My Inquiry
My Account
Nexperia USA Inc. PSMNR55-40SSHJ
- Part No.:
- PSMNR55-40SSHJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1235
- Datasheet:
-
PSMNR55-40SSHJ.pdf
- Description:
- PSMNR55-40SSH/SOT1235/LFPAK88
- Quantity:
- Payment:
- Shipping:
Inventory:5,446
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PSMNR55-40SSH from Nexperia is an N-channel standard-level MOSFET in LFPAK88 (SOT1235) package, rated for 40 V VDS, 0.55 mΩ RDS(on) at 10 V VGS, and 500 A continuous drain current at Tmb = 25 °C. It employs NextPowerS3 SchottkyPlus technology for low spiking, soft body-diode recovery, and avalanche ruggedness (1375 mJ), targeting high-efficiency, high-frequency switching in power stages.
For engineers reviewing the PSMNR55-40SSH datasheet, PSMNR55-40SSH pinout, PSMNR55-40SSH application, or PSMNR55-40SSH equivalent, key selection criteria include its 0.35 K/W junction-to-mounting-base thermal resistance, 190–267 nC total gate charge, 32–65 nC gate-drain charge, and LFPAK88 footprint compatibility with D2PAK-replacement layouts in high-current BMS and eFuse designs.
Technical Context
This MOSFET uses copper-clip die attach and exposed mounting base (drain-connected) to minimize package inductance and thermal resistance. Its SchottkyPlus body diode delivers soft reverse recovery (trr = 62 ns, Qr = 93 nC) without elevated IDSS leakage-enabling low-EMI synchronous rectification and hot-swap control.
The device features narrow VGS(th) (2.4–3.6 V at 25 °C) and strong linear-mode SOA, supporting parallel operation and safe high-current switching up to 175 °C junction temperature. Gate drive is compatible with standard 10 V logic, with low QG/QGD optimized for >100 kHz PWM operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V maximum drain-source voltage - defines safe blocking capability in 36 V nominal systems like server PSUs and 48 V battery architectures. |
| RDS(on) | 0.55 mΩ max at VGS = 10 V, Tj = 25 °C - enables <1.4 W conduction loss at 500 A, critical for minimizing thermal stress in high-current paths. |
| ID (cont) | 500 A continuous at Tmb = 25 °C - validated under application conditions; actual current limited by PCB copper area and heatsinking design. |
| QG(tot) | 190–267 nC - low total gate charge reduces driver power and switching losses, especially beneficial above 200 kHz switching frequencies. |
| Rth(j-mb) | 0.35 K/W typical - enables efficient heat transfer to external heatsink or copper plane, supporting high-power density layout in compact modules. |
| EAS | 1375 mJ non-repetitive avalanche energy - provides robustness against inductive load transients in motor control and hot-swap applications. |
| trr | 62 ns reverse recovery time - ensures minimal voltage overshoot and ringing during commutation, reducing EMI filter burden. |
Pinout & Package
LFPAK88 (SOT1235) is a 4-lead, 8 mm × 8 mm × 1.6 mm surface-mount package with exposed copper mounting base (drain-connected) for low-inductance, high-current routing and enhanced thermal performance. The lead-frame design supports automated optical solder-joint inspection and withstands mechanical stress better than D2PAK.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | G (Gate) | Control terminal for MOSFET turn-on/turn-off; requires ≤20 V DC rating and low-impedance drive due to 190–267 nC QG. |
| 2, 3, 4 | S (Source) | Three parallel source terminals reduce bond-wire inductance and improve current sharing; connected internally to source metallization. |
| mb | D (Drain / Mounting Base) | Exposed copper base electrically connected to drain; serves as primary thermal path and high-current return node-must be soldered to large copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| SchottkyPlus body diode | Soft reverse recovery (ta = 29 ns, tb = 24 ns) with Qr = 93 nC and VSD = 0.79 V - eliminates need for external Schottky in synchronous rectifiers while avoiding high leakage. |
| LFPAK88 package | 8 × 8 mm footprint with copper-clip die attach - achieves 0.35 K/W Rth(j-mb) and supports 500 A continuous current without wire bonds, improving reliability over D2PAK. |
| Narrow VGS(th) | 2.4–3.6 V at 25 °C - enables consistent turn-on across units and stable current sharing in paralleled configurations for scalable power designs. |
| Avalanche rating | 100% tested to 1375 mJ EAS - guarantees ruggedness against unclamped inductive switching events in motor drives and eFuse circuits. |
| High-temperature qualification | Rated to 175 °C junction temperature and UL2595 compliant - suitable for sealed, high-ambient environments such as industrial BMS enclosures and telecom power shelves. |
Applications
| Brushless DC Motor Control | Synchronous Rectification |
|---|---|
|
Use Scenario: High-power BLDC inverters for industrial pumps and EV auxiliary drives operating at 20–100 kHz PWM frequency. IC Role / Device Role / Timing Role: Low-side switching element in three-phase bridge, handling peak currents >1 kA with minimal conduction and switching loss. Use Value: 0.55 mΩ RDS(on) and 62 ns trr reduce system losses by ≥8% vs. comparable D2PAK MOSFETs, enabling smaller heatsinks and higher power density. |
Use Scenario: Secondary-side synchronous rectification in 3 kW server AC-DC power supplies with LLC resonant topology. IC Role / Device Role / Timing Role: Fast-turning, low-VF replacement for Schottky diodes in 12 V and 48 V output rails. Use Value: SchottkyPlus diode behavior (VSD = 0.79 V) cuts forward conduction loss by 30% versus discrete Schottky, while eliminating reverse recovery spikes that degrade EMI compliance. |
| Battery Protection (BMS) | eFuse & Load Switch |
|
Use Scenario: Main disconnect switch in 48 V lithium-ion battery packs for datacenter UPS and energy storage systems. IC Role / Device Role / Timing Role: Bidirectional current-handling MOSFET used in back-to-back configuration for overcurrent and short-circuit protection. Use Value: Strong linear-mode SOA and 175 °C Tj rating allow sustained fault-current interruption without thermal runaway, meeting IEC 62368-1 safety requirements. |
Use Scenario: Hot-swap controller output stage in modular server power distribution units managing inrush and steady-state loads up to 400 A. IC Role / Device Role / Timing Role: High-current load switch with fast turn-off (<200 ns effective) to limit fault energy during short-circuit events. Use Value: 2237 A pulsed IDM and 1375 mJ EAS enable controlled current limiting and safe shutdown without catastrophic failure under 10 ms faults. |
Availability
PSMNR55-40SSH is available at Aetrix Electronics and suitable for brushless DC motor control, synchronous rectification in server power supplies, battery management systems, and eFuse/load-switch applications requiring stable component supply and long-term industrial availability.
Supply support for PSMNR55-40SSH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade power MOSFETs.
PSMNR55-40SSH belongs to the NextPowerS3 family, engineered specifically for high-efficiency, high-current switching in server, industrial, and battery-powered systems where low RDS(on), soft diode recovery, and thermal robustness are critical.
FAQ
What is the recommended gate resistor value for PSMNR55-40SSH in a 100 kHz synchronous buck converter?
A 2.2 Ω to 5.6 Ω gate resistor is recommended to balance switching speed and gate-drive stability. With QG = 190–267 nC and typical driver output impedance, this range limits dV/dt to ~10 V/ns and suppresses oscillation during turn-on/turn-off, especially when driving into the 15 pF Crss capacitance.
Can PSMNR55-40SSH be paralleled with identical units without external current-sharing resistors?
Yes-its narrow VGS(th) tolerance (2.4–3.6 V at 25 °C) and positive RDS(on) temperature coefficient ensure inherent current balancing. At 105 °C junction temperature, RDS(on) rises to 0.68 mΩ (typ), promoting thermal self-balancing across paralleled devices without added loss or board space.
Is the mounting base (mb) electrically isolated from the PCB copper pour?
No-the mounting base is internally connected to the drain and must be soldered directly to a dedicated drain-copper pour. Electrical isolation is not supported; creepage and clearance comply with UL2595 only when mounted per Nexperia's SOT1235 footprint guidelines with minimum 1.25 mm solder mask dams and 0.7 mm land extensions.
Does PSMNR55-40SSH require a negative gate turn-off voltage to ensure reliable blocking?
No-its VGS rating of ±20 V allows robust 0 V turn-off. With VGS(th) ≥ 2.4 V and low gate leakage (<100 nA at 25 °C), zero-volt gate bias fully sustains cutoff under all operating temperatures, eliminating need for active negative bias circuitry in most high-side or half-bridge configurations.
PSMNR55-40SSHJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1235
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 500A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 0.55mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 267 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 21162 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 375W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK88 (SOT1235)
PSMNR55-40SSHJ FAQ
1.How can I place an order for PSMNR55-40SSHJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PSMNR55-40SSHJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PSMNR55-40SSHJ reliable?
The price and inventory of PSMNR55-40SSHJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PSMNR55-40SSHJ is usually 5 days.
3.What payment methods are accepted for PSMNR55-40SSHJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PSMNR55-40SSHJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PSMNR55-40SSHJ?
PSMNR55-40SSHJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PSMNR55-40SSHJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PSMNR55-40SSHJ?
For technical support, including PSMNR55-40SSHJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PSMNR55-40SSHJ requirements.
6.How does Aetrix verify that PSMNR55-40SSHJ is sourced from the original manufacturer or authorized distributors?
All PSMNR55-40SSHJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PSMNR55-40SSHJ meets industry standards.
7.What is the process for return or replacement of PSMNR55-40SSHJ?
All PSMNR55-40SSHJ units undergo pre-shipment inspection (PSI). If there is an issue with PSMNR55-40SSHJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PSMNR55-40SSHJ part is unused and in its original packaging.
Return procedure for PSMNR55-40SSHJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PSMNR55-40SSHJ Tags
-
BSZ180P03NS3EGATMA1
Infineon Technologies
-
SIRA14DP-T1-GE3
Vishay Siliconix
-
AO4419
Alpha & Omega Semiconductor Inc.
-
SISA14BDN-T1-GE3
Vishay Siliconix
-
PSMN9R5-30YLC,115
Nexperia USA Inc.
-
BUK9Y21-40E,115
Nexperia USA Inc.
-
RTQ035N03HZGTR
Rohm Semiconductor
-
FDMS7680
onsemi
-
RQ3E180BNTB
Rohm Semiconductor
-
STL6N2VH5
STMicroelectronics
-
DMPH4029LFGQ-7
Diodes Incorporated
-
DMT6015LSS-13
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
