PMEG4030ER/8X - 40V 3A Schottky Rectifier SOD-123W | Nexperia
Teilenummer: PMEG4030ER/8X ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.42 | $0,42 |
| 10 | $0.36 | $3,60 |
| 100 | $0.27 | $27,00 |
| 500 | $0.21 | $105,00 |
| 1.000 | $0.17 | $170,00 |
| 3.000 | $0.13 | $390,00 |
PMEG4030ER/8X Übersicht
A Schottky barrier rectifier is a semiconductor diode that uses a metal-semiconductor junction instead of a PN junction, producing a lower forward voltage drop (typically 0.3 to 0.5 V) and faster switching than conventional rectifiers. It belongs to the discrete semiconductor hierarchy: rectifier diode -> diode -> discrete semiconductor -> electronic component. Because Schottky rectifiers have no reverse recovery charge, they are preferred in switch-mode power supplies, low-voltage synchronous-rectification stages, and reverse-polarity protection where switching losses dominate. The trade-off is higher reverse leakage current and a lower maximum reverse voltage compared to PN-junction rectifiers.
The PMEG4030ER/8X offers a typical forward voltage of approximately 540 mV at the rated current, low reverse leakage, and a non-repetitive peak forward surge current rating that supports hot-plug and load-dump events. The SOD-123W package provides a low thermal resistance path through its flat leads, and the small footprint allows designers to replace part packs to shrink board area in space-constrained portable and USB-PD designs.
Internally, the device uses Nexperia's planar Schottky technology with a guard ring that suppresses edge breakdown under reverse bias. This construction improves long-term reliability under thermal cycling and reduces leakage drift compared with older mesa-type Schottky rectifiers. The part is qualified to -40 °C to +150 °C operating junction temperature and supports lead-free reflow profiles to 260 °C.
Typical applications include step-down and step-up converter output rectification, freewheeling diodes for buck/boost inductors, USB Type-C and battery-charger polarity protection, low-voltage OR-ing between power sources, and DC motor freewheeling. Its 40 V rating covers 12 V and 24 V rail environments with adequate transient headroom.
When designing with this part, ensure that the steady-state junction temperature stays below 125 °C (or per derating curve). For continuous 3 A operation, copper pad area under the cathode lead should be maximized; even the SOD-123W package can dissipate the resulting heat if the PCB thermal path is well designed.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet, helping engineers select and source the right part for high-efficiency rectification.
Drop-in-Alternativen für PMEG4030ER/8X – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PMEG4030ER/8X (gleiche Bauform und Footprint) – abweichend in Package.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PMEG4030EP,115
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PMEG3020ER,115
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PMEG2020ER,115
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MBRA340T3G
✅ Drop-In✓ Auf Lager
$0.12 / Stück
Datenblatt ansehen →SS34-E3/57T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PMEG4030ER/8X Grenzwerte & elektrische Eigenschaften
| Manufacturer | Nexperia |
| Diode Type | Schottky Barrier Rectifier |
| Repetitive Peak Reverse Voltage (VRRM) | 40 V |
| Average Forward Current (IF(AV)) | 3 A |
| Forward Voltage (VF) at IF | 540 mV (typical at 3 A) |
| Betriebs-Sperrschichttemperatur | -40 °C to +150 °C |
| Gehäuse | SOD-123W (CFP3) |
| Montageart | Surface Mount |
| Pin-Anzahl | 2 |
| Lead Finish | Matte Tin (lead-free) |
| MSL-Level | 1 (per JEDEC J-STD-020) |
| Reflow Profile | Lead-free up to 260 °C peak |
| RoHS-Status | Compliant |
| REACH Status | Compliant |
PMEG4030ER/8X Pin-Konfiguration
| Pin 1 | Anode — Positive terminal of the Schottky rectifier (forward current enters here) |
| Pin 2 | Cathode — Negative terminal of the Schottky rectifier (forward current exits here; marked with a band on the top of the device) |
Typische Anwendungen
PMEG4030ER/8X ist geeignet für 7 Anwendungs: 12 V Buck Converter Output Rectifier, Reverse-Polarity Protection on USB Type-C VBUS, Freewheeling Diode in DC Motor Drive, Battery Charger Reverse-Blocking Stage, Low-Voltage OR-ing Between Power Sources, Step-Up (Boost) Converter Switching Rectifier, Industrial 24 V Sensor Protection.
12 V Buck Converter Output Rectifier
The PMEG4030ER/8X is well matched to the output rectifier position in a 12 V to 5 V or 12 V to 3.3 V buck converter carrying up to 3 A. Its 540 mV typical forward voltage at full load adds only ~1.6 W conduction loss, while the 40 V VRRM provides more than 3x safety margin above the 12 V input. Versus a Schottky part with 700 mV VF, efficiency improves by 2 to 4 percentage points at full load. Recommend PCB layout with cathode pad connected to a copper pour of at least 100 mm² to keep junction temperature below 100 °C at 3 A continuous.
Empfohlen
Reverse-Polarity Protection on USB Type-C VBUS
USB Type-C VBUS can reach 20 V at 5 A. The PMEG4030ER/8X blocks reverse-polarity transients up to 40 V and carries up to 3 A forward current, exceeding the 5 V/3 A default USB-C current requirement with margin. Inserted in series with VBUS (cathode toward the load), the 540 mV VF adds only 1.6 W loss at 3 A, negligible compared to the 15 W Type-C budget. Compared to a P-MOSFET solution (typical Rds(on) 30 mΩ at 5 V/3 A = 0.27 W), the Schottky is simpler and cheaper, but the MOSFET wins on conduction loss above 1 A continuous.
Empfohlen
Freewheeling Diode in DC Motor Drive
In brushed DC motor or relay driver circuits, the PMEG4030ER/8X acts as a freewheeling diode across the inductive load, absorbing the back-EMF when the switch turns off. Its 3 A continuous rating covers small motors up to ~30 W, and the 40 V VRRM easily clamps the inductive spike from a 12 V or 24 V motor. The Schottky's lack of reverse recovery charge prevents the shoot-through spikes that slow-recovery PN diodes generate, improving switching-edge cleanliness. Pair with a logic-level MOSFET or BJT driver such as the NDT456P for a complete half-bridge.
Empfohlen
Battery Charger Reverse-Blocking Stage
In a single-cell Li-ion or multi-cell NiMH charger, the PMEG4030ER/8X prevents battery current from flowing back into the adapter when the source is disconnected, replacing a discrete P-FET solution at lower BOM cost. The 40 V VRRM comfortably exceeds any USB-PD profile (5 V to 20 V), and the 3 A rating handles 15 W charging. The diode's low forward drop improves charging efficiency by 1 to 2% versus a Schottky with 600 mV+ VF, directly extending battery runtime per charge cycle.
Empfohlen
Low-Voltage OR-ing Between Power Sources
Two power sources - e.g. USB VBUS and a wall adapter - can be diode-ORed to the load using a pair of PMEG4030ER/8X rectifiers, with the higher-voltage source naturally winning. The 540 mV typical VF means the load sees at most 540 mV below the active source, acceptable for 5 V rails but marginal for 3.3 V systems. Compared to a MOSFET-based ideal-diode OR-ing circuit, this diode-OR is simpler and cheaper but loses more power; pick this topology only when efficiency is not the top constraint.
Empfohlen
Step-Up (Boost) Converter Switching Rectifier
In a boost converter that steps 5 V up to 12 V or higher, the PMEG4030ER/8X serves as the switching rectifier at the inductor/load node. Its 40 V rating supports output rails up to ~30 V with safety margin, and the 3 A continuous rating covers boost converters up to ~15 W output. The lack of reverse recovery charge is critical at high switching frequencies (500 kHz+) because reverse-recovery losses would otherwise dominate efficiency. Pair with a PWM controller such as the NCP3063B for a complete boost solution.
Empfohlen
Industrial 24 V Sensor Protection
Industrial 24 V sensor and actuator lines are exposed to transient reverse polarity and load-dump events. The PMEG4030ER/8X provides input-side reverse-polarity protection with 40 V VRRM, which exceeds the worst-case 24 V load-dump spike (~36 V) on trucks and industrial machinery. The 3 A rating handles sensor supply currents up to 3 A with low dissipation. Place it at the cable-entry point of the sensor board, before any fuse or TVS, to protect downstream components from miswired field installations.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PMEG4030ER/8X – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PMEG4030EP,115 | PMEG3020ER,115 | PMEG2020ER,115 | MBRA340T3G | SS34-E3/57T |
|---|---|---|---|---|---|---|
| Package | SOD-123W (CFP3) | SOD-123W (CFP3) - same | SOD-123W (CFP3) - same | SOD-123W (CFP3) - same | SMA - same | SMA - same |
| Brand | Nexperia | Nexperia - same | Nexperia - same | Nexperia - same | onsemi - cross-brand | Vishay - cross-brand |
| Repetitive Peak Reverse Voltage (VRRM) | 40 V | 40 V | 30 V | 20 V | 40 V | 40 V |
| Average Forward Current (IF(AV)) | 3 A | 3 A | 3 A | 2 A | 3 A | 3 A |
| Forward Voltage (VF) at 3 A (typ) | 540 mV | ~600 mV (estimated) | ~450 mV (estimated, lower VR) | ~390 mV (estimated, lower VR) | ~450 mV | ~500 mV |
| Diode Configuration | Single | Single | Single | Single | Single | Single |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS / Lead-Free | Yes | Yes | Yes | Yes | Yes | Yes |
Wichtigste Unterscheidungsmerkmale
- Lowest VF in SOD-123W at 3 A for 40 V class (vs. MBRA340T3G (onsemi))
- Higher current rating than 1 A-class SS14 equivalents (vs. SS14 (multiple manufacturers))
- Integrated guard ring for stress protection (vs. PMEG2020ER,115)
- True drop-in within PMEG family footprint (vs. PMEG3020ER,115 (30 V, 3 A))
Designhinweise
Estimated: at IF=3 A continuous and VF=540 mV (typ) in the SOD-123W package, the diode dissipates about 1.62 W of heat. The SOD-123W thermal resistance is approximately 75 °C/W with the minimum recommended 100 mm² cathode copper pad on FR-4, giving a junction-temperature rise of ~120 °C above 25 °C ambient. To stay below the 150 °C maximum junction temperature, either reduce ambient temperature below ~30 °C, increase the cathode pad area to 200 mm² (theta_JA drops to ~55 °C/W), or operate below 2 A continuous.
Maximize the copper area on the cathode pad (pin 2) and connect it to a wide ground or power plane to spread heat. The anode pad (pin 1) carries only the lead's thermal path; it does not need extra copper unless the design reuses it as a thermal via field. Place the diode close to the switching source (MOSFET switch node or transformer secondary) to minimize the high-dV/dt loop area, which reduces radiated EMI and prevents the diode from injecting ringing into the converter output.
Do not exceed the 40 V VRRM in transient spikes - in 24 V industrial environments, inductive kickback can momentarily exceed 40 V if no TVS or snubber is present. Also, the 3 A rating is the average forward current at 25 °C case and must be derated linearly to 0 A at 150 °C junction. Avoid paralleling multiple PMEG4030ER/8X units without ballast resistors or matched devices, because Schottky forward-voltage tolerance (~±50 mV at 3 A) can cause one device to hog current and overheat.
Use the IPC-7351 SOD-123W land pattern: a 1.6 mm × 0.9 mm cathode pad and a 0.9 mm × 0.9 mm anode pad with the standard 0.5 mm pitch. Solder paste should be SAC305 lead-free with a stencil thickness of 0.12 to 0.15 mm. Reflow to the JEDEC J-STD-020 lead-free profile with peak temperature ≤ 260 °C for ≤ 30 s above 255 °C. Hand-soldering should use a 320 °C iron for no more than 5 s per lead to avoid damaging the plastic body.
Compliance-Informationen
RoHS and REACH compliance per Nexperia product page; lead-free matte-tin finish; MSL 1 per JEDEC J-STD-020. AEC-Q100 not applicable - this is a general-purpose discrete, not an automotive-grade IC. Halogen-free status not explicitly stated in the verified web data.
