Datasheet 3D Model

ST235RAQ Series

Chip Inductors for Critical Applications

ST235RAQ Series inductors offer up to 40% higher Q factor and 45% lower DCR than other 0402 series.

0402 ceramic wirewound chip inductor.
112 inductance values available from 0.8 nH to 120 nH, including 0.1 nH incremental steps from 2.8 nH to 10 nH.
Up to 40% higher Q factor and 45% lower DCR than other 0402 series.
Very high SRF – as high as 28.8 GHz.
Matte tin over nickel over silver-platinum-glass frit terminations.

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Specifications

Electrical specifications at 25°C.

Part number 1	Inductance (nH) 2	Tolerance (%) 3	900 MHz	1.7 GHz	2.4 GHz	Q min @ 250 MHz 4	SRF min (MHz) 5	DCR max (mΩ) 6	Imax at 125°C (mA) 7
Part number 1	Inductance (nH) 2	Tolerance (%) 3	Q typ 4	Q typ 4	Q typ 4	Q min @ 250 MHz 4	SRF min (MHz) 5	DCR max (mΩ) 6	Imax at 125°C (mA) 7
ST235RAQN80_RZ	0.8	5	54	62	110	18	> 5000	25	600
ST235RAQN90_RZ	0.9	5	42	65	89	13	> 5000	30	600
ST235RAQ1N0_RZ	1.0	5	41	66	91	14	> 5000	45	460
ST235RAQ1N2_RZ	1.2	5	27	40	51	8	> 5000	125	140
ST235RAQ1N7_RZ	1.7	5	62	82	159	22	> 5000	35	600
ST235RAQ1N8_RZ	1.8	5	63	81	153	21	> 5000	35	600
ST235RAQ1N9_RZ	1.9	5	63	103	149	22	> 5000	35	600
ST235RAQ2N0_RZ	2.0	5,3	60	93	127	26	> 5000	35	600
ST235RAQ2N1_RZ	2.1	5,3	47	72	94	19	> 5000	48	600
ST235RAQ2N2_RZ	2.2	5,3	43	65	92	17	> 5000	90	370
ST235RAQ2N3_RZ	2.3	5,3	43	64	85	17	> 5000	110	280
ST235RAQ2N4_RZ	2.4	5,3	40	60	80	12	> 5000	170	180
ST235RAQ2N5_RZ	2.5	5,3	31	45	59	11	> 5000	210	140
ST235RAQ2N8_RZ	2.8	5,3	57	86	130	21	> 5000	37	600
ST235RAQ2N9_RZ	2.9	5,3	59	89	136	21	> 5000	37	600
ST235RAQ3N0_RZ	3.0	5,3,2	61	92	142	25	> 5000	37	600
ST235RAQ3N1_RZ	3.1	5,3,2	63	100	148	27	> 5000	37	600
ST235RAQ3N2_RZ	3.2	5,3,2	65	108	154	27	> 5000	37	600
ST235RAQ3N3_RZ	3.3	5,3,2	68	116	160	28	> 5000	37	600
ST235RAQ3N4_RZ	3.4	5,3,2	66	108	156	27	> 5000	46	600
ST235RAQ3N5_RZ	3.5	5,3,2	67	110	156	27	> 5000	46	600
ST235RAQ3N6_RZ	3.6	5,3,2	68	112	157	28	> 5000	46	600
ST235RAQ3N7_RZ	3.7	5,3,2	68	112	157	28	> 5000	46	600
ST235RAQ3N8_RZ	3.8	5,3,2	69	113	158	27	> 5000	46	600
ST235RAQ3N9_RZ	3.9	5,3,2	69	114	158	30	> 5000	46	600
ST235RAQ4N0_RZ	4.0	5,3,2	70	114	158	30	> 5000	46	600
ST235RAQ4N1_RZ	4.1	5,3,2	71	115	159	27	> 5000	46	600
ST235RAQ4N2_RZ	4.2	5,3,2	71	116	159	29	> 5000	46	600
ST235RAQ4N3_RZ	4.3	5,3,2	62	100	136	28	> 5000	48	600
ST235RAQ4N4_RZ	4.4	5,3,2	64	102	139	26	> 5000	48	600
ST235RAQ4N5_RZ	4.5	5,3,2	65	104	141	26	> 5000	48	600
ST235RAQ4N6_RZ	4.6	5,3,2	66	106	143	29	> 5000	48	600
ST235RAQ4N7_RZ	4.7	5,3,2	67	108	146	28	> 5000	48	600
ST235RAQ4N8_RZ	4.8	5,3,2	67	109	146	25	> 5000	48	600
ST235RAQ4N9_RZ	4.9	5,3,2	67	110	147	25	> 5000	48	600
ST235RAQ5N0_RZ	5.0	5,3,2	68	111	149	25	> 5000	48	600
ST235RAQ5N1_RZ	5.1	5,3,2	68	111	150	27	> 5000	48	600
ST235RAQ5N2_RZ	5.2	5,3,2	68	112	151	24	> 5000	48	600
ST235RAQ5N3_RZ	5.3	5,3,2	67	110	144	26	> 5000	57	600
ST235RAQ5N4_RZ	5.4	5,3,2	68	111	145	26	> 5000	57	600
ST235RAQ5N5_RZ	5.5	5,3,2	68	111	145	26	> 5000	57	600
ST235RAQ5N6_RZ	5.6	5,3,2	69	112	146	29	> 5000	57	600
ST235RAQ5N7_RZ	5.7	5,3,2	69	112	146	27	> 5000	57	600
ST235RAQ5N8_RZ	5.8	5,3,2	70	112	146	27	> 5000	57	600
ST235RAQ5N9_RZ	5.9	5,3,2	70	112	146	28	> 5000	57	600
ST235RAQ6N0_RZ	6.0	5,3,2	71	112	146	27	> 5000	57	600
ST235RAQ6N1_RZ	6.1	5,3,2	71	112	146	28	> 5000	57	600
ST235RAQ6N2_RZ	6.2	5,3,2	71	112	146	30	> 5000	57	600
ST235RAQ6N3_RZ	6.3	5,3,2	72	113	146	27	> 5000	57	600
ST235RAQ6N4_RZ	6.4	5,3,2	73	113	146	28	> 5000	57	600
ST235RAQ6N5_RZ	6.5	5,3,2	73	114	147	27	> 5000	57	600
ST235RAQ6N6_RZ	6.6	5,3,2	68	109	130	27	> 5000	63	600
ST235RAQ6N7_RZ	6.7	5,3,2	69	109	132	27	> 5000	63	600
ST235RAQ6N8_RZ	6.8	5,3,2	69	110	138	29	> 5000	63	600
ST235RAQ6N9_RZ	6.9	5,3,2	69	110	138	26	> 5000	63	600
ST235RAQ7N0_RZ	7.0	5,3,2	69	110	138	26	> 5000	63	600
ST235RAQ7N1_RZ	7.1	5,3,2	69	110	138	28	> 5000	63	600
ST235RAQ7N2_RZ	7.2	5,3,2	70	111	139	29	> 5000	63	600
ST235RAQ7N3_RZ	7.3	5,3,2	70	111	139	27	> 5000	63	600
ST235RAQ7N4_RZ	7.4	5,3,2	70	111	140	26	> 5000	63	600
ST235RAQ7N5_RZ	7.5	5,3,2	71	112	140	26	> 5000	63	600
ST235RAQ7N6_RZ	7.6	5,3,2	72	113	141	27	> 5000	63	600
ST235RAQ7N7_RZ	7.7	5,3,2	70	109	135	27	> 5000	70	600
ST235RAQ7N8_RZ	7.8	5,3,2	70	110	136	27	> 5000	70	600
ST235RAQ7N9_RZ	7.9	5,3,2	71	110	136	28	> 5000	70	600
ST235RAQ8N0_RZ	8.0	5,3,2	71	111	137	27	> 5000	70	600
ST235RAQ8N1_RZ	8.1	5,3,2	71	112	137	29	> 5000	70	600
ST235RAQ8N2_RZ	8.2	5,3,2	72	113	138	30	> 5000	70	600
ST235RAQ8N3_RZ	8.3	5,3,2	72	113	138	28	> 5000	70	600
ST235RAQ8N4_RZ	8.4	5,3,2	72	114	139	28	> 5000	70	600
ST235RAQ8N5_RZ	8.5	5,3,2	73	115	139	29	> 5000	70	600
ST235RAQ8N6_RZ	8.6	5,3,2	73	115	140	30	> 5000	70	600
ST235RAQ8N7_RZ	8.7	5,3,2	73	116	140	29	> 5000	70	600
ST235RAQ8N8_RZ	8.8	5,3,2	74	116	141	29	> 5000	70	600
ST235RAQ8N9_RZ	8.9	5,3,2	74	117	141	30	> 5000	70	600
ST235RAQ9N0_RZ	9.0	5,3,2	75	117	142	30	> 5000	70	600
ST235RAQ9N1_RZ	9.1	5,3,2	75	118	142	28	> 5000	70	600
ST235RAQ9N2_RZ	9.2	5,3,2	75	118	142	29	> 5000	70	600
ST235RAQ9N3_RZ	9.3	5,3,2	71	105	142	27	> 5000	73	600
ST235RAQ9N4_RZ	9.4	5,3,2	72	106	143	26	> 5000	73	600
ST235RAQ9N5_RZ	9.5	5,3,2	73	108	144	26	> 5000	73	600
ST235RAQ9N6_RZ	9.6	5,3,2	74	109	145	27	> 5000	73	600
ST235RAQ9N7_RZ	9.7	5,3,2	75	110	146	27	> 5000	73	600
ST235RAQ9N8_RZ	9.8	5,3,2	76	112	147	27	> 5000	73	600
ST235RAQ9N9_RZ	9.9	5,3,2	77	113	148	28	> 5000	73	600
ST235RAQ10N_RZ	10.0	5,3,2	77	113	148	28	> 5000	73	600
ST235RAQ11N_RZ	11.0	5,3,2	68	100	134	29	4300	80	600
ST235RAQ12N_RZ	12.0	5,3,2	69	98	100	29	> 5000	80	600
ST235RAQ15N_RZ	15.0	5,3,2	70	100	110	29	> 5000	115	600
ST235RAQ16N_RZ	16.0	5,3,2	68	97	102	27	4800	120	600
ST235RAQ18N_RZ	18.0	5,3,2	68	95	98	29	4500	138	580
ST235RAQ20N_RZ	20.0	5,3,2	67	90	95	27	4100	163	530
ST235RAQ22N_RZ	22.0	5,3,2	67	88	83	28	4000	180	500
ST235RAQ23N_RZ	23.0	5,3,2	68	89	-	28	4000	180	500
ST235RAQ24N_RZ	24.0	5,3,2	63	85	-	27	3900	185	500
ST235RAQ27N_RZ	27.0	5,3,2	65	83	71	28	3700	193	480
ST235RAQ30N_RZ	30.0	5,3,2	62	76	62	27	3400	245	420
ST235RAQ33N_RZ	33.0	5,3,2	62	76	-	27	3400	275	400
ST235RAQ36N_RZ	36.0	5,3,2	60	72	-	27	3300	320	360
ST235RAQ39N_RZ	39.0	5,3,2	60	68	-	27	3100	375	350
ST235RAQ43N_RZ	43.0	5,3,2	55	54	-	27	3100	400	330
ST235RAQ47N_RZ	47.0	5,3,2	55	54	-	26	2700	400	330
ST235RAQ51N_RZ	51.0	5,3,2	55	54	-	26	2700	432	320
ST235RAQ56N_RZ	56.0	5,3,2	54	-	-	27	2600	690	240
ST235RAQ62N_RZ	62.0	5,3,2	54	-	-	27	2400	756	230
ST235RAQ68N_RZ	68.0	5,3,2	54	-	-	26	2300	943	210
ST235RAQ72N_RZ	72.0	5,3,2	54	-	-	27	2300	787	220
ST235RAQ75N_RZ	75.0	5,3,2	54	-	-	27	2200	882	220
ST235RAQ82N_RZ	82.0	5,3,2	51	-	-	26	2300	1057	190
ST235RAQ91N_RZ	91.0	5,3,2	48	-	-	26	2300	1119	190
ST235RAQR10_RZ	100.0	5,3,2	51	-	-	26	2000	1507	160
ST235RAQR12_RZ	120.0	5,3,2	46	-	-	26	1800	1600	160

Notes

When ordering, please specify tolerance, termination and testing codes: e.g. ST235RAQ5N9JRZ.
Inductance measured at 250 MHz using a Coilcraft SMD-F fixture in an Agilent/HP 4287 impedance analyzer with Coilcraft-provided correlation pieces.
Tolerances in bold are stocked for immediate shipment.
Q measured using an Agilent/HP 4991A with an Agilent/HP 16197 test fixture.
SRF measured using an Agilent/HP 8722ES network analyzer and a Coilcraft SMD-D test fixture.
DCR measured on a micro-ohmmeter and a Coilcraft CCF858 test fixture.
Maximum current that can be applied at 125°C.

Tolerance:

G = 2%
H = 3%
J = 5%

Table shows stock values and tolerances in bold.

Termination:

R = Matte tin over nickel over silver-platinum glass frit
P = Tin-lead (63/37) over tin over nickel over silver platinum-glass frit
Q = Tin-silver-copper (95.5/4/0.5) over tin over nickel over silver-platinum-glass frit

Testing:

Z = Unscreened
H = Group A screening per Coilcraft CP-SA-10001

All screening performed to the document’s latest revision.
Custom screening also available.

Environmental

Ambient temperature range:

–40°C to +125°C with Irms current.

Storage temperature range:

Component: –55°C to +140°C.
Tape and reel packaging: –40°C to +80°C.

Maximum part temperature:

+140°C (ambient + temp rise).

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Typical L vs Frequency

Typical Q vs Frequency

Physical characteristics

General specification

Core Material:

Ceramic

Weight:

0.7 – 1.0 mg

Packaging:

2000 or 10,000 per 7″ reel; Paper tape: 8 mm wide, 0.66 mm thick, 2 mm pocket spacing.

Temperature coefficient of inductance:

+25 to +125 ppm/°C.

Soldering/Washing

Moisture Sensitivity Level (MSL):

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

Resistance to soldering heat:

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

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash.
See Doc787_PCB_Washing.pdf.