PCN21B-55PC-2W Equivalent & Substitute Parts

Part Overview

The PCN21B-55PC-2W is a 55-position header connector manufactured by Hirose Electric Co Ltd, designed for backplane applications with 2.00mm pitch and press-fit termination. This connector features male pins, through-hole mounting, and gold-plated contacts rated for 1.5A at 300V across an operating temperature range of -55°C to 125°C.

The PCN21B-55PC-2W is classified as obsolete. Equivalent and substitute parts are necessary to maintain design compatibility and ensure continued availability for new production runs, repairs, and system upgrades where the original component is no longer manufactured.

Key Parameters

Parameter	PCN21B-55PC-2W
Manufacturer	Hirose Electric Co Ltd
Number of Positions	55
Pitch	0.079" (2.00mm)
Number of Rows	5
Connector Type	Header, Male Pins
Mounting Type	Through Hole
Termination	Press-Fit
Contact Finish	Gold
Current Rating	1.5 A
Voltage Rating	300V
Operating Temperature	-55°C ~ 125°C
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the PCN21B-55PC-2W are grouped into two categories based on position count and electrical specifications:

Category 1: Direct 55-Position Substitutes These parts maintain identical position count (55), pitch (2.00mm), row configuration (5 rows), connector type (header, male pins), mounting type (through hole), and termination method (press-fit). Substitution is valid when the substitute part meets or exceeds the original specifications for current rating, voltage rating, and operating temperature range. All parts in this category feature gold contact finish and MSL 1 rating.

Qualifying parts: 100159-1 (TE Connectivity), 17030552201 (HARTING), 17030552202 (HARTING), HM2P09PA5110AALF (Amphenol ICC), HM2P09PC5110N9LF (Amphenol ICC), HM2P09PC5110Z1LF (Amphenol ICC), HM2P09PD5110N9LF (Amphenol ICC)

Category 2: Extended 77-Position Substitutes These parts feature 77 positions (55 signal + 22 ground), 2.00mm pitch, 7 rows (5 + 2), header male pins, through-hole mounting, and press-fit termination. These are functional alternatives for applications requiring additional grounding capability while maintaining the same pitch and basic connector architecture.

Qualifying parts: CP2-HC055-GA1-FJ (3M), CP2-HC055-GF1-KR (3M), HM2P09PA5111AALF (Amphenol ICC)

Parameter Comparison

Parameter	PCN21B-55PC-2W	100159-1	17030552201	17030552202	HM2P09PA5110AALF	HM2P09PC5110N9LF	HM2P09PC5110Z1LF	HM2P09PD5110N9LF	CP2-HC055-GA1-FJ	CP2-HC055-GF1-KR	HM2P09PA5111AALF
Number of Positions	55	55	55	55	55	55	55	55	77	77	77
Pitch (mm)	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00
Number of Rows	5	5	5	5	5	5	5	5	5 + 2	5 + 2	5 + 2
Connector Type	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit
Contact Finish	Gold	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (A)	1.5	1.5	1.0	1.0	1.5	1.5	1.5	1.5	—	—	1.5
Voltage Rating	300V	500Vrms	—	—	750Vrms	750Vrms	750Vrms	750Vrms	—	—	750Vrms
Operating Temperature	-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	-55°C ~ 125°C	-55°C ~ 125°C
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	—	Not applicable	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

For Direct 55-Position Replacement:

The Amphenol ICC (FCI) Millipacs® series parts (HM2P09PA5110AALF, HM2P09PC5110N9LF, HM2P09PC5110Z1LF, HM2P09PD5110N9LF) provide the most direct electrical equivalence to the PCN21B-55PC-2W. All maintain 1.5A current rating, exceed the original 300V specification with 750Vrms rating, and are RoHS compliant with active product status. These parts are available in high inventory quantities and support immediate procurement.

The TE Connectivity 100159-1 offers active product status with 500Vrms voltage rating and 1.5A current capacity. This part is suitable for applications where the original 300V specification is adequate.

The HARTING har-bus® HM series (17030552201, 17030552202) provides ROHS3 compliance and active status. Current rating is specified at 1.0A, which is below the original 1.5A specification. These parts are suitable only for applications with reduced current requirements.

For Extended 77-Position Applications:

The 3M MetPak™ CP2 series (CP2-HC055-GA1-FJ, CP2-HC055-GF1-KR) and Amphenol ICC HM2P09PA5111AALF provide 77-position configurations with integrated ground planes. These are functional alternatives for designs requiring enhanced grounding architecture while maintaining 2.00mm pitch compatibility. All three parts are RoHS compliant and active products.

Compliance Considerations:

All substitute parts listed are RoHS compliant or not applicable, matching or exceeding the environmental standards of the original component. MSL 1 rating is maintained across all alternatives, indicating unlimited shelf life under standard storage conditions.

Frequently Asked Questions (FAQ)

Q: Can I use a 77-position substitute in place of the 55-position PCN21B-55PC-2W?

A: The 77-position parts (CP2-HC055-GA1-FJ, CP2-HC055-GF1-KR, HM2P09PA5111AALF) maintain the same 2.00mm pitch and through-hole press-fit termination. Mechanical and electrical compatibility depends on PCB layout and connector socket design. The additional 22 ground positions require corresponding PCB modifications. These are functional alternatives only when the application design accommodates the extended position count.

Q: What is the difference between the Amphenol ICC HM2P09 variants?

A: The HM2P09 series variants differ in contact finish thickness and material composition. HM2P09PA5110AALF features 29.5µin (0.75µm) gold finish, HM2P09PC5110N9LF specifies 30.0µin (0.76µm), HM2P09PC5110Z1LF provides 15.0µin (0.38µm), and HM2P09PD5110N9LF uses flash gold finish. All maintain 1.5A current rating and 750Vrms voltage specification. Selection depends on contact durability requirements and mating cycle expectations.

Q: Are the HARTING 17030552201 and 17030552202 fully equivalent to the PCN21B-55PC-2W?

A: Both HARTING parts maintain identical mechanical specifications (55 positions, 2.00mm pitch, 5 rows, through-hole press-fit). However, the current rating is specified at 1.0A compared to the original 1.5A. These parts are suitable only for applications with maximum current requirements of 1.0A or less. Voltage rating is not specified for these parts.

Q: What packaging options are available for substitute parts?

A: Substitute parts are supplied in multiple packaging formats: TE Connectivity 100159-1 in tube packaging, HARTING parts in tube, Amphenol ICC Millipacs® series in tray, 3M MetPak™ CP2 series in tube (CP2-HC055-GA1-FJ) or bulk (CP2-HC055-GF1-KR). Packaging selection affects handling, storage, and automated assembly compatibility.

Q: Is the PCN21B-55PC-2W obsolescence critical for new designs?

A: Yes. The PCN21B-55PC-2W is classified as obsolete, meaning Hirose Electric Co Ltd no longer manufactures this component. For new production designs, active substitute parts from TE Connectivity, HARTING, Amphenol ICC, or 3M are required. Existing inventory of the original part is limited to 1020 pieces.

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