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“Unicoil” 10 mm
Tunable RF Inductors

New RoHS part numbers are shown. Lead was removed from terminations. The last character is now L to indicate RoHS compliance. (View old data sheet.)

Windings are precision molded into plastic for mechanical and electrical stability
Tuning is done by means of a threaded powdered iron core with a hex socket
Optional plated brass shield cans with solderable tabs provide integral shielding
Extremely economical, even in small quantities
Tune with our handy 3-in-1 "TriTuner" tuning wrench
Samples of all 7 mm and 10 mm values are available in Coilcraft Designer's Kit M302
RoHS-compliant. Terminations: Series 142 and 143 leads – Tin-silver over copper
Series 144 leads – Matte tin over copper
Shield can tabs – Tin-silver over nickel over brass

Photo Pricing Materials declaration PDF data sheet

SPECIFICATIONS

Dimensions

Unshielded


144-01J12L	Brown	1 1/2	53.0	56.0	59.0	62.0	140	1800	7.4	11.0
144-02J12L	Red	2 1/2	75.0	79.0	88.0	98.0	145	1150	8.6	10.0
144-03J12L	Orange	3 1/2	99.0	104	123	142	147	900	9.7	9.6
144-04J12L	Yellow	4 1/2	126	132	164	195	150	765	10.9	9.0
144-05J12L	Green	5 1/2	154	162	207	252	154	670	12.1	8.6
144-06J12L	Blue	6 1/2	182	193	250	306	154	610	13.6	8.1
144-07J12L	Violet	7 1/2	214	240	298	356	158	525	14.7	7.8
144-08J12L	Gray	8 1/2	245	283	344	405	160	465	15.9	7.5
144-09J12L	White	9 1/2	274	328	387	446	162	420	17.1	7.2
144-10J12L	Black	10 1/2	307	391	442	493	162	390	18.5	7.0

142-01J08L	Brown	1 1/2	63.0	63.0	65.0	68.0	115	980	7.4	13.4
142-02J08L	Red	2 1/2	92.0	93.0	100	107	118	600	8.4	12.5
142-03J08L	Orange	3 1/2	127	133	145	157	120	470	9.6	11.8
142-04J08L	Yellow	4 1/2	166	174	196	218	125	420	10.8	11.1
142-05J08L	Green	5 1/2	212	226	256	287	122	370	11.9	10.5
142-06J08L	Blue	6 1/2	258	275	315	355	112	340	13.2	10.0
142-07J08L	Violet	7 1/2	307	330	378	427	112	310	14.5	9.6
142-08J08L	Gray	8 1/2	357	396	450	504	106	290	15.7	9.2
142-09J08L	White	9 1/2	412	473	520	567	110	270	16.9	8.9
142-10J08L	Black	10 1/2	464	550	592	635	104	260	18.0	8.6

143-09J12L	White	9 1/2	385	404	550	693	86	280	16.7	7.3
143-10J12L	Black	10 1/2	438	460	624	788	90	270	17.9	7.1
143-11J12L	Brown	11 1/2	490	515	708	900	78	260	19.2	6.8
143-12J12L	Red	12 1/2	545	578	764	950	84	250	20.5	6.6
143-13J12L	Orange	13 1/2	600	673	845	1020	84	245	21.7	6.4
143-14J12L	Yellow	14 1/2	645	726	908	1090	82	240	22.8	6.3
143-15J12L	Green	15 1/2	692	803	978	1150	90	230	23.9	6.1
143-16J12L	Blue	16 1/2	765	891	1080	1270	74	225	25.2	6.0
143-17J12L	Violet	17 1/2	830	1010	1180	1340	74	215	26.4	5.8
143-18J12L	Gray	18 1/2	895	1100	1250	1400	92	195	27.6	5.7
143-19J12L	White	19 1/2	910	1200	1320	1440	98	190	28.9	5.6
143-20J12L	Black	20 1/2	960	1300	1400	1500	92	185	30.0	5.5

1	To order fixed inductance parts without cores, eliminate the “J08” or “J12”, e.g. 144-01.
2	Inductance and Q readings taken on Boonton 260-A Q meter with 16 AWG tinned copper ½" long soldered along leads and bent at 90° ¼" down from stand offs. All inductance values greater than 0.1 µH read at recommended Q meter frequency. All inductance values below 0.1 µH calculated from readings taken at 50 MHz.
3	L min measured with core halfway out top of form.
4	Q min measured at L nom at 40 MHz.
5	Irms: Current that causes a 40°C temperature rise from 25°C ambient. Details
6	Core material: Carbonyl J Core length: 142 Series - 1/4"; 143, 144 Series - 3/8".
7	Taps available in 144 Series parts at 1/8, 3/8, 5/8 and 7/8 turns.
8	Ambient temperature range:	–40°C to +85°C
9	Storage temperature range:	Component: –40°C to +85°C Packaging: –55°C to +80°C
10	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.

Shielded


144-01J12SL	Brown	1 1/2	50.0	52.0	53.0	54.0	97	2200	7.4	11.0
144-02J12SL	Red	2 1/2	67.0	70.0	74.0	78.0	98	1200	8.6	10.0
144-03J12SL	Orange	3 1/2	88.0	92.0	99.0	106	98	920	9.7	9.6
144-04J12SL	Yellow	4 1/2	106	111	122	133	100	790	10.9	9.0
144-05J12SL	Green	5 1/2	126	132	149	165	101	685	12.1	8.6
144-06J12SL	Blue	6 1/2	147	154	175	196	106	625	13.6	8.1
144-07J12SL	Violet	7 1/2	168	176	200	223	104	530	14.7	7.8
144-08J12SL	Gray	8 1/2	190	202	226	250	108	480	15.9	7.5
144-09J12SL	White	9 1/2	210	239	256	274	108	435	17.1	7.2
144-10J12SL	Black	10 1/2	232	270	282	295	106	420	18.5	7.0

142-01J08SL	Brown	1 1/2	58.0	58.0	59.5	61.0	82	1230	7.4	13.4
142-02J08SL	Red	2 1/2	81.0	84.0	86.0	89.0	83	650	8.4	12.5
142-03J08SL	Orange	3 1/2	110	115	120	121	85	550	9.6	11.8
142-04J08SL	Yellow	4 1/2	140	147	156	160	88	460	10.8	11.1
142-05J08SL	Green	5 1/2	174	182	197	205	94	410	11.9	10.5
142-06J08SL	Blue	6 1/2	210	220	240	248	94	370	13.2	10.0
142-07J08SL	Violet	7 1/2	247	259	280	290	90	330	14.5	9.6
142-08J08SL	Gray	8 1/2	284	299	322	337	86	320	15.7	9.2
142-09J08SL	White	9 1/2	319	338	363	377	88	310	16.9	8.9
142-10J08SL	Black	10 1/2	357	382	410	422	82	290	18.0	8.6

143-09J12SL	White	9 1/2	300	315	369	423	80	303	16.7	7.3
143-10J12SL	Black	10 1/2	338	355	416	477	82	290	17.9	7.1
143-11J12SL	Brown	11 1/2	377	396	468	540	78	270	19.2	6.8
143-12J12SL	Red	12 1/2	412	433	509	585	80	265	20.5	6.6
143-13J12SL	Orange	13 1/2	452	475	556	637	80	265	21.7	6.4
143-14J12SL	Yellow	14 1/2	490	515	604	693	78	260	22.8	6.3
143-15J12SL	Green	15 1/2	522	583	660	738	80	250	23.9	6.1
143-16J12SL	Blue	16 1/2	575	638	720	801	76	245	25.2	6.0
143-17J12SL	Violet	17 1/2	612	693	770	846	76	240	26.4	5.8
143-18J12SL	Gray	18 1/2	650	754	814	874	82	215	27.6	5.7
143-19J12SL	White	19 1/2	675	792	846	900	80	210	28.9	5.6
143-20J12SL	Black	20 1/2	715	847	896	945	74	200	30.0	5.5

1	To order fixed inductance parts without cores, eliminate the “J08” or “J12”, e.g. 144-01S.
2	Inductance and Q readings taken on Boonton 260-A Q meter with 16 AWG tinned copper ½" long soldered along leads and bent at 90° ¼" down from stand offs. All inductance values greater than 0.1 µH read at recommended Q meter frequency. All inductance values below 0.1 µH calculated from readings taken at 50 MHz.
3	L min measured with core halfway out top of form.
4	Q min measured at L nom at 40 MHz.
5	Irms: Current that causes a 40°C temperature rise from 25°C ambient. Details
6	Core material: Carbonyl J Core length: 142 Series - 1/4"; 143, 144 Series - 3/8".
7	Taps available in 144 Series parts at 1/8, 3/8, 5/8 and 7/8 turns.
8	Ambient temperature range:	–40°C to +85°C
9	Storage temperature range:	Component: –40°C to +85°C Packaging: –55°C to +80°C
10	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.

“Unicoil” 10 mm Tunable RF Inductors

SPECIFICATIONS

Unshielded

Shielded