Lexan 943A: specs and equivalent grades
NexPoint Materials (formerly SABIC) flame retardant, UV-stabilized polycarbonate (PC), medium viscosity, in transparent and tinted colors. Published data, grades from other producers to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Lexan 943A is a medium viscosity, flame retardant, UV-stabilized polycarbonate (PC) for injection molding, offered in transparent and tinted colors. A distributor listing describes its flame retardant as brominated. Lexan was a SABIC brand; since August 2026 it is sold by NexPoint Materials in the Americas and Europe, and SABIC still sells Lexan elsewhere. Published melt volume rate is 9.5 cm³/10 min, measured at 300°C / 572°F, 1.2 kg, ISO 1133, density is 1.20 g/cm³ (ISO 1183), and the sheet lists UL 94 V-0 at 3.0 mm and V-2 at 1.5 mm. Grades from other producers to ask about include Makrolon 6557, Wonderlite PC-6710 and Makrolon 6485. They are not identical, so compare the data sheets and run a trial before switching.
Also written as: Lexan 943A-110 (a color code seen on a distributor’s safety data sheet listing), LEXAN FR resin 943A. Lexan 943 and 943X are separate grades. Quote the full code from your drawing or bag label; color and additive suffixes change the grade.
Buying Lexan 943A: one gaylord to a railcar · supplier COA on every prime lot · ships from 22+ partner warehouse locations · a polymer chemist checks the grade code before we quote · we aim to quote within one to three business days
Have a part number or drawing callout?
Paste it as written. A polymer chemist will tell you which grade it calls for, suggest equivalents and quote it by email.
Lexan 943A specs from the data sheet
Typical values from the SABIC ISO data sheet for Lexan 943A (distributor copy; NexPoint says existing SABIC documents stay valid until they are reissued under its name). A few values on that copy are garbled (flexural modulus and notched Charpy), so we leave them out. Typical values are not specifications; the lot COA shows what you actually receive. Values only compare at the same test method and condition.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | NexPoint Materials in the Americas and Europe (formerly SABIC); SABIC elsewhere | Sheet shows SABIC Innovative Plastics; SABIC closed the sale of its Americas and Europe engineering thermoplastics business on Aug 3, 2026 |
| Polymer | Polycarbonate (PC), flame retardant, UV stabilized, medium viscosity | A distributor listing says the flame retardant is brominated |
| Process | Injection molding | |
| UL file | E45329-100506951 | UL Yellow Card number printed on the sheet |
| Melt flow | MVR 9.5 cm³/10 min | 300°C / 572°F, 1.2 kg, ISO 1133 |
| Density | 1.20 g/cm³ (ISO 1183) | |
| Mold shrinkage, flow | 0.50–0.70 % | Producer internal method, tensile bar |
| Water absorption, saturation / equilibrium | 0.35 % / 0.15 % | ISO 62, 23°C (equilibrium at 50% RH) |
| Tensile modulus | 2,350 MPa | ISO 527 |
| Tensile stress at yield / break | 63 MPa / 65 MPa | ISO 527, 50 mm/min |
| Tensile strain at yield / break | 6 % / 100 % | ISO 527 |
| Flexural stress | 90 MPa | ISO 178 |
| Notched Izod impact, 23°C / -30°C | 70 kJ/m² / 12 kJ/m² | ISO 180/1A |
| HDT 0.45 MPa / 1.8 MPa, unannealed | 136°C / 277°F; 125°C / 257°F | ISO 75, 120 × 10 × 4 mm bar |
| Vicat softening temperature | 141°C (B50); 142°C (B120) | ISO 306 |
| Relative temperature index | 130°C electrical; 120°C mechanical with impact; 125°C mechanical | UL 746 |
| Flammability | UL 94 V-0 at 3.0 mm; V-2 at 1.5 mm | UL 94, as printed on the ISO sheet; the SABIC ASTM sheet copy shows the same pattern (V-2 at 1.47 mm, V-0 at 3.0 mm). Check the UL Yellow Card for your wall thickness and color |
| Glow wire flammability index | 960°C at 1.6 mm; 850°C at 1.0 mm | IEC 60695-2-12 |
| Oxygen index | 35 % | ISO 4589-2 |
| Comparative tracking index | 225 V | IEC 60112 |
| Light transmittance, 2.54 mm | 88 % | ASTM D1003 |
| Drying | 120°C / 248°F for 2–4 h; max moisture 0.020 % | Producer processing data |
| Melt / mold temperature | 280–300°C (536–572°F) / 80–100°C (176–212°F) | Producer processing data |
| Food contact | The data sheet makes no food-contact statement. Ask for the producer’s regulatory letter for the exact grade and color. |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Grades to ask about instead of Lexan 943A
These grades from other producers have similar published specs. None is a drop-in replacement: flame retardant chemistry, UL listings by thickness and color, additive packages and approvals differ. If your part, drawing or customer approval names Lexan 943A, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Makrolon 6557 | Covestro | MVR 10 cm³/10 min (300°C / 572°F, 1.2 kg, ISO 1133) | 1.20 g/cm³ (ISO 1183) | UL 94 V-0 at 3.0 mm, V-2 at 1.5 mm and 0.75 mm; notched Izod 65 kJ/m² (ISO 180/A); HDT 124°C at 1.8 MPa (ISO 75); oxygen index 36 % | Closest match. Flame retardant, UV stabilized, medium viscosity, easy release, offered in transparent, translucent and opaque colors, with the same UL 94 pattern on the sheet (V-0 at 3.0 mm, V-2 at 1.5 mm). Covestro says regulated uses such as food contact or medical devices need its written approval. Quote this alternative › |
| Wonderlite PC-6710 | Chi Mei | 10 g/10 min (300°C / 572°F, 1.2 kg, ASTM D1238) | Specific gravity 1.20 (ASTM D792) | UL 94 V-0 at 3.0 mm; notched Izod 830 J/m (ASTM D256); HDT 125°C at 1.8 MPa, unannealed (ASTM D648); transmittance above 87 % at 2 mm (ASTM D1003) | Close match on paper. Transparent flame retardant PC; a distributor listing adds UV stabilized and UL 746C f1. Data are ASTM, so they do not compare directly with the ISO values for 943A. The sheet does not state the flame retardant type or plant; expect imported supply and confirm origin. Quote this alternative › |
| Makrolon 6485 | Covestro | MVR 9 cm³/10 min; MFR 10 g/10 min (300°C / 572°F, 1.2 kg, ISO 1133) | 1.20 g/cm³ (ISO 1183) | UL 94 V-0 at 1.5 mm, 5VA at 3.0 mm; glow wire index 960°C (IEC 60695-2-12); oxygen index 36 % | Partial match. Same flow class with a better flame rating at thinner walls, but opaque colors only and Covestro does not list UV stabilization. Covestro still lists it as a current grade; confirm North American supply before you plan a trial. Quote this alternative › |
From each producer's published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Lexan 943A
A distributor listing for Lexan 943A names these markets; the producer data sheet adds transparent and tinted colors and UV stabilization:
- Electrical components and lighting
- Kitchen appliances and general household goods
- Automotive interior and exterior parts
- General construction parts
- Mass transportation (the listing names aerospace)
- Clear or tinted parts that see light: the sheet lists 88 % light transmittance at 2.54 mm
What to check before you switch
- Brand owner change: in the Americas and Europe, Lexan 943A now comes from NexPoint Materials. NexPoint says product formulations and specifications are unchanged and that existing SABIC data sheets and certificates remain valid while documents are reissued. Ask for the current sheet and UL file under the new name if your approval references the producer.
- Check the flame rating at your wall thickness. The 943A sheet lists V-0 at 3.0 mm but V-2 at 1.5 mm. Makrolon 6557 shows the same pattern; Makrolon 6485 lists V-0 at 1.5 mm. If your drawing calls out a UL rating, check the exact Yellow Card for the color you buy. See UL 94 flame ratings explained.
- Flame retardant chemistry: a distributor listing says 943A uses a brominated flame retardant and points to Lexan 945U as a non-chlorinated, non-brominated option. If your customer restricts halogens, ask for the halogen statement for the exact grade.
- Polycarbonate must be dry. The 943A sheet asks for 120°C / 248°F for 2–4 hours and 0.020 % maximum moisture; wet PC splays and loses impact strength. See our resin drying guide.
- Compare melt flow, density and impact only at the same test condition and method (ASTM vs. ISO results differ).
- Ask for the producer’s food-contact or regulatory letter for the exact grade if the part needs one.
- Run a trial lot and check shrinkage, cycle time, color and flame performance before you switch production.
Buying Lexan 943A: price, lead time and lot size
- Lot size. From one gaylord to a railcar. See gaylord, LTL and truckload for typical weights per box.
- Where it ships from. 22+ partner warehouse locations. Material already in a partner warehouse usually moves sooner than a grade that has to come from the producer; your quote says which applies.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, color, ship-to region, and whether you need Lexan 943A itself or can accept a matched alternative. See how resin is priced (and our PC price per pound page) and the monthly market update.
- Paperwork. Supplier COA on every prime lot (what a COA shows). Ask for the producer’s regulatory letter or UL file if your part needs them.
- Trying an alternative? Start with one gaylord as a trial lot, molded and checked before you commit a full release.
- If Lexan 943A itself is not available. Some branded grades are sold only through the producer’s own channels or go on allocation. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade code, your annual volume and ship-to location. A polymer chemist checks it before we quote; we have been in the resin business for 30+ years. For several grades at once, use the resin RFQ template.
Trade names belong to their owners. ResinBridge is not affiliated with these producers; grade names are used only to identify the material. Data reflects published sheets as of October 2026.
Sources
- SABIC LEXAN 943A ISO data sheet (distributor copy, PDF)
- Ultrapolymers Lexan 943A product listing
- NexPoint Materials transition hub
- SABIC: completion of Americas and Europe ETP divestment (Aug 2026)
- Covestro Makrolon 6557 product data
- Chi Mei Wonderlite PC-6710 data sheet (distributor copy, PDF)
- Entec Wonderlite PC-6710 listing
- Covestro Makrolon 6485 product data
- SABIC LEXAN 943A ASTM data sheet (distributor copy)
Common questions
What is Lexan 943A?
Lexan 943A is a medium viscosity, flame retardant, UV-stabilized polycarbonate for injection molding, available in transparent and tinted colors. In the Americas and Europe it now comes from NexPoint Materials, the former SABIC engineering thermoplastics business.
What is the melt flow of Lexan 943A?
The ISO data sheet lists a melt volume rate of 9.5 cm³/10 min at 300°C / 572°F, 1.2 kg (ISO 1133).
What UL 94 rating does Lexan 943A have?
The data sheet lists UL 94 V-0 at 3.0 mm and V-2 at 1.5 mm. Check the UL Yellow Card for your exact color and wall thickness.
What is equivalent to Lexan 943A?
Grades from other producers to ask about include Makrolon 6557, Wonderlite PC-6710 and Makrolon 6485. None is identical; compare data sheets and run a trial, and get approval if your part names Lexan 943A.
Can ResinBridge supply Lexan 943A?
We quote Lexan 943A when our supply partners can source it. If they cannot, we say so up front and quote a matched alternative, named on the quote with its data sheet, so you can decide whether to trial it.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
Need Lexan 943A or an equivalent?
A polymer chemist reviews every request, then matches your grade or finds a matched alternative and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province
Quote Lexan 943A or a matched alternative
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