IRLZ34NPBF - 55V 30A N-Channel HEXFET MOSFET | Infineon
MPN: IRLZ34NPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.35 | $13.50 |
| 100 | $0.98 | $98.00 |
| 500 | $0.79 | $395.00 |
| 1,000 | $0.65 | $650.00 |
Drop-in alternatives for IRLZ34NPBF — 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:
IRLZ44NPBF
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IRF3205
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IRFZ44NSTRLPBF
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View Datasheet →IRLZ34NPBF Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon (formerly International Rectifier) |
| Part Number Suffix | PBF = Lead-free (Pb-free), Tube packaging |
| Transistor Type | N-Channel HEXFET Power MOSFET |
| Drain-to-Source Voltage (VDS) | 55 V |
| Continuous Drain Current (ID) at Tc=25 C | 30 A |
| On-Resistance Rds(on) max @ VGS=10 V | 35 mOhm |
| Gate Threshold Voltage VGS(th) | 1.0 V to 2.0 V (logic-level) |
| Total Gate Charge (Qg) | 16.7 nC (typical) |
| Power Dissipation (PD) at Tc=25 C | 68 W |
| Operating Junction Temperature | -55 C to +175 C |
| Package | TO-220AB (through-hole, 3 leads + tab) |
| Mounting Type | Through Hole |
| RoHS Status | Compliant (Pb-free PBF suffix) |
| MSL Level | Not applicable (through-hole) |
IRLZ34NPBF Pin Configuration
| Pin 1 | Gate — MOSFET gate input (logic-level, drive with 4-5 V or higher) |
| Pin 2 | Drain — MOSFET drain (also connected to metal tab) |
| Pin 3 | Source — MOSFET source (ground reference in low-side applications) |
| Pin TAB | Drain — Metal tab - electrically tied to Drain (pin 2); mount to heatsink |
Safe Operating Area (DC, Tc=25 C)
Typical Applications
IRLZ34NPBF is suitable for 6 applications: Brushed DC Motor Speed Control (PWM), Solenoid and Relay Driver, Battery Protection and Load Switch (12-24 V Packs), Synchronous Rectifier Secondary Side (Low Voltage SMPS), LED Driver and High-Current Lighting Switch, Industrial Automation Load Switch.
Brushed DC Motor Speed Control (PWM)
The IRLZ34NPBF is well-suited to brushed DC motor speed control via PWM at 1-50 kHz because of its 16.7 nC total gate charge, which lets a 5 V MCU GPIO toggle the gate directly without a dedicated gate-driver IC. The 35 mOhm Rds(on) at 10 V VGS keeps conduction loss manageable at 5-10 A continuous motor current, while the logic-level threshold ensures the MCU can fully enhance the channel. In a typical low-side PWM circuit the IRLZ34NPBF sits between the motor and ground; its TO-220AB tab is screwed to a small heatsink that handles up to 68 W at Tc=25 C. Designers should add a 10 kOhm gate-to-source pulldown resistor to keep the MOSFET off during MCU reset, preventing inrush currents through partially-strobed gates.
Recommended
Solenoid and Relay Driver
Driving 12 V or 24 V solenoids from a microcontroller is a classic IRLZ34NPBF use case. The logic-level gate accepts a 3.3 V or 5 V GPIO directly, while the 30 A continuous current rating easily handles the inrush of a solenoid coil (typically 1-3 A steady, 5-10 A inrush). The 55 V VDS provides ample headroom for the flyback voltage when the coil is de-energized - pair the IRLZ34NPBF with a 30 V TVS or schottky diode across the coil for additional protection. The TO-220AB through-hole package mounts easily on a PCB with a hand-soldered tab to a copper pour for thermal relief during repetitive switching.
Recommended
Battery Protection and Load Switch (12-24 V Packs)
In e-bike, power-tool, and 24 V industrial battery packs, the IRLZ34NPBF serves as a low-side load-switch disconnect. Its 30 A continuous rating covers the typical 10-15 A peak draw of mid-power tools, while the logic-level gate allows direct control from a battery-management MCU. The 55 V VDS protects against 24 V pack transients during regenerative braking or inductive kickback. A 100 kOhm gate-source resistor prevents unintended turn-on from leakage paths, and the TO-220AB tab provides a rugged mechanical mount that survives vibration in power-tool housings. For packs above 24 V nominal, the 60 V IRLZ44N variant offers additional VDS headroom.
Recommended
Synchronous Rectifier Secondary Side (Low Voltage SMPS)
On the secondary side of a 12 V or 5 V SMPS, the IRLZ34NPBF can replace a Schottky diode as a synchronous rectifier. Its 35 mOhm Rds(on) is lower than the forward voltage drop of a 30 A Schottky (typically 0.4-0.5 V at full load), reducing conduction loss by 80% or more. The logic-level gate is compatible with most synchronous-rectifier controller ICs that output 5 V. The 55 V VDS provides more than enough headroom for 12 V or 24 V secondaries. Designers should add dead-time control in the controller to prevent shoot-through when the high-side switch turns on, and use a small Schottky anti-parallel to handle the brief dead-time interval.
Recommended
LED Driver and High-Current Lighting Switch
For 12 V or 24 V LED strips and high-brightness automotive lighting, the IRLZ34NPBF acts as a low-side PWM dimmer. Its logic-level gate accepts a 5 V PWM signal from an MCU at 200 Hz to 2 kHz, while the 30 A continuous current covers multi-meter LED strip installations up to 360 W at 12 V. The 55 V VDS is sufficient for 24 V LED buses and withstands automotive load-dump transients when paired with a TVS. The TO-220AB package dissipates up to 68 W with adequate heatsinking, well beyond what is needed for typical 5-10 A LED loads. A gate-source pulldown resistor prevents flicker during MCU boot-up.
Recommended
Industrial Automation Load Switch
In 24 V industrial PLC output modules, the IRLZ34NPBF serves as a low-side load switch for solenoid valves, indicator lamps, and small DC loads. The 55 V VDS handles 24 V bus transients up to the IEC 61131-2 surge profile, and the 30 A current rating exceeds the typical 0.5-2 A per-channel load. The logic-level gate allows direct drive from a 5 V PLC logic IC without optocoupler + gate-driver complexity. The TO-220AB through-hole construction withstands industrial vibration and offers a long-term solder-joint reliability advantage over surface-mount alternatives. Designers should add a 10 kOhm gate pulldown and a TVS clamp across inductive loads.
Recommended
Recommended Products Summary
Engineering reference data for IRLZ34NPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRLZ44N | IRLZ34N | NTP30N06 | IRF3205 | IRFZ44N |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | onsemi | Infineon | Infineon |
| Package | TO-220AB (through-hole) | TO-220AB (through-hole) - same | TO-220AB (through-hole) - same | TO-220AB (through-hole) - same | TO-220AB (through-hole) - same | TO-220AB (through-hole) - same |
| VDS (Drain-to-Source Voltage) | 55 V | 55 V | 55 V | 60 V (+9%) | 55 V | 55 V |
| Continuous Drain Current (ID @ Tc=25 C) | 30 A | 47 A (+57%) | 30 A (same) | 30 A (same) | 110 A (+267%) | 49 A (+63%) |
| Rds(on) max @ VGS=10 V | 35 mOhm | 22 mOhm (-37%) | 35 mOhm (same) | 40 mOhm (+14%) | 8.0 mOhm (-77%) | 17.5 mOhm (-50%) |
| Gate Threshold VGS(th) | 1.0 - 2.0 V (logic-level) | 1.0 - 2.0 V (logic-level) | 1.0 - 2.0 V (logic-level) | 2.0 - 4.0 V (logic-level) | 2.0 - 4.0 V (standard, NOT logic-level) | 2.0 - 4.0 V (standard, NOT logic-level) |
| Logic-Level Gate (5 V Direct Drive) | Yes | Yes | Yes | Yes | No (needs 10 V gate) | No (needs 10 V gate) |
| Power Dissipation (Tc=25 C) | 68 W | 94 W (+38%) | 68 W (same) | [DATA_NEEDED] | 200 W (+194%) | 94 W (+38%) |
| RoHS Compliant | Yes (PBF suffix) | Yes | No (legacy lead-containing) | Yes | Yes | Yes |
Key Differentiators
- Higher current and lower Rds(on) in the same package (vs IRLZ44N)
- RoHS-compliant Pb-free terminals (vs IRLZ34N (non-PBF))
- 5 V logic-level direct drive without gate-driver IC (vs IRF3205 / IRFZ44N)
Design Notes
Estimated: at ID=10 A continuous and Rds(on)=35 mOhm, conduction loss is approximately 3.5 W. With TO-220AB RthJA=62 C/W (no heatsink, free air), the junction temperature would rise roughly 217 C above 25 C ambient - far above the 175 C limit. Add a heatsink with RthSA under 30 C/W (a 5 C/W clip-on heatsink suffices) to keep Tj under 130 C at 10 A. At ID=20 A, conduction loss rises to 14 W, demanding either a substantially larger heatsink or active airflow. Always compute Tj = Pd x RthJA + Tambient and stay under 125 C for long-term reliability margin.
The TO-220AB tab is internally connected to the Drain, so for low-side switching the tab is at ground potential when the MOSFET is OFF and at supply voltage when ON. For isolated mounting, use a mica or silicone insulator pad between the tab and the heatsink, plus a nylon shoulder washer on the mounting screw to prevent the screw from shorting to the tab. Without an insulator, the heatsink becomes a live heatsink at Vsupply potential - a safety hazard in 24 V and 48 V systems. Apply thermal compound between the tab and the insulator and between the insulator and the heatsink.
Always include a 10 kOhm gate-to-source pulldown resistor (Rgs) directly across the gate and source pins, physically close to the device. Without Rgs, the gate can float to VGS(th) due to Miller charge injection during high dV/dt switching events, causing partial turn-on, shoot-through, or sustained oscillation. Also, do not assume 'logic-level' MOSFETs are fully enhanced at 3.3 V; the IRLZ34NPBF VGS(th) max is 2.0 V but full Rds(on) requires 5 V or higher. Use 5 V or 10 V gate drive for lowest conduction loss. For switching applications above 50 kHz, a dedicated gate-driver (TC4420, UCC27517) reduces switching loss by 50%.
Minimize the gate-drive loop area by placing the gate resistor and pulldown resistor within 10 mm of the gate pin. Keep the high-current drain-source loop compact and use a ground plane on the source side to reduce parasitic inductance. For switching frequencies above 100 kHz, add a small RC snubber (10 Ohm + 1 nF) across drain-source to limit ringing. When using the TO-220AB in a high-side position, ensure sufficient copper area (at least 50 mm2) on the source side for thermal dissipation through the PCB, and route the gate return trace directly back to the driver IC rather than through a noisy ground plane.
Compliance Information
PBF suffix confirms lead-free terminal finish per Infineon part numbering. Through-hole TO-220AB package, not AEC-Q100 qualified - automotive designs should consider the IRF7507TRPBF or AEC-Q100-screened variants. REACH SVHC compliant to the 0.1% w/w threshold per Infineon product declarations.
