Solder Sleeve Closed End Splices
Solder Sleeve Closed End Splices
Application
Designed to terminate and seal multi-wire bundles efficiently. These connectors feature a unique internal copper coil that mechanically grips the wires prior to soldering. In a single heating step, the solder ring melts to fuse the conductors, while the adhesive-lined sleeve shrinks to create a compact, waterproof seal. It is a superior, high-reliability alternative to traditional crimp caps or twist-on connectors for harsh environments.
Series Overview
• SE125AP provides splash-proof sealing and is built without an adhesive ring.
• SE125A adds a hot-melt adhesive ring for full immersion sealing.
• SE125B combines the adhesive ring with a solder formulation which meet environmental protection requirements for immersion-grade sealing.
All three series operate reliably from –40 °C to 125 °C. The heat-shrink sleeve begins to recover at 150 °C, reaches full recovery at 175 °C, and the solder ring transitions from initial melt to complete reflow between 138 °C and 160 °C.
Features and Benefits
• Superior Conductivity: Creates a soldered connection with minimal resistance, ensuring better performance than crimping under vibration.
• Reinforced Protection: The heat-shrink sleeve provides robust insulation and significantly enhances the tensile strength of the splice.
• Environmental Seal: Adhesive lining melts to form a watertight barrier against moisture, oils, and industrial dust.
• Visual Identification: Features a color-coded bead system for instant wire gauge verification, simplifying selection and inspection.
• Global Compliance: Available in lead-free versions to meet international environmental standards.
Color
Red, Blue, Yellow, Green
Notes
• All wire-size combinations listed in Table B-D will form reliable solder joints; final strain-relief performance depends on bundle diameter.
• Pre-tin wires ≥16 AWG (1.21 mm²) or with >19 strands for optimal solder wetting.
• For wire bundles not covered in the tables, calculate total CMA (mm²) and select the smallest part that accommodates both CMA and outer diameter.
• Detailed material data sheets are available on request.
• Need assistance choosing the right part? Please contact us.
| Table A. Product Options | ||
| Product Series | Enviromental Protections | Maximum Operating Temperature |
| SE125AP | Splashproof | 125℃ [257℉] |
| SE125A | Sealed | 125℃ [257℉] |
| SE125B | Sealed | 125℃ [257℉] |
| Table B. SE125AP Product Dimensions and Part Number Descriptions | ||||
| Part No. | Color Code | Product Dimensions (Min.) | ||
| L | ØA | Wire Range (Min.-Max.) CMA/mm² | ||
| SE125AP-1 | Green | 1.37 [34.8] | 0.12 [2.9] | 1400-4800 [0.7-2.4] |
| SE125AP-2 | Red | 1.35 [34.2] | 0.15 [3.7] | 4000-8000 [2.0-4.0] |
| SE125AP-3 | Blue | 1.61 [41.0] | 0.2 [5.1] | 7000-16000 [3.5-8.0] |
| SE125AP-4 | Yellow | 1.65 [42.0] | 0.27 [6.8] | 15000-24000 [7.5-12.0] |
| Table C. SE125A-x Product Dimensions and Part Number Descriptions | ||||
| Part No. | Color Code | Product Dimensions (Min.) | ||
| L | ØA | Wire Range (Min.-Max.) CMA/mm² | ||
| SE125A-1 | Green | 1.37 [34.8] | 0.13 [3.4] | 1400-4800 [0.7-2.4] |
| SE125A-2 | Red | 1.35 [34.2] | 0.19 [4.8] | 4000-8000 [2.0-4.0] |
| SE125A-3 | Blue | 1.65 [42.0] | 0.29 [5.1] | 7000-16000 [3.5-8.0] |
| SE125A-4 | Yellow | 1.63 [41.5] | 0.36 [9.1] | 15000-24000 [7.5-12.0] |
| Table D. SE125B Product Dimensions and Part Number Descriptions | ||||
| Part No. | Color Code | Product Dimensions (Min.) | ||
| L | ØA | Wire Range (Min.-Max.) CMA/mm² | ||
| SE125B-1 | Green | 1.37 [34.8] | 0.13 [3.4] | 1400-4800 [0.7-2.4] |
| SE125B-2 | Red | 1.35 [34.2] | 0.19 [4.8] | 4000-8000 [2.0-4.0] |
| SE125B-3 | Blue | 1.65 [42.0] | 0.29 [7.3] | 7000-16000 [3.5-8.0] |
| SE125B-4 | Yellow | 1.63 [41.5] | 0.36 [9.1] | 15000-24000 [7.5-12.0] |
| Table E. Product Characteristics | |||
| Material | |||
| Insulation | Radiation-crosslinked, transparent heat-shrinkable polyvinylidene fluoride | ||
| Solder | |||
| SE125B | Solder: Sn42 Bi58 | ||
| SE125A, SE125AP | Solder: Sn60 Pb40 | ||
| Sealing insert (SE125B, SE125A, SE125AP) | Hot melt adhesive | ||
| Spiral wound insert | Copper alloy | ||
| Physical | Unit | Method of test | Requirement |
| Dimensions | Inches | RB-109 | See product dimensions |
| Electromechanical | Unit | Method of test | Requirement |
| Dielectric withstand voltage | kilovolts | RB-109 | 2 |
| Static heating | degrees | RB-109 | Less than 50℃ rise |
| Environmental* | Unit | Method of test | Requirement |
| Insulation resistance after water immersion (SE125A only) | Megohms | RB-109 | 100 |
| Contact resistance after testing | milliohms | RB-109 | Less than 6 milliohms |
| Operating Condition | Unit | Method of test | Requirement |
| Temperature rating | -- | -- | -55℃to +125℃ [-67℉to 257℉] |
| Voltage rating | V | -- | 600 |
*lmmersion resistance sealing is dependent on the wire combinations used. The user test specific wire combinations.
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