C4IAC AC Input Module 120V Equivalent & Substitute Parts

Part Overview

The C4IAC is an AC input module manufactured by Sensata-Crydom, designed to convert 120VAC input signals to 4.5–30VDC output levels. This module is classified as an active product and is RoHS compliant. AC input modules serve as signal conditioning and isolation components in industrial control systems, programmable logic controllers (PLCs), and automation equipment. Substitute parts may be required due to inventory constraints, end-of-life considerations, or specific application requirements that align with alternative electrical and mechanical specifications.

Substiute Parts

C4IAC

Sensata-CrydomIn Stock: 991C4IAC Datasheet

Current PartRFQ

70G-IAC5

Grayhill Inc.In Stock: 87770G-IAC5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for AC input modules is determined by the following critical parameters:

• Input Voltage: Must match 120VAC specification
• Input Current: Acceptable range based on circuit design tolerance
• Output Voltage Range: Must be compatible with downstream logic circuits
• Output Current: Must meet or exceed application load requirements
• Switching Time: Turn-on and turn-off times must not exceed system timing constraints
• Physical Features: Hold-down screw and status LED presence ensures mechanical and operational compatibility
• Packaging: Bulk packaging compatibility

The substitute part 70G-IAC5 (Grayhill Inc.) shares the same 120VAC input specification and identical switching times (20 ms on/off). However, differences exist in output voltage range (5VDC fixed versus 4.5–30VDC adjustable) and output current capacity (10 mA versus 25 mA), which may limit its applicability to specific circuit configurations.

Parameter Comparison

Engineering Selection Recommendations

C4IAC (Sensata-Crydom) is the primary selection for applications requiring RoHS compliance and flexible output voltage adjustment (4.5–30VDC range). The higher output current capacity (25 mA) accommodates applications with greater downstream load requirements.

70G-IAC5 (Grayhill Inc.) is suitable only for applications where the fixed 5VDC output and reduced output current (10 mA) are acceptable, and where RoHS non-compliance does not violate regulatory or procurement requirements. The lower input current draw (8 mA versus 14 mA) may provide marginal benefits in power-constrained systems.

Both modules share identical switching characteristics (20 ms) and feature sets, ensuring mechanical compatibility in standard DIN-rail or panel-mount configurations.

Frequently Asked Questions (FAQ)

Q: Can the 70G-IAC5 directly replace the C4IAC in all applications?

A: No. The 70G-IAC5 has a fixed 5VDC output and lower current capacity (10 mA). It is compatible only with applications designed for these specifications. The C4IAC's adjustable output range (4.5–30VDC) and higher current (25 mA) provide greater flexibility.

Q: What is the impact of RoHS compliance differences?

A: The C4IAC is RoHS compliant, meeting EU Directive 2011/65/EU restrictions on hazardous substances. The 70G-IAC5 is RoHS non-compliant. Selection depends on end-market requirements and regulatory obligations.

Q: Are the switching times identical?

A: Yes. Both modules have 20 ms turn-on and turn-off times, ensuring equivalent timing performance in control circuits.

Q: Do both modules support the same packaging and mounting?

A: Both are supplied in bulk packaging with hold-down screws and status LEDs, ensuring compatibility with standard industrial control panel configurations.

Q: What is the significance of input current differences (14 mA vs. 8 mA)?

A: The lower input current of the 70G-IAC5 may reduce power consumption in the AC supply circuit. However, this difference is typically negligible in industrial applications and should not be the primary selection criterion.