L177DFB25SAM4BVF2 Equivalent & Substitute Parts

Part Overview

The L177DFB25SAM4BVF2 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This right-angle, solder-terminated connector features female sockets with a mating-side female screwlock (4-40) flange and is designed for panel mount and through-hole applications. The connector is currently active in production status with 1073 pieces in stock inventory.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when design revisions require alternative specifications, or when inventory constraints necessitate equivalent alternatives from other manufacturers. The substitute parts listed maintain functional compatibility through equivalent electrical and mechanical parameters while accommodating variations in material finish, current rating, and operating temperature ranges.

Substiute Parts

L177DFB25SAM4BVF2

Amphenol ICC (Commercial Products)In Stock: 1170L177DFB25SAM4BVF2 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

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174-E25-211R241

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L177DFB25SAM4BVF2 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 25
• Number of Rows: 2
• Shell Size, Connector Layout: 3 (DB, B)
• Termination: Solder
• Contact Type: Signal
• Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

• Mounting Type: Panel Mount and/or Through Hole configurations
• Flange Feature: Mating-side female screwlock or housing/shell variations
• Shell Material Finish: Steel with different plating options (Tin, Nickel, Yellow Chromate)
• Contact Finish Thickness: 30.0µin or Flash
• Current Rating: 5A to 7.5A range
• Voltage Rating: 300V or unspecified
• Operating Temperature: -55°C to -50°C minimum; 100°C to 125°C maximum
• RoHS Status: Compliant or non-compliant variants
• Contact Material: Copper Alloy or Brass

The substitute parts 173-E25-213R001, 174-E25-211R001, 174-E25-211R141, and 174-E25-211R241 satisfy the mandatory matching parameters while accommodating allowable variations in material specifications and electrical ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L177DFB25SAM4BVF2 (Amphenol ICC)

The L177DFB25SAM4BVF2 is the recommended primary choice. This part maintains active production status, carries RoHS compliance certification, and provides the highest current rating (7.5A) and operating temperature range (-55°C to 125°C) among all listed options. The tin-plated steel shell with 30.0µin gold contact finish and 300V voltage rating support demanding applications.

Secondary Selection: 173-E25-213R001 (NorComp Inc.)

The 173-E25-213R001 serves as the preferred substitute when the primary part is unavailable. This part is currently active in production, carries ROHS3 compliance, and maintains the full operating temperature range (-55°C to 125°C) matching the primary part. The nickel-plated steel shell provides corrosion resistance equivalent to tin plating. The primary limitation is the reduced current rating (5A versus 7.5A), which is acceptable for applications not requiring the full 7.5A capacity. The housing/shell unthreaded flange differs from the female screwlock configuration but maintains mechanical compatibility for panel mount and through-hole applications.

Tertiary Selections: 174-E25-211R001, 174-E25-211R141, 174-E25-211R241 (NorComp Inc.)

These three NorComp parts are classified as obsolete and carry RoHS non-compliance status. Selection of these parts is limited to legacy system maintenance or applications where RoHS compliance is not required. All three parts feature yellow chromate-plated steel shells and reduced operating temperature ranges (-50°C to 100°C). The 174-E25-211R141 and 174-E25-211R241 provide flange configurations closer to the primary part (mating-side screwlock and standard screws respectively), while 174-E25-211R001 uses an unthreaded housing/shell flange. Current rating across all three is 5A.

Compliance Considerations:

Applications requiring RoHS compliance must use either L177DFB25SAM4BVF2 or 173-E25-213R001. Applications subject to REACH regulations should note that 173-E25-213R001 carries REACH Unaffected status, while the NorComp 174-E series parts also carry REACH Unaffected status despite RoHS non-compliance.

Frequently Asked Questions (FAQ)

Q: Can the 173-E25-213R001 directly replace the L177DFB25SAM4BVF2 in all applications?

A: The 173-E25-213R001 is mechanically and electrically compatible for most applications. The primary difference is the reduced current rating (5A versus 7.5A). Applications operating at or near 7.5A require verification that the 5A rating is acceptable. The housing/shell unthreaded flange differs from the female screwlock configuration; panel mounting compatibility depends on the specific mounting hardware used in the application.

Q: What is the significance of the flange feature differences between these parts?

A: The L177DFB25SAM4BVF2 features a mating-side female screwlock (4-40), which provides threaded engagement for secure mating. The 173-E25-213R001 uses an unthreaded housing/shell flange, which relies on mechanical friction and mounting brackets for retention. The 174-E25-211R141 and 174-E25-211R241 provide mating-side screwlock options (female and standard screws respectively). Flange selection depends on the mating connector type and the mechanical retention requirements of the application.

Q: Why do the NorComp 174-E series parts show obsolete status?

A: Obsolete status indicates these parts are no longer in active production. While inventory may remain available from distributors, long-term availability is not guaranteed. New designs should specify either the active L177DFB25SAM4BVF2 or the active 173-E25-213R001 to ensure supply chain continuity.

Q: What is the impact of shell material finish differences on connector performance?

A: The L177DFB25SAM4BVF2 uses tin plating, the 173-E25-213R001 uses nickel plating, and the 174-E series parts use yellow chromate plating. All three finishes provide corrosion resistance suitable for standard industrial environments. Nickel and tin plating offer superior corrosion resistance compared to yellow chromate. Material finish selection should consider the operating environment; harsh or marine environments may benefit from nickel or tin plating over yellow chromate.

Q: Are there any temperature-related limitations when substituting parts?

A: The L177DFB25SAM4BVF2 and 173-E25-213R001 both support -55°C to 125°C operation. The 174-E series parts support only -50°C to 100°C. Applications requiring operation below -50°C or above 100°C must use either the primary part or the 173-E25-213R001 substitute. Applications operating within the -50°C to 100°C range can use any of the listed parts, subject to other compatibility constraints.

Q: What does RoHS compliance mean for connector selection?

A: RoHS (Restriction of Hazardous Substances) compliance restricts the use of lead, cadmium, mercury, and other hazardous materials. The L177DFB25SAM4BVF2 is RoHS Compliant, and the 173-E25-213R001 is ROHS3 Compliant. The 174-E series parts are RoHS non-compliant. Applications subject to RoHS regulations (primarily in the European Union and similar jurisdictions) must use compliant parts. The L177DFB25SAM4BVF2 or 173-E25-213R001 are the only acceptable choices for RoHS-regulated applications.

Q: How does the current rating difference affect circuit design?

A: The L177DFB25SAM4BVF2 supports 7.5A per contact, while substitute parts support 5A per contact. For applications using all 25 positions at maximum current, the primary part supports 187.5A total capacity, while substitutes support 125A total capacity. Applications operating below 5A per contact are unaffected by this difference. Circuit designs operating between 5A and 7.5A per contact require verification that the substitute part's 5A rating is acceptable.

Q: What packaging considerations apply to these parts?

A: All listed parts are supplied in tray packaging. Inventory quantities vary: L177DFB25SAM4BVF2 (1073 pcs), 173-E25-213R001 (1264 pcs), 174-E25-211R001 (1166 pcs), 174-E25-211R141 (983 pcs), and 174-E25-211R241 (1023 pcs). Tray packaging is standard for connector distribution and does not affect electrical or mechanical performance.