H25 Single-turn Resolver Transducer

H25 Single-turn Resolver Transducer
  • IP67 rated; superior durability in harsh environments
  • Ideal for high-shock applications
  • Direct replacement for AB Bulletin 846
  • Variety of mounting styles
  • 100% compatible with AMCI's complete line of resolver interface products
  • Description

    H25 Single-Turn Resolver Transducer

    The H25 Series resolver transducer package offers a variety of mounting and connector styles. This IP67 rated package is the size of a 2.5" dia. optical encoder yet provides the ruggedness and durability of a resolver. No optical encoder can match its specifications. Available with 3/8", 10mm(-10 option), or 1/4"(-03 option) shaft, mil-spec connector, and flange or servo mount.

    Additionally, the H25 Series resolver transducer can be ordered with a heavy duty 5/8" (-05 option) shaft and flange mount for applications involving high side loads.

    AMCI offers a complete line of resolver interface solutions, enabling you to easily configure a resolver-based position feedback system in your favorite PLC, PAC, or network.

    Available Versions

    H25: Single-turn resolver transducer w/ optional customization
    Price | $750- $1,035/ea

    H25C-FE: Stainless Steel, Flange mount, 3/8" shaft, end connector resolver, NEMA 4 rated
    Price | $1,600/ea

    H25-FE-R3HC-11: Same as above, plus rated up to 150 degrees C
    Price | $1,835/ea

    Note: Pricing is US Domestic only




    Consult the factory for availability

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    Heavy-Duty Reliability

    The resolver transducer was originally developed to withstand the punishment of military applications, and has since benefited from more than 50 years of continuous use and development. Product packaging plants and stamping press lines are perfect examples of where you might find resolver based systems at work today.

    Builders and system integrators alike agree that the resolver transducer is unsurpassed in its ability to reliably supply rotary position data in the harshest industrial environments.

    The AMCI resolver product line is offered in aluminum or stainless steel construction, and boasts up to an IP67 rating. Solid shaft and hub shaft versions are available, and both types incorporate an oversized double row bearing that supports shaft loads up to 100 lbs. radial / 50 lbs. axial.

    Inside the Resolver Transducer



    Mechanical Specifications

    H25 Resolver Transducer
    Shaft loading: 1/4", 3/8", and 10mm shafts:
    40 lbs. radial/20 lbs. axial maximum shaft loading. Bearing life rated at 2X10^9 revolutions minimum at maximum shaft load.

    5/8" shaft:
    100 lbs. radial/50 lbs. axial maximum shaft loading. Bearing life rated at 2X10^9 revolutions minimum at maximum shaft load.
    Starting torque: 1/4”, 3/8”, & 10mm shafts:
    2.0 oz. in max @25° C

    5/8” shaft:
    6.0 oz. in max @25° C
    Moment of inertia:1/4”, 3/8”, & 10mm shafts:
    6.00 X 10-4 oz-in-sec2

    5/8” shaft:
    8.50 X 10-4 oz-in-sec2
    Weight: 5/8" Shaft: 1.8 lbs. max.
    H25-F1E: 1.6 lbs. max.
    H25-M1E: 2.3 lbs. max.
    All Others: 1.3 lbs. max.
    Housing:Cast aluminum
    Shaft:303 Stainless Steel

    Connector Pinout: (Military Equivalent Part #: MS3102E16S-1P)

    DNo connection


    H25 Resolver Transducer
    Input Frequency:5000 Hz
    Rotor Input Voltage:7.0 V rms
    Stator Output Voltage:6.65 V rms
    Transformation Ratio:0.95 ± 5%
    Input Current:20 mArms max.
    Phase Shift:10° max.
    Accuracy:max. error ±10 minutes


    H25 Resolver Transducer
    Operating temperature:-40° C to 125° C (-40° F to 257° F)
    Shock:50 G's for 11 mSec
    Vibration:15 g's to 2,000 Hz
    Enclosure:IP67 (valid only with working shaft seal)


    compatible cables

    For all cables, (x) = length of cable in feet.


    AMCI Part NumberUses Connector


    Compatible Connectors

    Connectors are sold separately or as part of a pre-assembled cable.


    AMCI Part NumberMilitary Equivalent
    90 DegreeMS-18MS3108A16S-1S



    Resolver transducers product family overview

    AMCI’s wide selection of resolver transducers, resolver interfaces for PLC based systems, and related accessories provide a complete, quality solution supported by over 25 years of product design, manufacturing, and application experience. Watch the video to learn more about these maximum duty rotary sensors!

    Duration 01:20


    Resolver Interfaces

    Resolver Interfaces Learn More


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    Ordering Information

    AMCI's sales team takes the hassle out of placing your order. We'll advise on product selection, alternatives, lead times, and present you with point of purchase options. Call (860) 585-1254 or email AMCI sales today! 

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    Create your part number 

    Generate your H25 part number by using the interactive tool below. Starting from left to right, use choose your selections from the drop down options while referencing the table below.

    • It is not necessary to place a character in all of the part number boxes.
    • In addition to the options shown below, AMCI also offers other size 25 resolver transducers that are direct replacements for the AB Bulletin 846 resolvers.
    • Two and Four speed resolvers are also available. Consult factory for availability.
    • Customers concerned with availability should request lead times on units with both the side and end connector location options.

    Part Number Guide

    Part Number CharacterH25 Resolver Transducer Selections
    Shaft Seal Type:Standard Option:
    Blank*= Nitrile shaft seal comes standard and is sufficient for most applications

    Special Order Option:
    V = Viton Seal
    Mounting Style:F = Square Flange
    S = 2.5" Diameter Servo Mount (unavailable w/ the 5/8” shaft option)
    F1 = C&A mounting (unavailable with the 5/8” shaft option)
    M1 = Motor Mount (unavailable with the 5/8” shaft option)
    Connector Location:S = Side
    E = End
    Mating connector sold separately
    Shaft Diameter:Standard Option:
    Blank* = 3/8"

    Special Order Option:
    03 = 1/4"
    05 = 5/8"
    06 = 3/8” with 3mm key
    10 = 10mm
    Connector Type:Standard Option:
    Blank* = 7 pin male connector, Military Equivalent MS3102E16S-1P

    Special Order Option:
    HFL = 15 foot high temperature integral cable


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