ADF04S Equivalent & Substitute Parts

Part Overview

The ADF04S is a 4-position surface mount DIP slide switch manufactured by TE Connectivity ALCOSWITCH Switches. This component is rated for 25mA at 24VDC with a single-pole single-throw (SPST) circuit configuration. The switch features a flush, recessed slide actuator, gold-plated copper alloy contacts, and operates across a temperature range of -30°C to 85°C.

The ADF04S is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for applications utilizing this switch configuration.

Substiute Parts

ADF04S

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1182ADF04S Datasheet

Current PartRFQ

1-1825059-3

TE Connectivity ALCOSWITCH SwitchesIn Stock: 103381-1825059-3 Datasheet

DirectRFQ

219-4LPST

CTS ElectrocomponentsIn Stock: 7014219-4LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADF04S is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration (SPST)
• Number of positions (4)
• Mounting type (Surface Mount)
• Termination style (Gull Wing)
• Pitch spacing (0.100" / 2.54mm)
• Actuator type (Slide, Standard)
• Actuator level (Flush, Recessed)

Secondary Compatibility Parameters:

• Current rating must equal or exceed 25mA
• Voltage rating must equal or exceed 24VDC
• Operating temperature range must encompass or exceed -30°C to 85°C
• Contact material and finish must support equivalent electrical performance
• Physical dimensions (height, length) must permit PCB layout compatibility

The substitute parts listed below meet these criteria within the specified electrical and mechanical tolerances for direct component replacement in the ADF04S application space.

Parameter Comparison

Engineering Selection Recommendations

1-1825059-3 (TE Connectivity ALCOSWITCH)

The 1-1825059-3 is the direct equivalent to the ADF04S within the TE Connectivity ALCOSWITCH product line. This part maintains identical electrical specifications (25mA at 24VDC), circuit configuration (SPST, 4-position), and physical dimensions. The 1-1825059-3 is classified as Active product status with ROHS3 compliance, providing long-term availability and regulatory alignment. This substitute is the primary selection for direct replacement applications where component specifications and PCB layout compatibility are critical.

219-4LPST (CTS Electrocomponents)

The 219-4LPST is a cross-manufacturer substitute with enhanced electrical performance characteristics. This part provides higher current capacity (100mA versus 25mA) and extended electrical life (2,000 cycles versus 1,000 cycles). The operating temperature range extends to -55°C, exceeding the ADF04S specification. Physical dimensions are comparable with minor variations in height (0.160" versus 0.177") and length (0.458" versus 0.478"). The voltage rating is 20VDC, which is lower than the ADF04S 24VDC specification. The 219-4LPST is ROHS3 compliant and Active product status. This substitute is suitable for applications where the lower voltage rating does not conflict with circuit requirements and where the enhanced current and cycle life provide design margin.

Frequently Asked Questions (FAQ)

Q: Can the 1-1825059-3 be used as a direct replacement for the ADF04S?

A: Yes. The 1-1825059-3 maintains identical electrical ratings (25mA, 24VDC), circuit configuration (SPST, 4-position), and physical dimensions (0.177" height, 0.478" length). Both parts feature the same actuator type, termination style, and pitch spacing. The 1-1825059-3 is the direct equivalent within the TE Connectivity ALCOSWITCH series.

Q: What are the key differences between the 1-1825059-3 and 219-4LPST?

A: The 1-1825059-3 is a direct TE Connectivity equivalent with identical electrical specifications. The 219-4LPST is a CTS Electrocomponents alternative with higher current capacity (100mA), extended electrical life (2,000 cycles), and wider operating temperature range (-55°C to 85°C). The 219-4LPST has a lower voltage rating (20VDC versus 24VDC) and slightly smaller physical dimensions. Both are ROHS3 compliant and Active status.

Q: Is the 219-4LPST suitable for 24VDC applications?

A: The 219-4LPST is rated for 20VDC maximum. Applications requiring 24VDC operation must use the ADF04S or 1-1825059-3. The 219-4LPST is not suitable for circuits operating at or above 24VDC.

Q: What is the impact of the washable specification difference?

A: The ADF04S and 219-4LPST are both washable. The 1-1825059-3 is not washable. For applications requiring post-assembly cleaning processes, the ADF04S or 219-4LPST are appropriate selections. The 1-1825059-3 requires alternative handling procedures to prevent moisture ingress during manufacturing.

Q: Are all three parts RoHS compliant?

A: The ADF04S is RoHS non-compliant. Both the 1-1825059-3 and 219-4LPST are ROHS3 compliant. For applications subject to RoHS regulatory requirements, the 1-1825059-3 or 219-4LPST must be selected.

Q: Do the physical dimension differences between parts affect PCB layout?

A: The 1-1825059-3 maintains identical dimensions to the ADF04S (0.177" height, 0.478" length) and requires no PCB layout modification. The 219-4LPST has slightly reduced dimensions (0.160" height, 0.458" length). PCB layouts designed for the ADF04S will accommodate the 219-4LPST without modification, though the reduced height may provide additional clearance margin.

Q: What is the mechanical life specification for the 219-4LPST?

A: The mechanical life specification for the 219-4LPST is not provided in the component data. The electrical life is specified at 2,000 cycles, which exceeds the ADF04S specification of 1,000 cycles. For applications where mechanical life data is required, the 1-1825059-3 provides the equivalent 1,000-cycle specification to the ADF04S.