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Midi Spring®

Air Core Inductors

Our Midi Spring® air core inductors have exceptionaly high Q factors and very tight inductance tolerances, making them suitable for narrowband RF amplifier matching and tuning applications. As their name implies, air core inductors do not use a magnetic core, resulting in high Q and the lowest possible losses for high-frequency applications. They can withstand high temperatures, meeting AEC-Q200 Grade 1 (−40°C to +125°C) requirements. High-reliability versions are available for space, military, and other critical applications.

Inductance values from 22 nH to 150 nH
Exceptionally high Q even at low frequencies; Handles up to 3.5 Amps current
Tight tolerance (as low as ±2%) can eliminate circuit tuning
Flat top jacket for mechanical stability and reliable pick and place operations
Solder coated leads ensure reliable soldering
AEC-Q200 Grade 1 (−40°C to +125°C)

立即购买:

零件号

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计数	单价
1	$0.96
250	$0.77
500	$0.67
1000	$0.60
2000	$0.40
5000	$0.26
10000	$0.19

对于大批量采购或非库存产品，点击这里请求报价。

Termination

L = Tin-silver

Packaging

C = 7" machine-ready reel

Tolerance

J = 5%

G = 2%

. 现货，可今天发货.

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零件号

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设计套件:

套件	电感值	价格
C318	11 (12 of each)	$40.00
C318-2	11 (12 of each)	$60.00

规格

Electrical specifications at 25°C.

零件号 1	电感 (nH) 2	公差 (%) 3	Q @ 150 MHz 4		SRF min (GHz) 5	DCR max (mΩ) 6	Irms (A) 7
零件号 1	电感 (nH) 2	公差 (%) 3	min	typ	SRF min (GHz) 5	DCR max (mΩ) 6	Irms (A) 7
1812SMS-22N	22	2,5	100	140	3.2	4.2	3.0
1812SMS-27N	27	2,5	100	140	2.7	4.0	3.5
1812SMS-33N	33	2,5	100	140	2.5	4.8	3.0
1812SMS-39N	39	2,5	100	140	2.1	4.4	3.0
1812SMS-47N	47	2,5	100	140	2.1	5.6	3.0
1812SMS-56N	56	2,5	100	140	1.5	6.2	3.0
1812SMS-68N	68	2,5	100	140	1.5	8.2	2.5
1812SMS-82N	82	2,5	100	150	1.3	9.4	2.5
1812SMS-R10	100	2,5	100	180	1.2	12.3	1.7
1812SMS-R12	120	2,5	100	180	1.1	17.3	1.5
1812SMS-R15	150	2,5	100	180	0.75	33.0	1.2

注释

When ordering, please specify tolerance, termination and packaging codes: e.g. 1812SMS-R12JLC
Inductance tested at 150 MHz on an Agilent/HP 4286A LCR meter or equivalent with a Coilcraft SMD-A test fixture and correlation.
Tolerances in bold are stocked for immediate shipment.
Q tested at 150 MHz on an Agilent/HP 4291A Impedance Analyzer with an Agilent/HP 16193 test fixture or equivalent.
SRF tested on the Agilent/HP 8753D Network Analyzer or equivalent and a Coilcraft CCF1248 test fixture.
DCR tested on the Cambridge Technology Model 510 Micro-ohmmeter or equivalent. For other operating temperatures, use this DCR at Temperature calculator.
Current that causes a 15°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.

公差:

G = 2%, J = 5% (Table above shows stock tolerances in bold.)

端子:

L = RoHS compliant tin-silver (96.5/3.5) over copper.
T = RoHS tin-silver-copper (95.5/4/0.5) over copper. (Special order, added cost)
S = non-RoHS tin-lead (63/37) over copper. (Special order, added cost)

包装:

C = 7″ machine-ready reel. EIA-481 embossed plastic tape, 500 parts per full reel. Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to C.
D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked, 2000 parts per full reel.

环境

环境:

符合RoHS

环境温度范围:

–40°C to +125°C with Irms current

储存温度范围:

Component: –40°C to +140°C.
Tape and reel packaging: –40°C to +80°C

最高元件温度:

+140°C (ambient + temp rise)

故障率（FIT）/平均故障间隔时间（MTBF）:

See FIT/MTBF Calculations

性能曲线

L vs Frequency

Q vs Frequency

物理特性

A max	B max	C max	D	E	F max
0.195	0.250	0.165	0.140 ±0.010	0.170 ±0.015	0.030
4,95	6,35	4,20	3,56 ±0,25	4,32 ±0,38	0,76

卷装规格

Parts per reel		Reel dimensions (mm)					Tape dimensions (mm)						Orientation
7" (178 mm)	13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
500	2000*	178/330	60/100	13	18,4	12,4	12	8	4	2	4,33	0,3

* Special order

一般规格

重量:

0.10– 0.16 g

包装:

500/7″ reel; 2000/13″ reel Plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing, 4.33 mm pocket depth

Temperature coefficient of inductance:

+5 to +70 ppm/°C

焊接/清洗

湿气敏感度等级（MSL）:

1 (unlimited floor life at <30°C / 85% relative humidity)

抗焊接热:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

焊接之前，请参阅焊接线艺元件。

推荐的取放吸嘴:

OD: 0.110 inch; ID: 0.091 inch

PCB清洗:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info

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