22-04-1031 Connector: Complete Specs & Performance
Designers need a compact, reliable wire-to-board header for mixed signal and light-power tasks.
2.50 mm pitch, 3-position vertical through-hole header with ∼3 A rating and operating range of −40 °C to +105 °C.
These specifications govern thermal rise, routing density, and connector placement decisions on high-density PCBs.
Technical overview: what the 22-04-1031 connector is
Point: The part is a small-footprint wire-to-board header type intended for confined assemblies.
Evidence: Datasheet summaries classify it as a 2.50 mm pitch, 3-circuit vertical straight header for through-hole PCB mounting.
Explanation: That form factor makes it suitable for signal headers, short harnesses, and small power runs where board real estate and simple mating are priorities.
Performance Metrics Visualization
Form factor & intended use
Point: Functionally this family provides compact, low-profile board connections. Evidence: Typical use cases from catalog notes show vertical mating, three positions, and simple friction retention without complex latches. Explanation: For you, this means the header is best for internal harnesses, jumpers, or daughter-board interconnects rather than externally exposed, high-strain connectors.
Core mechanical dimensions
Point: Mechanical dimensions determine footprint and mechanical clearance. Evidence: Standard values include 2.50 mm pitch, three circuit spacing, and termination/post lengths intended for through-hole soldering. Explanation: When laying out the PCB, allocate correct pad annular rings and keep vertical clearance for the mating cable shroud to avoid interference.
Electrical & environmental specs that drive performance
| Parameter | Specification Value | Operating Impact |
|---|---|---|
| Current Rating | 3.0 A per circuit | Determines trace sizing & derating |
| Contact Resistance | Low milliohm level | Minimizes voltage drop |
| Plating Material | Tin or similar plating | Cost-effective; check for oxidation |
| Operating Temp | −40 °C to +105 °C | Suitable for industrial/consumer use |
Electrical ratings and limits
Evidence: Manufacturers commonly list low milliohm-level contact resistance and a 3 A rating; insulation resistance is typically >1 GΩ. Explanation: Measure four-wire contact resistance and allow margin for oxidation and transient loads.
Temperature, materials & plating
Evidence: Operating ranges down to −40 °C and up to +105 °C; contacts are usually brass or phosphor bronze. Explanation: Tin plating is cost-effective but consider higher-noble plating for harsh environments to preserve integrity.
Real-world performance and verification
Mechanical durability & mating cycles
Point: Wear mechanisms reduce contact reliability over repeated cycles. Evidence: Typical test protocols call out hundreds to low thousands of cycles for small headers. Explanation: For products with frequent service access, specify higher cycle-life or a mating pair with positive latch, and validate with mechanical testing.
Electrical performance under load
Point: Thermal rise from I²R losses affects long-term reliability. Evidence: Expect measurable temperature rise on the mating area at rated current. Explanation: Measure temperature rise under sustained current on a populated board and apply derating to limit solder joint fatigue.
Test & verification guide
Recommended bench tests
- Four-wire resistance to confirm milliohm-level contacts.
- Steady-state rise measurement at 3A rated current.
- Representative cycle test (e.g., 500 cycles).
PCB & assembly best practices
- Through-hole plating and correct pad diameters.
- Controlled solder profiles for joint integrity.
- Mechanical anchoring (epoxy/rivets) for high-strain boards.
Quick selection checklist
- ✓ Confirm 2.50 mm pitch
- ✓ Verify 3-position circuit count
- ✓ Match current needs (~3 A)
- ✓ Check operating temp (−40 to +105 °C)
- ✓ Validate mechanical clearance in CAD
Failure modes & fixes
Issue: Solder joint cracking or contact corrosion.
Fix: Optimize solder profiles, use selective gold plating for corrosive environments, and add strain relief for harnesses.
Summary / Conclusion
This compact wire-to-board header offers a practical balance between density and light-power capability. With a 2.50 mm pitch, three positions, a nominal ∼3 A rating, and an approximate −40 °C to +105 °C operating window, the part suits many signal and small power applications when used within spec. Prioritize footprint accuracy, bench validation (contact resistance and thermal rise), and mechanical support during selection to ensure reliable field performance and long-term assembly stability.
Key summary
- Confirm mechanical fit: Verify 2.50 mm pitch and mating height for enclosure constraints.
- Validate electrical limits: Perform four-wire resistance and temperature rise tests near 3 A rating.
- Mitigate wear: Choose appropriate plating and include mechanical anchoring for high-cycle life.
Frequently Asked Questions
How should you verify the 22-04-1031 connector contact resistance?
Point: Four-wire measurement gives reliable contact resistance data. Evidence: Use a Kelvin-configured meter with a mated pair and record values at ambient and after thermal soak. Explanation: Compare measured milliohm figures to the datasheet; increases indicate wear or contamination.
What are typical thermal considerations for continuous operation?
Point: Thermal rise from I²R losses can limit continuous current. Evidence: Sustained currents near 3A cause measurable temperature increases. Explanation: Measure steady-state temperature on the PCB and derate current if the rise approaches solder or material limits.
Which assembly checks prevent common failures?
Point: Combine footprint verification with solder and mechanical checks. Evidence: Inspect solder fillets and verify through-hole plating quality. Explanation: Early assembly checks catch bad pads and cold joints before full production runs.
