120PSB Incandescent Lamp T-2 Telephone Slide Base Equivalent & Substitute Parts

Part Overview

The 120PSB is an incandescent lamp manufactured by Visual Communications Company (VCC) designed for telephone slide applications. This component is a T-2 form factor lamp with a telephone slide base type 5 standard configuration, rated for 120V operation with 1200 MSCP output. The part carries an obsolete product status, indicating it is no longer in active production. Identification of equivalent substitute parts is necessary for system maintenance, repair, and continued operational support where original components are unavailable or inventory is depleted.

Substiute Parts

120PSB

Visual Communications Company - VCCIn Stock: 1183120PSB Datasheet

Current PartRFQ

120PSB-

Visual Communications Company - VCCIn Stock: 21309120PSB- Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 120PSB is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage Rating: 120V
• Lens Size: T-2
• Lens Style: Round with Flat Top
• Color: Clear
• Lead Style: Telephone Slide Base Type 5 Standard
• MSCP Output: 1200
• Product Type: Incandescent

The substitute part 120PSB- meets all mandatory matching parameters and is therefore classified as a direct equivalent. Both parts share identical electrical and mechanical specifications, ensuring functional interchangeability within telephone slide lamp applications.

Parameter Comparison

Engineering Selection Recommendations

The 120PSB- serves as a direct functional equivalent to the 120PSB. Both components are manufactured by VCC and maintain identical electrical specifications (120V, 1200 MSCP) and mechanical form factors (T-2 round with flat top, telephone slide base type 5 standard).

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component applications. MSL rating of 1 (unlimited) indicates no moisture sensitivity constraints during storage or handling.

Product Status Context: The main part 120PSB carries obsolete status, while the substitute 120PSB- is designated not for new designs. Both designations reflect legacy product positioning. The substitute part offers higher current inventory availability (21,242 pcs vs. 1,074 pcs), providing improved sourcing reliability for maintenance and repair applications.

Packaging Advantage: The substitute part 120PSB- is supplied in box packaging, whereas the main part packaging specification is not defined. This provides standardized handling and storage conditions for the substitute option.

Frequently Asked Questions (FAQ)

Q: Can 120PSB- be used as a direct replacement for 120PSB?

A: Yes. Both parts are manufactured by VCC and share identical electrical ratings (120V, 1200 MSCP), lens specifications (T-2 round with flat top, clear color), and lead configuration (telephone slide base type 5 standard). They are functionally equivalent for telephone slide lamp applications.

Q: What is the difference between the two part numbers?

A: The primary differences are product status designation and packaging specification. The 120PSB is marked obsolete, while 120PSB- is designated not for new designs. The substitute includes defined box packaging. All electrical and mechanical parameters are identical.

Q: Are there inventory differences between these parts?

A: Yes. The 120PSB- substitute has significantly higher inventory availability (21,242 pcs) compared to the main part (1,074 pcs), making it the preferred sourcing option for immediate procurement needs.

Q: Do both parts meet current compliance standards?

A: Both parts are ROHS3 compliant and REACH unaffected. MSL rating of 1 (unlimited) applies to both, indicating no moisture sensitivity restrictions. Both meet the specified regulatory requirements.

Q: Is the telephone slide base type 5 standard configuration identical on both parts?

A: Yes. Both the 120PSB and 120PSB- utilize the same telephone slide base type 5 standard lead style, ensuring mechanical compatibility in existing socket and fixture applications.

Q: What is the MSCP specification and is it identical?

A: MSCP (Mean Spherical Candle Power) measures luminous intensity. Both parts are rated at 1200 MSCP, ensuring identical light output characteristics for optical system applications.