OAC15A AC Output Module Equivalent & Substitute Parts

Part Overview

The OAC15A is an AC output module manufactured by Sensata Technologies, designed to switch AC loads up to 3A at voltages ranging from 24 to 280VAC, with a 15VDC supply input. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, redesign, and procurement planning. Substitute parts must maintain compatibility across input voltage, output voltage range, current capacity, and switching characteristics to ensure reliable operation in existing or new applications.

Substiute Parts

OAC15A

Sensata TechnologiesIn Stock: 931OAC15A Datasheet

Current PartRFQ

70-OAC15A

Grayhill Inc.In Stock: 105970-OAC15A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OAC15A is determined by the following critical parameters:

• Input Supply Voltage: Must be 15VDC to maintain compatibility with existing power supply circuits
• Output Voltage Range: Must support 24 ~ 280VAC to cover the full operating range of connected AC loads
• Output Current Capacity: Must be rated for at least 3A continuous output current
• Switching Characteristics: Turn-on and turn-off times must be compatible with system timing requirements
• Physical Features: Hold-down screw mounting must be present for mechanical compatibility
• Package Type: Must accommodate existing PCB or panel mounting configurations

The 70-OAC15A from Grayhill Inc. meets these substitution criteria with equivalent input voltage (15VDC), identical output voltage range (24 ~ 280VAC), and enhanced output current capacity (4.6A), providing direct functional replacement capability.

Parameter Comparison

Engineering Selection Recommendations

The 70-OAC15A from Grayhill Inc. is the qualified substitute for the obsolete OAC15A. Selection is based on the following engineering factors:

• Functional Equivalence: Identical input voltage requirement (15VDC) and output voltage range (24 ~ 280VAC) ensure direct circuit compatibility without modification
• Enhanced Performance: Output current rating of 4.6A exceeds the original 3A specification, providing additional design margin for AC load switching applications
• Active Production Status: The 70-OAC15A is in active production, ensuring long-term availability and supply chain reliability compared to the obsolete OAC15A
• Compliance Certification: Both parts carry REACH Unaffected and EAR99 ECCN classifications, maintaining regulatory compliance in equivalent applications
• Switching Timing: The 8.33ms switching times (equivalent to 1/2 cycle at 60Hz) preserve system timing behavior for AC switching control

The 70-OAC15A is suitable for direct replacement in applications where the OAC15A is no longer available, with the understanding that the lower input current requirement (9 mA vs. 20 mA) may reduce power supply loading.

Frequently Asked Questions (FAQ)

Q: Can the 70-OAC15A directly replace the OAC15A without circuit modifications?

A: Yes. Both modules share identical input voltage (15VDC) and output voltage range (24 ~ 280VAC) specifications. The hold-down screw mounting feature is present on both parts, enabling direct mechanical and electrical substitution in existing designs.

Q: What is the significance of the higher output current rating on the 70-OAC15A (4.6A vs. 3A)?

A: The 70-OAC15A's 4.6A rating provides additional current capacity beyond the original 3A specification. This allows the substitute to handle AC loads up to 4.6A without derating, offering improved design margin. Existing applications rated for 3A operation remain fully compatible.

Q: How do the switching times compare between the two modules?

A: The OAC15A specifies 1/2 cycle switching time, while the 70-OAC15A specifies 8.33ms. At 60Hz AC frequency, 1/2 cycle equals 8.33ms, making the switching characteristics functionally equivalent. At 50Hz, the 70-OAC15A's fixed 8.33ms time represents a slightly faster response.

Q: Why is the input current lower on the 70-OAC15A (9 mA vs. 20 mA)?

A: The reduced input current requirement reflects improved internal circuit efficiency in the Grayhill design. This lower power consumption reduces loading on the 15VDC supply and generates less heat, benefiting overall system performance without affecting output switching capability.

Q: What packaging differences exist between these modules?

A: The OAC15A is supplied in standard packaging, while the 70-OAC15A is supplied in bulk packaging. Both maintain the same physical form factor with hold-down screw mounting, ensuring compatibility in existing mechanical assemblies.

Q: Are there compliance or certification differences between the OAC15A and 70-OAC15A?

A: Both modules carry identical REACH Unaffected and EAR99 ECCN classifications. The 70-OAC15A is RoHS non-compliant, while the OAC15A status is not specified. For applications requiring RoHS compliance, this difference must be evaluated against system requirements.

Q: Is the 70-OAC15A suitable for new designs, or only as a replacement for obsolete OAC15A applications?

A: The 70-OAC15A is suitable for both new designs and replacement applications. Its active production status, enhanced current capacity, and improved input current efficiency make it a viable choice for AC output switching applications requiring 15VDC input and 24 ~ 280VAC output capability.