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Bourns ENA1JB28L00128L Quadrature Optical Encoder

The Bourns ENA1J-B28-L00128L is a versatile rotary optical encoder designed for applications requiring precise position feedback. It utilizes a two-channel quadrature output to provide directional information, with a resolution up to 256 pulses per revolution. The encoder's compact size, combined with its high-speed capabilities (up to 3000 rpm with the ball bearing option), makes it suitable for a wide range of industrial and commercial applications, including robotics, automation, and instrumentation. It is RoHS compliant and offers a long operational life.

Authorized Distributors
Source:Newark
Part No:ENA1J-B28-L00128L
Stock:347
Inv Date:05-28-2026
Price: Unit price: $46.15
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Source:DigiKey
Part No:ENA1J-B28-L00128L
Stock:1010
Inv Date:05-28-2026
Price: Unit price: $54.5
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Part No:ENA1J-B28-L00128L
Stock:40
Inv Date:05-29-2026
Price: Unit price: $48.08
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Part No:ENA1J-B28-L00128L
Stock:30
Inv Date:05-28-2026
Price: Unit price: $55.59
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Part No:ENA1J-B28-L00128L
Stock:82
Inv Date:05-28-2026
Price: Unit price: $50.84
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Part No:ENA1J-B28-L00128L
Stock:82
Inv Date:05-28-2026
Price: Unit price: $50.84
Buy/RFQ:
Part No:ENA1J-B28-L00128L
Stock:18
Inv Date:05-29-2026
Price: N/A
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Bourns ENA1JB28L00128L Quadrature Optical Encoder Specifications:

  • Two channel quadrature output: Two channel quadrature output
  • Ball bearing option: Ball bearing option for high operating speed up to 3000 rpm
  • Bushing or servo mount: Bushing or servo mount
  • Square wave signal: Square wave signal
  • Small size: Small size
  • Resolution: Resolution to 256 PPR
  • CMOS and TTL compatible: CMOS and TTL compatible
  • Electrical Travel: 2-bit quadrature code, Channel A leads Channel B by 90 º (electrical) with clockwise rotation
  • Resolution cycles per revolution: 25 to 256 cycles per revolution
  • Insulation Resistance: 1,000 megohms
  • Supply Voltage: 5.0 VDC ±0.25 VDC
  • Supply Current: 26 mA maximum
  • Output Voltage Low: 0.8 V maximum
  • Output Voltage High: 4 V minimum
  • Output Current Low: 25 mA minimum
  • Rise/Fall Time: 200 ns (typical)
  • Shaft RPM (Ball Bearing): 3,000 rpm maximum
  • Power Consumption: 136 mW maximum
  • Pulse Width (Electrical Degrees): 180 º ±45 º typ.
  • Pulse Width (Index Channel): 360 º ±90 º
  • Phase (Electrical Degrees): 90 º ±45 º typ.
  • Operating Temperature Range: -40 ºC to +75 ºC (-40 °F to +167 °F)
  • Storage Temperature Range: -40 °C to +85 °C (-40 °F to +185 °F)
  • Rotational Life (A & C Bushings): 10,000,000 revolutions
  • Rotational Life (W, S & T Bushings): 200,000,000 revolutions
  • IP Rating: IP 40
  • Mechanical Angle: 360 °
  • Continuous Torque (A & C Bushings): 1 N-cm (1.5 oz-in.) maximum
  • Continuous Torque (W, S & T Bushings): 0.07 N-cm (0.1 oz-in.) maximum
  • Mounting Torque: 1.7 to 2.0 N-m (15 to 18 lb.-in.) maximum
  • Shaft End Play: 0.30 mm (0.012 ”) T.I.R. maximum
  • Shaft Radial Play: 0.12 mm (0.005 ”) T.I.R. maximum
  • Weight: 11 gms. (0.4 oz.)
  • Terminals: Axial or radial pc pins or ribbon cable
  • Soldering Condition (Manual): 96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire 370 °C (700 °F) max. for 3 seconds
  • Soldering Condition (Wave): 96.5Sn/3.0Ag/0.5Cu solder with no-clean flux 260 °C (500 °F) max. for 5 seconds
  • Wash processes: Not recommended
  • Marking: Marking

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Frequently Asked Questions

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You can click on the BUY or RFQ button to purchase ENA1JB28L00128L from an authorized Bourns distributor.

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You can download the ENA1JB28L00128L datasheet or visit the Bourns website for support.

Who is the manufacturer of ENA1JB28L00128L?

Bourns

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