SPSG040F103U Equivalent & Substitute Parts

Part Overview

The SPSG040F103U is a 10k Ohm 1 Watt cermet linear potentiometer manufactured by Honeywell Sensing and Productivity Solutions. This panel mount component features a single gang configuration with solder lug termination and a 280° rotation angle. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where legacy component specifications must be maintained.

Key Parameters

Parameter	Value
Resistance	10k Ohm
Power Rating	1W
Taper	Linear
Number of Gangs	1
Resistive Material	Cermet
Termination Style	Solder Lug
Mounting Type	Panel Mount
Tolerance	±10%
Number of Turns	1
Actuator Diameter	0.125" (3.18mm)

Substitute Part Grouping Explanation

Substitution of the SPSG040F103U is based on strict equivalence of core electrical and mechanical parameters. The following criteria define acceptable substitutes:

Primary Equivalence Parameters:

Resistance value: 10k Ohm (exact match required)
Power rating: 1W (exact match required)
Resistive material: Cermet (exact match required)
Taper characteristic: Linear (exact match required)
Number of gangs: 1 (exact match required)
Termination style: Solder Lug (exact match required)
Mounting configuration: Panel Mount (exact match required)
Tolerance: ±10% (exact match required)

Secondary Parameters Allowing Variation:

Temperature coefficient (±100ppm/°C to ±150ppm/°C)
Rotation angle (280° to 295°)
Body diameter (0.375" to 0.500")
Actuator length (may vary)
Actuator type (flatted or slotted)

The substitute part 3862C-162-103AL from Bourns Inc. meets all primary equivalence criteria while operating within acceptable ranges for secondary parameters.

Parameter Comparison

Parameter	SPSG040F103U (Honeywell)	3862C-162-103AL (Bourns)	Match Status
Resistance (Ohms)	10k	10k	Equivalent
Power (Watts)	1W	1W	Equivalent
Tolerance	±10%	±10%	Equivalent
Taper	Linear	Linear	Equivalent
Number of Gangs	1	1	Equivalent
Number of Turns	1	1	Equivalent
Resistive Material	Cermet	Cermet	Equivalent
Termination Style	Solder Lug	Solder Lug	Equivalent
Mounting Type	Panel Mount	Panel Mount	Equivalent
Actuator Diameter	0.125" (3.18mm)	0.125" (3.18mm)	Equivalent
Temperature Coefficient	±100ppm/°C	±150ppm/°C	Within Tolerance
Rotation	280°	295°	Within Tolerance
Body Diameter	0.375" (9.52mm)	0.500" (12.70mm)	Variation
Actuator Type	Flatted	Slotted	Variation
Product Status	Obsolete	Active	Substitute Available
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compliant

Engineering Selection Recommendations

The 3862C-162-103AL from Bourns Inc. is a direct functional substitute for the obsolete SPSG040F103U. Selection of this substitute is supported by the following factors:

Electrical Equivalence: Both components share identical resistance (10k Ohm), power rating (1W), tolerance (±10%), and linear taper characteristics. The temperature coefficient variation (±150ppm/°C versus ±100ppm/°C) remains within acceptable operational ranges for standard potentiometer applications.

Mechanical Compatibility: Core mechanical parameters are equivalent, including actuator diameter (0.125"), solder lug termination, and panel mount configuration. The body diameter increase from 0.375" to 0.500" and actuator type change from flatted to slotted require physical space verification in the target application but do not affect electrical performance.

Compliance Status: The 3862C-162-103AL maintains RoHS3 compliance and is REACH affected, meeting current regulatory requirements. The SPSG040F103U, while RoHS compliant, carries obsolete product status with limited availability (947 units in stock versus 1287 units for the substitute).

Availability: The substitute part is classified as active product status, ensuring long-term supply chain reliability compared to the obsolete SPSG040F103U.

Frequently Asked Questions (FAQ)

Q: Can the 3862C-162-103AL directly replace the SPSG040F103U in existing applications?

A: Electrical substitution is direct. Physical installation requires verification that the larger body diameter (0.500" versus 0.375") and slotted actuator (versus flatted) accommodate the existing mechanical interface and control mechanism.

Q: What is the significance of the temperature coefficient difference?

A: The SPSG040F103U operates at ±100ppm/°C while the 3862C-162-103AL operates at ±150ppm/°C. Both values are standard for cermet potentiometers. Selection depends on application temperature stability requirements. The 50ppm/°C difference is negligible for most industrial and consumer applications.

Q: Are there differences in rotation angle that affect functionality?

A: The SPSG040F103U provides 280° rotation while the 3862C-162-103AL provides 295°. This 15° difference is within standard manufacturing tolerances for single-turn potentiometers and does not affect functional performance in applications requiring full-range resistance adjustment.

Q: What packaging considerations apply to the 3862C-162-103AL?

A: The substitute is supplied in bulk packaging. The SPSG040F103U packaging specification was not provided in the original documentation. Confirm packaging requirements for your procurement process.

Q: Does the actuator type change from flatted to slotted affect performance?

A: Actuator type affects only the control interface (tool compatibility for adjustment). Electrical and mechanical performance remain identical. Verify that adjustment tools and control knobs are compatible with the slotted actuator design.

Q: Are both components RoHS compliant?

A: Yes. The SPSG040F103U is RoHS compliant. The 3862C-162-103AL is ROHS3 compliant, meeting current and future regulatory requirements.

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