CCA Flat Busbar

The CCA busbar is composed of a solid electrical grade aluminum core and an outer layer of high conductivity copper, manufactured through a unique lamination process. CCA busbar has the advantages of light weight and low cost, while retaining the surface characteristics of copper busbar, which makes CCA busbar an economical alternative to pure copper busbar.

Product type and coverage rate of MASTAR CCA busbar

Class 20A—Nominal 20 volume % copper, annealed.

Class 25A—Nominal 25 volume % copper, annealed.

Class 30A—Nominal 30 volume % copper, annealed.

Class 20H—Nominal 20 volume % copper, hard-worked.

Class 25H—Nominal 25 volume % copper, hard-worked.

Class 30H—Nominal 30 volume % copper, hard-worked

Class 45H—Nominal 45 volume % copper, hard-worked

Copper-clad aluminum bar product inventory size reference table

Copper-clad aluminum busbar product rated current meter

Size	Corner radius	Area	Weight	DC Resistance to 20ºC	DC Resistance to 65º C	n=1		n=2		n=3		n=4
mm	mm	mm2	g/m	μOhm /m	μOhm /m	DC	AC	DC	AC	DC	AC	DC	AC
10x3	0,5	29,79	0,108	890	1050	99	99	188	188	277	277	366	365
20x3	0,5	59,79	0.247	443	523	175	175	322	322	469	466	615	611
25x3	0,5	74,79	0.271	354	418	211	211	386	385	560	557	733	728
10x4	0,5	39,79	0,144	666	786	119	119	229	229	338	337	448	447
16x4	1,5	62,07	0,225	427	504	169	169	319	318	468	466	617	614
20x4	1	79,14	0,287	335	395	205	205	382	382	559	556	736	730
25x4	1	99,14	0,36	267	316	247	247	457	455	665	660	873	863
30x4	1	119,14	0,432	222	26	289	289	529	527	768	761	1007	991
40x4	1	159,14	0,627	164	194	373	372	676	670	977	961	1277	1242
10x5	0,5	49,79	0,181	532	628	137	137	266	266	395	394	525	522
12x5	0,5	59,79	0,217	443	523	157	157	304	304	451	449	597	594
15x5	sq	75	0,272	353	417	187	187	358	357	528	525	698	693
20x5	1,5	98,07	0,356	270	319	233	233	439	437	644	639	849	840
20x5	sq	100	0,363	265	313	235	235	443	441	650	646	858	848
25x5	1,5	123,07	0,447	215	254	280	280	522	519	763	755	1004	987
30x5	1,5	158,07	0,537	179	211	327	326	604	599	879	867	1154	1127
30x5	sq	150	0,545	177	209	329	328	607	603	885	872	1162	1134
40x5	1,5	198,07	0,719	134	158	418	416	762	752	1105	1079	1446	1388
40x5	sq	200	0,726	133	156	420	418	766	756	1110	1084	1453	1395
50x5	1,5	248.07	0.977	105	124	511	508	924	905	1334	1285	1743	1637
60x5	1,5	298.07	1,174	88	103	599	594	1077	1047	1550	1471	2022	1856
80x5	1,5	398.07	1,568	66	77	773	762	1376	1320	1971	1809	2565	2248
20x6	2	116,57	0,423	227	268	259	259	492	489	725	18	958	943
25x6	2	146,57	0,532	181	213	311	311	584	579	856	845	1128	1103
28x6	2	164,57	0,597	161	190	341	341	638	632	933	918	1228	1194
30x6	2	176,57	0,641	150	177	362	361	673	666	984	965	1294	1252
40x6	2	236,57	0,859	112	132	461	459	848	833	1232	1192	1615	1527
50x6	2	396,57	1077	89	105	559	555	1018	991	1473	1400	1927	1774
60x6	2,5	354,63	1287	75	88	653	646	1181	1140	1703	1590	2225	1995
75x6	2	446,57	1759	58	69	803	789	1440	1370	2069	1867	2696	2311
80x6	2	476,57	1878	55	65	851	834	1521	1441	2183	1950	2844	2406
120x6	2	716,57	2823	36	43	1222	1179	2155	1979	3075	2538	3990	3103
16x8	0,25	127,95	0,464	207	244	266	266	517	514	768	760	1019	1001
20x8	2	156,57	0,568	169	200	312	311	601	596	891	877	1180	1149
25x8	2	196,57	0,714	135	159	371	370	708	698	1044	1020	1380	1326
30x8	2	236,57	0,859	112	132	430	428	812	797	1193	1154	1573	1487
34x8	2	268,57	0.975	99	116	476	473	894	874	1309	1256	1725	1608
40x8	2	316,57	1149	84	99	545	540	1014	985	1481	1399	1947	1777
50x8	2	396,57	1440	67	79	658	649	1211	1161	1760	1620	2309	2030
60x8	2	476,57	1730	56	66	769	755	1403	1328	2033	1820	2661	2259
75x8	2	596,57	2166	44	52	933	908	1686	1568	2432	2090	2177	2573
80x8	2	636,57	2311	42	49	987	958	1779	1644	2564	2175	3346	2674
90x8	2	716,57	2601	37	44	1094	1057	1963	1795	2824	2338	3681	2871
100x8	2	796,57	2892	33	39	1201	1154	2146	1942	3080	2494	4012	3061
10x10	sq	100	0,363	265	313	225	225	439	438	654	649	869	859
12x10	1	119,14	0,432	222	263	253	252	493	491	734	727	975	959
12x12	sq	144	0,523	184	217	290	289	568	563	845	834	1123	1098
15x10	1	149,14	0,541	178	210	295	294	575	570	855	843	1134	1108
15x10	sq	150	0,545	177	209	296	295	577	572	857	845	1138	1111
20x10	3	192,27	0,698	138	163	357	356	695	686	1032	1009	1369	1317
20x10	sq	200	0,726	133	156	365	363	709	699	1052	1027	1396	1340
25x10	3	242,27	0,879	109	129	425	422	820	804	1214	1173	1609	1518
25x10	sq	250	0,908	106	125	431	429	833	816	1234	1189	1634	1536
30x10	3	292,27	1061	91	107	491	487	937	913	1383	1317	1829	1687
30x10	sq	300	1089	88	104	497	493	949	923	1401	1331	1853	1703
40x10	3	392,27	1424	68	80	619	611	1165	1116	1708	1575	2251	1984
40x10	sq	400	1452	66	78	625	617	1176	1126	1725	1586	2273	1996
50x10	3	492,27	1787	54	64	746	731	1385	1306	2023	1801	2659	2242
50x10	sq	500	1815	53	63	751	736	1396	1314	2038	1810	2680	2252
60x10	3	592,27	2150	45	53	870	848	1601	1484	2329	2004	3055	2478
60x10	sq	600	2178	44	52	875	853	1612	1492	2344	2012	3075	2488
63x10	3	622,27	2259	43	50	907	882	1665	1536	2420	2063	3173	2547
75x10	3	742,27	2694	36	42	1053	1015	1918	1737	2778	2282	3635	2814
80x10	3	792,27	2876	33	39	1114	1070	2023	1819	2925	2371	3825	2921
80x10	sq	800	2904	33	39	1119	1074	2033	1825	2939	2378	3843	2930
100x10	3	992,27	3602	27	32	1353	1282	2434	2135	3504	2711	4571	3330
100x10	sq	1000	3630	27	31	1358	1287	2443	2141	3518	2718	4589	3338
120x10	3	1192,27	4328	22	26	1589	1488	2837	2439	4071	3032	5301	3713
18x12	sq	216	0,784	123	145	383	381	746	734	1108	1078	1471	1401
20x12	3	232,27	0,843	114	135	406	404	790	776	1174	1137	1558	1476
24x12	sq	288	1045	92	109	471	468	916	893	1361	1298	1806	1670
30x12	sq	360	1307	74	87	558	552	1077	1038	1596	1487	2114	1890
40x12	3	472,27	1714	56	66	693	681	1316	1243	1938	1737	2559	2176
42x12	sq	504	1830	53	62	727	712	1376	1292	2023	1794	2671	2241
50x12	3	592,27	2150	45	53	831	809	1559	1440	2284	1966	3009	2440
60x12	3	712,27	2586	37	44	961	934	1796	1625	2621	2173	3445	2690
100x12	3	1192,27	4328	22	26	1496	1399	2709	2301	3812	2913	5111	3581
120x12	3	1432,27	5199	19	22	1755	1617	3151	2625	4534	3248	5912	3981
24x15	sq	360	1307	74	87	548	542	1069	1031	1589	1480	2109	1885
40x15	3	592,27	2150	45	53	798	778	1636	1417	2272	1956	3009	2440
50x15	3	742,27	2694	36	42	953	918	1809	1618	2663	2188	3517	2723
60x15	3	892,27	3239	30	35	1105	1052	2075	1806	3043	2407	4010	2988
120x15	3	1792,27	6506	15	17	1985	1786	3594	2861	5190	3543	6782	4347
32x16	3	504,27	1831	53	62	702	688	1365	1283	2029	1799	2692	2258

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Copper clad aluminum busbar product performance

• Good electrical conductivity: When the copper volume ratio is 15% or 20%, the electrical performance of copper-clad aluminum is compared with that of pure copper, and its AC current carrying capacity is 85% of that of pure copper.
• Light weight: The density of copper-clad aluminum is only 37%-40% of pure copper, and the length of the same weight (volume) is 2-2.5 times that of pure copper.
• Strong copper bonding: Two atomic crystals between different metal materials achieve permanent bonding at various ambient temperatures without any physical defects.
• Excellent processability: After special heat treatment, it has good ductility and reliability, suitable for punching, cutting and bending, and the product will not crack or separate. To improve corrosion resistance, tin-plated and galvanized copper surface products are available .

MASTAR copper-clad aluminum busbar and related product display

To ensure excellent conductivity and mechanical stability, MASTAR's copper-clad aluminum busbars are built with high-purity electrical-grade aluminum cores, typically using alloys such as 1050, 1060, 1070, or 1350, 1370. These aluminum cores offer a well-balanced combination of high conductivity, light weight, and good workability — making them ideal for both low-voltage and high-voltage power distribution applications.

Want to learn more about the joining technology behind CCA products? Visit our blog on Copper-Aluminum Joining Techniques to explore the advanced bonding methods that ensure durability and performance in composite conductors.

MASTAR copper clad aluminum bar products industrial cooperation area

• High and low voltage distribution switch cabinet busbar (copper-clad aluminum busbar).
• High and low voltage busbars, conductor rails (copper-clad aluminum busbars).
• Transformer windings, reactor windings (copper-clad aluminum flat wire).
• Various types of copper and aluminum bimetal connectors.

MASTAR's copper-clad aluminum busbars are widely used across a range of electrical infrastructure applications — from low and high voltage switchgear, transformer windings, to wind power systems and conductor rails. We also provide solutions for tubular buspipes, aluminum-copper hybrid busbars, and specialized transformer strips. If you have any Explore our full range of application solutions:

Copper- clad aluminum busbar—the most cost-effective choice

• Compared to copper conductors, weight reduced by 60%.
• Compared to copper conductors, costs reduced by up to 40%.
• Compared to aluminum conductors, surface contact resistance decreased by 60%.

Click to view more about copper and aluminum product selection [9 Major Differences Between Aluminum and Copper Busbar]