DF57H-4P-1.2V(21) Equivalent & Substitute Parts

Part Overview

The DF57H-4P-1.2V(21) is a rectangular connector header manufactured by Hirose Electric Co., Ltd., designed for surface mount applications. This connector features 4 positions with 0.047" (1.20mm) pitch mating, male blade contacts, and solder termination with swing lock fastening. The part is actively produced and widely used in board-to-cable/wire interconnect applications. Substitute parts may be required due to inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

DF57H-4P-1.2V(21)

Hirose Electric Co., Ltd.In Stock: 3371DF57H-4P-1.2V(21) Datasheet

Current PartRFQ

0781710004

MolexIn Stock: 434560781710004 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DF57H-4P-1.2V(21) is determined by strict alignment of the following critical parameters:

• Pitch - Mating: 0.047" (1.20mm) - must match exactly for mechanical compatibility
• Number of Positions: 4 - connector must accommodate the same pin count
• Number of Rows: 1 - single-row configuration required
• Mounting Type: Surface Mount - PCB assembly method must be identical
• Termination: Solder - connection method must be solder-based
• Insulation Material: Liquid Crystal Polymer (LCP) - material specification must be maintained
• Operating Temperature Range: -35°C ~ 85°C - substitute must support this range or exceed it
• Material Flammability Rating: UL94 V-0 - safety certification must be met or exceeded
• RoHS Status: ROHS3 Compliant - regulatory compliance must be maintained

The Molex 0781710004 (Pico-EZmate 78171 series) qualifies as a substitute based on matching all critical parameters: 4-position, 1.20mm pitch, surface mount, solder termination, LCP insulation, UL94 V-0 rating, and ROHS3 compliance. Differences in connector type (plug vs. header), contact type (tab vs. blade), fastening mechanism (friction lock vs. swing lock), and contact finish (gold vs. tin) do not prevent substitution when mating with compatible receptacles.

Parameter Comparison

Engineering Selection Recommendations

Both the DF57H-4P-1.2V(21) and 0781710004 are active products with ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts should be based on:

• Mating interface requirements: The DF57H-4P-1.2V(21) header requires a compatible receptacle designed for Hirose DF57H series connectors. The Molex 0781710004 plug requires a compatible receptacle designed for Molex Pico-EZmate 78171 series connectors. These are not directly interchangeable without appropriate mating connectors.

• Operating temperature: The DF57H-4P-1.2V(21) supports -35°C to 85°C, while the 0781710004 supports -25°C to 85°C. Applications requiring operation below -25°C must use the Hirose part.

• Contact finish: The DF57H-4P-1.2V(21) uses tin finish; the 0781710004 uses gold finish. Gold-plated contacts provide enhanced corrosion resistance and are suitable for applications with extended shelf life or harsh environmental exposure.

• Packaging: The DF57H-4P-1.2V(21) is supplied in Cut Tape (CT); the 0781710004 is supplied in Tape & Reel (TR). Tape & Reel packaging is optimized for high-volume automated assembly.

Frequently Asked Questions (FAQ)

Q: Can the DF57H-4P-1.2V(21) and 0781710004 be used interchangeably in the same circuit?

A: Direct mechanical and electrical interchangeability depends on the mating connector used in the application. The DF57H-4P-1.2V(21) is a header that mates with Hirose DF57H series receptacles. The 0781710004 is a plug that mates with Molex Pico-EZmate 78171 series receptacles. These are separate connector systems and cannot mate with each other. Substitution is only possible if the application design accommodates the corresponding mating connector.

Q: What are the critical parameters that must match for substitution?

A: The following parameters must match exactly: mating pitch (0.047" / 1.20mm), number of positions (4), number of rows (1), mounting type (surface mount), termination method (solder), insulation material (LCP), flammability rating (UL94 V-0), and regulatory compliance (ROHS3). Operating temperature range and contact finish may differ based on application requirements.

Q: Does the difference in operating temperature range affect substitution?

A: The DF57H-4P-1.2V(21) operates from -35°C to 85°C, while the 0781710004 operates from -25°C to 85°C. For applications requiring operation below -25°C, the Hirose part must be used. For applications within -25°C to 85°C, both parts are suitable.

Q: What is the significance of the contact finish difference?

A: The DF57H-4P-1.2V(21) uses tin-plated contacts; the 0781710004 uses gold-plated contacts. Tin plating is suitable for standard applications with moderate shelf life. Gold plating provides superior corrosion resistance and is preferred for applications with extended storage, high-reliability requirements, or exposure to corrosive environments.

Q: How does packaging affect the selection between these parts?

A: The DF57H-4P-1.2V(21) is supplied in Cut Tape (CT) packaging, suitable for manual assembly or small-batch production. The 0781710004 is supplied in Tape & Reel (TR) packaging, optimized for high-volume automated pick-and-place assembly. Packaging selection should align with production volume and assembly methodology.

Q: Are both parts currently available?

A: Both parts have Active product status. The DF57H-4P-1.2V(21) has 3,319 pieces in stock; the 0781710004 has 43,439 pieces in stock. Availability may vary based on current demand and supply chain conditions.