DF57-3S-1.2C Equivalent & Substitute Parts

Part Overview

The DF57-3S-1.2C is a 3-position rectangular connector receptacle housing manufactured by Hirose Electric Co Ltd with a 0.047" (1.20mm) pitch. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part features a swing lock fastening mechanism, white color, and crimp contact termination for free-hanging in-line mounting applications. Contacts are not included with the housing.

Substiute Parts

DF57-3S-1.2C

Hirose Electric Co LtdIn Stock: 1145DF57-3S-1.2C Datasheet

Current PartRFQ

DF57H-3S-1.2C

Hirose Electric Co LtdIn Stock: 5766DF57H-3S-1.2C Datasheet

MFR RecommendedRFQ

0510210300

MolexIn Stock: 1182960510210300 Datasheet

MFR RecommendedRFQ

0874390300

MolexIn Stock: 2648660874390300 Datasheet

MFR RecommendedRFQ

1775441-3

TE Connectivity AMP ConnectorsIn Stock: 64801775441-3 Datasheet

MFR RecommendedRFQ

M40-1100300

Harwin Inc.In Stock: 4948M40-1100300 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DF57-3S-1.2C is determined by the following critical parameters: connector type (receptacle), contact type (female socket), number of positions (3), number of rows (1), mounting type (free hanging in-line), contact termination (crimp), and moisture sensitivity level (MSL 1).

The substitute parts are grouped into two categories based on pitch compatibility:

Category 1: Same Pitch (0.047" / 1.20mm)

• DF57H-3S-1.2C (Hirose Electric Co Ltd) — Direct equivalent with active product status

Category 2: Different Pitch (1.25mm, 1.50mm, 1.00mm)

• 0510210300 (Molex PicoBlade 51021) — 0.049" (1.25mm) pitch
• 0874390300 (Molex Pico-SPOX 87439) — 0.059" (1.50mm) pitch
• 1775441-3 (TE Connectivity HPI) — 0.059" (1.50mm) pitch
• M40-1100300 (Harwin Inc. M40) — 0.039" (1.00mm) pitch

Parts in Category 2 require mechanical redesign of the mating connector interface due to pitch variation and are not direct drop-in replacements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Pitch, No Redesign Required):

DF57H-3S-1.2C is the primary equivalent part. It maintains identical pitch (0.047" / 1.20mm), fastening mechanism (swing lock), and mounting configuration. The part is manufactured by the same supplier (Hirose Electric Co Ltd), carries active product status, and is ROHS3 compliant. Inventory availability is significantly higher (5751 pcs vs. 1052 pcs for the original part).

For Alternative Designs (Pitch Variation, Redesign Required):

Parts with different pitch specifications (0510210300, 0874390300, 1775441-3, M40-1100300) are suitable only when the mating connector interface can be redesigned. All substitute parts maintain receptacle configuration, female socket contact type, 3-position layout, and crimp termination. All carry active product status and ROHS3 compliance. Selection among these alternatives depends on operating temperature requirements, insulation material compatibility, and fastening mechanism preference for the specific application.

Frequently Asked Questions (FAQ)

Q: Can DF57H-3S-1.2C be used as a direct replacement for DF57-3S-1.2C?

A: Yes. DF57H-3S-1.2C is a direct equivalent. It maintains identical pitch (1.20mm), fastening type (swing lock), number of positions (3), and mounting configuration (free hanging in-line). Both are manufactured by Hirose Electric Co Ltd. The primary difference is product status: DF57H-3S-1.2C is active with higher inventory availability.

Q: Why do the other substitute parts have different pitch specifications?

A: The substitute parts (0510210300, 0874390300, 1775441-3, M40-1100300) represent alternative connector families from different manufacturers. Pitch variation (1.00mm, 1.25mm, 1.50mm) requires corresponding changes to the mating connector interface and PCB layout. These parts are suitable only when design modification is feasible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original DF57-3S-1.2C does not specify RoHS status due to its obsolete classification.

Q: What is the significance of MSL 1 (Unlimited) for all parts?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. All parts in this comparison share this classification, eliminating moisture sensitivity as a differentiation factor.

Q: Do the substitute parts include contacts?

A: No. All parts listed, including the original DF57-3S-1.2C and all substitutes, are housings only. Contacts must be procured separately and are not included with the housing.

Q: What is the difference between swing lock, friction lock, and locking ramp fastening types?

A: These represent different mechanical locking mechanisms. Swing lock (DF57-3S-1.2C, DF57H-3S-1.2C) uses a pivoting lever. Friction lock (0510210300) relies on contact pressure. Locking ramp (0874390300, 1775441-3) uses a ramped surface for engagement. Selection depends on application requirements for mating force and retention reliability.

Q: Can I use M40-1100300 (1.00mm pitch) as a substitute?

A: M40-1100300 is not a direct replacement due to pitch difference (1.00mm vs. 1.20mm). Use only if the mating connector can be redesigned to accommodate the smaller pitch. This part offers the tightest pitch among the alternatives and may be suitable for space-constrained applications.