ADF05ST Equivalent & Substitute Parts

Part Overview

The ADF05ST is a DIP slide switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a single-pole single-throw (SPST) switch with 5 positions. This surface mount component is rated for 25mA at 24VDC and features a standard slide actuator with flush, recessed actuation level. The ADF05ST is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

ADF05ST

TE Connectivity ALCOSWITCH SwitchesIn Stock: 861ADF05ST Datasheet

Current PartRFQ

2-1825059-3

TE Connectivity ALCOSWITCH SwitchesIn Stock: 215562-1825059-3 Datasheet

DirectRFQ

219-5LPST

CTS ElectrocomponentsIn Stock: 51347219-5LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADF05ST is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Electrical Parameters:

• Circuit configuration (SPST required)
• Number of positions (5 positions required)
• Current rating (minimum 25mA required)
• Voltage rating (minimum 24VDC required)

Mechanical Parameters:

• Actuator type (Slide Standard required)
• Mounting type (Surface Mount required)
• Termination style (Gull Wing required)
• Pitch spacing (0.100" / 2.54mm required)
• Actuator level (Flush, Recessed required)

Parts meeting all these criteria are classified as direct equivalents. Parts exceeding electrical ratings while maintaining mechanical compatibility are classified as functional substitutes with enhanced performance capability.

Parameter Comparison

Engineering Selection Recommendations

2-1825059-3 (Direct Equivalent - Recommended Primary Substitute)

The 2-1825059-3 is a direct electrical and mechanical equivalent to the ADF05ST. Both parts share identical circuit configuration (SPST), position count (5), current rating (25mA), voltage rating (24VDC), actuator type, mounting configuration, and pitch spacing. The 2-1825059-3 is manufactured by the same supplier (TE Connectivity ALCOSWITCH) and maintains active product status, ensuring long-term availability and supply chain continuity. The 2-1825059-3 achieves ROHS3 compliance and MSL Level 1 rating, providing improved environmental and regulatory standing compared to the obsolete ADF05ST. This part is the optimal choice for direct replacement in existing designs without modification.

219-5LPST (Functional Substitute - Enhanced Performance)

The 219-5LPST is a functional substitute manufactured by CTS Electrocomponents. This part maintains mechanical compatibility through identical actuator type, mounting configuration, termination style, and pitch spacing. The 219-5LPST provides enhanced electrical performance with a current rating of 100mA (four times the ADF05ST rating) and extended electrical life of 2,000 cycles (double the ADF05ST rating). The 219-5LPST operates across an extended temperature range of -55°C to 85°C, providing superior thermal performance. However, the 219-5LPST voltage rating is 20VDC, which is 4VDC lower than the ADF05ST specification. The 219-5LPST is suitable for applications where the 20VDC rating is acceptable and where the enhanced current capacity and cycle life provide design margin. This part is ROHS3 compliant and carries MSL Level 1 rating. Both substitute parts are active products with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the 2-1825059-3 be used as a direct replacement for the ADF05ST without PCB modification?

A: Yes. The 2-1825059-3 is a direct equivalent with identical electrical ratings (25mA, 24VDC), mechanical dimensions, pitch spacing (0.100"), height above board (0.177"), and termination style (Gull Wing). No PCB layout changes are required.

Q: What is the key difference between the 2-1825059-3 and 219-5LPST substitutes?

A: The 2-1825059-3 maintains identical electrical specifications to the ADF05ST (25mA, 24VDC). The 219-5LPST provides higher current capacity (100mA) and extended electrical life (2,000 cycles) but operates at a lower voltage rating (20VDC). Selection depends on whether the application requires the full 24VDC rating or can operate at 20VDC.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the 2-1825059-3 and 219-5LPST are ROHS3 compliant, whereas the original ADF05ST is RoHS non-compliant. This provides regulatory advantage for new designs and updated production runs.

Q: What is the moisture sensitivity level (MSL) for the substitute parts?

A: Both substitute parts carry MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. The original ADF05ST lists MSL as Not Applicable.

Q: Can the 219-5LPST be used in a 24VDC circuit?

A: No. The 219-5LPST is rated for 20VDC maximum. Using this part in a 24VDC circuit exceeds its voltage specification and is not permitted.

Q: What is the mechanical life specification for the 219-5LPST?

A: The mechanical life specification for the 219-5LPST is not provided in the available technical data. The electrical life is specified as 2,000 cycles.

Q: Are the substitute parts available in the same packaging as the ADF05ST?

A: The ADF05ST is supplied in bulk packaging. Both substitute parts (2-1825059-3 and 219-5LPST) are supplied in tube packaging, which may affect procurement and handling procedures.

Q: What is the operating temperature range for each part?

A: The ADF05ST and 2-1825059-3 both operate from -30°C to 85°C. The 219-5LPST operates across an extended range of -55°C to 85°C, providing superior low-temperature performance.