CM15S1520 Reed Switch - Equivalent & Substitute Parts

Part Overview

The CM15S1520 is a molded body reed switch manufactured by Coto Technology, configured as a single-pole single-throw normally open (SPST-NO) device rated for 500mA switching current at 200V. This component features surface mount termination with an operate range of 15–20AT and is classified as obsolete. Due to its obsolete product status, identifying compatible substitute components is necessary to maintain design functionality in applications requiring reed switch solutions with equivalent electrical and mechanical parameters.

Substiute Parts

CM15S1520

Coto TechnologyIn Stock: 1072CM15S1520 Datasheet

Current PartRFQ

59165-1-S-00-A

Littelfuse Inc.In Stock: 649159165-1-S-00-A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CM15S1520 can be substituted with the Littelfuse 59165-1-S-00-A based on functional equivalency in circuit configuration and core electrical parameters. Both components are molded body reed switches with SPST-NO configuration. Substitution compatibility is determined by the following critical parameters:

• Circuit Type: Both SPST-NO (single-pole single-throw normally open)
• Switching Current Capability: CM15S1520 rated at 500mA (AC/DC); 59165-1-S-00-A rated at 350mA (AC) / 500mA (DC)
• Voltage Rating: CM15S1520 rated at 200V (AC/DC); 59165-1-S-00-A rated at 140V (AC) / 200V (DC)
• Power Rating: Both rated at 10VA / 10W
• Operating Temperature: CM15S1520 -40°C ~ 125°C; 59165-1-S-00-A -40°C ~ 105°C
• Mounting Consideration: CM15S1520 is surface mount; 59165-1-S-00-A is through hole (requires circuit board redesign)

Parameter Comparison

Engineering Selection Recommendations

The 59165-1-S-00-A from Littelfuse Inc. is an active product with current manufacturing support and meets RoHS3 compliance, whereas the CM15S1520 is obsolete. Both components carry identical REACH unaffected status and EAR99 ECCN classification.

Selection of the 59165-1-S-00-A requires consideration of the following differences:

• Mounting Architecture: The substitute part requires through-hole installation versus the original surface mount design. Circuit board layout modification is necessary.
• AC Voltage Rating: The substitute is rated at 140V AC compared to 200V AC for the original. DC voltage rating remains equivalent at 200V.
• AC Switching Current: The substitute is rated at 350mA AC versus 500mA for the original component. DC switching current is equivalent at 500mA.
• Operate Range: The substitute operates at 10–15AT versus 15–20AT for the original, representing a lower magnetic sensitivity threshold.
• Temperature Operating Range: The substitute supports -40°C to 105°C versus -40°C to 125°C for the original, narrowing the upper temperature limit by 20°C.

The substitute remains functionally equivalent for DC-dominant applications at 200V and 500mA. AC applications requiring 200V operation require alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can the 59165-1-S-00-A directly replace the CM15S1520 in a surface mount application?

A: No. The 59165-1-S-00-A is a through-hole component while the CM15S1520 is surface mount. Circuit board redesign and component placement modification are required.

Q: What are the AC voltage rating differences between these parts?

A: The CM15S1520 is rated at 200V AC. The 59165-1-S-00-A is rated at 140V AC. DC voltage rating for the substitute remains 200V. Applications requiring 200V AC operation should not use the substitute without voltage rating verification.

Q: Are both parts RoHS compliant?

A: Yes. The CM15S1520 is RoHS Compliant. The 59165-1-S-00-A is ROHS3 Compliant. Both meet regulatory environmental standards.

Q: How do the switching current ratings compare?

A: For DC applications, both parts are rated at 500mA switching current. For AC applications, the CM15S1520 is rated at 500mA while the 59165-1-S-00-A is rated at 350mA. AC circuit designs require current rating verification before substitution.

Q: What is the impact of the different operate ranges (15–20AT vs. 10–15AT)?

A: Operate range defines the magnetic field strength required to close the switch contacts. The CM15S1520 requires a stronger magnetic field (15–20AT) than the 59165-1-S-00-A (10–15AT). Applications using magnetic actuation must verify that existing magnet strengths remain compatible with the lower operate range threshold of the substitute.

Q: Does the operating temperature range difference affect component selection?

A: The CM15S1520 operates to 125°C maximum while the 59165-1-S-00-A operates to 105°C maximum. Applications requiring operation above 105°C cannot use the substitute. Verify maximum ambient and component temperatures in your design before selection.

Q: What is the REACH and ECCN classification status for both parts?

A: Both the CM15S1520 and 59165-1-S-00-A carry identical REACH Unaffected status and EAR99 ECCN classification, indicating no special regulatory restrictions or environmental substance concerns for either component.