L77DB25SAZ4VFM

Part Overview

The L77DB25SAZ4VFM is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets in a right-angle, through-hole solder configuration. This connector is currently in active production status and represents the primary reference design for this connector class. Alternative models become necessary when the primary part reaches end-of-life status, when inventory constraints require sourcing from secondary suppliers, or when specific mounting or mechanical compatibility requirements necessitate alternative connector geometries or flange specifications.

Substiute Parts

L77DB25SAZ4VFM

Amphenol ICC (Commercial Products)In Stock: 831L77DB25SAZ4VFM Datasheet

Current PartRFQ

174-025-212R141

NorComp Inc.In Stock: 1186174-025-212R141 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for D-Sub connectors is determined by the following critical parameters: connector type (receptacle vs. plug), gender (female sockets vs. male pins), number of positions and row configuration (25-position, 2-row layout), shell size designation (Size 3/DB), mounting style (through-hole, right-angle orientation), and termination method (solder). The substitute part 174-025-212R141 from NorComp Inc. maintains these core electrical and mechanical specifications, enabling direct functional replacement in circuit assemblies.

The following parameters establish substitution validity:

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Shell Size: 3 (DB, B)
• Mounting Type: Through Hole, Right Angle
• Termination: Solder

Parameter Comparison

Engineering Selection Recommendations

The L77DB25SAZ4VFM is the recommended primary choice for new designs and production assemblies due to its active product status and full RoHS compliance. It provides the higher current rating (7.5A versus 5A) and extended operating temperature range (-55°C to 125°C versus -50°C to 100°C), offering superior performance headroom for industrial applications.

The 174-025-212R141 from NorComp Inc. is classified as obsolete and carries ROHS3 compliance rather than current RoHS certification. This substitute is suitable only for legacy system support, field repairs, or replacement of existing assemblies already equipped with this connector variant. The backset spacing difference (0.370" versus 0.319") and reduced current rating necessitate mechanical and electrical evaluation prior to substitution in active designs.

Selection between these parts must account for: (1) design phase (new designs must use L77DB25SAZ4VFM); (2) legacy system constraints; (3) PCB layout and component spacing compatibility with the backset spacing differential; (4) circuit current requirements relative to the 5A and 7.5A ratings.

Frequently Asked Questions (FAQ)

Q: Can the 174-025-212R141 be directly substituted for the L77DB25SAZ4VFM in new designs?

A: No. The 174-025-212R141 is obsolete and should not be specified for new designs. The L77DB25SAZ4VFM is the active reference part and must be used for new production. The 174-025-212R141 is limited to legacy system support.

Q: What are the mechanical compatibility considerations between these two connectors?

A: The primary mechanical difference is backset spacing: the L77DB25SAZ4VFM has 0.319" (8.10mm) spacing, while the 174-025-212R141 has 0.370" (9.40mm) spacing. This difference may impact PCB layout and mounting bracket compatibility. Panel mount capability is an additional feature of the NorComp variant. PCB redesign may be required for substitution.

Q: Are there electrical performance differences?

A: Yes. The L77DB25SAZ4VFM supports 7.5A continuous current, while the 174-025-212R141 is rated for 5A. The L77DB25SAZ4VFM also operates across -55°C to 125°C, compared to -50°C to 100°C for the NorComp part. Circuit designs requiring the full 7.5A capability or extended temperature range cannot use the 174-025-212R141.

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

A: The L77DB25SAZ4VFM specifies 8.00µin (0.203µm) gold plating thickness, while the 174-025-212R141 uses flash gold plating. This difference affects durability in high-cycling insertion/removal applications and long-term reliability in corrosive environments. The specified thickness on the L77DB25SAZ4VFM provides enhanced contact longevity.

Q: Can both parts be sourced from the same supplier?

A: No. The L77DB25SAZ4VFM is manufactured by Amphenol ICC. The 174-025-212R141 is manufactured by NorComp Inc. and is currently in obsolete status, limiting availability through standard distribution channels. New projects must rely on Amphenol ICC distribution networks.

Q: Are there regulatory or compliance differences?

A: Both connectors carry UL94 V-0 flammability certification. The L77DB25SAZ4VFM is RoHS Compliant (full current RoHS standard), while the 174-025-212R141 is ROHS3 Compliant. For new designs subject to current RoHS regulations, the L77DB25SAZ4VFM is the compliant choice.