WT121S1YZQ Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The WT121S1YZQ is an Electroswitch toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 6A at 125V AC and 28V DC. This panel-mount switch features a standard round actuator with solder lug termination and operates across -30°C to 85°C. The product is active and RoHS compliant, with 60,000 electrical life cycles. Substitute parts are identified when equivalent electrical ratings, mechanical mounting compatibility, and circuit configuration align with the original specification.

Substiute Parts

WT121S1YZQ

ElectroswitchIn Stock: 1152WT121S1YZQ Datasheet

Current PartRFQ

E103SYZQE

C&KIn Stock: 1157E103SYZQE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The E103SYZQE from C&K qualifies as a substitute based on the following alignment of critical parameters:

Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-Off-On
• Voltage rating AC: 125V
• Voltage rating DC: 28V
• Mounting type: Panel Mount
• Actuator type: Standard Round
• Termination style: Solder Lug
• Bushing thread: 1/4-40
• Operating temperature range: -30°C to 85°C
• Actuator material: Brass, Chrome Plated

Allowable Variation:

• Current rating: E103SYZQE is rated 7.5A, exceeding the 6A requirement of WT121S1YZQ. Higher current capacity maintains compatibility for applications within the original 6A specification.

Parameter Comparison

Engineering Selection Recommendations

Both WT121S1YZQ and E103SYZQE are active products with current regulatory compliance. The WT121S1YZQ maintains RoHS compliance, while the E103SYZQE achieves ROHS3 compliance, indicating alignment with current environmental standards. The E103SYZQE provides additional ingress protection (IP57) and higher current capacity (7.5A versus 6A), making it suitable for applications requiring enhanced environmental sealing. The WT121S1YZQ offers extended electrical life (60,000 cycles versus 40,000 cycles), which may be relevant for high-cycle-count applications. Actuator length differs (12.90mm versus 10.16mm), requiring panel cutout verification during physical integration.

Frequently Asked Questions (FAQ)

Q: Can E103SYZQE replace WT121S1YZQ in existing designs? A: Yes, provided the 10.16mm actuator length of E103SYZQE accommodates the panel cutout designed for WT121S1YZQ's 12.90mm actuator. Electrical parameters, circuit configuration, and mounting thread are compatible.

Q: What is the significance of the current rating difference? A: The E103SYZQE's 7.5A rating exceeds the WT121S1YZQ's 6A requirement. This higher capacity does not compromise compatibility for circuits designed for 6A operation and provides additional margin for transient conditions.

Q: Does the IP57 rating of E103SYZQE affect substitution? A: IP57 ingress protection is an enhancement not present in WT121S1YZQ. It provides additional environmental sealing and does not negatively impact substitution. Applications not requiring this protection remain unaffected.

Q: How do electrical life cycles impact part selection? A: WT121S1YZQ specifies 60,000 cycles versus E103SYZQE's 40,000 cycles. For applications exceeding 40,000 cycles, WT121S1YZQ is preferred. For applications within 40,000 cycles, both parts are equivalent.

Q: Are there packaging or inventory considerations? A: Both parts are available in bulk packaging with comparable inventory levels (1078 pcs for WT121S1YZQ, 1080 pcs for E103SYZQE). Procurement timelines should be verified with suppliers.