PB-16C4H I/O Module Rack 16 Channel Equivalent & Substitute Parts

Part Overview

The PB-16C4H is a 16-channel I/O module rack manufactured by Sensata-Crydom, designed for industrial control and signal distribution applications. This component features header and screw terminal block connectors with standoff mounting. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications.

Substiute Parts

PB-16C4H

Sensata-CrydomIn Stock: 973PB-16C4H Datasheet

Current PartRFQ

PB-24C4

Sensata TechnologiesIn Stock: 767PB-24C4 Datasheet

SimilarRFQ

70GRCK16-HL

Grayhill Inc.In Stock: 82370GRCK16-HL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PB-16C4H are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Number of Channels: 16 channels (exact match required for direct replacement)
• Connector Type: Header and Screw Terminal Blocks (interface compatibility)
• Mounting Type: Standoffs (mechanical fit in existing installations)
• Moisture Sensitivity Level: MSL 1 (Unlimited) (environmental tolerance equivalence)
• ECCN Classification: EAR99 (regulatory consistency)

Acceptable Variation:

• Manufacturer: Different manufacturers permitted if electrical and mechanical parameters align
• Series designation: May differ (PB series vs. System 50 series)
• Product Status: Active products preferred for long-term availability

The substitute 70GRCK16-HL matches all primary criteria with 16 channels, identical connector and mounting specifications, and equivalent MSL rating. The PB-24C4 provides an alternative with increased channel capacity (24 channels) for applications requiring expanded I/O capability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (16-Channel Requirement):

The 70GRCK16-HL from Grayhill Inc. provides the most direct functional equivalent to the PB-16C4H. Both components maintain identical channel count (16), connector configuration, mounting methodology, and environmental tolerance ratings. The 70GRCK16-HL is currently in active production status, ensuring availability for procurement and future support. REACH compliance status is equivalent between both parts.

For Expanded Capacity Applications:

The PB-24C4 from Sensata Technologies offers an alternative within the same manufacturer family, providing increased channel capacity (24 channels) while maintaining compatible connector and mounting specifications. This substitute is suitable for applications where additional I/O capacity can be accommodated within the system design. The PB-24C4 carries active product status and RoHS compliance certification.

Regulatory and Compliance Considerations:

All three components share EAR99 ECCN classification and MSL 1 rating, indicating consistent regulatory treatment and environmental tolerance. The PB-24C4 provides RoHS compliance advantage for applications subject to RoHS requirements. The 70GRCK16-HL maintains REACH Unaffected status matching the original component.

Frequently Asked Questions (FAQ)

Q: Can the PB-24C4 be used as a direct replacement for the PB-16C4H?

A: The PB-24C4 is functionally compatible but provides 24 channels instead of 16. Direct substitution is possible only if the system design accommodates the additional channels and the increased physical footprint. Connector type and mounting method are identical.

Q: What is the primary advantage of the 70GRCK16-HL substitute?

A: The 70GRCK16-HL maintains exact channel count parity (16 channels) with the PB-16C4H while offering active product status and current manufacturing availability. All critical electrical and mechanical parameters align with the original component.

Q: Are there compatibility concerns between Sensata-Crydom and Grayhill components?

A: No compatibility concerns exist at the parameter level specified. Both manufacturers provide identical connector types (Header, Screw Terminal Blocks), mounting methodology (Standoffs), and environmental ratings (MSL 1). Compatibility is determined by these standardized interface specifications.

Q: Does the RoHS compliance difference between substitutes affect selection?

A: RoHS compliance status should be evaluated against system requirements. The PB-24C4 is RoHS compliant, while the 70GRCK16-HL is RoHS non-compliant. Selection depends on whether the application or end-market mandates RoHS compliance.

Q: What inventory status should influence purchasing decisions?

A: Both active substitutes (PB-24C4: 742 units; 70GRCK16-HL: 785 units) maintain adequate stock levels. The original PB-16C4H (947 units) remains available despite obsolete classification. Procurement should prioritize active-status components for long-term supply chain stability.

Q: Are there differences in HTSUS classification between parts?

A: Yes. HTSUS codes differ: PB-16C4H (8534.00.0040), PB-24C4 (8543.70.9860), and 70GRCK16-HL (8538.90.8180). These differences reflect tariff classification variations and may impact import duties depending on origin and destination markets.