Datasheet 3D Model

ST312RAG Series

Chip Inductors for Critical Applications

ST312RAG Series offers higher Q and lower DCR than other 0603 inductors.

Highest SRF values – as high as 16 GHz.
43 inductance values from 1.8 to 150 nH.
Silver-palladium-platinum-glass frit terminations. Other terminations available at additional cost.

Request Quote:

Part number

Find my part

;

Specifications

Electrical specifications at 25°C.

Part number 1	Inductance (nH) 2	Tolerance (%)	900 MHz		1.7 GHz		Q min @ 250 MHz 3	SRF min (GHz) 4	DCR max (Ω) 5	Imax (mA)	Color code
Part number 1	Inductance (nH) 2	Tolerance (%)	L typ	Q typ 3	L typ	Q typ 3	Q min @ 250 MHz 3	SRF min (GHz) 4	DCR max (Ω) 5	Imax (mA)	Color code
ST312RAG1N8JLZ	1.8 @ 250 MHz	5	1.77	40	1.77	65	17	> 5.00	0.035	800	Black
ST312RAG2N2JLZ	2.2 @ 250 MHz	5	2.14	25	2.12	35	10	> 5.00	0.205	250	Yellow
ST312RAG3N3_LZ	3.3 @ 250 MHz	5,2	3.28	67	3.32	104	35	> 5.00	0.030	800	Blue
ST312RAG3N6_LZ	3.6 @ 250 MHz	5,2	3.59	70	3.62	116	32	> 5.00	0.033	800	Red
ST312RAG3N9_LZ	3.9 @ 250 MHz	5,2	3.88	68	3.95	108	33	> 5.00	0.045	800	Brown
ST312RAG4N3_LZ	4.3 @ 250 MHz	5,2	4.29	58	4.31	91	28	> 5.00	0.080	710	Orange
ST312RAG4N7_LZ	4.7 @ 250 MHz	5,2	4.65	48	4.71	75	22	> 5.00	0.100	720	Violet
ST312RAG5N1_LZ	5.1 @ 250 MHz	5,2	5.08	84	5.12	140	38	> 5.00	0.042	800	Green
ST312RAG5N6_LZ	5.6 @ 250 MHz	5,2	5.6	87	5.73	145	43	> 5.00	0.042	800	Black
ST312RAG6N0_LZ	6.0 @ 250 MHz	5,2	5.92	94	6.12	154	40	4.80	0.053	800	White
ST312RAG6N8_LZ	6.8 @ 250 MHz	5,2	6.83	88	7.05	143	34	4.64	0.050	800	Red
ST312RAG7N2_LZ	7.2 @ 250 MHz	5,2	7.25	96	7.38	139	36	4.32	0.080	800	Green
ST312RAG7N5_LZ	7.5 @ 250 MHz	5,2	7.55	81	7.85	112	32	4.24	0.100	800	Brown
ST312RAG8N2_LZ	8.2 @ 250 MHz	5,2	8.21	96	8.39	148	37	4.72	0.054	800	Orange
ST312RAG8N7_LZ	8.7 @ 250 MHz	5,2	8.73	97	9.0	149	33	4.40	0.054	800	Yellow
ST312RAG9N1_LZ	9.1 @ 250 MHz	5,2	9.18	76	9.64	109	38	4.08	0.054	800	Black
ST312RAG9N5_LZ	9.5 @ 250 MHz	5,2	9.56	98	9.99	149	40	3.92	0.053	800	Blue
ST312RAG10N_LZ	10 @ 250 MHz	5,2	10.16	90	10.64	142	38	3.44	0.054	800	Orange
ST312RAG11N_LZ	11 @ 250 MHz	5,2	11.06	78	11.82	108	36	3.28	0.075	800	Gray
ST312RAG12N_LZ	12 @ 250 MHz	5,2	12.26	69	13.2	91	32	3.28	0.110	750	Yellow
ST312RAG15N_LZ	15 @ 250 MHz	5,2	15.41	83	17.2	124	36	2.88	0.085	800	Green
ST312RAG16N_LZ	16 @ 250 MHz	5,2	16.37	77	18.7	116	32	2.80	0.095	790	White
ST312RAG18N_LZ	18 @ 250 MHz	5,2	18.56	76	20.9	100	34	2.64	0.075	800	Blue
ST312RAG22N_LZ	22 @ 250 MHz	5,2	22.7	77	25.9	88	30	2.52	0.140	600	Violet
ST312RAG23N_LZ	23 @ 250 MHz	5,2	24	69	29.53	80	36	2.40	0.195	560	Orange
ST312RAG24N_LZ	24 @ 250 MHz	5,2	24.9	77	28.9	91	43	2.36	0.085	800	Black
ST312RAG27N_LZ	27 @ 250 MHz	5,2	28.4	74	34	84	34	2.24	0.150	620	Gray
ST312RAG30N_LZ	30 @ 250 MHz	5,2	31.5	82	37.9	82	40	2.24	0.130	720	Brown
ST312RAG33N_LZ	33 @ 250 MHz	5,2	34.9	76	42.9	80	38	2.16	0.170	560	White
ST312RAG36N_LZ	36 @ 250 MHz	5,2	38.5	69	50	64	36	2.00	0.225	480	Red
ST312RAG39N_LZ	39 @ 250 MHz	5,2	41.5	78	51.9	74	38	1.96	0.190	540	Black
ST312RAG43N_LZ	43 @ 250 MHz	5,2	45.7	83	58.1	76	36	1.96	0.170	630	Orange
ST312RAG47N_LZ	47 @ 200 MHz	5,2	50.6	77	66.9	72	39	1.84	0.270	440	Brown
ST312RAG51N_LZ	51 @ 200 MHz	5,2	54.6	73	71.3	62	37	1.84	0.280	440	Blue
ST312RAG56N_LZ	56 @ 200 MHz	5,2	60.3	74	79.9	56	36	1.76	0.300	420	Red
ST312RAG68N_LZ	68 @ 200 MHz	5,2	75.5	73	113.3	49	37	1.60	0.330	400	Orange
ST312RAG72N_LZ	72 @ 150 MHz	5,2	80.8	69	-	-	36	1.52	0.420	380	Yellow
ST312RAG75N_LZ	75 @ 150 MHz	5,2	84.6	71	-	-	36	1.52	0.520	340	Violet
ST312RAG82N_LZ	82 @ 150 MHz	5,2	94	62	-	-	36	1.44	0.460	350	Green
ST312RAG91N_LZ	91 @ 150 MHz	5,2	103	64	-	-	36	1.32	0.580	310	White
ST312RAGR10_LZ	100 @ 150 MHz	5,2	114	69	-	-	36	1.36	0.540	340	Blue
ST312RAGR11_LZ	110 @ 150 MHz	5,2	126.2	63	-	-	35	1.28	0.580	310	Violet
ST312RAGR12_LZ	120 @ 150 MHz	5,2	142.4	61	-	-	36	1.24	0.720	280	Gray
ST312RAGR15_LZ	150 @ 150 MHz	5,2	188.8	57	-	-	36	1.08	0.820	260	White
ST312RAGR18_LZ	180 @ 100 MHz	5,2	232.2	50	-	-	36	1.04	1.500	190	Black
ST312RAGR20_LZ	200 @ 100 MHz	5,2	265	47	-	-	36	1.00	2.000	180	Green
ST312RAGR21_LZ	210 @ 100 MHz	5,2	288	45	-	-	36	0.96	2.000	170	Gray
ST312RAGR22_LZ	220 @ 100 MHz	5,2	315	41	-	-	35	0.88	2.000	170	Brown
ST312RAGR25_LZ	250 @ 100 MHz	5,2	-	-	-	-	35	0.84	3.000	130	Violet
ST312RAGR27_LZ	270 @ 100 MHz	5,2	-	-	-	-	35	0.84	2.250	160	Red
ST312RAGR30_LZ	300 @ 100 MHz	5,2	-	-	-	-	35	0.79	2.400	170	Green
ST312RAGR33_LZ	330 @ 100 MHz	5,2	-	-	-	-	36	0.74	3.600	130	Blue
ST312RAGR36_LZ	360 @ 100 MHz	5,2	-	-	-	-	36	0.74	4.000	120	Gray
ST312RAGR39_LZ	390 @ 100 MHz	5,2	-	-	-	-	36	0.70	4.000	120	Yellow

Notes

When ordering, specify tolerance, termination and testing codes: e.g. ST312RAGR39GLZ.
Inductance measured using a Coilcraft SMD-A test fixture and Coilcraft-provided correlation pieces with an Agilent/HP 4286A impedance analyzer or equivalent.
Q measured using an Agilent/HP 4291A with an Agilent/HP 16197A test fixture or equivalents.
SRF measured using an Agilent/HP 8753ES network analyzer or equivalent and a Coilcraft CCF1232 test fixture.
DCR measured on a Keithley 580 micro-ohmmeter or equivalent and a Coilcraft CCF1010 test fixture.

Tolerance:

G = 2%
J = 5%

Termination:

L = Silver-palladium-platinum-glass frit.
S = Tin-lead (63/37) over silver-palladium-platinum-glass frit. (Special order, added cost)
T = Tin-silver-copper (95.5/4/0.5) over silver-palladium-platinum-glass frit. (Special order, added cost)

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: –55°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

Packaging:

2000 per 7′′ reel Paper tape: 8 mm wide, 1 mm thick, 4 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.