PB-24SM-B Equivalent & Substitute Parts

Part Overview

The PB-24SM-B is a 24-channel I/O module rack manufactured by Sensata-Crydom in the PB series. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications. The module features card edge and screw terminal block connectors with standoff mounting, designed for compact I/O integration in industrial control systems.

Substiute Parts

PB-24SM-B

Sensata-CrydomIn Stock: 843PB-24SM-B Datasheet

Current PartRFQ

70MRCK24-EC

Grayhill Inc.In Stock: 77970MRCK24-EC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PB-24SM-B is determined by the following critical parameters:

• Channel Count: 24 channels (exact match required)
• Connector Configuration: Card edge and screw terminal blocks (both must be present)
• Mounting Method: Standoffs (mechanical compatibility requirement)
• Style Classification: Mini form factor (physical envelope constraint)
• Moisture Sensitivity Level: MSL 1 (Unlimited) (environmental tolerance match)

The 70MRCK24-EC from Grayhill Inc. satisfies all substitution criteria across these parameters, establishing it as a direct functional equivalent despite different manufacturer origin and series designation.

Parameter Comparison

Engineering Selection Recommendations

The 70MRCK24-EC represents the primary substitute for the obsolete PB-24SM-B. Key selection factors include:

Product Status: The 70MRCK24-EC maintains active production status, ensuring availability for new procurement and long-term supply chain stability, whereas the PB-24SM-B is obsolete and subject to inventory depletion.

Regulatory Compliance: Both components share identical REACH and ECCN classifications (REACH Unaffected, EAR99), confirming equivalent regulatory standing for export and environmental compliance purposes.

Functional Equivalence: Matching channel count (24), connector configuration (card edge and screw terminal blocks), mounting methodology (standoffs), and environmental rating (MSL 1) establish direct functional interchangeability within system designs.

RoHS Consideration: The 70MRCK24-EC is classified as RoHS non-compliant. Systems requiring RoHS compliance must evaluate this status against application requirements and regional regulations.

Frequently Asked Questions (FAQ)

Q: Can the 70MRCK24-EC directly replace the PB-24SM-B in existing installations?

A: Yes. Both components share identical channel count (24), connector types (card edge and screw terminal blocks), mounting method (standoffs), and environmental ratings (MSL 1). Physical form factor and electrical interface compatibility are established through these matching parameters.

Q: What is the significance of the PB-24SM-B being obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 70MRCK24-EC, classified as active, provides ongoing availability for replacement stock and new system designs.

Q: Are there compliance differences between these components?

A: Both components share REACH Unaffected and EAR99 classifications. The 70MRCK24-EC is RoHS non-compliant, whereas the PB-24SM-B status is not specified. Applications requiring RoHS compliance must account for this distinction.

Q: Does the different manufacturer (Sensata-Crydom vs. Grayhill Inc.) affect substitution validity?

A: No. Substitution validity is determined by functional and mechanical parameter matching, not manufacturer identity. The 70MRCK24-EC meets all critical parameters for direct substitution.

Q: What packaging format is the 70MRCK24-EC supplied in?

A: The 70MRCK24-EC is supplied in bulk packaging, differing from the PB-24SM-B packaging specification. Verify packaging requirements for your procurement and handling procedures.