Telecom Transformers

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Part	Manufacturer	Transformer Type	Mounting Feature	Manufacturer Series	Approvals (V)	Terminal Finish	Impedance (Primary)	Impedance (Secondary)	No. of Winding (Primary)	Maximum Pulse Rise Time	Isolation Voltage	Insertion Loss	Inductance (Primary)	Packing Method	Minimum ET Product	Maximum DC Unbalance Current	No. of Winding (Secondary)	Sub-Category	Dimensions	Maximum Operating Temperature	Application	Minimum Operating Temperature	Height	Width	Nominal Input Voltage (V)	Load Resistance	Additional Features	JESD-609 Code	Minimum Operating Frequency	Length	Turns Ratio (Np:Ns)	Maximum Operating Frequency
SM-LP-5001E	Bourns	TELECOM TRANSFORMER	SURFACE MOUNT		UL	TIN SILVER COPPER	600 OHMS	600 OHMS	1			2 dB		TAPE & REEL			1	Other Transformers	L12.5XB9.6XH7.36 (mm)	85 Cel	MATCHING	-20 Cel	7.36 mm	9.6 mm		115 ohm	TURNS RATIO: 1:1, HEIGHT DIMENSIONS INCLUDE TERMINALS ALSO	e1	.2 KHz	12.5 mm	1:1	4 KHz
SM-LP-5001	Bourns	TELECOM TRANSFORMER	SURFACE MOUNT		UL	TIN SILVER COPPER	600 OHMS	600 OHMS	1			2 dB	3800000 uH	TUBE			1	Other Transformers	L12.5XB9.6XH7.36 (mm)	85 Cel	SIGNAL	-20 Cel	7.36 mm	9.6 mm		115 ohm	TURNS RATIO: 1:1, HEIGHT DIMENSIONS INCLUDE TERMINALS ALSO	e1	.2 KHz	12.5 mm	1:1	4 KHz
LM-NP-1001-B1L	Bourns	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		UL	MATTE TIN	600 OHMS	600 OHMS	1			1.5 dB	2800000 uH				1		L17.7XB17.7XH12.6 (mm)	60 Cel	SIGNAL	-10 Cel	12.6 mm	17.7 mm		66 ohm	TURNS RATIO: 1:1	e3	.2 KHz	17.7 mm	1:1	3.5 KHz
PE-65612NL	Pulse Electronics	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED						1	25 ns	2000 V		2500 uH	TUBE	20 V-us		1		L12.70XB8.89XH6.35 (mm)	70 Cel	SIGNAL	0 Cel	6.35 mm	8.89 mm			TURNS RATIO: 1:1, HEIGHT INCLUDES TERMINAL ALSO		100 KHz	12.7 mm	1:1	55000 KHz
PE-65415NL	Pulse Electronics	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		UL									TUBE					L12.7XB8.89XH6.35 (mm)	70 Cel		0 Cel	6.35 mm	8.89 mm			TURNS RATIO: 1CT:2CT			12.7 mm
50503	Wurth Elektronik	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED	50503	IEC; UL		135 OHMS	40.2 OHMS											L13.97XB13.97XH12.7 (mm)	85 Cel		-40 Cel	12.7 mm	13.97 mm			COMPATIBLE WITH SK70704/SK70706 CHIP SET; TURNS RATIO: 1.8:1			13.97 mm
750510578	Wurth Elektronik	TELECOM TRANSFORMER	SURFACE MOUNT		CSA, EN, IEC, UL									TR						85 Cel		-40 Cel	12.7 mm	13.46 mm	250		TURNS RATIO: 4.5:1; 1:1		5 KHz	17.75 mm		400 KHz
T3001NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	T3001	UL				1		1500 V			TAPE & REEL			1		L7.62XB7.0XH6.35 (mm)	85 Cel	SIGNAL	-40 Cel	6.35 mm	7 mm			TURNS RATIO: 1:1, HEIGHT DIM INCLUDES TERMINAL ALSO		200 KHz	7.62 mm	1:1	340000 KHz
T6003NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT				600 OHMS	600 OHMS						TRAY					L13.46XB17.65XH12.32 (mm)				12.32 mm	17.65 mm			TURNS RATIO: 1:1			13.46 mm
T1094NL	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	T1094	UL	Matte Tin (Sn)			2		1500 V		1200 uH	TUBE			2	Other Transformers	L12.83XB7.11XH6.22 (mm)	85 Cel	SIGNAL	-40 Cel	6.22 mm	7.11 mm			HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:1CT; 1CT:2CT	e3		12.83 mm	1CT:1CT/1CT:2CT
TTC-5023	Tamura	TELECOM TRANSFORMER	SURFACE MOUNT	TTC-5023	UL		600 OHMS	600 OHMS	1			2 dB	3800000 uH				1	Other Transformers	L12.5XB9.6XH7.59 (mm)		SIGNAL		7.59 mm	9.6 mm		115 ohm	HEIGHT INCLUDES TERMINAL		.2 KHz	12.5 mm	1:1	4 KHz
P2781	Etal Group Ab	TELECOM TRANSFORMER	SURFACE MOUNT		IEC; UL									TUBE		.1 mA			L13.0XB9.0XH7.0 (mm)	85 Cel		-25 Cel	7 mm	9 mm			LENGTH AND HEIGHT DIMENSION INCLUDES TERMINALS ALSO		.2 KHz	13 mm		4 KHz
MET-32	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED				600 OHMS													85 Cel		-20 Cel	11.8 mm	7.87 mm					.3 KHz	10.4 mm		100 KHz
MET-59	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED				600 OHMS	600 OHMS CT								3 mA			L10.4XB7.87XH11.8 (mm)				11.8 mm	7.87 mm					.3 KHz	10.4 mm		100 KHz
PE-65389NL	Pulse Electronics	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		UL				1		1500 V		1500 uH	TUBE			1	Other Transformers	L12.7XB8.89XH6.35 (mm)	70 Cel	SIGNAL	0 Cel	6.35 mm	8.89 mm		.9 ohm	TURNS RATIO: 1:1/1.26			12.7 mm	1:1/1.26
B4064	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	B4064										TRAY					13.46mm X 13.11mm X 12.07mm	85 Cel		-40 Cel	12.07 mm	13.11 mm			TURNS RATIO: 1:3.6; 2:3.6, COMPATIBLE WITH METALINK MTV9141; METALINK MTV9142			13.46 mm
T1094NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	T1094										TAPE & REEL					L12.83XB7.11XH6.22 (mm)	85 Cel		-40 Cel	6.22 mm	7.11 mm			HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:1CT; 1CT:2CT			12.83 mm
TTC-5024	Tamura	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL		600 OHMS													85 Cel		-20 Cel	5.08 mm	8.5 mm			TURNS RATIO: 1:1		.2 KHz	16.3 mm		4 KHz
82154R-LF1	Wurth Elektronik	TELECOM TRANSFORMER	SURFACE MOUNT		UL	Tin/Silver (Sn/Ag)			1				30 uH	TAPE & REEL			1	Other Transformers	L111.51XB232.16XH50.29 (mm)		SIGNAL		50.29 mm	232.16 mm		.35 ohm	BREADTH AND HEIGHT DIM INCLUDE TERMINAL ALSO, TURNS RATIO: 1CT:1.7	e2		111.51 mm	1:1.67
TG05-1205NXRL	Halo Electronics	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL															70 Cel		0 Cel	5.84 mm	12.19 mm			TURNS RATIO: 1:2; 1:2			27.94 mm
T-1281	Rhombus Industries	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED	T-1281																							DATA COUPLING
TG74-1505N1RL	Halo Electronics	TELECOM TRANSFORMER	SURFACE MOUNT																L12.7XB7.11XH5.08 (mm)	85 Cel		-40 Cel	5.08 mm	7.11 mm						12.7 mm
8517	Api Technologies	TELECOM TRANSFORMER	SURFACE MOUNT																	85 Cel		-40 Cel	8.64 mm	11.58 mm			TURNS RATIO: 1CT:2.3CT; 1CT:2CT			17.15 mm
PE-68678NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	PE-68678										TAPE & REEL					L12.83XB7.11XH6.22 (mm)	70 Cel		0 Cel	6.22 mm	7.11 mm			HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:1CT; 1CT:2CT			12.83 mm
PE-68786NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT											TAPE & REEL					L12.83XB7.11XH6.22 (mm)	70 Cel		0 Cel	6.22 mm	7.11 mm			HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:1.41CT; 1CT:1.41CT			12.83 mm
T1137NLT	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	T1137					2		1500 V		1200 uH	TAPE & REEL			2	Other Transformers	L12.83XB7.11XH6.22 (mm)	70 Cel	SIGNAL	0 Cel	6.22 mm	7.11 mm		.0012 ohm	HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:2.42CT; 1CT:2.42CT			12.83 mm	1CT:2.42CT/1CT:2.42CT
TX1287	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	TX1287	UL				2		1500 V		1200 uH	TUBE			2	Other Transformers	12.83mm X 7.11mm X 6.22mm	85 Cel	SIGNAL	-40 Cel	6.22 mm	7.11 mm		.7 ohm	HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:2.42CT; 1CT:2.42CT			12.83 mm	1CT:2.42CT/1CT:2.42CT
PE-65861NL	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT	PE-65861	UL									TUBE					L12.83XB7.11XH6.22 (mm)	70 Cel		0 Cel	6.22 mm	7.11 mm			HEIGHT DIM INCLUDES TERMINAL ALSO, TURNS RATIO: 1CT:2CT; 1CT:2CT			12.83 mm
PE-65415	Pulse Electronics	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED	PE-65415	UL									TUBE					L12.7XB8.89XH6.35 (mm)	70 Cel		0 Cel	6.35 mm	8.89 mm			TURNS RATIO: 1CT:2CT			12.7 mm
T3001NL	Pulse Electronics	TELECOM TRANSFORMER	SURFACE MOUNT		UL	Matte Tin (Sn)								TUBE					L7.62XB7.0XH6.35 (mm)	85 Cel		-40 Cel	6.35 mm	7 mm			TURNS RATIO: 1:1, HEIGHT DIM INCLUDES TERMINAL ALSO	e3	200 KHz	7.62 mm		340000 KHz
8005	Api Technologies	TELECOM TRANSFORMER	SURFACE MOUNT											TAPE & REEL						85 Cel		-40 Cel	6.502 mm	7.112 mm						12.827 mm
MET-46	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED				600 OHMS									3 mA			L10.4XB7.87XH11.8 (mm)				11.8 mm	7.87 mm						10.4 mm
TGSP-S125NM5RL	Halo Electronics	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL														L15.62XB7.11XH6.35 (mm)	70 Cel		0 Cel	6.35 mm	7.11 mm			TURNS RATIO: 1:2.4; 1:1			15.62 mm
8010	Api Technologies	TELECOM TRANSFORMER	SURFACE MOUNT											TAPE & REEL						85 Cel		-40 Cel	6.502 mm	7.112 mm						12.827 mm
AS8456-A	Coilcraft	TELECOM TRANSFORMER	SURFACE MOUNT	AS8456-A	UL														17.91mm X 13.46mm X 12.7mm	85 Cel		-40 Cel	12.7 mm	13.46 mm			DESIGNED TO USE WITH ANLG DVC AD20MSP910/918 CO/CPE, LG AND HEIGHT INCLUDES TERM, TURNS RATIO: 1:1			17.91 mm
MET-31	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED			Tin (Sn)	600 OHMS CT	600 OHMS CT												85 Cel		-20 Cel	11.8 mm	7.87 mm			TURNS RATIO : 1:1	e3	.3 KHz	10.4 mm		100 KHz
P1200	Etal Group Ab	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		CSA; IEC; UL		600 OHMS	600 OHMS								.1 mA				70 Cel		0 Cel	12.6 mm	18 mm					.05 KHz	18 mm		10 KHz
TGSP-S225NZRL	Halo Electronics	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL																		5.84 mm	12.19 mm			TURNS RATIO: 1CT:2.4CT; 1CT:1CT			17.78 mm
TTC-105-1	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		CSA, UL		600 OHMS																19 mm	16 mm			TURNS RATIO: 1:1		.66 KHz	20.7 mm		3.5 KHz
TTC-5020	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		CSA, UL		600 OHMS																13.8 mm	22.5 mm			TURNS RATIO: 1:1		.6 KHz	23.1 mm		3.5 KHz
TTC-5027	Tamura	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL		30000 OHMS	30000 OHMS												85 Cel		-20 Cel	7.6 mm	9.6 mm			TURNS RATIO: 1:1			12.5 mm
TTC-5035	Tamura	TELECOM TRANSFORMER	SURFACE MOUNT		EN, UL		600 OHMS	346 OHMS												85 Cel		-20 Cel	7.6 mm	9.6 mm			TURNS RATIO: 1:1		.2 KHz	12.5 mm		4 KHz
TTPC-13	Stancor Products	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED				600 OHMS	600 OHMS CT SPLIT								90 mA				105 Cel			15.88 mm	19.05 mm					.3 KHz	20.7 mm		3.5 KHz
51481	Wurth Elektronik	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED	51481	IEC		100 OHMS												L13.97XB13.97XH12.7 (mm)	85 Cel		-40 Cel	12.7 mm	13.97 mm			COMPATIBLE WITH EAGLE; EAGLE-II; AD6488; AD6485 CHIP SETS			13.97 mm
750510476	Wurth Elektronik	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		CSA, EN, IEC, UL															125 Cel		-40 Cel	10.16 mm	13.72 mm			TURNS RATIO: 1.307:1			19.8 mm
LM-LP-1005L	Bourns	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		UL		600 OHMS	600 OHMS											L17.7XB17.7XH12.6 (mm)	60 Cel		-10 Cel	12.6 mm	17.7 mm			TURNS RATIO: 1:1		.2 KHz	17.7 mm		3.5 KHz
MET-42	Tamura	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED				150 OHMS													85 Cel		-20 Cel	11.8 mm	7.87 mm			TURNS RATIO: 3.54:1		.3 KHz	10.4 mm		100 KHz
PE-65351NL	Pulse Electronics	TELECOM TRANSFORMER	THROUGH HOLE MOUNTED		UL				1		1500 V		1200 uH	TUBE			1	Other Transformers	L12.7XB8.89XH6.35 (mm)	70 Cel	SIGNAL	0 Cel	6.35 mm	8.89 mm		1.3 ohm	TURNS RATIO: 1:2CT			12.7 mm	1:2

Telecom transformers are a type of transformer used in telecommunications equipment to isolate and match impedance between different parts of a circuit. They are commonly used in applications such as modems, routers, switches, and telephone systems.

The primary function of a telecom transformer is to isolate the AC signal from the equipment to prevent noise and interference from other components in the circuit. Telecom transformers are also used to match impedance between the input and output stages of the circuit to ensure maximum power transfer and signal integrity.

Telecom transformers are typically designed to operate at low frequencies, ranging from a few Hz to several kHz, depending on the specific application. They are designed to handle low power levels and have low losses. The design of a telecom transformer is usually optimized for a specific frequency range and bandwidth.

Telecom transformers are typically constructed with a magnetic core made of ferrite or powdered iron, and one or more coils wound around the core. The coils are usually made of copper wire with a thin insulating layer. The number of turns and the size of the wire are determined by the required impedance transformation and the frequency range of the circuit.