PT22A012B Equivalent & Substitute Parts

Part Overview

The PT22A012B is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays, configured as a DPDT (2 Form C) with a 12VDC coil and 12A contact rating. This socketable relay is designed for plug-in termination applications requiring switching of AC loads up to 440VAC. The PT22A012B is classified as obsolete, necessitating identification of equivalent substitute components for ongoing system support and new designs.

Substiute Parts

PT22A012B

TE Connectivity Potter & Brumfield RelaysIn Stock: 956PT22A012B Datasheet

Current PartRFQ

KHAU-11D12-12

TE Connectivity Potter & Brumfield RelaysIn Stock: 3229KHAU-11D12-12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PT22A012B is determined by the following critical parameters that must be maintained or exceeded:

Mandatory Matching Parameters:

• Coil voltage: 12VDC
• Contact form: DPDT (2 Form C)
• Mounting type: Socketable
• Termination style: Plug In
• Operating temperature range: -45°C ~ 70°C minimum
• Coil type: Non Latching

Allowable Variation Parameters:

• Contact rating current: Substitute must equal or exceed 12A
• Switching voltage: Substitute must equal or exceed 440VAC
• Coil current: Variation acceptable within relay design specifications
• Operate/Release time: Variation acceptable for non-time-critical applications
• Contact material: Variation acceptable based on application requirements

The KHAU-11D12-12 is identified as a substitute part from the same manufacturer family. However, this substitute exhibits a reduced contact rating of 5A, which is below the 12A requirement of the original PT22A012B.

Parameter Comparison

Engineering Selection Recommendations

The KHAU-11D12-12 shares the same socketable DPDT configuration and 12VDC coil specification as the PT22A012B, enabling physical and electrical compatibility in socket-based installations. Both relays are manufactured by TE Connectivity Potter & Brumfield Relays and operate within the same temperature range.

However, the KHAU-11D12-12 exhibits reduced electrical performance specifications:

• Contact rating reduced from 12A to 5A
• Maximum switching voltage reduced from 440VAC to 240VAC

Selection of the KHAU-11D12-12 is appropriate only for applications where the load current does not exceed 5A and the switching voltage does not exceed 240VAC. For applications requiring the full 12A contact rating or 440VAC switching capability of the original PT22A012B, this substitute is not suitable.

The KHAU-11D12-12 is classified as active product status, providing ongoing availability and supply chain continuity. The PT22A012B obsolete status necessitates transition planning for production systems currently utilizing this component.

Frequently Asked Questions (FAQ)

Q: Can the KHAU-11D12-12 directly replace the PT22A012B in all applications?

A: No. The KHAU-11D12-12 has reduced contact rating (5A versus 12A) and reduced maximum switching voltage (240VAC versus 440VAC). Direct replacement is limited to applications operating within these reduced specifications.

Q: What is the primary difference between these two relays?

A: Both relays share identical socketable DPDT configuration, 12VDC coil voltage, and operating temperature range. The primary differences are contact current rating, maximum switching voltage, and contact material composition.

Q: Are these relays physically compatible in the same socket?

A: Both relays feature socketable mounting with plug-in termination, indicating physical compatibility with the same relay base or socket. However, electrical compatibility depends on application load requirements.

Q: What contact material difference exists between these parts?

A: The PT22A012B uses Silver Nickel (AgNi) contact material, while the KHAU-11D12-12 uses Silver Cadmium Oxide (AgCdO). Contact material selection affects switching characteristics and application suitability.

Q: Is the KHAU-11D12-12 suitable for high-voltage switching applications?

A: The KHAU-11D12-12 is rated for maximum 240VAC switching. Applications requiring 440VAC switching capability require alternative components rated for this voltage level.

Q: What is the coil current difference between these relays?

A: The PT22A012B draws 62.5 mA coil current, while the KHAU-11D12-12 draws 75 mA. This variation reflects different coil design and resistance specifications (192 Ohms versus 160 Ohms).

Q: How do the operate and release times compare?

A: The PT22A012B has 20 ms operate time and 20 ms release time. The KHAU-11D12-12 has faster response with 13 ms operate time and 6 ms release time. Faster switching may be advantageous in time-sensitive applications.