1. U series connector brief introduction:
The U series connector is a push-pull self-locking connector that combines the multi-key position and multi-positioning structure derived from the B-series positioning pin structure and the F-series semi-circular positioning structure. The connector is mainly used for low-frequency signal transmission in electronic equipment. Easy operation, good shielding effect, good sealing, three-key positioning and semi-circular positioning double anti-misinsertion, solid shell, anti-electromagnetic interference, good environmental resistance, long service life and other characteristics. Widely used in medical machinery, communication systems, computers, small communications and other equipment. Making it an ideal choice for Medical, Test & Measurement, Research, Communications, Broadcast Connector, Machines, Defense, Robotic, Aerospace, public sector, Information Systems, Motorsport, Miscellaneous applications.
2. U series connector description:
- security of the Push-Pull self-latching system
- multipole types 2 to 19 contacts
- Easy mating, can be blind-mated (guiding mechanism ensures precise alignment)
- Increased equipment life span (guiding mechanism optimally protects the contacts)
- Robust and shock resistant (designs ideal for equipment used in the field)
- watertight connection (IP 68/IP 66),waterproof and sandproof;
- solder, print (straight or elbow) contacts
- high packing density for space savings
- 360°screening for full EMC shielding.
3. U series connector technical specification:
| Mating Cycles | Humidity(max) | Temperature | Vibration | Shock Resistance | Salt Spray Corrosion | Impact |
| >3000 | <=95% (at 40℃) | -55℃ ~ +145℃ | 15g(10 ~ 2000 Hz) | 100g·6ms | >48h | acceleration 490m/s², ≤1um instantaneous break |
4. Cross reference
| Spring P/N | UP Straight Short Plug | UL Straight Plug (With Lanyard Release) | UR Straight Short Socket | HR Straight Fixed Socket |
| Fischer P/N | UP Straight Short Plug | UR Straight Short Socket | ||
| Picture |  |  |  |  |
| Shell Size | 2U/3U/4U | 2U/3U | 2U/3U | 2U/3U/4U |
| NB of Contacts | 2~19 | 2~16 | 2~16 | 2~19 |
| Keying | R, U, X, V, W | R, U, X, V, W | R, U, X, V, W | R, U, X, V, W |
| Insulator | PEEK | PEEK | PEEK | PEEK |
| Contact Type | Solder Male contact | Solder Male contact | Solder Female contact | Solder Female contact |
| IP Level | IP68 | IP68 | IP68 | IP68 |
| Wire Size/AWG | 18~28 | 18~28 | 18~28 | 18~28 |
| Cable Diameter(mm) | 3.2~9.5 | 3.2~9.5 | – | – |
| Panel Size | – | – | M9/M12 | M9/14/M16 |
| Panel Mounted | – | – | Back | Back |
5. Chooseing tips:
If you have purchased fischer connector and know the original model, please tell us. We will directly offer you our corresponding one.
If you don’t know much about the connector, please make choose according the following factors:
- the use of the environment, indoors or outdoors, waterproof or not;
- the panel hole size, to select the appropriate plug and socket of right dimension;
- the current-voltage, number of contact and the realization of the function, to determine the contact(cores) ;
- select the appropriate clamp diameter and sheath;
- according to the actual needs of different angles of the keys, to determine the keying (the standard keys as N).
Frequently Asked Questions (FAQ)
Q1: Are Spring Technology’s push-pull connectors fully compatible with original brands?
Yes, 100% cross-compatible. All Spring Technology connectors are designed as ideal alternative replacements that mate flawlessly with many leading supplier, guaranteeing stable signal integrity and work performance.
Q2: How much cost can I save by choosing Spring Technology push-pull connectors or cable assemblies?
Save at least 30% to 50% on your costs. By opting for our cost-effective connector options and customized cable assembly offers, you can significantly lower your procurement budget without compromising on industrial quality.
Q3: What is Spring Technology’s standard lead time for push-pull connector orders?
Ultra-short lead times. We maintain a large stock of raw materials and semi-finished components at our facility. Because parts are already in stock, we just need to assemble and test them according to your specific pin configuration, enabling fast delivery.
Q4: Do Spring Technology provide custom OEM/ODM services or turnkey cable assembly solutions?
Yes, we offer complete OEM/ODM and turnkey connection solutions. Beyond supplying individual male plugs and female sockets, our technical team provides custom-tailored cable assembly layouts, wire-stripping, overmolding, and pinning configurations based on your unique design drawings.
Q5: What makes Spring Technology push-pull connectors highly reliable for medical or harsh industrial environments?
19 years of specialized R&D experience and highly automated production. Backed by nearly two decades of manufacturing expertise, our factory utilizes an advanced automatic assembly line, comprehensive laboratory testing, and a strict QC management system. This technical process ensures all products deliver high performance, low resistance, and rugged reliability in demanding applications.