ADP04S Equivalent & Substitute Parts

Part Overview

The ADP04S is a DIP switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a 4-position SPST (Single Pole Single Throw) surface mount component with piano actuator. This switch is rated for 25mA at 24VDC and features gold-plated copper alloy contacts with a raised piano actuator design. The ADP04S is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

ADP04S

TE Connectivity ALCOSWITCH SwitchesIn Stock: 2200ADP04S Datasheet

Current PartRFQ

1571999-7

TE Connectivity ALCOSWITCH SwitchesIn Stock: 55291571999-7 Datasheet

DirectRFQ

193-4MS

CTS ElectrocomponentsIn Stock: 1064193-4MS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADP04S is determined by strict equivalence across the following critical parameters: circuit configuration (SPST), number of positions (4), voltage rating (24VDC), actuator type (piano with raised level), mounting type (surface mount, right angle), termination style (gull wing), and pitch (0.100"). Current rating, height above board, and product lifecycle status are secondary considerations that define the substitution tier.

The substitute parts identified for the ADP04S are grouped as follows:

Tier 1 Direct Equivalent: Part 1571999-7 maintains identical electrical specifications (25mA, 24VDC) and mechanical form factor, with the primary difference being active product status and RoHS3 compliance.

Tier 2 Functional Equivalent: Part 193-4MS from CTS Electrocomponents provides functional substitution with a higher current rating (50mA) and extended electrical life (7,000 cycles), suitable for applications where the ADP04S current capacity is sufficient but additional margin is required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Part 1571999-7 is the primary substitute for the ADP04S. Both components share identical electrical ratings (25mA, 24VDC), circuit configuration (SPST, 4-position), and mechanical specifications (surface mount, right angle, gull wing termination, 0.100" pitch). The 1571999-7 is currently in active production status with RoHS3 compliance, addressing the obsolescence of the ADP04S. The height above board differs by 0.030" (0.77mm), which is within typical PCB layout tolerances for DIP switch applications. The 1571999-7 is suitable for direct substitution in existing designs without circuit modification.

For Applications Requiring Higher Current Capacity: Part 193-4MS from CTS Electrocomponents provides functional equivalence with a doubled current rating (50mA versus 25mA) and significantly extended electrical life (7,000 cycles versus 1,000 cycles). This part maintains the same circuit configuration, voltage rating, actuator type, mounting method, and pitch. The 193-4MS is RoHS3 compliant and operates across an extended temperature range (-40°C to 85°C). The height above board is 0.056" (1.42mm) greater than the ADP04S, and the component is not washable. The 193-4MS is appropriate for designs where the ADP04S current capacity is marginal or where extended operational life is required.

Both substitute parts carry RoHS3 compliance, addressing regulatory requirements that the obsolete ADP04S does not meet.

Frequently Asked Questions (FAQ)

Q: Can the 1571999-7 be used as a direct drop-in replacement for the ADP04S?

A: Yes. The 1571999-7 maintains identical electrical specifications (25mA, 24VDC, SPST, 4-position) and mechanical form factor (surface mount, right angle, gull wing, 0.100" pitch). The height above board differs by 0.030" (0.77mm), which is within standard PCB layout tolerances. No circuit modifications are required.

Q: What is the primary difference between the ADP04S and 1571999-7?

A: The ADP04S is obsolete and RoHS non-compliant, while the 1571999-7 is in active production and RoHS3 compliant. Electrical and mechanical specifications are identical.

Q: When should the 193-4MS be selected instead of the 1571999-7?

A: The 193-4MS is selected when the application requires a current rating higher than 25mA or when extended electrical life (7,000 cycles) is necessary. The 193-4MS is rated for 50mA at 24VDC and provides approximately seven times the electrical cycle life of the ADP04S and 1571999-7.

Q: Are there any height above board considerations when substituting these parts?

A: Yes. The ADP04S has a height of 0.303" (7.70mm), the 1571999-7 is 0.273" (6.93mm), and the 193-4MS is 0.359" (9.12mm). PCB layout and clearance requirements must be verified for the 193-4MS, which is 0.056" taller than the ADP04S.

Q: Is the 193-4MS washable like the ADP04S?

A: No. The ADP04S and 1571999-7 are both washable, while the 193-4MS is not washable due to epoxy-sealed terminals. This is a critical consideration for applications requiring post-assembly cleaning processes.

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

A: The ADP04S and 1571999-7 operate from -30°C to 85°C. The 193-4MS operates from -40°C to 85°C, providing a 10°C lower temperature limit.

Q: Are all substitute parts RoHS compliant?

A: The ADP04S is RoHS non-compliant. Both the 1571999-7 and 193-4MS are RoHS3 compliant, meeting current regulatory requirements.

Q: What packaging options are available?

A: The ADP04S and 1571999-7 are supplied in bulk packaging. The 193-4MS is supplied in tube packaging. Packaging selection may affect procurement and handling procedures.