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PCN21B-55SCA-2PF-G Equivalent & Substitute Parts
Part Overview
The PCN21B-55SCA-2PF-G is a 55-position receptacle connector manufactured by Hirose Electric Co Ltd, designed for backplane applications with 2.00mm pitch and press-fit termination. This connector features female sockets, right-angle mounting, and gold-plated contacts rated for 1.5A at 300V across an operating temperature range of -55°C to 125°C.
The PCN21B-55SCA-2PF-G is classified as obsolete. Equivalent substitute parts from active product lines are available to maintain design compatibility and ensure continued component availability for new production and field service applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 55 |
| Pitch | 0.079" (2.00mm) |
| Number of Rows | 5 |
| Mounting Type | Through Hole, Right Angle |
| Termination | Press-Fit |
| Contact Finish | Gold |
| Current Rating | 1.5 A |
| Voltage Rating | 300V |
| Operating Temperature | -55°C ~ 125°C |
| Connector Style | C 11 |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the PCN21B-55SCA-2PF-G are qualified based on the following electrical and mechanical parameters:
- 55-position receptacle configuration with female sockets
- 2.00mm (0.079") pitch spacing
- 5-row arrangement
- Through-hole, right-angle mounting
- Press-fit termination method
- Gold contact finish
- 1.5A current rating capability
- Operating temperature range of -55°C to 125°C
- Connector style compatibility (C 11 or CR 11 variants)
All substitute parts are from the Amphenol ICC (FCI) Millipacs® series and maintain these core electrical and mechanical specifications. Variations in mounting style (board edge vs. standard through-hole), shielding features (board guide, upper shield, upper and lower shield), and voltage rating enhancements (750Vrms vs. 300V) do not preclude substitution when the primary functional parameters align.
Parameter Comparison
| Parameter | PCN21B-55SCA-2PF-G | HM2R03PA5100N9LF | HM2R03PA5108N9LF | HM2R20PA5100N9LF | HM2R21PA5101N9LF | HM2R30PA5100AALF | HM2R30PA5100N9LF | HM2R30PA5108N9LF |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Hirose Electric Co Ltd | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) |
| 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 |
| Number of Positions | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
| Pitch | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) | 0.079" (2.00mm) |
| Number of Rows | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Mounting Type | Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle | Board Edge, Through Hole, Right Angle |
| Termination | Press-Fit | Press-Fit | Press-Fit | Press-Fit | Press-Fit | Press-Fit | Press-Fit | Press-Fit |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Current Rating (Amps) | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Voltage Rating | 300V | 750Vrms | 750Vrms | 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 |
| Connector Style | C 11 | C 11 | C 11 | CR 11 | CR 11 | C 11 | C 11 | C 11 |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | Not specified | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All listed substitute parts maintain electrical and mechanical compatibility with the PCN21B-55SCA-2PF-G. Selection among the Amphenol ICC (FCI) Millipacs® alternatives should be based on the following criteria:
For Standard Applications: HM2R30PA5100N9LF or HM2R30PA5100AALF provide direct functional equivalence with active product status and RoHS compliance. These parts feature the C 11 connector style matching the original specification.
For Enhanced Voltage Requirements: All substitute parts are rated at 750Vrms, exceeding the original 300V specification. This provides additional design margin for applications requiring higher voltage isolation.
For Shielded Configurations: HM2R03PA5108N9LF and HM2R30PA5108N9LF incorporate upper shield features for applications requiring electromagnetic interference mitigation. HM2R21PA5101N9LF provides upper and lower shielding for maximum EMI protection.
For CR 11 Style Compatibility: HM2R20PA5100N9LF and HM2R21PA5101N9LF are available for designs specifying CR 11 connector style variants.
All substitute parts are RoHS compliant and carry active product status, ensuring long-term availability and supply chain continuity.
Frequently Asked Questions (FAQ)
Q: Can HM2R30PA5100N9LF be used as a direct replacement for PCN21B-55SCA-2PF-G?
A: Yes. Both connectors share identical electrical and mechanical specifications: 55-position receptacle, 2.00mm pitch, 5-row configuration, through-hole right-angle mounting, press-fit termination, 1.5A current rating, and -55°C to 125°C operating temperature. The HM2R30PA5100N9LF is active and RoHS compliant, making it suitable for new designs and field replacements.
Q: What is the difference between C 11 and CR 11 connector styles?
A: Connector style designates the physical configuration and keying arrangement. C 11 and CR 11 variants maintain the same electrical and positional specifications but differ in mechanical keying. Selection depends on the mating connector type in your application. Verify mating connector compatibility before substitution.
Q: Why do substitute parts have a higher voltage rating (750Vrms vs. 300V)?
A: The Amphenol ICC (FCI) Millipacs® series is designed with enhanced voltage isolation capabilities. The 750Vrms rating provides additional design margin and is backward compatible with applications rated at 300V. No design modification is required when substituting to a higher-rated part.
Q: Are shielded variants (HM2R03PA5108N9LF, HM2R30PA5108N9LF) compatible with unshielded designs?
A: Shielded variants are mechanically and electrically compatible with unshielded designs. The shield features provide additional EMI protection without affecting signal integrity or pin configuration. Shielded parts can be used in place of unshielded parts if board layout accommodates the shield structure.
Q: What is the packaging format for substitute parts?
A: All substitute parts are supplied in Tray packaging, suitable for automated assembly and component handling.
Q: Are all substitute parts RoHS compliant?
A: Yes. All listed Amphenol ICC (FCI) Millipacs® substitute parts are RoHS compliant, meeting environmental and regulatory requirements for new product designs.
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