172-025-212-021 D-Sub 25 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The NorComp Inc. 172-025-212-021 is a 25 position D-Sub receptacle connector with female sockets, designed for panel mount through-hole solder termination applications. This connector features a DB/B shell size (Size 3) configuration with a 2-row contact arrangement and board-side 4-40 flange mounting. With 1132 units in current stock inventory, this part remains available as a new original component.

Equivalent and substitute parts are necessary when the original part becomes obsolete, when alternative packaging formats are required, or when design flexibility permits selection from functionally compatible alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Panel Mount, Through Hole
Termination	Solder
Shell Material, Finish	Steel
Contact Type	Signal
Current Rating (Amps)	5A
Material Flammability Rating	UL94 V-0
Operating Temperature Range	-50°C ~ 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 172-025-212-021 is determined by the following critical parameters:

Primary Compatibility Criteria:

Connector style: D-Sub
Connector type: Receptacle, Female Sockets
Number of positions: 25
Number of rows: 2
Shell size and layout: 3 (DB, B)
Termination method: Solder
Contact type: Signal

Secondary Compatibility Criteria:

Mounting type: Through Hole (panel mount variants acceptable)
Material flammability rating: UL94 V-0
RoHS compliance: ROHS3 Compliant
Operating temperature range: Must encompass or exceed -50°C ~ 100°C

Substitute parts are grouped into two categories: direct manufacturer equivalents from NorComp Inc. (same series, alternative packaging or configuration) and functionally compatible alternatives from HARTING that meet all primary and secondary compatibility criteria. Differences in contact finish, flange feature design, dielectric material composition, and current rating do not preclude substitution when the core electrical and mechanical parameters align.

Parameter Comparison

Parameter	172-025-212-021 (Main)	172-025-212R021	09663116503	09663117503	09663156501	09663156502	09663157501	09663157502	09663516511	09663516512	09663517511
Manufacturer	NorComp Inc.	NorComp Inc.	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets
Number of Positions	25	25	25	25	25	25	25	25	25	25	25
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size, Connector Layout	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)	3 (DB, B)
Mounting Type	Panel Mount, Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shell Material, Finish	Steel, Tin Plated	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel
Current Rating (Amps)	5A	5A	6.5A	6.5A	6.5A	6.5A	6.5A	6.5A	6.5A	6.5A	6.5A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature Range	-50°C ~ 100°C	-50°C ~ 100°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Obsolete	Active	Active	Active	Obsolete	Obsolete	Obsolete	Active	Active	Active
Inventory Status	1132 Pcs New Original In Stock	763 Pcs New Original In Stock	829 Pcs New Original In Stock	657 Pcs New Original In Stock	950 Pcs New Original In Stock	1001 Pcs New Original In Stock	777 Pcs New Original In Stock	1008 Pcs New Original In Stock	1154 Pcs New Original In Stock	713 Pcs New Original In Stock	1006 Pcs New Original In Stock

Engineering Selection Recommendations

Direct NorComp Equivalent: The 172-025-212R021 is a direct functional equivalent from the same manufacturer and series. It maintains identical electrical specifications and operating temperature range. Selection of this part is appropriate when packaging format (Tray vs. standard packaging) is acceptable. Note that this part carries an Obsolete product status; inventory availability should be confirmed prior to design commitment.

HARTING Active Alternatives: Parts 09663116503, 09663117503, 09663156501, 09663516511, 09663516512, and 09663517511 are all active product status alternatives from HARTING. These parts exceed the current rating specification (6.5A vs. 5A) and provide an extended operating temperature range (-55°C ~ 125°C vs. -50°C ~ 100°C). All maintain UL94 V-0 flammability rating and ROHS3 compliance. These alternatives are suitable for applications where the enhanced thermal and current specifications provide design margin or where long-term supply continuity is required.

HARTING Obsolete Alternatives: Parts 09663156502, 09663157501, and 09663157502 carry Obsolete product status. While inventory is currently available, these parts should be selected only when active alternatives are unsuitable or when existing design validation specifically requires these part numbers.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 172-025-212-021 with a HARTING part? A: Yes. All HARTING parts listed (09663116503, 09663117503, 09663156501, 09663156502, 09663157501, 09663157502, 09663516511, 09663516512, 09663517511) meet the core electrical and mechanical compatibility criteria: 25-position D-Sub receptacle, female sockets, 2-row configuration, Size 3 (DB, B) shell, solder termination, through-hole mounting, UL94 V-0 rating, and ROHS3 compliance. The HARTING alternatives provide equal or superior current rating and operating temperature range.

Q: What is the difference between the main part and 172-025-212R021? A: The 172-025-212R021 is a direct NorComp equivalent with identical electrical and mechanical specifications. The primary difference is packaging format (Tray) and product status (Obsolete). Both parts are from the same manufacturer and series (172).

Q: Are there packaging differences among the substitute parts? A: Yes. The 172-025-212R021 and 09663516512 are supplied in Tray packaging. All other HARTING parts are supplied in Bulk packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: Do the HARTING parts have different flange mounting features? A: Yes. The main part and 172-025-212R021 feature board-side 4-40 flange mounting. HARTING parts vary: 09663116503, 09663117503 feature mating-side female screwlock (4-40); 09663156501, 09663156502, 09663157501, 09663157502, 09663516511, 09663517511 feature housing/shell mounting (M3 or 4-40). Flange feature differences do not preclude substitution when panel mounting geometry accommodates the alternative design.

Q: What is the significance of the Board Lock feature on some HARTING parts? A: Parts 09663516511, 09663516512, and 09663517511 include a Board Lock feature. This is an additional mechanical feature that does not affect electrical compatibility or core connector function. Its presence or absence depends on application requirements for enhanced mechanical retention.

Q: Should I select an active or obsolete part? A: Active product status parts (09663116503, 09663117503, 09663156501, 09663516511, 09663516512, 09663517511) are recommended for new designs and long-term production. Obsolete parts should be selected only when design constraints or existing validation specifically require them, and only after confirming current inventory availability.

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