L77HDDH78SOL2 Equivalent & Substitute Parts

Part Overview

The L77HDDH78SOL2 is a 78-position D-Sub high-density receptacle connector manufactured by Amphenol ICC. This female socket connector is designed for through-hole solder termination and is actively produced with full inventory availability. The part operates across a wide temperature range (-55°C to 155°C) and carries a 250V rating with 3A current capacity per contact. Finding equivalent or substitute parts may be necessary when addressing supply chain continuity, specific mounting requirements, or alternative sourcing options for applications utilizing high-density D-Sub receptacles.

Substiute Parts

L77HDDH78SOL2

Amphenol ICC (Commercial Products)In Stock: 1217L77HDDH78SOL2 Datasheet

Current PartRFQ

09641147212

HARTINGIn Stock: 92609641147212 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 09641147212 (HARTING) shares the primary connector category classification (D-Sub, D-Shaped Connectors) and basic functional architecture (receptacle, female sockets, through-hole solder termination). However, substitution is constrained by the following parameter mismatches:

Key Parameter Divergences:

• Number of Positions: Main part (78) vs. Substitute (9)
• Shell Size, Connector Layout: Main part (5/DD, D High Density) vs. Substitute (1/DE, E)
• Number of Rows: Main part (4) vs. Substitute (2)
• Mounting Style: Main part (vertical) vs. Substitute (right-angle)
• Voltage Rating: Main part (250V) vs. Substitute (100V)
• Current Rating: Main part (3A) vs. Substitute (7.5A)
• Operating Temperature Range: Main part (-55°C to 155°C) vs. Substitute (-20°C to 125°C)
• Contact Material: Main part (Phosphor Bronze) vs. Substitute (Copper Alloy)
• Dielectric Material: Main part (Thermoplastic, Glass Filled) vs. Substitute (PCT)

The substitute part operates within a reduced electrical and thermal envelope and accommodates significantly fewer contact positions. Direct pin-for-pin substitution is not possible due to fundamental differences in connector density and layout architecture.

Parameter Comparison

Engineering Selection Recommendations

Both the L77HDDH78SOL2 and 09641147212 are active products with current manufacturing status and RoHS compliance. The primary barrier to substitution is the fundamental architectural difference: the main part accommodates 78 contact positions in a high-density, 4-row configuration, while the substitute accommodates only 9 positions in a 2-row, standard-density layout.

Selection between these parts is determined by application-specific connector density requirements. If the application circuit requires 78 signal connections within a compact footprint, the L77HDDH78SOL2 is the only viable option. If the application circuit accommodates a 9-position connector and can tolerate the reduced voltage rating (100V vs. 250V) and lower temperature ceiling (-20°C to 125°C vs. -55°C to 155°C), the 09641147212 may serve as an alternative solution with higher per-contact current capacity (7.5A vs. 3A).

Both parts carry equivalent flammability compliance (UL94 V-0) and unlimited moisture sensitivity (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can the 09641147212 be used as a direct replacement for the L77HDDH78SOL2? A: No. The substitute part has significantly different electrical and physical specifications. The 09641147212 accommodates only 9 positions compared to 78, operates at 100V instead of 250V, and features right-angle mounting instead of vertical mounting. Pin-for-pin compatibility does not exist.

Q: What are the critical parameters that define substitutability for D-Sub receptacle connectors? A: Critical parameters include number of positions, shell size and layout density, connector orientation (vertical or right-angle), voltage rating, current rating per contact, operating temperature range, and mounting footprint. Divergence in any of these parameters eliminates direct substitution possibilities.

Q: Does the substitute part offer any performance advantages? A: The 09641147212 provides 7.5A per-contact current capacity compared to 3A for the L77HDDH78SOL2. However, this is offset by reduced voltage rating (100V vs. 250V) and narrower operating temperature range (-20°C to 125°C vs. -55°C to 155°C).

Q: Are both parts RoHS compliant? A: Yes. The L77HDDH78SOL2 carries RoHS Compliant status, and the 09641147212 carries ROHS3 Compliant status. Both parts meet RoHS regulatory requirements for their respective markets.

Q: What mounting considerations apply to these connectors? A: The L77HDDH78SOL2 is through-hole vertical mount with board-side flange (4-40). The 09641147212 is through-hole right-angle mount with housing/shell flange (4-40) and includes board lock, filter, and mounting bracket features. Physical PCB layout and three-dimensional space constraints determine mounting feasibility.

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