IHLP2020BZER4R7M11 - 4.7µH Shielded Power Inductor 3.2A | Vishay
MPN: IHLP2020BZER4R7M11 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.69 | $0.69 |
| 10 | $0.62 | $6.20 |
| 100 | $0.52 | $52.00 |
| 500 | $0.46 | $230.00 |
| 1,000 | $0.41 | $410.00 |
| 3,000 | $0.36 | $1,080.00 |
IHLP2020BZER4R7M11 Overview
A shielded molded inductor (also called a power choke or SMD power inductor) is a passive component that stores energy in a magnetic field and resists changes in current. It is the workhorse of switched-mode power supplies, where it smooths current ripple, filters EMI, and forms the LC tank that sets converter switching frequency. The IHLP family sits in the power-management component hierarchy: power inductor → magnetic component → passive component → electronic component, and is built for high-current, low-profile DC-DC converter applications.
Key features include a low DCR of 81.3 mΩ maximum (for high efficiency and low I²R loss), ±20% inductance tolerance, magnetic shielding that minimizes stray field coupling to nearby noise-sensitive analog/RF circuits, and an operating temperature range suitable for reflow soldering (J-STD-821). The molded construction eliminates audible buzz under high-ripple conditions and provides mechanical robustness in automotive and industrial environments.
The IHLP-2020BZ-11 uses a composite iron-powder core pressed around the windings, which suppresses acoustic noise and gives stable inductance versus DC bias. Vishay rates the 4.7 µH value at 3.2 A saturation current and 81.3 mΩ DCR, meaning a typical 12 V buck converter built around this part can deliver well over 1 A to the load while staying inside the inductor's thermal envelope.
Typical applications include high-current point-of-load (POL) buck regulators, low-voltage distributed power in servers and telecom cards, FPGA and ASIC core voltage rails, Class-D audio output filters, and DC-DC converters in automotive infotainment and ADAS modules where the part's automotive-grade manufacturing discipline and compact 2020 footprint are valuable.
When designing with this inductor, derate saturation current by at least 20% for high-temperature operation and verify DC bias behavior against the manufacturer's L vs I curve. The composite core provides soft saturation, but continuous operation near rated current still raises winding temperature.
This page consolidates distributor pricing, drop-in same-package alternatives, and engineering design guidance that is not found on any single manufacturer or distributor page.
Drop-in alternatives for IHLP2020BZER4R7M11 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IHLP2020BZER4R7M11 (same form factor and footprint) — differing in Construction, Inductance, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IHLP2020BZER4R7M01
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER4R7M1A
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER3R3M11
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER5R6M11
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER4R7M11-01
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER4R7M11 Maximum Ratings & Electrical Characteristics
| Inductance | 4.7 µH |
| Inductance Tolerance | ±20% |
| Test Frequency | 100 kHz |
| Rated DC Current (Idc) | 3.2 A |
| Maximum DC Resistance (DCR) | 81.3 mΩ |
| Shielding | Yes (shielded, molded) |
| Core Material | Powdered iron metal composite |
| Construction | Wire-wound, molded |
| Package / Case Size | IHLP-2020BZ (5.0 mm × 5.0 mm × 3.0 mm) |
| Mounting Type | Surface Mount (SMD) |
| Packaging | Tape & Reel (T/R) |
| Operating Temperature | -55°C to +125°C (typical for IHLP family) |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| Lead-Free Reflow | J-STD-820 compatible |
IHLP2020BZER4R7M11 ihlp-2020bz (5.0 mm × 5.0 mm × 3.0 mm) Pin Configuration Guide
Pin configuration for IHLP2020BZER4R7M11 (ihlp-2020bz (5.0 mm × 5.0 mm × 3.0 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for IHLP2020BZER4R7M11.
Refer to the datasheet for full pin configuration.
Typical Applications
IHLP2020BZER4R7M11 is suitable for 6 applications: Point-of-Load (POL) Buck Converter, FPGA / ASIC Core Voltage Rail, Class-D Audio Output Filter, Automotive Infotainment DC-DC, Server / Telecom Card Distributed Power, Industrial Motor-Drive Auxiliary Supply.
Point-of-Load (POL) Buck Converter
The IHLP2020BZER4R7M11's 4.7 µH inductance, 3.2 A saturation rating, and 81.3 mΩ DCR make it an ideal output inductor for a 12 V-to-1.x V POL buck regulator that delivers 1-2 A to an FPGA or ASIC core rail. Placed between the high-side switch and the output capacitor, it stores energy during the switch on-time and releases it during off-time, smoothing current ripple. The 81.3 mΩ DCR limits I²R loss to ~0.8 W at full 3.2 A load, keeping efficiency above 90%. The molded composite core eliminates audible buzz even at high ripple frequencies, which is critical for telecom and server boards with switching frequencies above 500 kHz.
Recommended
FPGA / ASIC Core Voltage Rail
Modern FPGAs and ASICs require sub-1 V core rails with tight ripple tolerance, often below 20 mV peak-to-peak. The IHLP2020BZER4R7M11 fits as the output inductor of a multi-phase VRM powering a 0.85 V rail at 2 A per phase, where its low DCR preserves efficiency and its composite core keeps inductance stable under DC bias. Compared with ferrite inductors of the same value, the IHLP's powdered-iron core exhibits soft saturation, avoiding abrupt inductor collapse during load transients. This prevents voltage undershoot on the FPGA rail during sudden current steps, improving overall system stability.
Recommended
Class-D Audio Output Filter
In Class-D audio amplifiers the IHLP2020BZER4R7M11 serves as the LC low-pass filter inductor between the switching output stage and the speaker load, where it reconstructs the audio waveform from the PWM carrier. At audio frequencies (20 Hz to 20 kHz) the 4.7 µH inductance presents a high enough impedance (jωL > 0.6 Ω at 20 kHz) to attenuate the 250-500 kHz switching carrier by more than 40 dB. Its molded shielded construction minimizes radiated EMI that could otherwise couple into adjacent analog circuits or speakers, and its low DCR preserves amplifier damping factor for tight bass response.
Recommended
Automotive Infotainment DC-DC
Automotive infotainment systems run from a 12 V battery rail that drops to 8 V during cranking and surges above 16 V on load-dump transients. The IHLP2020BZER4R7M11 is well suited for the front-end buck converter that produces a clean 3.3 V or 5 V rail for infotainment MCUs and displays, owing to its -55°C to +125°C operating range and AEC-Q200-style manufacturing discipline. Its 3.2 A continuous rating supports typical infotainment loads of 1-2 A with margin for inrush. The composite-core construction eliminates the buzz noise that ferrite inductors exhibit under high-ripple conditions, important for noise-sensitive audio subsystems.
Recommended
Server / Telecom Card Distributed Power
In 48 V telecom and server architectures, isolated DC-DC bricks step down to 12 V intermediate bus, then point-of-load converters produce 1-3 V rails. The IHLP2020BZER4R7M11 is an excellent POL output inductor for the second-stage buck, where its 4.7 µH value sets the converter's ripple current to roughly 30% of load at 500 kHz switching - the sweet spot for efficiency. The 81.3 mΩ DCR contributes < 1% efficiency loss even at full 3.2 A load, critical for hot-running server cards. Its shielded construction prevents crosstalk into adjacent signal traces on high-density PCBs.
Recommended
Industrial Motor-Drive Auxiliary Supply
Industrial motor drives require auxiliary 24 V or 12 V rails to power gate drivers, isolated communication, and protection circuits. The IHLP2020BZER4R7M11 is well matched as the energy-storage inductor in an auxiliary buck converter that feeds these subsystems. Its 3.2 A continuous rating and 81.3 mΩ DCR comfortably support 1-2 A continuous loads with low thermal stress. The molded composite construction is more mechanically robust than open-frame ferrite inductors, important in industrial environments with vibration and thermal cycling, and the -55°C to +125°C operating range covers nearly all industrial temperature profiles.
Recommended
Recommended Products Summary
Engineering reference data for IHLP2020BZER4R7M11 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IHLP2020BZER4R7M01 | IHLP2020BZER4R7M1A | IHLP2020BZER3R3M11 | IHLP2020BZER5R6M11 | IHLP2020BZER4R7M11-01 |
|---|---|---|---|---|---|---|
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology |
| Package | IHLP-2020BZ (5.0x5.0 mm) | IHLP-2020BZ (5.0x5.0 mm) - same | IHLP-2020BZ (5.0x5.0 mm) - same | IHLP-2020BZ (5.0x5.0 mm) - same | IHLP-2020BZ (5.0x5.0 mm) - same | IHLP-2020BZ (5.0x5.0 mm) - same |
| Inductance | 4.7 µH ±20% | 4.7 µH ±20% | 4.7 µH ±20% | 3.3 µH ±20% | 5.6 µH ±20% | 4.7 µH ±20% |
| Rated DC Current (Idc) | 3.2 A | ~3.5 A (higher saturation grade) | 3.2 A | 4.7 A | ~2.8 A | 3.2 A |
| Maximum DCR | 81.3 mΩ | ~75 mΩ | 81.3 mΩ | ~50 mΩ | ~95 mΩ | 81.3 mΩ |
| Core Material | Powdered iron composite | Powdered iron composite | Powdered iron composite (antimony-free) | Powdered iron composite | Powdered iron composite | Powdered iron composite (antimony-free) |
| Shielding | Yes (molded) | Yes (molded) | Yes (molded) | Yes (molded) | Yes (molded) | Yes (molded) |
| Automotive Grade | Commercial (AEC-Q200 not qualified) | Commercial | Commercial, antimony-free | Commercial | Commercial | Commercial, antimony-free |
Key Differentiators
- Lowest DCR-per-µH in IHLP 2020 footprint (vs IHLP2020BZER4R7M01)
- Antimony-free core material compliance (vs IHLP2020BZER4R7M11-01)
- Composite-core soft saturation (vs IHLP2020BZER3R3M11)
Design Notes
Estimated: at full 3.2 A continuous current, the IHLP2020BZER4R7M11 dissipates approximately I²R = (3.2)² × 0.0813 = 0.83 W. With a typical IHLP-2020BZ theta_JA of approximately 50 °C/W on a standard 1 oz copper 4-layer PCB, this gives a temperature rise of roughly 42 °C above ambient. Above 2 A continuous load, use a copper pour directly under the inductor's thermal pad to keep junction temperature below 100 °C in 70 °C ambient environments. The molded composite core has better thermal conductivity than open-frame ferrite designs, but heat still conducts primarily through the terminations.
Use the Vishay-recommended land pattern from the datasheet; do NOT use a generic 2020 (5.0 × 5.0 mm) inductor footprint. The IHLP-2020BZ terminations wrap around the package sides to improve solder joint strength and thermal conduction, and the recommended land pattern accounts for the larger terminal geometry. Place input/output capacitors close to the inductor to minimize the AC current loop area, which reduces radiated EMI. A continuous ground plane beneath the inductor also helps thermal dissipation.
Do not assume saturation current equals the DC current rating. The 3.2 A Idc spec on the IHLP2020BZER4R7M11 is the current at which inductance drops by approximately 20-30% (per Vishay's L vs I curves). For a 4.7 µH inductor in a buck converter, peak inductor current is typically 1.3× average load, so derate continuous load to ≤2.3 A to stay below the saturation knee. Also be aware that Vishay issued PCN-DI-00677-2025 converting -11, -1A, -1L IHLP variants to antimony-free core material - this is a drop-in change with no electrical impact, but lot traceability codes may differ.
Although the IHLP2020BZER4R7M11 is shielded, its molded construction only attenuates near-field magnetic coupling. For EMI-sensitive designs, place the inductor over a solid ground plane and route noisy switching traces (high-side FET, low-side FET, bootstrap) on layers away from the inductor's footprint. The composite core's distributed-gap construction produces lower high-frequency harmonic content than ferrite cores, which can simplify EMI filter design at the input of the converter.
Compliance Information
RoHS and REACH compliant per Vishay product page. Not AEC-Q100 qualified (this is an automotive-grade inductor family; AEC-Q100 applies to active ICs). The IHLP-2020BZ family was converted to antimony-free core material per Vishay PCN-DI-00677-2025, making it compliant with Vishay GREEN requirements.
