AS12AB Equivalent & Substitute Parts

Part Overview

The AS12AB is a slide switch manufactured by NKK Switches, classified as an SPDT (Single Pole Double Throw) switch with a 0.4VA current rating and 28V voltage rating. This through-hole mounted component features non-shorting contact timing and is designed for On-On switching applications. The part is currently in active production status with 719 units available in inventory.

Substitute parts become necessary when the AS12AB reaches end-of-life, when inventory is depleted, or when design requirements allow for alternative components that meet the same functional and electrical specifications. The TSS11DGPC from TE Connectivity ALCOSWITCH Switches is identified as a functional equivalent, though it carries an obsolete product status and presents specific parameter variations that must be evaluated during component selection.

Substiute Parts

AS12AB

NKK SwitchesIn Stock: 829AS12AB Datasheet

Current PartRFQ

TSS11DGPC

TE Connectivity ALCOSWITCH SwitchesIn Stock: 873TSS11DGPC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AS12AB is determined by strict alignment with the following core parameters:

• Circuit configuration must be SPDT
• Contact timing must be Non-Shorting (BBM)
• Switch function must be On-On
• Current rating must be 0.4VA (AC/DC)
• Mounting type must be Through Hole
• Termination style must be PC Pin
• Contact finish must be Gold
• Features must include Epoxy Sealed Terminals

The TSS11DGPC meets the primary functional requirements of circuit configuration, contact timing, switch function, current rating, mounting type, termination style, and contact finish. However, the substitute part presents the following parameter deviations:

• Voltage Rating - AC: 20V (versus 28V for AS12AB)
• Voltage Rating - DC: 20V (versus 28V for AS12AB)
• Actuator Length: 2.80mm (versus 2.50mm for AS12AB)
• Switch Travel: 3.05mm (versus 2.50mm for AS12AB)
• Operating Temperature Range: -20°C to 80°C (versus -30°C to 85°C for AS12AB)
• Mechanical Life: 60,000 Cycles (versus 50,000 Cycles for AS12AB)
• Electrical Life: 60,000 Cycles (versus 50,000 Cycles for AS12AB)
• Product Status: Obsolete (versus Active for AS12AB)

Parameter Comparison

Engineering Selection Recommendations

The AS12AB is the preferred component for new designs due to its active production status and ROHS3 compliance certification. The part maintains full inventory availability with 719 units in stock.

The TSS11DGPC may be considered as a substitute only in applications where the following conditions are met:

• Circuit voltage does not exceed 20V AC or DC (the substitute part is rated for 20V maximum, compared to the AS12AB's 28V rating)
• Operating temperature range requirements fall within -20°C to 80°C
• Mechanical and electrical life requirements do not exceed 60,000 cycles
• PCB layout can accommodate the 2.80mm actuator length and 3.05mm switch travel (versus 2.50mm for both parameters on the AS12AB)
• RoHS compliance is not a design requirement (TSS11DGPC carries "Not Applicable" RoHS status)

The TSS11DGPC's obsolete product status indicates limited future availability. This substitute should be used only when the AS12AB cannot be sourced and all parameter deviations have been validated against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the TSS11DGPC be used in a 28V circuit designed for the AS12AB?

A: No. The TSS11DGPC is rated for 20V maximum (AC/DC), while the AS12AB is rated for 28V. Using the substitute in a 28V circuit exceeds the component's voltage specification and creates a reliability risk.

Q: What is the impact of the different actuator lengths (2.50mm vs. 2.80mm)?

A: The 0.30mm difference in actuator length may affect PCB layout clearance and mechanical fit within the enclosure. Physical verification against the circuit board design is required before substitution.

Q: Does the switch travel difference (2.50mm vs. 3.05mm) affect functionality?

A: The 0.55mm increase in switch travel on the TSS11DGPC may alter the tactile feel and actuation characteristics. Applications sensitive to switch travel distance should retain the AS12AB.

Q: Why is the TSS11DGPC marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but long-term supply cannot be guaranteed.

Q: Is the TSS11DGPC suitable for RoHS-compliant designs?

A: No. The TSS11DGPC carries "Not Applicable" RoHS status, making it unsuitable for applications requiring ROHS3 compliance. The AS12AB is ROHS3 compliant and is the correct choice for regulated environments.

Q: What is the difference in contact material between these parts?

A: The AS12AB uses Phosphor Bronze contacts, while the TSS11DGPC uses Copper contacts. Both are finished with gold plating. Contact material differences may affect long-term reliability in specific environmental conditions.

Q: Can the TSS11DGPC be used in applications requiring -30°C operation?

A: No. The TSS11DGPC is rated for -20°C minimum, while the AS12AB operates down to -30°C. Applications requiring extended low-temperature operation must use the AS12AB.