Equivalent & Substitute Parts for SW GR501/20-25 AT

Part Overview

The SW GR501/20-25 AT is a glass body reed switch manufactured by Standex-Meder Electronics, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device. This through-hole mounted component is rated for 500mA switching current at 200V AC/DC with a 10W power rating and operates within a 7–30AT magnetic field range. The GR501 series is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and support ongoing production requirements.

Substiute Parts

SW GR501/20-25 AT

Standex-Meder ElectronicsIn Stock: 958SW GR501/20-25 AT Datasheet

Current PartRFQ

SW GP501/20-25 AT

Standex-Meder ElectronicsIn Stock: 1440SW GP501/20-25 AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SW GR501/20-25 AT is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SPST-NO topology must be maintained
• Switching Current: 500mA (AC/DC) rating must be met or exceeded
• Switching Voltage: 200V AC and DC ratings must be met or exceeded
• Power Rating: 10W minimum
• Magnetic Operate Range: 7–30AT specification must be matched
• Magnetic Release Range: 4–9AT specification must be matched
• Mounting and Termination: Through-hole axial termination required
• Operating Temperature Range: -40°C to 125°C minimum
• Switch Type: Glass body reed construction

The SW GP501/20-25 AT satisfies all substitution criteria as a direct functional equivalent within the Standex-Meder Electronics product family. Both devices share identical electrical performance specifications, mechanical dimensions, and environmental operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The SW GP501/20-25 AT is the direct functional substitute for the obsolete SW GR501/20-25 AT. Selection of the GP501 series is based on the following engineering factors:

Product Status: The GR501 series is classified as obsolete. The GP501 series is active and maintains full production availability, ensuring long-term supply chain reliability.

Electrical and Mechanical Equivalence: All switching parameters, voltage ratings, current ratings, power ratings, magnetic operate and release ranges, timing characteristics, and physical dimensions are identical between the two part numbers.

Compliance and Certifications: The GP501 variant carries ROHS3 compliance certification, providing enhanced regulatory alignment for applications subject to environmental and hazardous substance restrictions. Both variants maintain REACH Unaffected status and EAR99 export classification.

Packaging Availability: The GP501/20-25 AT is available in bulk packaging with 1405 units in current stock, compared to 895 units of the obsolete GR501 variant.

Direct substitution of SW GP501/20-25 AT for SW GR501/20-25 AT requires no circuit redesign, PCB layout modification, or functional requalification.

Frequently Asked Questions (FAQ)

Q: Can the SW GP501/20-25 AT be used as a direct replacement for the SW GR501/20-25 AT without circuit modification?

A: Yes. The GP501/20-25 AT is electrically and mechanically identical to the GR501/20-25 AT across all specified parameters. No circuit redesign or PCB layout changes are required. The devices are pin-compatible and functionally equivalent.

Q: What is the primary reason for substituting the GR501 series?

A: The GR501 series is classified as obsolete. The GP501 series provides an active, production-supported alternative with identical electrical and mechanical specifications.

Q: Are there any compliance differences between the GR501 and GP501 variants?

A: The GP501/20-25 AT carries ROHS3 compliance certification, whereas the GR501 variant does not specify this certification. Both maintain REACH Unaffected status and EAR99 export classification. Applications requiring ROHS3 compliance should specify the GP501 variant.

Q: Do the physical dimensions differ between these two part numbers?

A: No. Both the GR501/20-25 AT and GP501/20-25 AT have identical overall length (2.126" / 54.00mm), body diameter (0.091" / 2.30mm), and body length (0.500" / 12.70mm). Through-hole axial termination is identical on both variants.

Q: What is the magnetic operate range for both switches?

A: Both switches operate within a 7–30AT (Ampere-Turn) magnetic field range and release within a 4–9AT range. These specifications are identical between the GR501 and GP501 series.

Q: Are there inventory considerations when selecting between these part numbers?

A: The GP501/20-25 AT has 1405 units in current stock, while the obsolete GR501/20-25 AT has 895 units available. For new designs and ongoing production, the GP501 variant is recommended due to active product status and superior inventory availability.

Q: What is the switching current and voltage rating for these devices?

A: Both switches are rated for 500mA switching current (AC/DC) at 200V AC and 200V DC, with a 10W power rating. These specifications are identical across both part numbers.

Q: Can these switches be used in AC and DC applications?

A: Yes. Both the GR501/20-25 AT and GP501/20-25 AT are rated for 500mA switching current in both AC and DC applications at 200V.