Explanation of Part No. System
1 2 3 4 5 6 7 8 9 10 11 12 13 14
The standard Part No. includes 14 digits with the following explanation
(
标准料号包括
14
位数字，注释如下
):
1. 1
st
~4
th
digits (
第
1
位
~
第
4
位
):
a) This is to indicate the SMD Resistor size. Example (
表示晶片电阻的尺寸，例如
): 1206, TC05 or HV03;
b) For Resistor Network & Coated type, the 1
st
~3
rd
digits are to indicate the product type and the 4
th
digit is the special feature. Example: RNLA =
Resistor Newtork Circuit A type; CFRF = Carbon Film Fixed Resistors Non-Flame type; MORI = Metal Oxide Film Fixed Resistor Non-Inductive type.
网络电阻和涂装型电阻第
1
位到第
3
位表示产品类型，第
4
位表示特殊形态，如
: RNLA =
网络电阻
A
型
; CFRF =
不燃性碳膜电阻器
; MORI =
无感型金属氧化
膜电阻器
。
c) For Cement Fixed Resistors, these 4 digits are to indicate the product type but if the product type has only 3 digits, the 4
th
digit will be "0". Example:
PRW0=PRW type; PRWC=PRWC type.
水泥型前
4
位表示产品类��，如果产品只有
3
个字母，第
4
位为
0
，
例：
PRW0=PRW
型
; PRWC=PRWC
型。
2. 5
th
~ 6
th
digits (
第
5
位
~
第
6
位
):
a) This is to indicate the wattage or power rating. To distinguish the sizes and the numbers, the following codes are used, and please refer to the
following chart for details: W = Normal Size; S = Small Size; U = Ultra Small Size; “1” ~ “G” to denotes “1” ~ “16” as Hexadecimal:
表示产品标识功率，为区别不同尺寸，同时使用以下字母，如 :
W =
正常尺寸
; S =
小尺寸
; U =
超小尺寸 ; “
1
” ~ “
G
” 代表
“
1
” ~ “
16
”为
16
进制
。
b) For power rating less than 1W, the 5
th
digit will be the letters W, S or U to represent the size required & the 6
th
digit will be a number or a letter code. Example: WA
= 1/10W; U2 = 1/2W-SS (
功率小于
1
瓦 , 第
5
位用
W, S
或
U
表示尺寸要求，第
6
位将是数字或字母，例 :
WA = 1/10W; U2 = 1/2W-SS.
).
c) For power rating of 1W to 16W, the 5
th
digit will be a number or a letter code and the 6
th
digit will be the letters of W, S or U. Example: AW = 10W; 3S = 3W-S.
当功率为
1
到
16
瓦 , 第
5
位将是数字或字母，第
6
位是
W, S or U.
例
: AW = 10W; 3S = 3W-S.
d) For power rating between 20W to 99W, the 5
th
& 6
th
digits will show the whole numbers of the power rating itself. Example: 20 = 20W; 75 = 75W.
当功率在
20
瓦
~99
瓦之间第
5
位至第
6
位全部表示功率。例
: 20 = 20W; 75 = 75W.
e) For power rating of 100W & over, the 5
th
& 6
th
digits will be indicated with "00" and the actual wattge being indicated at the last 3 digits (12
th
~14
th
) of the Part No.
当大于
100
瓦时第
5
位和第
6
位表示为
“00”
实际功率表示在料号最后
3
位
(12
位
~ 14
位
)
f) For special power ratings, the following codes are bo be used (
特殊功率用下列数字表示
):
1). WH = 1/32W (10P8 Chip Network
网络电阻
) 2). 07 = 3/4WS [Chip 2010 size (
晶片
2010
尺寸
)]
3). 04 = 0.4W-SS (0.4 watt Ultra Small size
超小尺寸
) 4). 06 = 0.6W-S (0.6 watt Small size
小尺寸
)
5). 2A = 2.5W 6). 6A = 6.5W 7). WK= 2/3W 8). WJ =1.5W 9). 1.25W =1Q
g) For Resistor Network, since the power rating is xed as 1/8W for A circuit & 1/5W for B circuit, the 5
th
& 6
th
digit is to be used to denote the number of pins
required. Example: 09 = 9pins; 12 = 12pins. (
网络电阻功率固定为
1/8W
或
1/5W
，
故第
5
位和第
6
位用来表示所需要的
pins
数 . 例
: 09 = 9pins; 12 = 12pins.
)
h) For Jumper Wires the 5
th
& 6
th
digits will be indicated with "00" .(
跳线电阻的第
5
位、第
6
位用 “
00
”来表示 )
i) For Thin Film Chip Resistors, these 2 digits will be used to indicated the requested Temperature coecient:
对於薄膜晶片电阻产品 , 这两位用来表示产品的温度系数要求 :
1). 05 = 5PPM 2). 10 = 10PPM 3). 15 = 15PPM 4). 25 = 25PPM 5). 50 = 50PPM
3. The 7
th
digit is to denote the Resistance Tolerance. The following letter code is to be used for indicating the standard Resisance Tolerance. As for Metal Film Fixed
Resistor products, it is also to denote the standard PPM as follows (
第
7
位表示阻值误差。下列数码用来表示标准误差，用于金属膜产品时，同时用来表示标
准
PPM
，如下
):
B = ±0.1% (15PPM) G = ±2% (100PPM) A = ±0.05%
C = ±0.25% (25PPM) J = ±5% (200PPM) T = ±0.01%
D = ±0.5% (50PPM) K = ±10%
F = ±1% (50PPM)
Remark: if it is not one of the above standard "tolerance-TCR", the requirement should be clearly stated when placing order.
Example: ±1% (25PPM), the 7
th
digit still shows “F” but separately note the requirement of “25PPM”
Wattage
功率
1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/9 1/10 1/11 1/12 1/13 1/14 1/15 1/16
Normal Size
正常尺寸
W2 W3 W4 W5 W6 W7 W8 W9 WA WB WC WD WE WF WG
Small Size
小尺寸
S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC SD SE SF SG
Ultra Small Size
超小尺寸
U2 U3 U4 U5 U6 U7 U8 U9 UA UB UC UD UE UF UG
Wattage
功率
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Normal Size
正常尺寸
lW 2W 3W 4W 5W 6W 7W 8W 9W AW BW CW DW EW FW GW
Small Size
小尺寸
1S 2S 3S 4S 5S 6S 7S 8S 9S AS BS CS DS ES FS GS
Ultra Small Size
超小尺寸
1U 2U 3U 4U 5U 6U 7U 8U 9U AU BU CU DU EU FU GU
1/16W ~ 1/2W (<1W)
1W ~ 16W (≥1W)
料号系统注释
注
:
如果一个不是上述标准
“
公差
-PPM”
的要表示清楚
例
: ±1% (25PPM),
第
7
位要标示
“F”
并另注
“25PPM”
01
4. The 8
th
to 11
th
digits is to denote the Resistance Value (
第
8
位
~
第
11
位表示阻值
):
a) For the standard resistance values of E-24 series in 5% & 10% tolerance, the 8
th
digit is "0", the 9
th
& 11
th
digits are to denote the signicant
gures of the resistance and the 11
th
digit is the number of zeros following (
对于
E-24
系列的
5%
、
10%
产品，第
8
位数是
0
，第
9
位数和第
10
位数表
示阻值的有效数，第
11
位表示有几个
0
。
).
b) For the standard resistance values of E-96 series in ≤2% tolerance, the 8
th
digit to the 10
th
digits are to denote the signicant gures of the
resistance and the 11
th
digit is the number of zeros following (
对于
E-96
系列
≤2%
的产品，第
8
位数到第
10
位数表示阻值的有效数，第
11
位数表示有
几个
0
).
c) For the code to the signicant gures to E-24 & E-96 series, please refer to page 170 & 171 of the standards Resistance Value list.(
有效数
E-24
和
E-96
系列
,
请参考
170
页和
171
页标准阻值表
)
d) The following numbers and the letter codes is to be used to indicate the number of zeros in the 11
th
digit:
以下数字及字母用来表示第
11
位数有几个
0:
0 = 10
0
1 = 10
1
2 = 10
2
3 = 10
3
4 = 10
4
5 = 10
5
6 = 10
6
J = 10
-1
K = 10
-2
L = 10
-3
M = 10
-4
N = 10
-5
P = 10
-6
e) For Cement Resistors the 8
th
digit will be coded with "W" or "P" to denote Wire-wound type or Power Film type respectively of the Cement
Fixed Resistor proudct. The 9
th
to 11
th
please refer to point 4.a (
水泥电阻第
8
位数
"W"
或
"P"
用来表示绕线型或切割型，第
9
位数到第
11
位数请参考
4.a
)
Example (
例
):
E-24 series
系列
E-96 series
系列
Cement Resistors
水泥型固定电阻值
0120 = 12 ohm 1210 = 121 ohm W120 = 12 ohm Wire-wound type
绕线型
0123 = 12K ohm 1302 = 13K ohm W12J = 1.2 ohm Wire-wound type
绕线型
012J = 1.2 ohm 196J = 19.6 ohm P273 = 27 kohm Powe Film type
切割型
5. The 12
th
, 13
th
& 14
th
digits (
第
12
位数、
13
位数和
14
位数
):
a) The 12
th
digit is to denote the Packaging type with the following codes (
第
12
位数表示包装方式，采用如下代码
):
A = Tape / Box (Ammo Pack) [
编带
/
盒装（带装）
] C = Bulk in Cassette (for Chip product)[
散装盒（晶片产品）
]
B = Bulk / Box (
散装
/
盒装
) T = Tape / Reel (
编带
/
卷装
) P = Tape / Box of PT-26 product [
编带
/
盒装（
PT-26
产品）
]
b) The 13
th
digit is normally to indicate the Packing Quantity of Tape/Box or Tape/Reel packaging types. Except for Chip products Bulk packing,
this digit should be lled "0" or other products with "Bulk/Box packaging requirement. The following letter codes is to be used for some
packaging quantities (
第
13
位数一般表示包装数量对于
T/B
或
T/R
型，��了晶片散装外，其他产品的散装包装用
“0”
表示数量。下列字母说明包装数量
).
A = 500pcs (
只
) B = 2,500pcs (
只
) C = 10,000pcs (
只
) N = 12,500pcs (
只
) E = 15,000pcs (
只
)
D = 20,000pcs (
只
) G = 25,000pcs (
只
) L = 45,000pcs (
只
) H = 50,000pcs (
只
) J = 60,000pcs (
只
)
Example (
例
):
CHIP product (
晶片产品
) Other products (
其它产品
)
TD = T/R-20,000 A5 = T/B-5,000
TE = T/R-15,000 TB = T/R-2,500
T4 = T/R-4,000 B0 = B/B
(
可提供标准包装
)
c) For the Forming type products, the 13
th
& 14
th
digits are used to denote the forming types of the product with the following letter codes
(
对于成型产品第
13
位数和第
14
位数用来表示成型产品，如下字母表示
):
MF = M type with Flattened lead wire (
M
型��扁加工
) F0 = F type
型
MK = M type with Kinked lead wire (
M
型打弯加工
) F1 = F1 type
型
ML = M type with normal lead wire (
M
型加工
) F2 = F2 type
型
MC = M type with kinked lead wire (
M
型打弯加工
) F3 = F3 type
型
d) For power rating over 100watt, the 12
th
to the 14
th
digits are to denote the actual wattage of the products
(
当功率超过
100W
时，它的第
12
位数到
14
位数用来表示产品的实际功率
):
Example (
例
): 100 = 100watt (
瓦
) 150 = 150watt (
瓦
) 225 = 225watt (
瓦
)
e) For some products, the 14
th
digit alone can use to denote special features or additional information with the following codes
(
对于某些产品第
14
位可以显示特性和附加信息，如下字母
):
P = Panasert type (
Panasert
型
) 1 = Avisert 1 type (
Avisert 1
型
) 2 = Avisert 2 type (
Avisert 2
型
)
3 = Avisert 3 type (
Avisert 3
型
) A = CO 1/4W - A type (
切割型
CO 1/4W-A
型
) B = CO 1/4W - B type (
切割型
CO 1/4W-B
型
)
E = used to denote the “Environment Protection, lead Free type” of SMD category resistors (now, this became the Standard type of SMD)
(
晶片电阻，晶片排阻及网络电阻器
“
环保无铅型
”
)
Explanation of Part No. System
料号系统注释
02