ORD 2210/10-20 AT Reed Switch Equivalent & Substitute Parts

Part Overview

The ORD 2210/10-20 AT is a glass body reed switch manufactured by Standex-Meder Electronics, configured as a single-pole single-throw normally open (SPST-NO) device. This component is rated for 700mA AC / 1A DC switching current at 150V AC / 200V DC with a 50W power rating and 10–20AT operate range. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Reed switches of this classification are used in proximity sensing, relay applications, and electromagnetic switching circuits where reliable contact closure is required across specified magnetic field ranges.

Substiute Parts

ORD 2210/10-20 AT

Standex-Meder ElectronicsIn Stock: 1006ORD 2210/10-20 AT Datasheet

Current PartRFQ

MDSR-7-10-20

Littelfuse Inc.In Stock: 44222MDSR-7-10-20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ORD 2210/10-20 AT is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Circuit configuration must remain SPST-NO
• Operate range must match or encompass 10–20 AT
• Switching current ratings (AC and DC) must meet or exceed application requirements
• Switching voltage ratings (AC and DC) must meet or exceed application requirements
• Mounting type must be Through Hole with Axial termination
• Operate and release time characteristics must be compatible with system timing requirements

Compliance Requirements:

• ROHS3 compliance required
• REACH unaffected status required

The MDSR-7-10-20 manufactured by Littelfuse Inc. satisfies these criteria with equivalent circuit configuration, matching operate range, and compatible timing characteristics. However, this substitute exhibits reduced current and power ratings compared to the original part, requiring application-level verification that switching loads do not exceed the substitute's specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MDSR-7-10-20 (Littelfuse Inc.)

The MDSR-7-10-20 is the designated substitute for the obsolete ORD 2210/10-20 AT. This component maintains functional equivalence in circuit topology, magnetic operate range, and timing characteristics. Both parts are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements for new designs and legacy system support.

Selection Considerations:

The MDSR-7-10-20 operates at reduced current and power ratings (350mA AC / 500mA DC versus 700mA AC / 1A DC, and 10W versus 50W). This substitution is valid only when application switching loads remain within the MDSR-7-10-20 specifications. Systems designed for the full 50W capacity of the original part require load analysis to confirm compatibility with the 10W rated substitute.

The MDSR-7-10-20 exhibits a longer release time (0.2ms versus 0.05ms), which may impact applications with strict timing requirements. Timing-critical circuits must evaluate whether this 4x increase in release time affects system performance.

The MDSR-7-10-20 is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete ORD 2210/10-20 AT.

Frequently Asked Questions (FAQ)

Q: Can the MDSR-7-10-20 directly replace the ORD 2210/10-20 AT in all applications?

A: Direct replacement is valid only when application switching loads do not exceed 350mA AC / 500mA DC and 10W power dissipation. Applications utilizing the full 700mA AC / 1A DC or 50W capacity of the original part require load reduction or alternative component selection.

Q: What is the significance of the operate range specification (10–20 AT)?

A: The operate range defines the magnetic field strength (in Ampere-Turns) required to close the reed switch contacts. Both the original and substitute parts share identical 10–20 AT specifications, ensuring equivalent magnetic sensitivity and activation behavior in proximity sensing and relay circuits.

Q: Are there packaging differences between these parts?

A: Both components use Through Hole mounting with Axial termination. The ORD 2210/10-20 AT has a body size of 0.108" Dia × 0.827" L (2.75mm × 21.00mm) with overall length of 2.181" (55.40mm). The MDSR-7-10-20 has a smaller body of 0.071" Dia × 0.500" L (1.80mm × 12.70mm) with overall length of 1.590" (40.39mm). PCB layout and mechanical clearance must accommodate the dimensional differences.

Q: How do the timing characteristics compare?

A: Both parts share identical 0.6ms operate time. The MDSR-7-10-20 has a 0.2ms release time compared to 0.05ms for the original part. In applications where rapid contact opening is critical, this 4x increase in release time may require circuit-level evaluation.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the ORD 2210/10-20 AT and MDSR-7-10-20 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations for electronic components.

Q: What is the current carrying capacity of each part?

A: The ORD 2210/10-20 AT carries 2.5A AC/DC. The MDSR-7-10-20 carries 800mA DC. Current carrying capacity differs from switching current rating and represents the maximum continuous current the contacts can sustain without degradation.