CL31B155KBHVPNE - 1.5µF 50V X7R 1206 MLCC | Samsung Electro-Mechanics
MPN: CL31B155KBHVPNE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.24 | $24.00 |
| 500 | $0.18 | $90.00 |
| 1,000 | $0.15 | $150.00 |
| 4,000 | $0.12 | $480.00 |
CL31B155KBHVPNE Overview
What is an MLCC? A multilayer ceramic capacitor (MLCC) is the most widely used capacitor technology in modern electronics, consisting of alternating layers of ceramic dielectric and metal electrodes stacked into a compact surface-mount body. Within the capacitor taxonomy (MLCC -> ceramic capacitor -> fixed capacitor -> passive component), X7R is a mid-stability Class II dielectric defined by the EIA RS-198 standard: ±15% capacitance variation over -55 °C to +125 °C and ±15% over the rated voltage range. This places X7R between high-stability C0G/NP0 (near-zero TC) and high-capacitance Y5V/Z5U (poor stability), making it the workhorse choice for decoupling, filtering, and bulk energy storage.
Key features of the CL31B155KBHVPNE include 1.5 µF nominal capacitance, 50 VDC rated voltage, X7R temperature characteristic, ±10% capacitance tolerance, and a 1206 case size (3.2 mm × 1.6 mm). The automotive AEC-Q200 qualification makes it suitable for under-the-hood, body, and chassis electronics. As a Class II MLCC, expect significant capacitance loss with applied DC bias — derate by 30–60% in 50 V designs. The 1206 footprint provides robust mechanical strength and high current handling versus smaller 0402/0603 cases.
Typical applications include automotive ECU decoupling, ADAS sensor filtering, 48 V mild-hybrid DC-Link support, industrial SMPS output filtering, and consumer electronics power rails. For low-impedance bulk decoupling at 50 V rails, X7R 1206 1.5 µF outperforms smaller-case MLCCs by an order of magnitude in voltage coefficient.
When designing with this part, derate capacitance for DC bias (typical 1.5 µF at 0 V becomes ~1.0 µF at 50 V), verify the ripple current against the 1206 thermal limit, and follow X7R derating guidelines above 80% of rated voltage for long-term reliability.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes — including DC bias derating curves and AEC-Q200 application context — that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for CL31B155KBHVPNE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
GRM31MR71H155KA93L
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CGA5L2X7R1H155K
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AS0805KRX7R9BB155
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VJ1206Y155KXJTBC
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UMK316AB7155KL-T
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CL31B155KBHVPNE Maximum Ratings & Electrical Characteristics
| Capacitance | 1.5 µF |
| Capacitance Tolerance | ±10% |
| Rated Voltage (DC) | 50 V |
| Dielectric Characteristic | X7R (EIA RS-198) |
| Operating Temperature Range | -55 °C to +125 °C |
| Package / Case Size | 1206 (3216 Metric) |
| Length | 3.20 mm |
| Width | 1.60 mm |
| Mounting Type | Surface Mount (SMD) |
| Termination Style | Solder Plated (Ni/Sn) |
| AEC-Q200 Qualified | Yes (automotive grade) |
| DC Bias Characteristic | Class II (significant capacitance loss with DC voltage) |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| Packaging | Tape & Reel |
CL31B155KBHVPNE Pin Configuration
| Pin 1 | Terminal A — Solder terminal A (Ni/Sn plated) |
| Pin 2 | Terminal B — Solder terminal B (Ni/Sn plated) |
Typical Applications
CL31B155KBHVPNE is suitable for 6 applications: Automotive ECU Decoupling, 48 V Mild-Hybrid DC-Link Filtering, ADAS Sensor Power Filtering, Industrial SMPS Output Filtering, USB-PD and Battery Charger Bulk Decoupling, Audio Amplifier Power Supply Filtering.
Automotive ECU Decoupling
The CL31B155KBHVPNE is well suited for automotive ECU power-rail decoupling near 12 V and 24 V battery buses. The 1.5 µF bulk capacitance, 50 V headroom, and X7R dielectric maintain stable filtering across the -40 °C to +125 °C under-hood thermal profile. Per Samsung's automotive MLCC datasheet, placing one CL31B155KBHVPNE adjacent to each ECU MCU VCC pin with a 0.1 µF X7R 0402 in parallel suppresses switching noise above 10 MHz and stabilizes the rail during cranking transients.
Recommended
48 V Mild-Hybrid DC-Link Filtering
The CL31B155KBHVPNE provides bulk DC-Link capacitance on the 48 V low-voltage bus of mild-hybrid electric vehicles. Its 50 VDC rating gives a 4% margin above the 48 V nominal rail and headroom for load-dump transients to 52 V. The 1206 case dissipates ripple current from the DC-DC converter stage more efficiently than smaller 0805 MLCCs, lowering PCB temperature rise by an estimated 8–12 °C at 1 A RMS ripple. AEC-Q200 qualification ensures the part survives the 125 °C engine-bay thermal envelope.
Recommended
ADAS Sensor Power Filtering
For ADAS camera, radar, and LiDAR modules, the CL31B155KBHVPNE filters the 12 V–24 V sensor supply rail where image-sensor analog front ends demand low-noise, stable power. The X7R dielectric maintains ±15% capacitance over the -55 °C to +125 °C automotive range, while the 1206 footprint provides mechanical robustness for vibration-prone mounting locations such as front bumper camera housings. AEC-Q200 qualification is mandatory for these safety-critical sensor modules.
Recommended
Industrial SMPS Output Filtering
The CL31B155KBHVPNE is used as an output filter capacitor on industrial switch-mode power supplies operating from 24 V or 48 V rails. Its 1.5 µF bulk capacitance reduces output ripple voltage below 50 mVpp when combined with the SMPS inductor, and the X7R dielectric handles the high dV/dt transitions without audible piezo effects. The 1206 case provides sufficient thermal mass for continuous 500 mA ripple at 100 kHz typical SMPS switching frequency.
Recommended
USB-PD and Battery Charger Bulk Decoupling
The CL31B155KBHVPNE is a strong fit for USB-PD 20 V input rails and 1S–2S lithium battery charger input filtering. The 50 V rating exceeds the USB-PD 20 V nominal by 150%, eliminating the need for a separate higher-voltage capacitor, while the 1.5 µF bulk capacitance handles the 100 W PD load steps within 100 µs. AEC-Q200 is overkill here but the part's reliability pedigree is welcome for premium consumer power banks.
Recommended
Audio Amplifier Power Supply Filtering
The CL31B155KBHVPNE provides local bulk decoupling on Class-D audio amplifier power rails up to 50 V, suppressing switching ripple that would otherwise couple into the audio output. The 1206 case and 1.5 µF capacitance deliver roughly 60% lower ESR at 100 kHz than 0805 equivalents, reducing high-frequency noise above 1 MHz that Class-D amplifiers can re-radiate into the audio band. X7R's Class II dielectric is acceptable here because audio frequencies do not probe DC bias variations.
Recommended
Recommended Products Summary
Engineering reference data for CL31B155KBHVPNE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | GRM31MR71H155KA93L | CGA5L2X7R1H155K | AS0805KRX7R9BB155 | VJ1206Y155KXJTBC | UMK316AB7155KL-T |
|---|---|---|---|---|---|---|
| Package | 1206 (3216 Metric) | 1206 (3216 Metric) - same | 1206 (3216 Metric) - same | 1206 (3216 Metric) - same | 1206 (3216 Metric) - same | 1206 (3216 Metric) - same |
| Brand | Samsung Electro-Mechanics | Murata | TDK | YAGEO | Vishay | Taiyo Yuden |
| Capacitance | 1.5 µF | 1.5 µF | 1.5 µF | 1.5 µF | 1.5 µF | 1.5 µF |
| Rated Voltage | 50 V | 50 V | 50 V | 50 V | 50 V | 50 V |
| Dielectric | X7R | X7R | X7R | X7R | X7R | X7R |
| AEC-Q200 Qualified | Yes | Yes | Yes | Yes | Yes | No (commercial) |
| Operating Temperature | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +85 °C |
| Tolerance | ±10% (K) | ±10% (K) | ±10% (K) | ±10% (K) | ±10% (K) | ±10% (K) |
Key Differentiators
- AEC-Q200 automotive qualification with broad second-source ecosystem (vs GRM31MR71H155KA93L)
- 1206 case delivers lowest ESR among 1.5 µF 50 V X7R AEC-Q200 parts (vs UMK316AB7155KL-T)
- Samsung factory allocation with active automotive MLCC production (vs VJ1206Y155KXJTBC)
Design Notes
The CL31B155KBHVPNE is a Class II X7R MLCC that loses 30–60% of its nominal 1.5 µF capacitance under the 50 VDC rated bias voltage. Estimated: at 50 VDC the effective capacitance is ~0.9–1.1 µF per typical Samsung X7R DC bias curves. For bulk-decoupling designs where full 1.5 µF is required, either derate to a lower-voltage 25 V or 35 V X7R part, or parallel two CL31B155KBHVPNE devices. Always reference the manufacturer's DC bias curve rather than relying on the nominal capacitance.
Estimated: at 1 A RMS ripple current at 100 kHz with the 1206 case dissipating ~0.2 W, the CL31B155KBHVPNE self-heats by approximately 10–15 °C above ambient based on Samsung's thermal-resistance figures. For continuous SMPS output filtering at >500 mA ripple, mount the part over a continuous ground-pour copper pad on at least 1 oz copper to keep the junction below 125 °C. The 1206 footprint provides significantly better thermal performance than 0805 or 0603 equivalents at the same ripple current.
Use the IPC-7351 nominal 1206 land pattern: two 1.10 mm × 1.40 mm pads with a 1.80 mm gap. Avoid placing the part near board edges where thermal stress concentrates during reflow, and avoid placing it directly under flex regions to prevent cracking from vibration. Per Samsung's automotive MLCC application notes, do not route high-current traces through the capacitor pads; use a separate via array to the inner power plane to keep mechanical stress off the ceramic body.
Do not use the CL31B155KBHVPNE above 50 VDC — Class II X7R dielectric breakdown begins at ~1.5× rated voltage, and automotive load-dump transients on a 24 V bus can spike to 36 V while a 48 V mild-hybrid bus can spike to 52 V, leaving only a 4% margin on this 50 V part. For 48 V DC-Link applications, prefer a 100 V X7R part for adequate margin. Also avoid using X7R in timing-critical analog circuits where the ±15% TC variation would shift RC time constants; C0G/NP0 is the correct choice there.
Compliance Information
AEC-Q200 qualified (passive component automotive standard, distinct from AEC-Q100 which applies to active ICs). RoHS compliant per Samsung product page. Lead-free Ni/Sn terminations.