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SI-20140 Equivalent & Substitute Parts
Part Overview
The Stewart Connector SI-20140 is a 1-port RJ45 modular jack connector designed for 10 Base-T applications with AutoMDIX functionality. This through-hole, 90° angle connector features shielding with EMI finger protection and board lock capability. The part is currently active in production with 907 units in stock. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring compatible 8p8c (RJ45, Ethernet) modular jack connectors with matching electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | SI-20140 Value |
|---|---|
| Connector Type | RJ45 Jack |
| Number of Ports | 1 |
| Number of Positions/Contacts | 8p8c |
| Mounting Type | Through Hole |
| Orientation | 90° Angle (Right) |
| Termination | Solder |
| Shielding | Shielded, EMI Finger |
| Contact Finish | Gold |
| Contact Finish Thickness | 50.0µin (1.27µm) |
| Operating Temperature Range | -20°C ~ 85°C |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Tab Direction | Down |
Substitute Part Grouping Explanation
Substitute parts for the SI-20140 are grouped based on the following critical parameters that determine functional compatibility:
Primary Compatibility Criteria:
- Connector Type: 8p8c (RJ45, Ethernet) jack
- Number of Ports: 1
- Mounting Type: Through Hole
- Orientation: 90° Angle (Right)
- Termination: Solder
- Tab Direction: Down
- Contact Finish: Gold at 50.0µin (1.27µm)
- Moisture Sensitivity Level: 1 (Unlimited)
Substitution Groups:
Group 1 - Shielded Cat5 Connectors: Parts 1-5406299-1, 5406217-1, 5406296-1, and 5406299-1 are shielded modular jacks rated for Cat5 applications. These maintain the shielding and EMI finger protection of the original SI-20140 while supporting higher bandwidth applications.
Group 2 - Shielded Cat4 Connectors: Parts 5406295-1, 5406216-2, and 5406298-1 are shielded modular jacks rated for Cat4 applications. These provide equivalent shielding characteristics with Cat4 performance ratings.
Group 3 - Unshielded Cat3 Connectors: Parts 5520251-4 and 5520252-4 are unshielded modular jacks rated for Cat3 applications. These differ from the SI-20140 in shielding configuration and are suitable for applications where EMI protection is not required.
Parameter Comparison
| Parameter | SI-20140 | 1-5406299-1 | 5406217-1 | 5406296-1 | 5406299-1 | 5406295-1 | 5406216-2 | 5406298-1 | 5520251-4 | 5520252-4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Stewart Connector | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity |
| Connector Type | RJ45 Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack | 8p8c Jack |
| Number of Ports | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Positions/Contacts | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c | 8p8c |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Orientation | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) | 90° Angle (Right) |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Shielding | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Shielded, EMI Finger | Unshielded | Unshielded |
| Rating | 10 Base-T | Cat5 | Cat5 | Cat5 | Cat5 | Cat4 | Cat4 | Cat4 | Cat3 | Cat3 |
| Contact Material | Not specified | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Contact Finish Thickness | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) | 50.0µin (1.27µm) |
| Operating Temperature | -20°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Tab Direction | Down | Down | Down | Down | Down | Down | Down | Down | Down | Down |
| MSL | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | Not applicable | ROHS3 Compliant | RoHS Compliant | RoHS Compliant |
| Inventory (Pcs) | 907 | 5539 | 2984 | 2643 | 1155 | 2736 | 986 | 1506 | 4464 | 2108 |
Engineering Selection Recommendations
For Shielded Applications (EMI Protection Required):
TE Connectivity Cat5-rated parts (1-5406299-1, 5406217-1, 5406296-1, 5406299-1) are direct functional equivalents to the SI-20140 with superior compliance status. All four Cat5 options are ROHS3 compliant and support extended operating temperature ranges (-40°C to 85°C). These parts maintain shielding with EMI finger protection and are suitable for applications requiring higher bandwidth performance than 10 Base-T.
TE Connectivity Cat4-rated shielded parts (5406295-1, 5406216-2, 5406298-1) provide equivalent shielding characteristics. Parts 5406295-1 and 5406298-1 are ROHS3 compliant. Part 5406216-2 has not applicable RoHS status. All three support the extended operating temperature range.
For Unshielded Applications:
TE Connectivity unshielded Cat3 parts (5520251-4, 5520252-4) are suitable for applications where EMI shielding is not required. Both are RoHS compliant with extended operating temperature ranges. Part 5520252-4 includes keyed and panel stop features in addition to board lock functionality.
Compliance Considerations:
The SI-20140 is RoHS non-compliant. All TE Connectivity substitute parts listed are either ROHS3 compliant or have defined RoHS status, supporting modern design requirements and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can TE Connectivity Cat5-rated parts replace the SI-20140 in 10 Base-T applications?
A: Yes. Cat5 connectors are backward compatible with 10 Base-T applications. The 8p8c contact configuration, solder termination, through-hole mounting, 90° orientation, and gold contact finish are identical. The Cat5 rating indicates higher bandwidth capability, not incompatibility with lower-speed applications.
Q: What is the difference between shielded and unshielded substitute options?
A: The SI-20140 features shielding with EMI finger protection. Shielded substitute parts (all Cat4 and Cat5 options) maintain this protection. Unshielded parts (5520251-4, 5520252-4) eliminate the shield and are suitable only for applications where EMI protection is not required.
Q: Are there differences in housing material between substitute parts?
A: Yes. The SI-20140 housing material is not specified. Shielded TE Connectivity parts use Polyamide (PA) Nylon housing. Unshielded TE Connectivity parts use Polybutylene Terephthalate (PBT) Polyester housing. Both materials are suitable for through-hole PCB mounting.
Q: Do all substitute parts support the same operating temperature range as the SI-20140?
A: The SI-20140 operates from -20°C to 85°C. All TE Connectivity substitute parts operate from -40°C to 85°C, providing an extended lower temperature range. This extended range does not affect compatibility in applications within the SI-20140 temperature specification.
Q: What is the significance of the Cat rating (Cat3, Cat4, Cat5)?
A: Cat ratings define bandwidth and performance specifications for Ethernet applications. Cat3 supports up to 10 Mbps, Cat4 up to 16 Mbps, and Cat5 up to 100 Mbps. The SI-20140 is rated for 10 Base-T (10 Mbps). Higher-rated parts are backward compatible with lower-speed applications.
Q: Are there packaging differences between substitute parts?
A: All substitute parts are supplied in Tray packaging. The SI-20140 packaging is not specified in the provided data.
Q: Which substitute part has the highest inventory availability?
A: TE Connectivity part 1-5406299-1 (Cat5 shielded) has the highest inventory with 5539 units in stock, followed by 5520251-4 (Cat3 unshielded) with 4464 units.
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