Are you choosing S1150G for a halogen-free Tg150 FR4 PCB material but still unsure about its Tg value, datasheet properties, and real PCB applications? Shengyi S1150G is a practical mid-Tg FR4 material for projects that require halogen-free performance, lead-free process compatibility, and stable PCB fabrication.
This guide explains what this material is, how to read its datasheet, why Tg150, Tg155, and Tg160 may appear in different material references, whether HF means high-frequency, and how this laminate compares with standard FR4. It also shows where this material is commonly used and how EBest can support PCB fabrication from material review to finished board delivery.
What Is Shengyi S1150G PCB Material?
Shengyi S1150G is a halogen-free, lead-free compatible FR4 PCB material from Shengyi Technology. It belongs to the rigid PCB material family and is commonly used when a project needs a practical balance of cost, thermal stability, and environmental compliance.
It is often described as a mid-Tg FR4 material. Its material data lists it as a halogen-free, mid-Tg material with Tg 155°C, Td 355°C, and Z-axis expansion of 2.8%.
Compared with common FR4, this laminate is a better fit for designs that need halogen-free material documentation and lead-free process compatibility. It is widely used in rigid PCB designs, including consumer electronics, LED electronics, automotive electronics, and communication equipment.
In PCB fabrication, the material should be checked together with the full board requirement. Board thickness, copper thickness, layer count, surface finish, soldering profile, and quality standards all affect the final result.
Features of S1150G Halogen-Free Tg150 FR4 PCB Material
This laminate is a useful choice for projects that need halogen-free FR4 with mid-Tg thermal performance. It supports common PCB production processes and fits many electronic products that need lead-free assembly compatibility.
- Halogen-free material system
The material is described as free of halogen, antimony, and red phosphorus. This helps support halogen-free PCB requirements and cleaner material documentation. - Mid-Tg FR4 performance
The material is often searched as S1150G Tg 150, but its data lists Tg as 155°C by DSC. - Lead-free process compatibility
This FR4 grade is positioned as a lead-free compatible material, making it suitable for many modern PCB and PCBA production flows. - Good mechanical processability
It supports standard PCB drilling, routing, lamination, and finishing processes. - Thermal resistance for common PCB needs
Its data lists Td as 355°C, T260 as 60 minutes, and T288 as 45 minutes. These values support many lead-free PCB applications. - UL94 V-0 flame rating
Its material data lists flammability as V-0 under UL94 conditions.
Shengyi S1150G Datasheet Overview
The S1150G datasheet provides main thermal, electrical, and mechanical values for PCB material review. The table below lists common material data. Attached is a download link for Shengyi S1150G datasheet:
| Property | Typical Value | Test Condition / Method |
|---|---|---|
| Tg | 155°C | DSC, IPC-TM-650 2.4.25 |
| Td | 355°C | 5% wt. loss, IPC-TM-650 2.4.24.6 |
| Z-axis CTE before Tg | 40 ppm/°C | IPC-TM-650 2.4.24 |
| Z-axis CTE after Tg | 230 ppm/°C | IPC-TM-650 2.4.24 |
| Z-axis expansion, 50–260°C | 2.8% | IPC-TM-650 2.4.24 |
| T260 | 60 min | TMA, IPC-TM-650 2.4.24.1 |
| T288 | 45 min | TMA, IPC-TM-650 2.4.24.1 |
| Thermal Stress | >100s, no delamination | 288°C solder dip, IPC-TM-650 2.4.13.1 |
| Volume Resistivity | 1.15E+08 MΩ·cm | After moisture resistance, IPC-TM-650 2.5.17.1 |
| Surface Resistivity | 9.61E+06 MΩ | After moisture resistance, IPC-TM-650 2.5.17.1 |
| Arc Resistance | 178s | D-48/50+D-4/23, IPC-TM-650 2.5.1 |
| Dielectric Breakdown | 45+ kV NB | D-48/50+D-4/23, IPC-TM-650 2.5.6 |
| Dk at 1GHz | 4.5 | IPC-TM-650 2.5.5.9 |
| Dk at 1MHz | 4.8 | IPC-TM-650 2.5.5.9 |
| Df at 1GHz | 0.011 | IPC-TM-650 2.5.5.9 |
| Df at 1MHz | 0.009 | IPC-TM-650 2.5.5.9 |
| Peel Strength, 1oz HTE copper foil | 1.5 N/mm | After thermal stress, 288°C / 10s |
| Flexural Strength, LW | 630 MPa | IPC-TM-650 2.4.4 |
| Flexural Strength, CW | 480 MPa | IPC-TM-650 2.4.4 |
| Water Absorption | 0.10% | IPC-TM-650 2.6.2.1 |
| Flammability | UL94 V-0 | C-48/23/50 and E-24/125 |
What is the CTI Value of Shengyi S1150G?
The CTI value of Shengyi S1150G PCB laminate is no less than 600V and falls under Class 0 insulation grade. Its exceptional dielectric safety lays solid foundation for long-term stable operation in demanding electronic devices.
Class 0 qualification fully complies with stringent global safety standards, offering strong resistance against electric tracking under continuous high-voltage working conditions.
This high-performance substrate is widely deployed in high-voltage application areas, including industrial control systems, automotive electronics and primary power circuit designs.
It combines superior comparative tracking performance, remarkable CAF resistance and halogen-free material formula, balancing reliable operational capability and environmental compliance requirements.
What Is the Tg Value of Shengyi S1150G? Tg150, Tg155, or Tg160?
The practical answer is: Shengyi S1150G is commonly treated as a Tg150-class FR4 material, while its material data lists Tg as 155°C by DSC. This is why many people search for S1150G Tg 150 or Tg150 FR4.
The terms Tg150 and Tg155 are often used in the market to describe the same general material class. In formal material review, the exact test method matters. The Tg value is commonly listed as 155°C by DSC.
You may also see Tg160 in some material listings. This usually comes from a different test method, such as DMA, while DSC data may still show 155°C. The difference is related to test method rather than a simple material conflict.
For clearer documentation, it is better to write Shengyi S1150G or equivalent halogen-free FR4, Tg 155°C by DSC. This wording helps the PCB factory confirm the correct laminate and prepreg before production.
Is S1150G HF a High-Frequency Material?
No. S1150G HF is not a dedicated high-frequency PCB material. In PCB material naming, HF is often used to describe halogen-free laminates. For this laminate, that meaning is more accurate than treating it as an RF or microwave-grade material.
The material has Dk around 4.5 at 1GHz and Df around 0.011 at 1GHz. These values can support many standard FR4 PCB products, such as control boards, LED boards, automotive electronics, and general communication boards.
For RF antenna, radar, microwave, or very low-loss transmission applications, a dedicated RF laminate is usually a better choice. This product should be viewed as a halogen-free FR4 material with stable general-purpose PCB performance.
What Applications Use Shengyi S1150G PCB Material?
S1150G PCB material is used in many rigid PCB applications where halogen-free FR4, mid-Tg performance, and lead-free process compatibility are required. Typical application areas include consumer electronics, LED products, automotive electronics, communication equipment, and industrial control boards.
- Consumer electronics PCB: Tablets, notebooks, smart devices, and other compact electronic products.
- LED control PCB: LED drivers, lighting control boards, and lighting-related electronic assemblies.
- Automotive electronics PCB: Selected automotive control boards and electronic modules after project review.
- Communication equipment PCB: General communication products where dedicated low-loss RF material is not required.
- Industrial control PCB: Control modules, interface boards, power management boards, and automation-related products.
- Multilayer halogen-free PCB: Multilayer PCB fabrication when the stackup, prepreg, copper balance, and pressing process are properly controlled.
S1150G vs Standard FR4: What Is the Difference?
This material belongs to the FR4 family, but it offers a more specific material position than common FR4. Its value comes from halogen-free chemistry, mid-Tg performance, and lead-free process compatibility.
| Item | Shengyi S1150G FR4 | Standard FR4 |
|---|---|---|
| Material type | Halogen-free mid-Tg FR4.1 | General FR4 material family |
| Halogen-free status | Yes | Depends on selected grade |
| Tg value | 155°C by DSC | Commonly varies by grade |
| Td value | 355°C | Varies by grade |
| Lead-free process | Compatible | Must be confirmed |
| Dk / Df | Dk 4.5 and Df 0.011 at 1GHz | Varies by material system |
| Environmental positioning | Better fit for halogen-free requirements | Depends on material choice |
| Typical applications | Consumer, LED, industrial, automotive, communication PCB | General PCB production |
| Cost level | Usually higher than basic FR4 | Usually lower |
| Best fit | Projects needing halogen-free FR4 and mid-Tg performance | Cost-sensitive common PCB projects |
For projects with clear halogen-free requirements, FR4 S1150G is often a better fit than basic FR4. For simple boards without environmental material requirements, standard FR4 may still be enough.
How Does EBest Support S1150G PCB Fabrication?
EBest provides practical support for S1150G PCB fabrication, from material review to finished board delivery. Our goal is to help each project use the right material, reduce fabrication risk, and move smoothly from prototype to production.
- Material review: We can check whether Shengyi S1150G matches the drawing requirement, Tg note, halogen-free requirement, lead-free process, board structure, and production target.
- Free DFM review before fabrication: Our team reviews Gerber files, drill files, copper spacing, annular rings, solder mask clearance, routing design, panelization, and special fabrication notes before production starts.
- Multilayer stackup support: For multilayer boards, we can help review layer structure, laminate and prepreg matching, copper balance, dielectric thickness, impedance needs, and lamination feasibility.
- PCB fabrication from prototype to batch production: EBest supports prototype, small batch, and mass production, helping projects keep material choice, process control, and quality standards consistent.
- Controlled PCB manufacturing process: We support drilling, copper plating, solder mask, surface finish, routing, electrical testing, and final inspection with process control suitable for halogen-free FR4 boards.
- PCBA assembly and component sourcing: Beyond bare board fabrication, EBest can also provide component sourcing, SMT assembly, through-hole assembly, functional testing, and turnkey PCBA support.
- Quality inspection and testing: Our quality process can include incoming material checks, AOI, electrical testing, impedance testing when required, X-ray inspection for assembled boards, and final quality inspection.
- Traceability and production support: For industrial control, communication, automotive electronics, LED, and medical-related PCB projects, EBest can support production traceability and stable delivery from trial build to repeat orders.
- One-stop technical response: If your drawing only says S1150G material or S1150G FR4, EBest can help confirm whether additional details are needed, such as Tg method, copper thickness, surface finish, soldering process, and environmental documentation.
FAQs About Shengyi S1150G
Q1: Why is this laminate often selected for halogen-free PCB projects?
A1: It offers halogen-free chemistry, mid-Tg performance, and lead-free process compatibility. It is a practical FR4 choice for rigid PCBs that need cleaner material documentation and stable production performance.
Q2: Why do some drawings or searches call it S1150G Tg150?
A2: This material is often grouped into the Tg150-class FR4 category in the market. Its Tg is commonly listed as 155°C by DSC, while some references may show 160°C by DMA because of different test methods.
Q3: Which data matters when comparing this material with other FR4 materials?
A3: Useful data includes Tg, Td, T260, T288, Z-axis expansion, Dk, Df, water absorption, flame rating, and material compliance. These values help judge whether the laminate fits the product requirement.
Q4: Can this material support lead-free assembly?
A4: Yes. It is positioned as lead-free compatible FR4. The final result still depends on PCB thickness, copper design, moisture control, surface finish, and reflow conditions.
Q5: What file details help speed up an S1150G PCB quotation?
A5: Gerber files, stackup, finished board thickness, copper thickness, quantity, surface finish, solder mask color, impedance needs, assembly requirement, and any material certificates should be provided.
Q6: When should another material be considered instead of this laminate?
A6: Another material may be needed if the design requires lower dielectric loss, RF or microwave performance, higher Tg, special thermal conductivity, confirmed CTI grade, or project-specific approval.
Q7: What services can EBest provide for an S1150G PCB project?
A7: EBest can support PCB fabrication(including FR4 PCB, MCPCB, Ceramic PCB and so on), DFM review, multilayer PCB production, component sourcing, PCBA assembly, testing, and prototype-to-production support.
Get a Fast Quote for S1150G PCB
Looking for a reliable S1150G PCB fabrication partner for prototype, small batch, or production? Send us your Gerber files, stackup, board thickness, copper thickness, quantity, surface finish, and assembly requirements. EBest will review the material callout, check manufacturability, and provide a fast quotation with practical suggestions for PCB fabrication and assembly.
For faster support, email us at sales@bestpcbs.com. Our team will review your S1150G PCB requirements and help you move from material confirmation to finished board delivery with clear technical support and stable production control.
