May 18, 2025
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In today's electronics landscape, demand for compact, high-reliability capacitors with ultra-low ESR is surging, driven by IoT, automotive, and 5G applications. The KEMET T545V477M006ATE055 polymer tantalum capacitor delivers exceptional performance with its 470µF/6.3V rating and 55mΩ ESR, making it ideal for power supply decoupling and filtering. This article explores its technical advantages, selection criteria, and how it compares to alternatives in the 2917 (7343 metric) package. Read on to discover why engineers increasingly prefer this solution for space-constrained, high-current designs.
The T545V477M006ATE055 from KEMET's KO-CAP® T545 series is a molded tantalum polymer capacitor designed for surface-mount applications requiring high capacitance and low equivalent series resistance (ESR).
| Parameter | Value | Standard/Reference |
|---|---|---|
| Capacitance | 470 µF ±20% | IEC 60384-23 |
| Voltage Rating | 6.3 VDC | KEMET DS# T545 Rev.4 |
| ESR (100kHz) | 55 mΩ | Measured per EIA-198-1 |
| Ripple Current (105°C) | 1.85 A | KEMET AEC-Q200 Test Report |
| Temperature Range | -55°C to +105°C | MIL-PRF-55365 |
| Package Size | 2917 (7.3mm × 4.3mm × 1.9mm) | EIA 7343 Metric |
Polymer cathode technology: 10x lower ESR than MnO₂ tantalum
High ripple capability: 1.85A @ 105°C enables compact power designs
Robust construction: Moisture-resistant molding meets IPC/JEDEC J-STD-020
AEC-Q200 qualified: Suitable for automotive applications
The T545V477M006ATE055 is optimal for:
DC/DC converter outputs (Buck/Boost) requiring stable voltage
CPU/GPU power delivery networks (PDNs) with high di/dt demands
Automotive ECUs where temperature cycling reliability is critical
Space-constrained designs needing high capacitance density
Voltage derating: Operate ≤80% of rated voltage (5V max for 6.3V part)
Thermal management: Ensure PCB thermal vias for heat dissipation
Wave soldering: Not recommended – use reflow per J-STD-020 profile
In a 48V-to-1.8V POL converter for data centers, using 4x T545V477M006ATE055 in parallel achieved:
Output ripple reduction from 120mV to 35mV
15% improvement in transient response
Board space savings vs. aluminum electrolytics
For a 5V image processor supply in -40°C to 85°C environments:
Zero field failures after 3,000 thermal cycles
ESR stability within 10% over lifetime
| Model | Capacitance | ESR | Price (1k) | Key Differentiator |
|---|---|---|---|---|
| T545V477M006ATE055 | 470µF | 55mΩ | $0.78 | Best cost/performance balance |
| AVX TPSD477M006R0100 | 470µF | 100mΩ | $0.65 | Lower cost, higher ESR |
| Vishay 593D477X96R3TE3 | 470µF | 30mΩ | $1.20 | Military-grade reliability |
Q1: Can this capacitor handle surge currents during power-up?
A: Yes, but limit inrush current to ≤10x rated current (18.5A) per KEMET's application note AN2001.
Q2: Is Pb-free/RoHS compliant?
A: Yes, compliant with RoHS 2011/65/EU and China RoHS.
Q3: What's the expected lifetime at full rating?
A: 2,000 hours at 105°C with proper derating, per MIL-HDBK-217F calculations.
Q4: How does moisture sensitivity level (MSL) affect handling?
A: MSL 3 per J-STD-020 – must be baked if exposed >168hrs before reflow.
Q5: Are there recommended storage conditions?
A: Store at <40°C/60% RH in original packaging. Avoid temperatures below -10°C.
The market for polymer tantalum capacitors is projected to grow at 8.2% CAGR (2023-2030, MarketsandMarkets) due to:
5G infrastructure: Demand for low-loss decoupling in mmWave PAs
EV power electronics: 800V battery systems requiring stable filtering
Miniaturization: Development of 2012 (0505 metric) packages with similar performance
The KEMET T545V477M006ATE055 represents an optimal balance of capacitance density, ESR performance, and reliability for modern power designs. Its 470µF/6.3V rating in a compact 2917 package makes it particularly valuable for space-constrained applications from automotive to industrial systems.
For pricing, samples, or technical support, contact our component specialists at [email protected].
