Audio Transformer: VOOHU WHTT6010 Replacement for Tamura TTC-5023 Comparison Report
Audio Transformer: VOOHU WHTT6010 Replacement for Tamura TTC-5023 Comparison Report
1. Competitor Product Overview (Tamura Corporation)
On a 600-ohm voice or data-modem interface, Tamura TTC-5023 is a 6-pin surface-mount encapsulated transformer used for line-side coupling and isolation. Its 600 Ω:600 Ω specification, 3.8 H minimum primary inductance, and response and return-loss values across 200 Hz–4 kHz make it a starting point for V.32-class modem and voice-interface designs. The line termination, external network, and insulation target still need board-level review together.
2. VOOHU Replacement Overview (Suzhou VOOHU Electronic Technology Co., Ltd.)
VOOHU WHTT6010 is a 6-pin SMD audio transformer with 1-3 / 6-4 winding connections, and it can be considered in the same selection round for a 600-ohm line coupling and isolation design. A 1:1 turns ratio, 3.8 H minimum primary parallel inductance, 115 Ω ±15% DCR on both sides, and 2 dB maximum insertion loss at 2 kHz make it useful for preliminary screening. The actual source impedance, load, external RC network, and PCB footprint still require review before sampling.
3. Key Parameter Comparison
The electrical items that can be matched one-to-one are placed together below. Test conditions for insertion loss, leakage inductance, return loss, and dielectric strength are not identical, so the values support screening but do not establish replacement compatibility by themselves.
| Parameter | Tamura TTC-5023 | VOOHU WHTT6010 |
|---|---|---|
| Mounting / winding connection | 6-pin surface mount; 1-3 (primary), 6-4 (secondary) | 6-pin SMD; 1-3 (primary), 6-4 (secondary) |
| Primary D.C. resistance (PIN1-3) | 115 Ω ±15% | 115 Ω ±15% |
| Secondary D.C. resistance (PIN4-6) | 115 Ω ±15% | 115 Ω ±15% |
| Primary parallel inductance (PIN1-3) | 3.8 H min. (200 Hz, 0.78 Vrms) | 3.8 H min. (200 Hz, 0.78 V; parallel resistance 7500 Ω min.) |
| Leakage inductance (PIN1-3; PIN4-6 shorted) | 7 mH max. (1 kHz, 0.78 Vrms) | 6 mH typ. (1 kHz, 0.1 V) |
| Insertion loss | 2.0 dB max. (2 kHz, 0 dBm) | 2 dB max. (2 kHz, 0 dB; PIN1-3, PIN4-6 with 412 Ω) |
| Frequency response | ±0.25 dB (200 Hz–4 kHz, 0 dBm) | ±0.25 dB (200 Hz–4 kHz, ref. 2 kHz) |
| Return loss | 14 dB min. (200 Hz–4 kHz, 0 dBm) | 24 dB min. (200 Hz–4 kHz, ref. 600 Ω) |
| Turns ratio (PIN1-3:PIN6-4) | 1:1.00 ±2% | 1 ±1% (15 kHz, 1 V) |
| Dielectric strength (P-S) | 3000 Vrms, 1 min | 4600 VAC, 1 mA, 60 sec |
| RoHS | RoHS Compliant | REACH & RoHS Compliant |
Notes:
- TTC-5023 insertion loss is specified at 2 kHz and 0 dBm. WHTT6010 is measured at 2 kHz and 0 dB, with 412 Ω on the 4-6 side. Align source impedance, load impedance, drive level, and the external network before comparing the two on the bench.
- Both leakage-inductance measurements short the other winding, but the excitation differs: 0.78 Vrms for TTC-5023 and 0.1 V for WHTT6010. Do not judge leakage inductance from the two values alone without the test level.
- Return-loss reference conditions differ: TTC-5023 lists 200 Hz–4 kHz at 0 dBm, while WHTT6010 uses a 600 Ω reference. The actual line termination and external RC network directly affect the result.
- The dielectric tests use different voltage forms, current limits, and durations. For equipment that must cover -20°C to +85°C or be assessed to UL60950 / EN60950 boundaries, confirm the temperature grade and certification applicability of the relevant WHTT6010 version with VOOHU engineering.
- A common 6-pin SMD form does not mean the footprints are interchangeable. Overlay the pin numbers and locations, land pattern, height, keep-out, and reflow assembly requirements, then validate on production-representative samples.
4. Applications
- 600-ohm line interfaces in V.32, V.34, V.90, and V.92 data modems: build the evaluation circuit around the termination and drive level used by the target protocol.
- Analog voice isolation and coupling stages in voice gateways, PBX equipment, and telephone access equipment: focus on low-end insertion loss, response, and return loss.
- Line interfaces in industrial intercoms, building-access systems, and remote voice terminals: evaluate system grounding, dielectric strength, and actual noise performance as a set rather than turns ratio alone.
- Legacy communication-board redesigns or localization programs: verify pins, lands, and height clearance first, then validate assembly, dielectric performance, and in-circuit line behavior on samples.
5. FAQ
Can WHTT6010 directly replace TTC-5023?
Do not decide from the close values in the table alone. Winding connections, primary inductance, and D.C. resistance are comparable, but return loss, leakage inductance, dielectric testing, and termination conditions differ. Verify pins, PCB lands, the 600-ohm line, external network, and sample-on-board performance item by item.
Why check the termination network when both parts have a 1:1 turns ratio?
A 1:1 ratio describes voltage ratio only; it does not establish the line impedance. Source impedance, load, termination resistance, and the RC network affect insertion loss, return loss, and low-frequency response, so the target circuit should be used for evaluation.
Does 24 dB minimum return loss necessarily outperform 14 dB minimum?
No. The listed reference conditions differ. The two values become comparable only when frequency range, source impedance, termination impedance, drive level, and external network are held the same.
How should the dielectric-strength requirement be judged?
Judge it against the isolation target of the finished equipment. 3000 Vrms for one minute and 4600 VAC at 1 mA for 60 seconds are different test methods; review voltage form, current limit, duration, creepage distance, and the system safety target together.
What should be checked first during sample validation?
Confirm pin locations and the PCB footprint first. Then use the target line impedance to test insertion loss, response, and return loss from 200 Hz to 4 kHz, followed by dielectric, reflow-assembly, and system-noise checks.
Why VOOHU?
One-stop sourcing: connectors + magnetics + interface chips, full support from selection to small-batch production.
Custom solutions: just share your application requirements and budget to get a tailored solution with professional technical support.
Fast development: direct from the manufacturer, rapid FAE response, efficient sampling, shorter time-to-market.
Core qualifications: ISO9001, ISO14001, RoHS, REACH; two in-house factories ensure delivery and quality.
For more information, visit VOOHU: China www.voohu.cn | Overseas www.voohuele.com | Technical support: song.lei@voohu.cn
Replacement Cross-Reference
Tamura TTC-5023 is a 6-pin surface-mount modem transformer with a 1:1 turns ratio, 3.8 H minimum primary inductance, and 2.0 dB maximum insertion loss at 2 kHz. VOOHU WHTT6010 is a 6-pin SMD audio transformer with a 1±1% turns ratio, 3.8 H minimum primary inductance, and 2 dB maximum insertion loss at 2 kHz. Compatibility still requires pin mapping, PCB-footprint, termination-network, dielectric-requirement, and sample-on-board verification. Compatible VOOHU WHTT6010, replacement, visit for more information:
