Equivalent & Substitute Parts for 8121SHZGE

Part Overview

The 8121SHZGE is an SPDT pushbutton switch manufactured by C&K, designed for panel mount applications with rear termination. This switch operates at 1A (AC/DC) with voltage ratings of 120V AC and 28V DC, featuring a round plunger actuator with white cap and solder lug termination. The component is Active in product status and ROHS3 compliant. Alternative models may be required due to inventory constraints, application-specific current requirements, or regional supply chain considerations.

Substiute Parts

8121SHZGE

C&KIn Stock: 6658121SHZGE Datasheet

Current PartRFQ

700SP7B10M1QEH

E-SwitchIn Stock: 1491700SP7B10M1QEH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 700SP7B10M1QEH from E-Switch qualifies as a substitute for the 8121SHZGE based on the following critical parameters:

Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-Mom
• Voltage rating - AC: 120V
• Voltage rating - DC: 28V
• Mounting type: Panel Mount, Rear
• Actuator type: Round, Plunger
• Termination style: Solder Lug
• Panel cutout dimensions: Circular - 6.35mm Dia
• RoHS compliance: ROHS3 Compliant
• Product status: Active

Differing Parameters:

• Current rating: 700SP7B10M1QEH is rated at 3A (AC/DC), exceeding the 1A requirement of 8121SHZGE
• Operating temperature range: 700SP7B10M1QEH operates -30°C ~ 85°C versus -30°C ~ 75°C
• Electrical life: 700SP7B10M1QEH rated at 50,000 cycles versus 60,000 cycles

The higher current rating of the substitute part does not prevent substitution in applications requiring 1A or less, as components rated for higher current can safely operate at lower current levels.

Parameter Comparison

Engineering Selection Recommendations

Both the 8121SHZGE and 700SP7B10M1QEH are Active products with ROHS3 compliance, making either suitable for new designs and existing applications. The 700SP7B10M1QEH provides a higher current capacity (3A versus 1A), which offers design margin for applications operating near the 1A threshold. The extended operating temperature range of the E-Switch component (-30°C ~ 85°C versus -30°C ~ 75°C) may be advantageous in environments with elevated temperature exposure. Selection between these parts should be based on availability, cost considerations, and specific application current and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the 700SP7B10M1QEH replace the 8121SHZGE in all applications?

A: Yes, for applications requiring 1A or less at 120V AC or 28V DC. The higher current rating of the substitute part does not create compatibility issues in lower-current circuits. Panel cutout dimensions, mounting configuration, and electrical interface are identical.

Q: What is the significance of the different current ratings?

A: The 8121SHZGE is rated for 1A maximum, while the 700SP7B10M1QEH is rated for 3A maximum. In applications drawing 1A or less, the higher-rated component operates safely with additional capacity margin. Applications exceeding 1A require the 700SP7B10M1QEH.

Q: Are there differences in mechanical durability?

A: The 8121SHZGE specifies 60,000 electrical cycles, while the 700SP7B10M1QEH specifies 50,000 electrical cycles. For applications requiring extended cycle life, the C&K component provides higher rated endurance.

Q: Do temperature operating ranges affect substitution?

A: The 700SP7B10M1QEH operates across -30°C ~ 85°C, providing 10°C additional upper temperature capability compared to the 8121SHZGE (-30°C ~ 75°C). Applications operating within the 8121SHZGE range are compatible with either part. Applications exceeding 75°C require the E-Switch component.

Q: Are both parts suitable for new designs?

A: Yes. Both components are Active products with ROHS3 compliance and identical circuit configuration, making either appropriate for new applications. Selection should be based on current requirements, temperature environment, and availability.