My Inquiry
My Account
Microchip Technology MPLAD18KP40AE3
- Part No.:
- MPLAD18KP40AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP40AE3.pdf
- Description:
- TVS DIODE 40VWM 64.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,485
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD18KP40AE3 from Microsemi is a surface-mount, unidirectional transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤64.5 V under 280 A peak impulse current, and features a 40 V reverse standoff voltage (VWM) with 44.4–49.1 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 pin injection requirements.
For engineers reviewing the MPLAD18KP40AE3 datasheet, MPLAD18KP40AE3 pinout, MPLAD18KP40AE3 application, or MPLAD18KP40AE3 equivalent, this device is selected for secondary lightning protection (IEC 61000-4-5), load dump suppression in 24 V vehicle electronics, and high-reliability avionics transients where low thermal resistance (RθJC = 0.7 °C/W) and RoHS-compliant e3 plating are mandatory.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, triggered by avalanche breakdown above its specified V(BR) range. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting high-duty-cycle surge handling when mounted per recommended FR4 pad layout.
It is characterized for 10/1000 μs double-exponential transients and validated for multi-stroke lightning compliance (RTCA DO-160 Section 22). Standby leakage (ID ≤10 μA @ 40 V) and temperature coefficient (αV(BR) = 45 mV/°C) are tightly controlled via 3σ lot norm screening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 40 V - matches nominal 24 V system rail with 67% headroom for transients |
| Clamping Voltage (VC) | 64.5 V @ 280 A - limits downstream IC stress below 65 V during worst-case surge |
| Breakdown Voltage (V(BR)) | 44.4–49.1 V @ I(BR) - ensures reliable turn-on before protected circuit damage |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables >70 W steady-state dissipation with minimal heatsink mass |
| RoHS Compliance | e3 matte-tin plating - satisfies IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, no dry pack required |
| Surge Rating | AEC-Q101 qualified - validated for automotive under-hood reliability including thermal cycling and humidity exposure |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-profile Anode-down) with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. Cathode is the exposed metal bottom surface; anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Metal Base) | Current Sink / Ground Reference | Direct thermal path to PCB copper pour or heatsink; must be soldered to large thermal pad per datasheet layout |
| Anode (Top Metallization) | Current Source / Signal Input | Connected to protected line (e.g., 24 V supply rail); requires trace routing with minimal inductance |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile thermal design | RθJC = 0.7 °C/W enables compact placement on space-constrained avionics PCBs while maintaining junction temp <150°C under repeated surges |
| Multi-standard surge compliance | Validated for IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source), RTCA DO-160F Waveform 4 Level 4, and ESD/EFT per IEC 61000-4-2/-4 |
| High-reliability wafer traceability | Fabrication and assembly lot tracking supports MIL-PRF-19500 upscreening for defense/aerospace programs requiring full pedigree documentation |
| Stable parametric screening | 3σ lot norm testing on standby current (ID) ensures <10 μA leakage across temperature, critical for low-power always-on systems |
| Robust mechanical construction | UL94V-0 void-free epoxy body withstands vibration, thermal shock, and humidity per AEC-Q101 qualification |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC bus in flight control actuators against lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed at bus entry point, absorbing multi-stroke surges up to 18 kW without degradation. Use Value: Enables compliance with Level 4 pin injection (Waveform 4) and eliminates need for external heatsinking due to RθJC = 0.7 °C/W. | Use Scenario: Safeguarding 24 V supply inputs of diesel engine ECUs during alternator load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy to chassis ground within 100 ps, limiting voltage to ≤64.5 V. Use Value: Prevents microcontroller reset or CAN transceiver latch-up by clamping below 65 V while surviving 1500 A forward surge (IFSM). |
| Railway Signaling Interface | Industrial Motor Drive DC Link |
Use Scenario: Secondary protection on 36 V signaling lines in ERTMS/ETCS Level 2 trackside equipment exposed to induced surges. IC Role / Device Role / Timing Role: IEC 61000-4-5 Class 3 compliant TVS with 42 Ω source impedance, placed after primary gas discharge tube. Use Value: Provides precise clamping (64.5 V max) with <10 μA leakage, ensuring signal integrity in low-current sensor loops. | Use Scenario: Transient suppression on 400 V DC link of variable-frequency drives subjected to switching-induced voltage spikes. IC Role / Device Role / Timing Role: High-energy TVS absorbing repetitive 10/1000 μs transients generated by IGBT commutation. Use Value: Sustains 18,000 W peak power without parameter shift, verified by 100% surge testing per production lot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | 600 W PPP rating (vs. 18,000 W); SMA package; RθJC ≈ 40 °C/W | Not suitable for DO-160F Level 4 or multi-stroke lightning; limited to consumer/industrial single-event surges | Select only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ40A | 1500 W PPP rating; SMC package; clamping voltage 64.5 V same, but IPP = 22.5 A (vs. 280 A) | Cannot meet RTCA DO-160F Waveform 4 Level 4 or IEC 61000-4-5 Class 4 with 42 Ω source | Acceptable for basic automotive ISO 7637-2 protection, but not for aerospace or high-reliability load dump |
Compared with SMBJ40A and SMCJ40A, the MPLAD18KP40AE3 provides 30× higher peak pulse power and 12× greater peak current handling-enabling use in mission-critical avionics and heavy-duty automotive systems where single-event robustness is insufficient.
Availability
MPLAD18KP40AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive engine control, railway signaling, and industrial motor drive applications requiring stable component supply and long-term lifecycle support.
Supply support for MPLAD18KP40AE3 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
Microsemi Corporation (now part of Microchip Technology) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MPLAD18KP40AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical platforms.
FAQ
What is the maximum clamping voltage of the MPLAD18KP40AE3 under rated surge conditions?
The MPLAD18KP40AE3 has a maximum clamping voltage (VC) of 64.5 V at 280 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed across temperature and ensures protected circuits remain below critical voltage thresholds during surge events. The MPLAD18KP40AE3 achieves this performance while maintaining low thermal resistance (0.7 °C/W) for repeatable operation.
Is the MPLAD18KP40AE3 suitable for RTCA DO-160F lightning protection compliance?
Yes, the MPLAD18KP40AE3 is validated for RTCA DO-160F Section 22 multi-stroke lightning testing and specifically rated for Waveform 4 (6.4/69 μs) Level 4 pin injection protection at 25 °C. Its 18,000 W peak pulse power and low clamping voltage enable compliance without additional series impedance. The MPLAD18KP40AE3 data sheet explicitly lists it among qualified parts for this standard.
How does the e3 suffix in MPLAD18KP40AE3 affect its manufacturing and reliability?
The e3 suffix indicates RoHS-compliant matte-tin plating per J-STD-020B Level 1 moisture sensitivity-eliminating dry pack requirements and enabling standard reflow profiles. This finish maintains solderability per MIL-STD-750 Method 2026 and supports AEC-Q101 qualification. The MPLAD18KP40AE3 uses the same wafer fabrication and lot traceability as non-RoHS variants, preserving high-reliability pedigree.
What thermal management considerations apply to the MPLAD18KP40AE3 in continuous operation?
The MPLAD18KP40AE3 relies on its metal base cathode for thermal conduction; optimal performance requires mounting on a ≥10 cm² copper pad with ≥4 thermal vias to internal ground planes. At TC = 100 °C, steady-state power dissipation is 71 W-enabled by RθJC = 0.7 °C/W. Derating curves (Figure 3) show PPP drops to 12 kW at 125 °C case temperature. The MPLAD18KP40AE3 datasheet specifies exact pad layout dimensions for thermal validation.
Can the MPLAD18KP40AE3 replace bidirectional TVS devices in differential signal protection?
No-the MPLAD18KP40AE3 is unidirectional (A suffix) and conducts only in reverse bias; it cannot protect AC or bidirectional signals like RS-485 or CAN bus. For such applications, the bidirectional MPLAD18KP40CA variant must be used. The MPLAD18KP40AE3 polarity is fixed: cathode is the metal base, anode is top metallization-incorrect orientation causes catastrophic short-circuit during normal operation.
MPLAD18KP40AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 280A
- Power - Peak Pulse:
- 18000W (18kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD18KP40AE3 FAQ
1.How can I place an order for MPLAD18KP40AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP40AE3 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 MPLAD18KP40AE3 reliable?
The price and inventory of MPLAD18KP40AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP40AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP40AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP40AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP40AE3?
MPLAD18KP40AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP40AE3 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 MPLAD18KP40AE3?
For technical support, including MPLAD18KP40AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP40AE3 requirements.
6.How does Aetrix verify that MPLAD18KP40AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP40AE3 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 MPLAD18KP40AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP40AE3?
All MPLAD18KP40AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP40AE3, 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 MPLAD18KP40AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP40AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP40AE3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
