required for Mounting: 2 per encoder

Product Change Notifications

Title Date Description Download
Update to 1" and 2" Disks - PCN 6232 5/24/2018 This notice is to inform our customers of a minor disk design modification that is being implemented for standard 1" and 2" disks. This is a continuation of a change that was implemented for our index disks in 2015.

We are revising the text on the disk, adding the US Digital logo and a line that is used internally by our manufacturing group.

The change does not effect the quadrature or index tracks; therefore, it has no impact on form, fit or function.
HUBDISK-1 Packaging Change Notification - PCN 6297 4/30/2018 As part of our ongoing continuous improvement efforts, US Digital is implementing a change to the packaging of our 1-inch Hubdisk assemblies.

We are replacing the current plastic tube packaging with a 25-count plastic tray. The tray is a two-piece design with snap-on lid and anti-static coated for ESD sensitive environments. This change is designed to enhance the ease of handling for our customers, easy removal of the individual hubdisk, and protection against potential damage due to long-term storage of hubdisk assemblies.

This change does not affect form, fit, or function of the final product.
Hub Set Screw Production Change - PCN 5367 7/20/2015 As part of our ongoing continuous improvement efforts, US Digital is implementing a change related to the production of our 5/16" (.313), 8mm (.315), 3/8" (.375), and 10mm (.394) HUBDISK assemblies. We are adding a low strength threadlocker to the set screw during our assembly process to assist in securing the set screw in the hub during transportation. This will aid in the set screw retention of these specific hub sizes; ensuring the retention is sufficient and avoid the potential of them backing out of the hub assembly during transit. This change does not affect form, fit or function. Download
EM1 & EM2 Update - PCN 4199 1/14/2014 Based on our continuous process improvement program, US Digital is changing the current marking method for our EM1 and EM2 encoder modules to a serialization method. This change will allow for each module to have a unique code; the current marking method is based on a date code system that includes all encoder modules produced within a specific week / year. The serialization system will be based on a hexadecimal system. 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.
E5 Insert Overmold - PCN 1008 8/23/2011 In an effort to enhance the robustness of our E5 encoder; the four threaded inserts pressed into the base are being replaced with similar threaded nuts that will be insert-molded into the encoder base. This change in process will retain the insert with much greater strength. Download
E5 Laser Marking - PCN 1009 8/23/2011 The primary purpose for this change is to create a more durable and longer lasting solution compared to the previous stick on label solution. The E5 encoder covers will now have the US Digital logo, part number, lot code, and pin-outs laser marked onto the top surface. Download
E5 Mold Update - PCN 1007 8/23/2011 The plastic E5 base and covers have been redesigned for improved moldability and aesthetics. Design changes are primarily alteration of surface drafts, additional or increased corner radii and additional coring out of thick regions. This update was carefully done to preserve the size and shape of the encoder. The new parts are dimensionally equivalent and will fit within the envelope of the previous parts. Only the E-option covers and the G-option bases have features with dimensional changes. Download

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

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    Related Products & Accessories

    The following are related products for the E5

    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. Bore

    3. Index

    4. Output

    5. Cover

    6. Base

    7. Packaging

    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...

    E5 Pricing

    Quantity Unit Price
    1 $51.50
    5 $43.09
    10 $35.63
    50 $33.78
    100 $32.78
    Over 100 Call for Quote
    Quantity Unit Price Subtotal
    $51.50 $51.50

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


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