Equivalent & Substitute Parts: 334-10PK

Part Overview

The 334-10PK is an incandescent lamp manufactured by Visual Communications Company (VCC), designed for 28V applications with a clear lens and round domed top configuration. This component is classified as a discontinued product at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system support and component procurement.

The 334-10PK serves as a general-purpose indicator lamp in 28V electrical systems, providing 0.34 MSCP (Mean Spherical Candle Power) output. Due to its discontinued status, equivalent substitutes must be evaluated based on electrical performance, mechanical compatibility, and regulatory compliance.

Key Parameters

Parameter	Value	Significance for Substitution
Voltage Rating	28V	Critical electrical parameter; substitute must match exactly
MSCP (Mean Spherical Candle Power)	0.34	Luminous intensity specification; determines brightness equivalence
Lens Style	Round with Domed Top	Optical and mechanical form factor
Lens Size	RT-1 3/4	Physical dimensions; affects mechanical fit
Lead Style	Midget Groove	Electrical connection interface; must be compatible with socket
Lamp Type	Incandescent	Technology classification
Color	Clear	Optical transmission characteristic
RoHS Status	ROHS3 Compliant	Regulatory compliance requirement

Substitute Part Grouping Explanation

Substitution of the 334-10PK is based on the following critical parameters that must remain constant or equivalent:

Electrical Parameters:

Voltage Rating: 28V (exact match required)
MSCP: 0.34 (luminous intensity specification)

Mechanical Parameters:

Lead Style: Midget Groove (socket compatibility)
Lens Size: RT-1 3/4 or T-1.75 equivalent (physical form factor)
Lens Style: Round with Domed Top (optical configuration)

Regulatory Parameters:

RoHS Compliance: ROHS3 Compliant
ECCN Classification: EAR99

The substitute part CEC Industries 334 meets these criteria through matching voltage rating, luminous intensity, lead style, and regulatory compliance. The lens designation T-1.75 with S5-7 base is mechanically and electrically equivalent to the RT-1 3/4 Midget Groove configuration.

Parameter Comparison

Parameter	334-10PK (VCC)	334 (CEC Industries)	Compatibility Status
Manufacturer	Visual Communications Company	CEC Industries	Different manufacturer
Voltage Rating	28V	28V	Equivalent
MSCP	0.34	0.34	Equivalent
Lens Style	Round with Domed Top	T-1.75 (Round configuration)	Equivalent
Lens Size	RT-1 3/4	T-1.75 / Base: S5-7	Equivalent
Lead Style	Midget Groove	Midget Groove	Equivalent
Lamp Type	Incandescent	Incandescent	Equivalent
Color	Clear	Not specified in data	Assumed equivalent
Product Status	Discontinued at DiGi Electronics	Active	Substitute is active
RoHS Status	ROHS3 Compliant	Not specified in data	Compliance status not provided
ECCN	EAR99	EAR99	Equivalent

Engineering Selection Recommendations

Primary Substitute: CEC Industries 334

The CEC Industries 334 is the direct equivalent substitute for the discontinued 334-10PK. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components operate at 28V with identical 0.34 MSCP luminous intensity, ensuring functional performance parity in 28V indicator lamp applications.
Mechanical Compatibility: The T-1.75 lens size with S5-7 Midget Groove base is mechanically and electrically compatible with the original RT-1 3/4 Midget Groove configuration, permitting direct socket installation.
Product Status: The CEC Industries 334 maintains active product status with 862 pieces in stock, providing reliable procurement availability compared to the discontinued VCC 334-10PK.
Regulatory Compliance: Both components share EAR99 ECCN classification. The substitute maintains equivalent export control status.
Packaging Consideration: The CEC Industries 334 is supplied as a box of 10 units, whereas the VCC 334-10PK designation indicates a 10-pack configuration. Procurement quantities should account for this packaging structure.

Frequently Asked Questions (FAQ)

Q: Can the CEC Industries 334 be used as a direct replacement for the VCC 334-10PK?

A: Yes. Both components share identical voltage rating (28V), luminous intensity (0.34 MSCP), and lead style (Midget Groove). The T-1.75 lens designation is mechanically equivalent to the RT-1 3/4 specification, permitting direct substitution in 28V indicator lamp circuits.

Q: What is the difference between RT-1 3/4 and T-1.75 lens designations?

A: RT-1 3/4 and T-1.75 are equivalent designations for the same physical lens size. Both represent a 1.75-inch diameter round lamp with domed top configuration. The different nomenclature reflects manufacturer naming conventions rather than physical differences.

Q: Are there any compliance differences between the two parts?

A: Both components are classified as EAR99 for export control purposes. The VCC 334-10PK is ROHS3 compliant. RoHS compliance status for the CEC Industries 334 is not specified in the provided data.

Q: What is the significance of the Midget Groove lead style?

A: Midget Groove is a standardized electrical connection interface for incandescent lamps. It ensures compatibility with corresponding lamp sockets. Both the original and substitute parts use this lead style, guaranteeing socket compatibility.

Q: Does the packaging format affect technical performance?

A: No. The packaging format (10-pack box) does not affect electrical or optical performance. Packaging differences are procurement and logistics considerations only.

Q: What is MSCP and why is it important for substitution?

A: MSCP (Mean Spherical Candle Power) is the luminous intensity measurement in candlepower units. It specifies the brightness output of the lamp. Both parts provide 0.34 MSCP, ensuring equivalent illumination performance in the application circuit.

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