C4IDCB DC Input Module Equivalent & Substitute Parts

Part Overview

The C4IDCB is a DC input module manufactured by Sensata-Crydom, designed to interface low-voltage DC signals in the 4–16VDC range with output capability up to 30VDC at 25mA. This module features status LED indication and hold-down screw mounting. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar DC input conditioning.

Substiute Parts

C4IDCB

Sensata-CrydomIn Stock: 723C4IDCB Datasheet

Current PartRFQ

70G-IDC5B

Grayhill Inc.In Stock: 102570G-IDC5B Datasheet

MFR RecommendedRFQ

70G-IDC5B

Grayhill Inc.In Stock: 102570G-IDC5B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C4IDCB is determined by functional equivalence in DC input signal conditioning. The critical parameters governing substitution are:

• Input voltage range compatibility (minimum 4VDC, maximum 16VDC operation)
• Output voltage range (minimum 4.5VDC, maximum 30VDC capability)
• Output current capacity (minimum 25mA)
• Response time characteristics (turn-on and turn-off timing)
• Physical mounting compatibility (hold-down screw provision)
• Status indication capability (LED feedback)

The 70G-IDC5B from Grayhill Inc. qualifies as a substitute based on overlapping input/output voltage ranges, equivalent current handling, comparable switching times, and identical mechanical and functional features.

Parameter Comparison

Engineering Selection Recommendations

The 70G-IDC5B is an active product from Grayhill Inc. with current manufacturing support, addressing the obsolescence of the C4IDCB. Both modules share identical switching response times and mechanical mounting provisions. The 70G-IDC5B accepts a broader input voltage range (3–32VDC versus 4–16VDC), providing design flexibility for systems operating at the lower boundary of the C4IDCB specification. Output current capacity of the 70G-IDC5B (18mA) is lower than the C4IDCB (25mA); applications requiring the full 25mA output current must be evaluated against actual load requirements. Both modules maintain REACH compliance status and equivalent MSL ratings.

Frequently Asked Questions (FAQ)

Q: Can the 70G-IDC5B directly replace the C4IDCB in existing designs?

A: Direct replacement is possible when output current requirements do not exceed 18mA. The 70G-IDC5B's broader input voltage range (3–32VDC) encompasses the C4IDCB operating window (4–16VDC). Mechanical mounting compatibility is maintained through identical hold-down screw provisions. Verify actual load current draw before substitution.

Q: What is the primary difference in output specifications?

A: The C4IDCB provides variable output voltage (4.5–30VDC) at 25mA, while the 70G-IDC5B delivers fixed 5VDC output at 18mA. Applications requiring variable output voltage or currents exceeding 18mA cannot use the 70G-IDC5B as a substitute.

Q: Are there compliance or regulatory differences between these modules?

A: Both modules are REACH Unaffected and maintain MSL 1 (Unlimited) moisture sensitivity ratings. The 70G-IDC5B is RoHS non-compliant, whereas the C4IDCB compliance status is not specified in available data. Regulatory requirements for your application must be confirmed independently.

Q: What are the switching time implications of substitution?

A: Turn-on time is identical at 0.05ms. Turn-off time of the 70G-IDC5B (0.075ms) is faster than the C4IDCB (0.10ms), which is advantageous for applications sensitive to signal release timing.

Q: How does the input current specification affect system design?

A: The C4IDCB draws 40mA input current, while the 70G-IDC5B draws 18mA. Lower input current of the substitute reduces source loading and power consumption, benefiting battery-powered or current-limited supply applications.