Sensata-Crydom 6401A AC Output Module - Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom 6401A is an AC output module designed for 5VDC control applications with 24–280VAC output capability at 3A current rating. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, redesign, and procurement planning. The module features hold-down screw mounting and operates with 1/2 cycle switching response times.

Substiute Parts

6401A

Sensata-CrydomIn Stock: 11356401A Datasheet

Current PartRFQ

OAC5

Opto 22In Stock: 1021OAC5 Datasheet

DirectRFQ

OAC-5

TE Connectivity Potter & Brumfield RelaysIn Stock: 869OAC-5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 6401A is determined by the following critical parameters:

• Input voltage: 5VDC control signal
• Output current capacity: 3A minimum
• Output voltage range compatibility: Must support at least the primary operating range
• Switching response time: 1/2 cycle or faster
• Physical mounting: Hold-down screw compatibility
• Regulatory compliance: REACH and ECCN alignment

Two substitute parts meet these criteria with varying output voltage ranges and compliance profiles. The Opto 22 OAC5 provides a narrower output voltage window (12–140VAC) suitable for standard AC line applications. The TE Connectivity OAC-5 offers an intermediate range (12–120VAC) with active product status and full RoHS3 compliance, making it the primary recommendation for new designs and long-term availability.

Parameter Comparison

Engineering Selection Recommendations

For applications operating within the 12–120VAC output range, the TE Connectivity OAC-5 is the primary substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. It carries RoHS3 compliance and meets all critical electrical parameters of the original 6401A, with documented switching times of 8.33ms per cycle.

The Opto 22 OAC5 serves as an alternative for applications requiring extended output voltage capability up to 140VAC. This part is also active and RoHS3 compliant, though input current specification (12 mA) is lower than the TE Connectivity option.

Selection between these two substitutes depends on the specific output voltage requirements of the target application. Applications limited to standard AC line voltages (120VAC or lower) should prioritize the TE Connectivity OAC-5 due to its manufacturer recommendation status and REACH compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the OAC-5 or OAC5 directly replace the 6401A in existing designs?

A: Both substitutes maintain the same 5VDC input, 3A output current, and hold-down screw mounting. However, output voltage range differences must be verified against application requirements. The 6401A supports 24–280VAC output, while substitutes support narrower ranges (OAC-5: 12–120VAC; OAC5: 12–140VAC). Applications operating above 140VAC output cannot use these substitutes.

Q: What is the significance of the switching time difference?

A: The 6401A specifies 1/2 cycle switching response. The TE Connectivity OAC-5 provides 8.33ms switching times, which equals 1/2 cycle at 60Hz standard frequency. This ensures functional equivalence for standard AC line applications. The Opto 22 OAC5 does not specify switching times in the provided data.

Q: Are there packaging or mounting compatibility concerns?

A: All three parts feature hold-down screw mounting. The TE Connectivity OAC-5 is supplied in tray packaging. Verify mechanical dimensions and PCB footprint compatibility with the original 6401A before final selection.

Q: Which substitute is recommended for new product designs?

A: The TE Connectivity OAC-5 is recommended for new designs due to active product status, RoHS3 compliance, and documented electrical specifications. This ensures compliance with current environmental regulations and supply chain continuity.

Q: How do input current specifications affect circuit design?

A: The 6401A input current is not specified. Substitute parts require 12 mA (OAC5) or 20 mA (OAC-5) from the 5VDC control source. Verify that the control circuit can supply these currents without exceeding source limitations.