Grayhill 70-IDC5 DC Input Module: Equivalent & Substitute Parts

Part Overview

The Grayhill 70-IDC5 is an active DC input module designed to convert and isolate DC supply voltages in the 3–32VDC range to a standardized 5VDC output at 10mA. This module is commonly used in industrial control systems, programmable logic controllers (PLCs), and signal conditioning applications where galvanic isolation and voltage level conversion are required. The 70-IDC5 maintains Active product status with full inventory availability. Substitute parts may be required due to supply constraints, packaging preferences, or application-specific compliance requirements.

Substiute Parts

70-IDC5

Grayhill Inc.In Stock: 108170-IDC5 Datasheet

Current PartRFQ

IDC5

Sensata-CrydomIn Stock: 2236IDC5 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of DC input modules is determined by functional equivalence across the following critical parameters:

Output Voltage and Current: Both the main part and substitute must deliver 5VDC output. The substitute IDC5 provides 16mA output capacity, which exceeds the 10mA requirement of the 70-IDC5, ensuring compatibility with applications requiring the standard 5VDC logic level.

Input Voltage Compatibility: The 70-IDC5 accepts 3–32VDC input. The Sensata-Crydom IDC5 substitute is rated for 24VDC input only. This represents a narrower input range and is suitable only for applications where the supply voltage is fixed at or near 24VDC.

Switching Performance: The 70-IDC5 specifies turn-on and turn-off times of 0.20ms and 0.40ms respectively. The IDC5 substitute specifies 1ms for both parameters. This difference may affect applications with strict timing requirements.

Packaging and Physical Form: The 70-IDC5 is supplied in Bulk packaging, while the IDC5 substitute is supplied in Tray packaging. This affects handling, storage, and integration into automated assembly processes.

Compliance and Environmental: The 70-IDC5 is RoHS non-compliant. The IDC5 substitute is ROHS3 compliant, making it suitable for applications subject to RoHS directives.

Parameter Comparison

Engineering Selection Recommendations

For applications with fixed 24VDC supply and RoHS3 compliance requirement: The Sensata-Crydom IDC5 is a direct functional substitute. The narrower input voltage range is not a limitation when supply voltage is regulated at 24VDC. The higher output current capacity (16mA vs. 10mA) provides additional margin. RoHS3 compliance makes this part suitable for regulated markets and OEM applications subject to environmental directives.

For applications requiring wide input voltage range (3–32VDC): The Grayhill 70-IDC5 remains the only suitable option among the provided parts. The Sensata-Crydom IDC5 cannot operate below 24VDC and is not a valid substitute for variable or low-voltage supply scenarios.

For applications with strict timing requirements: The Grayhill 70-IDC5 offers faster switching performance (0.20ms turn-on, 0.40ms turn-off) compared to the IDC5 substitute (1ms both directions). Applications requiring response times below 1ms must use the 70-IDC5.

For RoHS non-compliant legacy systems: The Grayhill 70-IDC5 maintains its non-compliant status and is appropriate for existing designs where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can the Sensata-Crydom IDC5 replace the Grayhill 70-IDC5 in all applications?

A: No. The IDC5 substitute is limited to 24VDC input and cannot operate across the full 3–32VDC range of the 70-IDC5. Substitution is valid only for applications with fixed 24VDC supply voltage.

Q: What is the impact of the higher input current draw (34mA vs. 18mA) in the IDC5 substitute?

A: The substitute draws 1.89 times more input current. This increases power dissipation and may require larger supply capacity or additional thermal management in current-limited applications. Verify that the power supply can sustain the higher input current without voltage sag.

Q: Does the slower switching time of the IDC5 (1ms vs. 0.20ms turn-on) affect compatibility?

A: Yes, for time-critical applications. If the system requires response times faster than 1ms, the IDC5 substitute is not suitable. The 70-IDC5 must be used.

Q: Are there packaging implications when switching from Bulk (70-IDC5) to Tray (IDC5)?

A: Yes. Bulk packaging requires manual handling and counting, while Tray packaging is optimized for automated pick-and-place assembly. Tray packaging may reduce assembly costs but requires compatible handling equipment. Verify that your assembly process supports tray-packaged components.

Q: Is the RoHS3 compliance of the IDC5 substitute a requirement for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and for many OEM supply chains. If your application or market requires RoHS compliance, the IDC5 substitute is preferable. If RoHS compliance is not required, either part is acceptable from a regulatory standpoint.

Q: Can I use the IDC5 substitute in a design originally specified for the 70-IDC5?

A: Only if all of the following conditions are met: (1) the supply voltage is fixed at 24VDC, (2) the application does not require switching times faster than 1ms, (3) the power supply can deliver 34mA input current, and (4) RoHS3 compliance is either required or acceptable. If any condition is not met, the 70-IDC5 must be used.