70-OAC5A AC Output Module Equivalent & Substitute Parts

Part Overview

The 70-OAC5A is an AC output module manufactured by Grayhill Inc., designed to switch AC loads from a 5VDC control signal. This module provides 3.5A output capacity across a 24–280VAC range, making it suitable for industrial control applications requiring solid-state AC switching. The part is currently in active production status with substantial inventory availability (5115 units in stock). Identifying equivalent substitute parts becomes necessary when managing supply chain continuity, addressing component obsolescence concerns, or optimizing procurement across multiple qualified suppliers.

Substiute Parts

70-OAC5A

Grayhill Inc.In Stock: 519170-OAC5A Datasheet

Current PartRFQ

OAC5A

Sensata-CrydomIn Stock: 835OAC5A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 70-OAC5A are identified based on strict electrical and mechanical compatibility criteria. The primary substitute, OAC5A from Sensata-Crydom, qualifies as a direct equivalent because it maintains identical specifications across all critical switching parameters:

Key Substitution Criteria:

• Input voltage: 5VDC (identical)
• Output voltage range: 24–280VAC (identical)
• Output current capacity: 3.5A (identical)
• Switching times: 8.33ms turn-on and turn-off (identical)
• Mechanical feature: Hold Down Screw (identical)
• Package type: Bulk (identical)
• Product type: AC Output Module (identical)

The OAC5A substitute differs only in input current consumption (20 mA versus 16 mA) and compliance certifications, which do not affect functional interchangeability in standard applications. Both parts operate within the same electrical envelope and mechanical form factor.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: OAC5A (Sensata-Crydom)

The OAC5A qualifies as a direct functional equivalent for the 70-OAC5A based on complete electrical parameter alignment. Both parts deliver identical switching performance, output capacity, and response timing. The OAC5A is suitable for applications where the 70-OAC5A is specified, provided the following conditions are met:

1. Compliance Requirements: The OAC5A carries ROHS3 compliance certification, whereas the 70-OAC5A is RoHS non-compliant. Applications subject to RoHS regulatory requirements should prioritize the OAC5A substitute.

2. Input Current Tolerance: The OAC5A draws 20 mA input current compared to 16 mA for the 70-OAC5A. Control circuits must accommodate this 4 mA increase. In most industrial control designs, this difference is within standard design margins.

3. Moisture Sensitivity: The OAC5A carries no MSL rating, indicating reduced moisture sensitivity compared to the 70-OAC5A (MSL 1). This may provide advantages in humid storage or operational environments.

4. Inventory and Availability: The OAC5A maintains active production status with 737 units in current stock, supporting supply chain continuity.

Both parts share identical ECCN (EAR99) and HTSUS (8536.49.0055) classifications, confirming trade compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can the OAC5A replace the 70-OAC5A in existing designs without modification?

A: Yes, the OAC5A functions as a direct substitute in applications where the 70-OAC5A is currently installed. The electrical specifications—input voltage, output voltage range, output current, and switching times—are identical. The control circuit must accommodate the 4 mA higher input current draw (20 mA versus 16 mA), which is typically within standard design tolerances for 5VDC control supplies.

Q: What is the significance of the RoHS compliance difference?

A: The 70-OAC5A is RoHS non-compliant, while the OAC5A is ROHS3 compliant. If your application or end-market requires RoHS certification (common in EU markets and certain industrial sectors), the OAC5A substitute is the appropriate choice. If RoHS compliance is not a requirement, both parts are functionally equivalent.

Q: Are there any timing or performance differences between these parts?

A: No. Both the 70-OAC5A and OAC5A exhibit identical turn-on and turn-off times of 8.33 ms. Switching performance and response characteristics are equivalent.

Q: What does the "Hold Down Screw" feature indicate?

A: Both parts include a hold-down screw mechanical feature, ensuring identical mounting and mechanical compatibility. This feature secures the module to the mounting surface and is present on both the main part and substitute.

Q: How does the MSL rating difference affect part selection?

A: The 70-OAC5A carries MSL 1 (Unlimited), indicating standard moisture sensitivity. The OAC5A carries no MSL rating, suggesting reduced or negligible moisture sensitivity. For applications in high-humidity environments or with extended storage periods, the OAC5A may offer improved reliability. For standard industrial control environments, this difference is not a limiting factor.

Q: Are both parts available in the same packaging format?

A: Yes. Both the 70-OAC5A and OAC5A are supplied in Bulk packaging, ensuring identical handling, storage, and integration procedures.

Q: What trade compliance certifications apply to both parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8536.49.0055) classifications, confirming equivalent export control and tariff treatment.