Equivalent & Substitute Parts for A-DSF25LPIII/FP-R

Part Overview

The A-DSF25LPIII/FP-R is a 25-position D-Sub plug connector with IDC ribbon cable termination, manufactured by Assmann WSW Components. This connector is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing system support and new designs. The part features male pins, free-hanging in-line mounting, and is rated for 3A at 250V with an operating temperature range of -55°C to 105°C.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Plug, Male Pins
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Free Hanging (In-Line)
Termination	IDC, Ribbon Cable
Current Rating (Amps)	3A
Voltage Rating	250V
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Wire Gauge	26-28 AWG
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters:

Connector style, type, and pin configuration (D-Sub, 25-position plug, male pins)
Shell size and layout (3/DB/B)
Mounting method (free hanging, in-line)
Termination technology (IDC ribbon cable)
Voltage and current ratings (minimum 250V, minimum 3A)
Operating temperature range (minimum -55°C to 105°C)
Material flammability compliance (UL94 V-0)
Wire gauge compatibility (26 AWG or 26-28 AWG)

Substitute parts are grouped into two categories based on these criteria:

Category A: Direct Functional Equivalents – Parts meeting all core parameters with identical or superior electrical ratings and temperature ranges.

Category B: Enhanced Specification Alternatives – Parts exceeding baseline requirements in current rating, temperature range, or contact finish specifications while maintaining full mechanical and electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Connector Type	Positions	Current Rating (A)	Voltage (V)	Operating Temp (°C)	Shell Material/Finish	Contact Finish	Wire Gauge (AWG)	RoHS Status
A-DSF25LPIII/FP-R	Assmann WSW	Obsolete	Plug, Male Pins	25	3	250	-55 ~ 105	—	—	26-28	REACH Unaffected
A-DSF 25 LPIII/FP	Assmann WSW	Active	Plug, Male Pins	25	3	250	-55 ~ 105	—	—	26-28	RoHS3 Compliant
L117DBFRAA25P	Amphenol ICC	Active	Plug, Male Pins	25	5	250	-40 ~ 125	Steel, Nickel Plated	Gold, 15.0µin	26	RoHS Compliant
L117DBFRB25P	Amphenol ICC	Active	Plug, Male Pins	25	3	250	-55 ~ 105	Steel, Nickel Plated	Gold, 15.0µin	26	RoHS Compliant
L117DBFRBA25P	Amphenol ICC	Active	Plug, Male Pins	25	3	250	-55 ~ 105	Steel, Tin Plated	Gold, 15.0µin	26	RoHS Compliant
L117DBFRCA25P	Amphenol ICC	Active	Plug, Male Pins	25	5	250	-40 ~ 125	Steel, Nickel Plated	Gold, 15.0µin	26	RoHS Compliant
L117DBFRDA25P	Amphenol ICC	Active	Plug, Male Pins	25	5	250	-40 ~ 125	Steel, Nickel Plated	Gold, 15.0µin	26	RoHS Compliant
L17DBFRA25PC309	Amphenol ICC	Active	Plug, Male Pins	25	3	250	-55 ~ 105	Steel, Tin Plated	Gold, 30.0µin	26	RoHS Compliant
L17DBFRAA25P	Amphenol ICC	Active	Plug, Male Pins	25	3	250	-55 ~ 105	Steel, Tin Plated	Gold, Flash	26	RoHS Compliant
L17DBFRAA25PC309	Amphenol ICC	Active	Plug, Male Pins	25	5	250	-25 ~ 85	Steel, Nickel Plated	Gold, 30.0µin	26	RoHS Compliant
L17DBFRB25PC309	Amphenol ICC	Active	Plug, Male Pins	25	5	250	-25 ~ 85	Steel, Nickel Plated	Gold, 30.0µin	26	RoHS Compliant

Engineering Selection Recommendations

Primary Recommendation: A-DSF 25 LPIII/FP

This Assmann WSW part is the direct active equivalent to the obsolete A-DSF25LPIII/FP-R. It maintains identical electrical specifications (3A, 250V), operating temperature range (-55°C to 105°C), and connector geometry. The primary distinction is product status (active versus obsolete) and RoHS3 compliance certification, making it the preferred choice for direct replacement in existing designs.

Secondary Recommendations: Amphenol ICC L-Series (L117DBFRB25P, L17DBFRA25PC309, L17DBFRAA25P)

These Amphenol ICC alternatives provide full mechanical and electrical compatibility with identical or superior specifications. L117DBFRB25P and L17DBFRA25PC309 match the original operating temperature range (-55°C to 105°C) and current rating (3A). All Amphenol options feature enhanced contact finishes (gold plating) and steel shells with defined plating specifications, providing improved corrosion resistance and contact reliability compared to the original part's unspecified shell and contact materials.

Enhanced Specification Options: L117DBFRAA25P, L117DBFRCA25P, L117DBFRDA25P, L17DBFRAA25PC309, L17DBFRB25PC309

These parts exceed baseline requirements with 5A current ratings and extended operating temperature ranges (-40°C to 125°C or -25°C to 85°C). These options are suitable for applications requiring higher current capacity or broader thermal operating windows while maintaining full mechanical compatibility.

All recommended substitutes carry RoHS compliance certification and meet UL94 V-0 flammability requirements.

Frequently Asked Questions (FAQ)

Q: Can L117DBFRAA25P replace A-DSF25LPIII/FP-R directly?

A: Yes. L117DBFRAA25P meets all core substitution criteria: 25-position D-Sub plug configuration, IDC ribbon cable termination, 250V voltage rating, and exceeds the 3A current requirement with a 5A rating. The operating temperature range (-40°C to 125°C) encompasses the original specification (-55°C to 105°C) except at the lower extreme. Mechanical compatibility is confirmed through identical shell size (3/DB/B) and mounting type.

Q: What is the difference between L117DBFRB25P and L117DBFRAA25P?

A: Both are Amphenol ICC 25-position D-Sub plugs with identical connector geometry and IDC termination. L117DBFRB25P matches the original 3A current rating and -55°C to 105°C temperature range, while L117DBFRAA25P provides 5A current capacity and -40°C to 125°C operating range. The flange feature differs: L117DBFRB25P has an unthreaded housing/shell, while L117DBFRAA25P includes a mating-side female screwlock (M3).

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry RoHS compliance certification. The original A-DSF25LPIII/FP-R is marked as REACH Unaffected. The active Assmann equivalent (A-DSF 25 LPIII/FP) is RoHS3 Compliant. All Amphenol ICC alternatives are RoHS Compliant.

Q: What packaging is available for these substitutes?

A: A-DSF 25 LPIII/FP is supplied in Tray packaging. All Amphenol ICC substitutes (L-series) are supplied in Tray packaging.

Q: Can I use L17DBFRAA25PC309 in place of the original part?

A: Yes, with temperature range consideration. L17DBFRAA25PC309 provides full mechanical and electrical compatibility with identical 3A current rating and -55°C to 105°C operating range. It features enhanced gold contact finish (30.0µin thickness) and tin-plated steel shell. The "C309" designation indicates a specific packaging or configuration variant.

Q: Which substitute offers the best corrosion resistance?

A: All Amphenol ICC substitutes feature defined shell material finishes (nickel or tin plated steel) and gold-plated contacts, providing superior corrosion resistance compared to the original part's unspecified materials. L17DBFRA25PC309 and L17DBFRAA25PC309 offer the thickest gold contact finish at 30.0µin (0.76µm).

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