Audio Transformers

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Manufacturer

Hammond ManufacturingMurata ElectronicsPulse Electronics NetworkPulse Electronics PowerSumida America Components Inc.TamuraTE Connectivity AMP ConnectorsTriad MagneticsVisaton GmbH & Co. KG

Series

-*1011021041061071081091140117119

Packaging

-BoxBulkCut Tape (CT)Digi-Reel®Tape & Reel (TR)TrayTube

Part Status

ActiveDiscontinued at Digi-KeyLast Time BuyObsolete

Turns Ratio - Primary:Secondary

0.659:10.918:11:0.021:0.3971:0.51:0.5:0.51:0.7361:0.901:11:1, 1:2, 1:41:1, 2:11:1.033

Impedance - Primary (Ohms)

3.247.5, 3081616, 83030, 7.5/7.548, 12/1248CT5075

Impedance - Secondary (Ohms)

1.5 ~ 1522, 4, 82, 4, 8, 163.23.2, 4, 6, 83.2, 8, 163.2CT3.5, 8, 16, 250, 5004 ~ 3244, 8

DC Resistance (DCR) - Primary

250mOhm400mOhm510mOhm1.1Ohm, 1.24Ohm, 1.34Ohm1.18Ohm1.52Ohm2.4Ohm3.11Ohm4Ohm4.14Ohm4.4Ohm5.03Ohm, 12.3Ohm, 7.16Ohm

DC Resistance (DCR) - Secondary

20mOhm, 30mOhm, 50mOhm40mOhm, 3.76Ohm, 5.865Ohm70mOhm, 80mOhm, 6.14Ohm, 46.16Ohm74mOhm, 223mOhm, 258mOhm80mOhm, 4.75Ohm, 10.34Ohm80mOhm, 4.8Ohm, 44.94Ohm91mOhm, 183mOhm, 219mOhm100mOhm100mOhm, 1.68Ohm, 4.72Ohm100mOhm, 120mOhm120mOhm, 150mOhm, 210mOhm120mOhm, 190mOhm, 270mOhm

Transformer Type

-Audio CouplingBroadcast QualityData/Voice CouplingEconomical Open TypeGeneral PurposeImpedance MatchingLow Profile, Open TypeMiniature Epoxy PottedPush-Pull Audiophile, Ultra-Linear - Tube OutputPush-Pull Potted, Ultra-Linear - Tube OutputShieldedSingle Ended AudiophileSingle Ended Audiophile, Ultra-Linear - Tube Output

Frequency Range

20Hz ~ 20kHz30Hz ~ 15kHz30Hz ~ 20kHz30Hz ~ 22kHz30Hz ~ 30kHz50Hz ~ 10kHz50Hz ~ 12kHz50Hz ~ 15kHz50Hz ~ 19kHz60Hz70Hz ~ 10kHz70Hz ~ 11kHz

Frequency Response

-3dB-2.5dB ~ 0.3dB-2dB ~ 0.2dB-1.8dB ~ 0.5dB-1.6dB ~ 0.3dB-1dB ~ 0.7dB-1dB-0.35dB ~ 0.15dB±0.16dB±0.2dB±0.25dB±0.3dB ~ ±0.5dB

Voltage - Isolation

25V, 70V70V100V100VRMS120/240VAC200V250V250VAC @ 1 Sec400VDC500VRMS @ 1 Minute500VRMS @ 1 Second500VRMS @ 30 Seconds

Insertion Loss

-3.5dB Max @ 6-9MHz-1dB Max @ 100kHz ~ 100MHz0.5dB0.65dB Typ0.7dB0.75dB Max @ 1kHz0.8dB Typ0.9dB Typ1dB @ 200Hz, 1dB @ 1kHz, 1dB @ 20kHz, 1.9dB @ 100kHz1dB Max @ 1kHz1dB Max1dB Typ @ 1kHz

Return Loss

-18dB Min @ 1MHz ~ 30MHz-12dB Min @ 6-9MHz8dB Min @ 200Hz ~ 4kHz9dB10dB Typ12dB13dB Typ14dB Min @ 1.8kHz14dB Min @ 1kHz14dB Min @ 200Hz ~ 4kHz14dB Typ15dB Typ

Power Level

-45dB ~ 10dB-45dB ~ 7dB-40dB ~ 4dB-40dB ~ 7dB-20dB ~ 4dB3mW4mW5mW10mW Max @ 300Hz10mW12mW15mW

Operating Temperature

-40°C ~ 105°C-40°C ~ 125°C-40°C ~ 85°C-20°C ~ 85°C-10°C ~ 60°C0°C ~ 70°C-

Approval Agency

-CSA, URCSA-C22.2 No. 66-M1988, UL1459CSA-C22.2 No. 66-M1988, UL1862CSA-C22.2 No. 66-M1988, UL1863CSA-C22.2 No. 950-95, UL1950CSA-C22.2 No. 950-M89, UL1459, UL1950UL1950UL1950, UL60950UL1950, UL60950, EN60950UL60950UL60950, EN60950

Mounting Type

-Chassis MountSurface MountThrough Hole

Size / Dimension

0.256" L x 0.244" W (6.50mm x 6.20mm)0.272" L x 0.150" W (6.90mm x 3.80mm)0.280" L x 0.205" W (7.10mm x 5.20mm)0.330" L x 0.402" W (8.38mm x 10.20mm)0.335" L x 0.642" W (8.50mm x 16.30mm)0.375" L x 0.310" W (9.53mm x 7.87mm)0.378" L x 0.492" W (9.60mm x 12.50mm)0.390" L x 0.665" W (9.90mm x 17.80mm)0.390" L x 0.701" W (9.90mm x 17.80mm)0.409" L x 0.310" W (10.40mm x 7.87mm)0.410" L x 0.310" W (10.41mm x 7.87mm)0.450" L x 0.450" W (11.43mm x 11.43mm)

Height - Seated (Max)

0.138" (3.50mm)0.164" (4.16mm)0.173" (4.40mm)0.181" (4.60mm)0.193" (4.90mm)0.200" (5.08mm)0.244" (6.20mm)0.250" (6.35mm)0.285" (7.24mm)0.299" (7.60mm)0.346" (8.80mm)0.350" (8.89mm)

Termination Style

-Flat LeadGull WingPC PinScrew TerminalSolder LugWire Leads

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Mfr Part #	Price	Stock	Supplier	Mfr	Min Qty	DK Part #	Series	Package	Part Status	Turns Ratio - Primary:Secondary	Impedance - Primary (Ohms)	Impedance - Secondary (Ohms)	DC Resistance (DCR) - Primary	DC Resistance (DCR) - Secondary	Transformer Type	Frequency Range	Frequency Response	Voltage - Isolation	Insertion Loss	Return Loss	Power Level	Operating Temperature	Approval Agency	Mounting Type	Size / Dimension	Height - Seated (Max)	Termination Style

101F TRANSFORMER AUDIO 600CT/600CT Datasheet	$27.25000	461 - Immediate	Hammond Manufacturing	Hammond Manufacturing	1	HM1692-ND	101	Bulk	Active	1:1	600CT	600CT	44Ohm	52Ohm	Miniature Epoxy Potted	200Hz ~ 100kHz	±0.5dB	100VRMS	-	-	100mW	-40°C ~ 85°C	-	Through Hole	0.450" L x 0.450" W (11.43mm x 11.43mm)	0.480" (12.19mm)	PC Pin
107B TRANSFORMER AUDIO 150CT/12 Datasheet	$30.58000	496 - Immediate	Hammond Manufacturing	Hammond Manufacturing	1	HM2368-ND	107	Bulk	Active	3.53:1	150CT	12	22Ohm	1.85Ohm	Miniature Epoxy Potted	300Hz ~ 50kHz	±1.5dB	100VRMS	-	-	150mW	-	-	Through Hole	0.630" L x 0.586" W (16.00mm x 14.88mm)	0.630" (16.00mm)	PC Pin
107H TRANSFORMER AUDIO 600CT/600CT Datasheet	$30.58000	472 - Immediate	Hammond Manufacturing	Hammond Manufacturing	1	HM1693-ND	107	Bulk	Active	1:1	600CT	600CT	60Ohm	78Ohm	Miniature Epoxy Potted	300Hz ~ 50kHz	±1.5dB	100VRMS	-	-	150mW	-	-	Through Hole	0.630" L x 0.586" W (16.00mm x 14.88mm)	0.630" (16.00mm)	PC Pin
149U TRANSFORM AUDIO 150/600 TO 8 IMP Datasheet	$31.42000	152 - Immediate	Hammond Manufacturing	Hammond Manufacturing	1	HM1777-ND	149	Bulk	Active	-	600, 150/150	8	53Ohm	95Ohm	Economical Open Type	200Hz ~ 15kHz	±1dB	-	0.5dB	-	1000mW	-	-	Through Hole	1.060" L x 0.820" W (26.92mm x 20.83mm)	0.820" (20.83mm)	PC Pin
ESMIT-4180/C XFMR MODEM SMD Datasheet	$2.72000	15,780 - Immediate	Sumida America Components Inc.	Sumida America Components Inc.	1	308-2379-2-ND 308-2379-1-ND 308-2379-6-ND	ESMIT	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	-	-	-	250mOhm	250mOhm	-	-	-	3750Vrms	-	-	-	-40°C ~ 125°C	-	Surface Mount	0.280" L x 0.205" W (7.10mm x 5.20mm)	0.138" (3.50mm)	Gull Wing
T6003NLT TRANSFORMER AUDIO 1:1 SMD Datasheet	$9.84000	18,319 - Immediate	Pulse Electronics Network	Pulse Electronics Network	1	553-2102-2-ND 553-2102-1-ND 553-2102-6-ND	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	1:1	600	600	55Ohm	70Ohm	General Purpose	-	-	1500Vrms	1dB @ 200Hz, 1dB @ 1kHz, 1dB @ 20kHz, 1.9dB @ 100kHz	20dB @ 200Hz, 1dB @ 1kHz, 25dB @ 10kHz	-	-	-	Surface Mount	0.530" L x 0.516" W (13.46mm x 13.11mm)	0.485" (12.32mm)	Gull Wing
TY-311P TRANSF 600 OHM 0MA DC TEL Datasheet	$7.40000	2,792 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1132-ND	TY	Bulk	Active	1:1.05	600	600	38Ohm	53Ohm	Data/Voice Coupling	300Hz ~ 3.5kHz	±0.5dB	1500VAC	1dB Typ	26dB Typ	-45dB ~ 7dB	-20°C ~ 85°C	-	Through Hole	0.812" L x 0.715" W (20.62mm x 18.16mm)	0.740" (18.80mm)	PC Pin
TTC-5017 TRANSFORMER TELECOMM 600:600 OHM Datasheet	$7.67000	30,157 - Immediate	Tamura	Tamura	1	MT7207-ND	TTC	Bulk	Active	1:1	600	600	59Ohm	59Ohm	Data/Voice Coupling	200Hz ~ 4kHz	±0.5dB	1875VRMS @ 1 Second	1.5dB Max @ 1kHz	14dB Min @ 200Hz ~ 4kHz	-	-	UL60950	Through Hole	0.591" L x 0.571" W (15.00mm x 14.50mm)	0.472" (12.00mm)	PC Pin
TTC-264 TRANSF TELE 600/470 OHM 100MADC Datasheet	$7.73000	133 - Immediate	Tamura	Tamura	1	MT4123-ND	TTC	Bulk	Active	1:1	600	470	108Ohm	120Ohm	Data/Voice Coupling	300Hz ~ 3.5kHz	±1dB ~ ±4dB	1500VRMS @ 1 Minute	2.5dB Max @ 1kHz	-	-20dB ~ 4dB	-	CSA-C22.2 No. 66-M1988, UL1459	Through Hole	0.945" L x 0.906" W (24.00mm x 23.00mm)	0.472" (12.00mm)	PC Pin
TY-141P TRANSF 10K AUDIO CTAP/10K CTAP Datasheet	$8.01000	18,985 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1118-ND	TY	Bulk	Active	1:1	10kCT	10kCT	820Ohm	1.07kOhm	Data/Voice Coupling	200Hz ~ 15kHz	±2dB	1500V	1.5dB	26dB	100mW	-20°C ~ 85°C	-	Through Hole	0.812" L x 0.700" W (20.62mm x 17.78mm)	0.740" (18.80mm)	PC Pin
TY-145P TRANSF 600 AUDIO CTAP/600 CTAP Datasheet	$8.01000	9,707 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1121-ND	TY	Bulk	Active	1:1	600CT	600CT	44Ohm	58Ohm	Data/Voice Coupling	200Hz ~ 15kHz	±2dB	1500V	1.5dB	26dB	100mW	-20°C ~ 85°C	-	Through Hole	0.812" L x 0.700" W (20.62mm x 17.78mm)	0.740" (18.80mm)	PC Pin
TY-142P TRANSF 10K AUDIO CTAP/2K CTAP Datasheet	$8.01000	2,681 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1119-ND	TY	Bulk	Active	2.24:1	10kCT	2kCT	750Ohm	217Ohm	Data/Voice Coupling	200Hz ~ 15kHz	±2dB	1500V	1.5dB	26dB	100mW	-20°C ~ 85°C	-	Through Hole	0.812" L x 0.700" W (20.62mm x 17.78mm)	0.740" (18.80mm)	PC Pin
TY-307P TRANSF 600 OHM 0MA DC TEL Datasheet	$8.05000	4,620 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1130-ND	TY	Bulk	Active	1:1.07	600	600	43Ohm	61Ohm	Data/Voice Coupling	300Hz ~ 3.5kHz	±0.5dB	1500VAC	1dB Typ	26dB Typ	-45dB ~ 7dB	-20°C ~ 85°C	-	Through Hole	0.670" L x 0.781" W (17.02mm x 19.84mm)	0.470" (11.94mm)	PC Pin
TY-146P TRANSF 600 AUDIO CT 150/600CT 15 Datasheet	$11.44000	2,719 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1122-ND	TY	Bulk	Active	1:1	600, 150/150	600, 150/150	17Ohm, 19Ohm	14.5Ohm, 22Ohm	Data/Voice Coupling	200Hz ~ 15kHz	±2dB	1500V	1.5dB	26dB	1W	-20°C ~ 85°C	-	Through Hole	1.375" L x 1.187" W (34.93mm x 30.15mm)	1.187" (30.15mm)	PC Pin
MET-39-T TRANSFORMER 500:50 3.0MADC Datasheet	$14.49000	285 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1466-ND	MET	Bulk	Active	3.16:1	500	50	55Ohm	8Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 1 Second	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-39 TRANSFORMER 500:50 3.0MADC Datasheet	$15.07000	398 - Immediate	Tamura	Tamura	1	MT4155-ND	MET	Bulk	Active	3.16:1	500	50	55Ohm	8Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	500VRMS @ 30 Seconds	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-60 TRANSFORMER 135:135CT 10.0MADC Datasheet	$15.95000	3,031 - Immediate	Tamura	Tamura	1	MT7364-ND	MET	Bulk	Active	1:1	135	135CT	10.5Ohm	10.8Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1500VRMS @ 1 Minute	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-31-T TRANSFORMER 600CT:600CT 3.0MADC Datasheet	$15.65000	1,697 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1469-ND	MET	Bulk	Active	1:1	600CT	600CT	70Ohm	95Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 1 Second	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-32 TRANSFORMER 600:600CT 3.0MADC Datasheet	$15.74000	1,269 - Immediate	Tamura	Tamura	1	MT4151-ND	MET	Bulk	Active	2:1:1	600	600, 150/150	70Ohm	95Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 30 Seconds	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-35 TRANSFORMER 600CT:8 4.5MADC Datasheet	$16.07000	6,329 - Immediate	Tamura	Tamura	1	MT4153-ND	MET	Bulk	Active	8.66:1	600CT	8	60Ohm	1.5Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 30 Seconds	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-32-T TRANSFORMER 600:150/150 3.0MADC Datasheet	$16.07000	702 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1463-ND	MET	Bulk	Active	2:1:1	600	150/150	70Ohm	95Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 30 Seconds	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-59 TRANSFORMER 600:600CT 3.0MADC Datasheet	$16.38000	584 - Immediate	Tamura	Tamura	1	MT4152-ND	MET	Bulk	Active	2:1:1	600	600, 150/150	70Ohm	95Ohm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 30 Seconds	-	-	50mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-09-T-B TRANSFORMER 10KCT:10KCT 1.0MADC Datasheet	$18.26000	5,150 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1468-ND	MET	Bulk	Active	1:1	10kCT	10kCT	1kOhm	1.3kOhm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	500VRMS @ 1 Second	-	-	40mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
MET-09 TRANSFORMER 10KCT:10KCT 1.0MADC Datasheet	$18.92000	5,370 - Immediate	Tamura	Tamura	1	MT4145-ND	MET	Bulk	Active	1:1	10kCT	10kCT	1kOhm	1.3kOhm	Data/Voice Coupling	300Hz ~ 100kHz	±2dB	500VRMS @ 30 Seconds	-	-	40mW	-20°C ~ 85°C	-	Through Hole	0.409" L x 0.310" W (10.40mm x 7.87mm)	0.465" (11.80mm)	PC Pin
SP-33 TRANS 1K/50 OHM IMPEDANCE AUDIO Datasheet	$21.94000	1,518 - Immediate	Triad Magnetics	Triad Magnetics	1	237-1144-ND	Red-Spec	Bulk	Active	4.4:1	1k	50	145Ohm	8Ohm	Audio Coupling	300Hz ~ 100kHz	±2dB	1000VRMS @ 1 Second	-	-	50mW	-40°C ~ 85°C	-	Through Hole	0.410" L x 0.310" W (10.41mm x 7.87mm)	0.465" (11.80mm)	PC Pin

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Audio Transformers

Like most other transformer products, audio transformers consist of two or more magnetically coupled coils of wire, usually wound around a magnetic core. They are distinguished from other transformer types by being adapted and characterized for use at frequencies across all or a significant portion of the human audible range spanning roughly 20 Hz to 20 kHz, and are used for isolation and transformation of information in analog format, as contrasted with transformers designed for transmission of information encoded using a digital signaling protocol. Examples include output transformers for vacuum tube amplifiers and voice coupling transformers for traditional telecom applications.