CM1683 Incandescent Lamp Equivalent & Substitute Parts

Part Overview

The CM1683 is an incandescent lamp manufactured by Visual Communications Company (VCC) designed for 28V applications. It features a clear lens with round domed top configuration and RS-8 bayonet single-contact base. The lamp delivers 32 MSCP (Mean Spherical Candle Power) output suitable for indicator and illumination applications requiring this specific voltage and optical geometry.

The CM1683 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and maintenance applications.

Substiute Parts

CM1683

Visual Communications Company - VCCIn Stock: 1060CM1683 Datasheet

Current PartRFQ

1683

CEC IndustriesIn Stock: 10551683 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CM1683 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Voltage Rating: 28V
• MSCP Output: 32
• Lead Style: Bayonet - Single Contact
• Lens Size: RS-8 or equivalent S-8 designation
• Color: Clear
• Type: Incandescent

The CEC Industries part number 1683 qualifies as a direct substitute. Both the main part and substitute maintain identical voltage rating (28V), identical MSCP output (32), identical lead style (Bayonet - Single Contact), and equivalent lens size designation (S-8 corresponds to RS-8 standard). Both are clear incandescent lamps designed for the same electrical and optical performance envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CEC Industries 1683

The CEC Industries part number 1683 is the qualified substitute for the obsolete CM1683. Selection is based on the following engineering criteria:

Electrical Compatibility: Both parts operate at 28V with identical 32 MSCP output, ensuring equivalent brightness and power consumption in the target circuit.

Mechanical Compatibility: Both parts use bayonet single-contact base configuration (BA15S standard). The S-8 lens size designation used by CEC Industries is the industry-standard equivalent to the RS-8 designation used by VCC, ensuring identical optical geometry and mounting compatibility.

Compliance Status: The CEC Industries substitute maintains RoHS compliance and EAR99 export classification, matching the regulatory profile of the original part. The substitute is currently in active production status, ensuring long-term availability for procurement and replacement applications.

Inventory Availability: The CEC Industries 1683 is available with 1025 pieces in stock, providing immediate procurement capability for the obsolete CM1683.

Frequently Asked Questions (FAQ)

Q: Can the CEC Industries 1683 be used as a direct replacement for the CM1683 in existing applications?

A: Yes. Both parts meet identical electrical specifications (28V, 32 MSCP), use the same bayonet single-contact base, and provide equivalent optical output. The S-8 and RS-8 lens size designations are equivalent standards for incandescent lamps.

Q: What is the difference between RS-8 and S-8 lens size designations?

A: RS-8 and S-8 are equivalent designations for the same physical lens size in incandescent lamp standards. Both refer to a round lens with domed top configuration. The different nomenclature reflects manufacturer convention rather than physical difference.

Q: Why is the CM1683 listed as obsolete?

A: The CM1683 is no longer in active production by Visual Communications Company. The CEC Industries 1683 provides equivalent functionality and is currently manufactured, making it the appropriate substitute for new procurement and replacement applications.

Q: Are there any compliance differences between the CM1683 and the CEC Industries 1683?

A: Both parts are RoHS compliant and classified under ECCN EAR99. The CEC Industries substitute maintains the same regulatory compliance profile as the original part.

Q: What packaging format is the CEC Industries 1683 supplied in?

A: The CEC Industries 1683 is supplied in boxes of 10 units per the product description.

Q: Can I mix CM1683 and CEC Industries 1683 lamps in the same application?

A: Yes. Both lamps have identical electrical and optical specifications, allowing them to be used interchangeably in the same circuit or fixture without performance degradation.