GF740 Equivalent & Substitute Parts

Part Overview

The GF740 is an incandescent lamp designed for 12.6V applications with a 6mm T-2 form factor and 3AG fuse lead configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The GF740 delivers 0.64 MSCP (Mean Spherical Candle Power) in a clear lens configuration suitable for indicator and signaling applications.

Substiute Parts

GF740

JKL Components Corp.In Stock: 1050GF740 Datasheet

Current PartRFQ

GF780

JKL Components Corp.In Stock: 1865GF780 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The GF780 qualifies as a direct substitute based on the following critical parameters:

• Identical lens size (6mm, T-2) and round lens style
• Identical lead configuration (Fuse - 3AG)
• Identical color specification (Clear)
• Identical moisture sensitivity level (MSL 1 - Unlimited)
• Identical mechanical form factor and electrical interface

The GF780 operates at 12V nominal voltage, which is within the operational tolerance band for 12.6V-rated systems. The MSCP variance (0.7 vs. 0.64) represents a 9.4% increase in luminous intensity, acceptable for indicator lamp applications where brightness tolerance typically permits ±10-15% variation. The GF780 maintains active product status with ROHS3 compliance, providing long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The GF780 is the designated substitute for GF740 applications. Selection is based on:

• Mechanical compatibility: Identical 6mm T-2 form factor and 3AG fuse lead interface ensure direct physical fit
• Electrical compatibility: 12V nominal rating operates within standard tolerance for 12.6V circuits
• Regulatory compliance: GF780 ROHS3 certification satisfies modern procurement and environmental requirements
• Availability: Active product status ensures reliable long-term supply against the obsolete GF740
• Performance: Luminous intensity increase of 0.06 MSCP falls within acceptable tolerance for indicator lamp applications

Frequently Asked Questions (FAQ)

Q: Can GF780 directly replace GF740 in existing assemblies? A: Yes. The GF780 maintains identical mechanical form factor (6mm T-2), lens style (round clear), and lead configuration (3AG fuse). Physical installation requires no modification.

Q: What is the voltage compatibility between 12.6V and 12V ratings? A: The 0.6V difference represents a 4.8% variance from nominal 12.6V. Incandescent lamp circuits typically operate within ±10% voltage tolerance. The GF780 at 12V nominal is compatible with 12.6V-rated systems.

Q: Does the MSCP difference affect circuit performance? A: The GF780 provides 0.7 MSCP versus GF740's 0.64 MSCP, a 9.4% increase in luminous intensity. For indicator and signaling applications, this variance is within standard brightness tolerance specifications and does not require circuit redesign.

Q: What packaging is available for GF780? A: GF780 is supplied in box packaging. Verify packaging requirements against procurement specifications.

Q: Are there compliance differences between the parts? A: GF780 carries ROHS3 certification, providing regulatory alignment with current environmental standards. GF740 compliance status is not specified. GF780 is the recommended selection for new designs and long-term support.