L77DFBH25S1AMN - Equivalent & Substitute Parts

Part Overview

The L77DFBH25S1AMN is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets in a right-angle solder configuration. This connector is currently in active product status and is RoHS compliant. Substitute parts are necessary when the primary part is unavailable, reaches end-of-life, or when specific performance characteristics of alternative designs better match application requirements.

Substiute Parts

L77DFBH25S1AMN

Amphenol ICC (Commercial Products)In Stock: 1073L77DFBH25S1AMN Datasheet

Current PartRFQ

173-E25-213R001

NorComp Inc.In Stock: 1275173-E25-213R001 Datasheet

SimilarRFQ

174-E25-211R001

NorComp Inc.In Stock: 1217174-E25-211R001 Datasheet

SimilarRFQ

174-E25-211R141

NorComp Inc.In Stock: 1041174-E25-211R141 Datasheet

SimilarRFQ

174-E25-211R241

NorComp Inc.In Stock: 1127174-E25-211R241 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L77DFBH25S1AMN are evaluated based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Connector type: Receptacle, Female Sockets
• Number of positions and rows: 25 positions, 2 rows
• Shell size: 3 (DB, B)
• Termination method: Solder
• Mounting configuration: Right angle

Performance Constraints:

• Current rating: 7.5A (main part baseline)
• Voltage rating: 300V (main part baseline)
• Operating temperature range: -55°C ~ 125°C
• Contact finish: Gold plating
• Material flammability: UL94 V-0

The substitute parts listed—173-E25-213R001, 174-E25-211R001, 174-E25-211R141, and 174-E25-211R241—share the core connector configuration but vary in shell material finish, current rating, voltage specification, backset spacing, and product status. Substitution is valid where specifications meet or exceed application requirements.

Parameter Comparison

Engineering Selection Recommendations

L77DFBH25S1AMN (Amphenol ICC) - Primary Selection This part remains the preferred choice for new designs. It maintains active product status, delivers the highest current rating (7.5A), meets the full operating temperature specification (-55°C ~ 125°C), and holds current RoHS compliance certification. The tin-plated steel shell and glass-filled thermoplastic dielectric provide robust environmental performance.

173-E25-213R001 (NorComp Inc.) - Active Substitute This part is suitable as a direct substitute where the lower current rating (5A) is acceptable. It maintains active product status and ROHS3 compliance. The backset spacing differs significantly (7.20mm versus 10.30mm), requiring mechanical layout verification. The nickel-plated shell and nylon 6T dielectric are compatible with the application operating temperature range.

174-E25-211R001, 174-E25-211R141, 174-E25-211R241 (NorComp Inc.) - Obsolete Substitutes These parts have obsolete product status and RoHS non-compliance, limiting their use to legacy systems or applications not subject to RoHS restrictions. The 5A current rating and narrower operating temperature range (-50°C ~ 100°C) represent constraints relative to the main part. Backset spacing is 9.40mm, approximating the main part specification. Available inventory supports replacement availability for existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 173-E25-213R001 be used in place of the L77DFBH25S1AMN? A: The 173-E25-213R001 shares core connector geometry and termination method, but the backset spacing differs (7.20mm versus 10.30mm). This spacing difference affects mounting hole alignment on the PCB. Verify that the receiving board layout accommodates the reduced backset dimension before substitution.

Q: What is the impact of the current rating difference (7.5A versus 5A)? A: The L77DFBH25S1AMN supports 7.5A per contact, while NorComp substitutes are rated at 5A. For applications exceeding 5A per contact, the Amphenol part is required. For applications at or below 5A, the current rating is equivalent.

Q: Why are some substitute parts marked as obsolete? A: The 174-E25 series (211R001, 211R141, 211R241) have been discontinued by NorComp Inc. While existing inventory remains available, new production is not sourced. Use the active 173-E25-213R001 or continue with the L77DFBH25S1AMN for long-term design lifecycles.

Q: Does RoHS compliance affect substitution eligibility? A: The L77DFBH25S1AMN and 173-E25-213R001 are RoHS compliant. The 174-E25 series parts are not RoHS compliant. Regulatory or customer requirements may mandate RoHS-compliant selection. Verify compliance requirements before finalizing a substitute part choice.

Q: How do shell material finishes compare? A: The L77DFBH25S1AMN uses tin plating; the 173-E25-213R001 uses nickel plating; and the 174-E25 series use yellow chromate plating. Tin and nickel platings provide superior corrosion resistance compared to yellow chromate. Environmental exposure and long-term reliability expectations should guide finish selection.

Q: What is the significance of the different operating temperature ranges? A: The L77DFBH25S1AMN and 173-E25-213R001 support -55°C ~ 125°C, while the 174-E25 series support -50°C ~ 100°C. Applications requiring operation at temperatures below -50°C or above 100°C require either the Amphenol part or the active NorComp 173-E25-213R001.

Q: Are the flange features interchangeable? A: No. The L77DFBH25S1AMN features board-side mounting (4-40), the 173-E25-213R001 has unthreaded housing, and the 174-E25 series have mating-side screwlock or standard screw features. Mounting compatibility depends on the receiving connector on the mating cable assembly. Verify connector type before substitution.