GF550 Equivalent & Substitute Parts

Part Overview

The GF550 is an incandescent lamp designed for 6V applications with a 6mm T-2 form factor and 3AG fuse lead configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and component procurement. The GF550 delivers 0.4 MSCP (Mean Spherical Candle Power) in a clear lens configuration and is suitable for applications requiring low-voltage indicator lighting or signal functions.

Substiute Parts

GF550

JKL Components Corp.In Stock: 715GF550 Datasheet

Current PartRFQ

GF570

JKL Components Corp.In Stock: 954GF570 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GF550 is determined by the following critical parameters:

• Voltage Rating: The substitute must operate at a compatible voltage. The GF550 operates at 6V nominal.
• Lens Size and Style: Physical form factor must remain 6mm, T-2 round configuration to ensure mechanical fit in existing sockets.
• Lead Style: The 3AG fuse lead configuration must be maintained for electrical connection compatibility.
• Type: Incandescent lamp technology is retained across substitutes.
• Color: Clear lens specification is maintained.

The GF570 qualifies as a substitute based on matching mechanical form factor (6mm T-2 round), identical lead style (3AG fuse), identical lens color (clear), and compatible voltage operation within the low-voltage incandescent lamp category. The GF570 operates at 6.3V, which represents a minor voltage elevation suitable for applications with voltage tolerance specifications.

Parameter Comparison

Engineering Selection Recommendations

The GF570 is the designated manufacturer-recommended substitute for the obsolete GF550. Both components share identical mechanical and electrical interface specifications (6mm T-2 round lens, 3AG fuse leads, clear color). The GF570 is classified as active product status, ensuring ongoing availability and supply chain continuity.

The GF570 operates at 6.3V compared to the GF550's 6V rating, representing a 5% voltage increase. This voltage differential is within standard tolerance ranges for incandescent lamp applications and does not preclude substitution in circuits designed for 6V operation with standard component tolerances.

The GF570 delivers increased luminous output (0.64 MSCP versus 0.4 MSCP), providing enhanced brightness in indicator or signal applications. Both components maintain identical moisture sensitivity classification and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Can the GF570 be used as a direct replacement for the GF550 in existing designs?

A: Yes. The GF570 maintains identical mechanical form factor (6mm T-2 round), lead configuration (3AG fuse), and lens color (clear). The 6.3V rating is compatible with 6V circuit designs operating within standard component tolerance specifications.

Q: What is the significance of the voltage difference between GF550 (6V) and GF570 (6.3V)?

A: The 0.3V difference represents approximately 5% voltage elevation. Incandescent lamps operate across voltage ranges with standard tolerance specifications. This voltage differential does not prevent substitution in applications designed for 6V operation.

Q: Why does the GF570 have higher MSCP (0.64) compared to the GF550 (0.4)?

A: The increased luminous output is a characteristic of the GF570 design. This results in brighter illumination in indicator or signal applications. Applications requiring specific brightness levels should evaluate this parameter against design requirements.

Q: Are there packaging differences between GF550 and GF570?

A: The GF550 is supplied in standard packaging, while the GF570 is supplied in bulk packaging. Both components are identical in form factor and electrical specifications. Packaging selection depends on procurement volume and inventory management requirements.

Q: What is the product status significance?

A: The GF550 is classified as obsolete, indicating discontinued manufacturing. The GF570 is classified as active, ensuring continued availability from the manufacturer. Substitution to the GF570 provides long-term supply chain security.