Jiangsu Sunzo Spring Elasticity Technology Co., Ltd

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Precision Compression Spring for Connectors with Sub-millimeter Accuracy, 10⁶

China Precision Compression Spring for Connectors with Sub-millimeter Accuracy, 10⁶

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Precision Compression Spring for Connectors with Sub-millimeter Accuracy, 10⁶

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Price： Negotiable
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Contact resistance	<50mΩ
Wire diameter range	0.08-1.5mm
Diameter monitoring resolution	±0.0005mm
Force variation	<2%
Salt spray resistance	1000-hour
Temperature cycling range	-40°C to 85°C
Post-cycle resistance	<100mΩ
Packaging Details	Carton
Payment Terms	Negotiable
Temperature range	-40°C to 125°C
Force accuracy	±0.5%
Working stroke	0.5-5mm
Elastic decay	<1%
Delivery Time	Negotiable
Force range	0.1-50N
Load variation	<±1%
Frequency range	up to 40GHz
Initial contact resistance	<50mΩ
Electrical conductivity	98%
Surface roughness	Ra <0.2μm
Surface defect detection	5μm
Insertion loss	<0.1dB
Wire diameter tolerance	±0.001mm
Certification	CE/IATF16949/45001/14001/9001
Place of Origin	Sihong, China
Brand Name	Sunzo

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Product Specification


Contact resistance	<50mΩ	Wire diameter range	0.08-1.5mm
Diameter monitoring resolution	±0.0005mm	Force variation	<2%
Salt spray resistance	1000-hour	Temperature cycling range	-40°C to 85°C
Post-cycle resistance	<100mΩ	Packaging Details	Carton
Payment Terms	Negotiable	Temperature range	-40°C to 125°C
Force accuracy	±0.5%	Working stroke	0.5-5mm
Elastic decay	<1%	Delivery Time	Negotiable
Force range	0.1-50N	Load variation	<±1%
Frequency range	up to 40GHz	Initial contact resistance	<50mΩ
Electrical conductivity	98%	Surface roughness	Ra <0.2μm
Surface defect detection	5μm	Insertion loss	<0.1dB
Wire diameter tolerance	±0.001mm	Certification	CE/IATF16949/45001/14001/9001
Place of Origin	Sihong, China	Brand Name	Sunzo
High Light	stable contact helical spring ，stable contact compression spring ，1.5mm helical spring

Compression Spring for Precision Connectors: Micro-Precision Engineering for Stable Contact and 10⁶ Cycle Reliability

In the electronics industry, precision connectors demand compression springs that deliver sub-millimeter dimensional accuracy, consistent contact force, and long-term reliability—critical for applications like 5G communication modules, medical device interfaces, and automotive infotainment systems.

Advanced Material Selection

316L Stainless Steel: 1000-hour salt spray resistance (ASTM B117) for humid electronics environments, with Ra <0.2μm electropolished surface to prevent contact resistance buildup.

Beryllium Copper (C17200): 98% electrical conductivity for signal-carrying contacts, ideal for high-frequency connectors (up to 40GHz) with <50mΩ contact resistance after 10⁶ cycles.

Nitinol (NiTi): Shape memory alloy maintaining stable force output across -40°C to 125°C, suitable for automotive underhood connectors.

Precision Manufacturing Process

• Diamond-tipped micro-coiling with real-time laser diameter monitoring (±0.0005mm resolution) for wire diameters 0.08-1.5mm

• Automated optical inspection (AOI) detecting surface defects as small as 5μm, ensuring compliance with IPC-A-610 Class 3 standards

• Vacuum annealing at 380°C to eliminate residual stress, achieving <1% elastic decay over 10⁶ compression cycles

Rigorous Performance Validation

• Dynamic load testing (0.1-50N force range) with ±0.5% accuracy per ISO 17256

• Temperature cycling (-40°C to 85°C, 1000 cycles) with <2% force variation, simulating harsh operating conditions

• Contact resistance measurement: <50mΩ initial, <100mΩ after 10⁶ operations (per IEC 60669-1)

Field Application Performance

5G Base Station Connectors: Beryllium copper springs maintaining signal integrity with <0.1dB insertion loss over 10⁶ mating cycles

Medical Device Interfaces: 316L springs with ISO 10993-5 biocompatibility, supporting 2000+ autoclave cycles without performance degradation

Automotive Infotainment: Nitinol springs withstanding -40°C to 125°C thermal cycling, reducing connector failure rates by 92%

Quality Assurance: Backed by ISO 9001:2015 quality management and RoHS/REACH compliance. We offer custom design services, including finite element analysis of contact force distribution and material selection optimization for specific connector geometries.

Company Details

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Business Type:

Manufacturer,Exporter,Seller 
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Year Established:

2006 
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Total Annual:

1.2M-1.4M
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Employee Number:

160~200 
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Ecer Certification：

Verified Supplier 

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Jiangsu Sunzo Spring Elasticity Technology Co., Ltd
No.20, Xinghuo Road, Nanjing High-tech Development Zone
https://www.spring-disc.com/

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