51AEA-B28-B13 Equivalent & Substitute Parts

Part Overview

The 51AEA-B28-B13 is a 5k Ohm 1/2W linear panel mount potentiometer manufactured by Bourns Inc. as part of the Pro Audio 51 series. This component features conductive plastic resistive material, detent built-in switch, and PC pin termination for audio and professional equipment applications. The product is currently obsolete, making equivalent substitute parts necessary for ongoing maintenance, repair, and legacy system support where original components are no longer available.

Substiute Parts

51AEA-B28-B13

Bourns Inc.In Stock: 76751AEA-B28-B13 Datasheet

Current PartRFQ

81A1A-B28-A13L

Bourns Inc.In Stock: 114281A1A-B28-A13L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51AEA-B28-B13 is based on the following critical parameters that must remain constant or be compatible:

• Resistance value: 5k Ohm (exact match required)
• Taper: Linear (functional requirement for audio applications)
• Mounting type: Panel Mount with 3/8-32 bushing thread (mechanical compatibility)
• Termination style: PC Pins (circuit board connection requirement)
• Actuator specifications: Slotted type, 0.875" length, 0.250" diameter (physical fit and operation)
• Number of gangs: 1 (single channel operation)
• Number of turns: 1 (single rotation potentiometer)

The 81A1A-B28-A13L qualifies as a substitute based on matching all critical parameters. Differences in power rating, resistive material, tolerance, and temperature coefficient are within acceptable engineering margins for equivalent functionality in the intended application category.

Parameter Comparison

Engineering Selection Recommendations

The 81A1A-B28-A13L serves as the primary substitute for the obsolete 51AEA-B28-B13. Selection should be based on the following engineering criteria:

Product Status: The 81A1A-B28-A13L is active and in production, ensuring long-term availability and supply chain continuity compared to the obsolete 51AEA-B28-B13.

Regulatory Compliance: The 81A1A-B28-A13L is ROHS3 compliant, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant, which may present compliance issues in new designs or systems subject to RoHS regulations.

Mechanical Compatibility: Both parts share identical mounting specifications (3/8-32 bushing thread, panel mount), actuator dimensions (0.875" length, 0.250" diameter), and termination style (PC Pins), ensuring direct mechanical substitution in existing panel layouts and circuit board designs.

Electrical Performance: Both parts provide 5k Ohm linear taper with single-gang, single-turn operation. The substitute offers improved tolerance (±10% versus ±20%) and superior temperature stability (±150ppm/°C versus ±1000ppm/°C), providing enhanced performance characteristics.

Power Rating Consideration: The 81A1A-B28-A13L provides 2W power rating compared to the original 0.5W/1/2W rating. This higher rating provides additional thermal margin and operational headroom in applications where the original part was rated.

Frequently Asked Questions (FAQ)

Q: Can the 81A1A-B28-A13L directly replace the 51AEA-B28-B13 in existing equipment?

A: Yes. Both parts share identical mechanical specifications including bushing thread (3/8-32), panel mount configuration, actuator dimensions (0.875" x 0.250"), and PC pin termination. Direct substitution is mechanically and electrically compatible for the specified 5k Ohm linear taper application.

Q: What is the difference between conductive plastic and cermet resistive materials?

A: The 51AEA-B28-B13 uses conductive plastic material, while the 81A1A-B28-A13L uses cermet. Both materials support linear taper operation at 5k Ohm resistance. Cermet material in the substitute provides improved temperature stability (±150ppm/°C versus ±1000ppm/°C) and higher power handling (2W versus 0.5W/1/2W).

Q: Does the absence of a detent switch in the 81A1A-B28-A13L affect compatibility?

A: The original 51AEA-B28-B13 includes a detent built-in switch, while the 81A1A-B28-A13L does not. If detent functionality is required for the application, this difference must be evaluated against system requirements. Both parts provide identical linear taper and adjustment characteristics.

Q: What are the tolerance differences between these parts?

A: The 51AEA-B28-B13 specifies ±20% tolerance, while the 81A1A-B28-A13L specifies ±10% tolerance. The substitute provides tighter tolerance control, which may improve circuit performance and reduce calibration requirements in precision applications.

Q: Are there packaging differences between these parts?

A: The 51AEA-B28-B13 is obsolete with limited inventory. The 81A1A-B28-A13L is active production with bulk packaging availability and 1080 pieces in current stock, ensuring reliable supply for ongoing production and maintenance requirements.

Q: What is the rotation angle difference?

A: The 51AEA-B28-B13 provides 290° rotation, while the 81A1A-B28-A13L provides 300° rotation. Both are single-turn potentiometers with linear taper. The 10° difference represents a minor variation in mechanical sweep and does not affect functional compatibility for standard audio and control applications.

Q: Is the 81A1A-B28-A13L suitable for RoHS-regulated applications?

A: Yes. The 81A1A-B28-A13L is ROHS3 compliant, meeting current environmental regulations. The original 51AEA-B28-B13 is RoHS non-compliant and should not be used in applications subject to RoHS requirements.