Audio transformer: VOOHU WHTT6010 replaces Bourns SM-LP-5001 comparison report

#1. Product introduction of friendly merchants (Bourns)

The Bourns SM-LP-5001 is a 600 Ω, 1:1 surface mount audio transformer commonly used in low frequency signal interfaces in modems, laptops, telecommunications and instrumentation. Its frequency band of concern is 200 Hz–4 kHz. Insertion loss, return loss and frequency response should be viewed together with line impedance and peripheral networks. The windings on both sides of this model are symmetrical, and Bourns does not distinguish between the primary and secondary windings in the actual sense.

#2. Introduction to VOOHU alternative products (Suzhou VOOHU Electronic Technology Co., Ltd.)

The VOOHU WHTT6010 is a 6-pin audio transformer with a terminal pitch of 2.54 mm. When making early selection, first look at the 1±1% turns ratio, 115 Ω ±15% DC resistance on both sides, and the inductance, insertion loss, return loss and frequency response test conditions from 200 Hz to 4 kHz. These conditions are comparable to the application range of SM-LP-5001, and are suitable for comparison in the same round of selection; whether it can be replaced depends on the PCB pad, withstand voltage requirements, test circuit and sample test results.

#3. Comparison of core parameters

Below we put together the parameters that are most frequently looked at during early selection. The test conditions for items such as return loss and withstand voltage are different. Similar values ​​do not mean they can be directly replaced.

1. 1.Bourns' return loss needs to be evaluated in its recommended circuit (BS6305 impedance Class A non-speech or Class B speech); VOOHU's reference impedance is 600 Ω. When making selection, first align the actual test circuit with the reference conditions.
2. 2.The withstand voltage test conditions on both sides are different: Bourns is 2000 VRMS, 1 min; VOOHU is 4600 VAC, 1 mA, 60 sec between P-S. Don't judge the insulation capability just by looking at the voltage value, let alone directly draw alternative conclusions based on it.
3. 3.Bourns also lists information such as operating/storage temperature, balance, distortion, power level, terminal plating and packaging; VOOHU does not have directly corresponding data, so it is not included in the table.
4. 4.VOOHU provides REACH and RoHS compliance information and Bourns provides RoHS information on this page. There is no corresponding REACH statement between the two parties, and only RoHS is listed in the table.

#4. Applicable scenarios

1. 1.600 Ω Modem and Telephone Line Interfaces: Verify line impedance, isolation requirements, and surrounding RC/load network match.
2. 2.Low-frequency signal interfaces for communications and instrumentation: focus on the insertion loss, return loss and frequency response on the actual board.
3. 3.Old board replacement or repair: In addition to 6-pin definitions and terminal pitch, review pads, form factors, and height clearance.
4. 4.New board introduction: First check the PCB packaging and voltage withstand requirements, and then do the sample installation and line measurement.

#5. Frequently Asked Questions (FAQ)

Can WHTT6010 directly replace SM-LP-5001?

Don’t just look at the similar values ​​in the table. The electrical indicators on both sides are comparable, but the package size, pins/pads, return loss test circuit, withstand voltage conditions and actual circuits must be confirmed one by one; at least PCB package comparison and sample testing must be completed before making a replacement decision.

What electrical indicators do both parties have that can correspond one to one?

The two sides that can be directly matched are the turns ratio, 115 Ω ±15% DC resistance on both sides, 3.8 H minimum shunt inductance, 7500 Ω minimum shunt resistance, 6 mH typical leakage inductance, 2 kHz insertion loss, return loss, frequency response and insulation resistance. The actual test conditions are subject to the conditions listed in the table.

Why can't we just look at the withstand voltage value to judge the insulation capability?

The withstand voltage test conditions on both sides are different: Bourns is 2000 VRMS, 1 minute; VOOHU is 4600 VAC, 1 mA, 60 seconds between the primary and secondary sides. The voltage form, current limit and test objects are different, and they still need to be confirmed according to the target safety regulations and application test requirements.

What should we focus on checking the package size?

Bourns profile is 12.8 mm × 9.0 mm, 7.5 mm seat height; VOOHU is 13.5 mm max. × 9.5 mm max., 7.8 mm max. Although the terminal pitch is all 2.54 mm, the PCB pads, pin locations, surrounding prohibited areas and overall machine height space still have to be compared.

#WHY CHOOSE VOOHU?

One-stop purchasing:Covering connectors + magnetic components + interface chips, full support from selection to small batches.

Customized on demand:Just provide application requirements and budget, and you can get customized solutions and professional technical support.

Rapid R&D:Direct sales from the original factory, fast FAE response, efficient samples, and shortened product launch cycle.

Core qualifications:ISO9001, ISO14001, RoHS, REACH, two self-owned factories guarantee delivery time and quality.

For more inquiries, please visit VOOHU official website:China www.voohu.cn - Overseas www.voohuele.com - Technical support email: voohu@voohu.cn