My Inquiry
My Account
Microchip Technology MPLAD18KP110A
- Part No.:
- MPLAD18KP110A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP110A.pdf
- Description:
- TVS DIODE 110VWM 177VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD18KP110A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps transients to ≤177 V at 1000 A, and features a 110 V reverse standoff voltage (VWM), 122–135 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4.
For engineers reviewing the MPLAD18KP110A datasheet, MPLAD18KP110A pinout, MPLAD18KP110A application, or MPLAD18KP110A equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance, and AEC-Q101 qualification are mandatory - especially in avionics power distribution units and 24/28 V aircraft subsystems.
Technical Context
The MPLAD18KP110A employs an avalanche diode structure optimized for fast response (<100 ps turn-on) and high cumulative energy handling. Its metal-base package provides direct thermal path to heatsink, supporting steady-state dissipation up to 71 W at TC = 100°C and enabling operation under repetitive surge conditions with ≤0.05% duty factor.
It meets RTCA DO-160F Section 22 lightning test requirements (Waveform 4, Level 4) and IEC 61000-4-5 Class 1–5 secondary protection with 42 Ω source impedance. Standby leakage current is ≤10 μA at 110 V, and temperature coefficient of V(BR) is +132 mV/°C - critical for stable clamping across -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains full-rated surge without degradation in aircraft load dump events |
| Reverse Standoff Voltage (VWM) | 110 V - matches nominal 100 V DC systems with 10% margin for ripple and tolerance |
| Clamping Voltage (VC) | 177 V @ 1000 A - limits downstream voltage stress to safe levels for 120 V-rated components |
| Breakdown Voltage (V(BR)) | 122–135 V @ I(BR) - ensures reliable avalanche initiation before system overvoltage damage |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper pour or external heatsink |
| Standby Leakage Current | ≤10 μA @ 110 V - minimizes quiescent power loss in always-on avionics circuits |
| Temperature Coefficient αV(BR) | +132 mV/°C - allows accurate derating of clamping performance over full -55°C to +150°C range |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-profile Anode-down) with metal base acting as cathode terminal; void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; polarity marked by cathode on metal backside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary thermal and electrical return path; must be soldered to large copper area or heatsink for RθJC = 0.7 °C/W |
| Top Surface Pad | Anode | High-current surge entry point; connects to protected line (e.g., 28 V DC bus); requires minimum 10 mm² copper pour |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW Surge Rating | Enables single-device protection against RTCA DO-160F Section 22 multi-stroke lightning (Waveform 4, Level 4) without parallel stacking |
| Low RθJC (0.7 °C/W) | Reduces junction temperature rise by >70% vs. standard SMC packages, extending lifetime under repetitive surges |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including HTOL, temperature cycling, and surge endurance testing |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - supports standard SMT assembly without baking |
| RoHS Compliant (e3) | Meets global environmental compliance without sacrificing surge performance or thermal capability |
Applications
| Avionics Power Distribution Unit (PDU) | Automotive 24 V Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in airborne mission computers against induced lightning transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed at PDU input stage to limit voltage excursion during 6.4/69 μs waveform injection. Use Value: Achieves Level 4 pin-injection immunity with no additional series impedance or filtering - reducing BOM count and board space. | Use Scenario: Safeguarding engine control unit (ECU) power rails during alternator load dump events in commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy directly to chassis ground via low-inductance metal-base mounting. Use Value: Withstands 18,000 W pulses while maintaining clamping below 177 V - protecting 120 V-rated DC-DC converters and CAN transceivers. |
| Industrial 48 V DC UPS Input Stage | Railway Signaling Power Interface |
Use Scenario: Securing backup battery-fed 48 V inputs in telecom UPS systems exposed to grid-switching transients. IC Role / Device Role / Timing Role: Secondary surge protector downstream of MOV-based primary stage, absorbing residual energy with precise VWM = 110 V. Use Value: Tight 122–135 V V(BR) window ensures clean turn-on without false triggering during 48 V nominal ripple. | Use Scenario: Protecting track-side signaling controllers connected to 110 V DC traction power lines subject to switching surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP110CA) used for AC-coupled signal isolation; unidirectional MPLAD18KP110A used for DC rail clamping. Use Value: 132 mV/°C αV(BR) enables predictable clamping shift across -40°C to +85°C railway ambient - simplifying thermal design margining. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ110A | 600 W rating, 110 V VWM, SMC package, RθJC ≈ 12 °C/W | Limited to single-stroke surges; unsuitable for DO-160F multi-stroke or repetitive load dump | Select only for cost-sensitive industrial applications with <500 W surge exposure |
| SMCJ110A | 1500 W rating, same VWM, larger SMC package, RθJC ≈ 5.5 °C/W | Cannot meet 18 kW PPP or DO-160F Level 4; lacks AEC-Q101 qualification | Use where footprint allows and surge energy is <1.5 kW - not for aerospace or high-reliability automotive |
Compared with SMBJ110A and SMCJ110A, the MPLAD18KP110A delivers 30× higher peak pulse power and 8× lower thermal resistance - making it the only viable choice for certified lightning protection in safety-critical avionics and heavy-duty vehicle electronics.
Availability
MPLAD18KP110A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and industrial 48 V UPS systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MPLAD18KP110A 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 MPLAD18KP110A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for DO-160F and AEC-Q101-compliant surge protection in mission-critical DC power interfaces.
FAQ
What is the maximum clamping voltage of the MPLAD18KP110A at its rated peak pulse current?
The MPLAD18KP110A has a maximum clamping voltage (VC) of 177 V when subjected to its rated peak pulse current of 1000 A under 10/1000 μs waveform conditions. This value is guaranteed across the full operating temperature range and ensures downstream components rated for 200 V withstand are adequately protected during surge events.
Is the MPLAD18KP110A qualified for automotive applications?
Yes, the MPLAD18KP110A is AEC-Q101 qualified, having undergone stress testing including high-temperature operating life, temperature cycling, and surge endurance. It is specified for use in automotive 24 V load dump protection circuits and meets the reliability requirements for engine control units and body electronics.
Does the MPLAD18KP110A require special PCB layout considerations?
Yes - the MPLAD18KP110A requires a minimum 10 mm² copper pour connected to its metal base (cathode) for thermal management, and short, wide traces to the anode pad to minimize inductance. The recommended pad layout specifies 12.32–12.57 mm × 10.54–10.80 mm footprint with 5.08–5.33 mm anode pad width to achieve RθJC = 0.7 °C/W.
How does the MPLAD18KP110A perform under repeated surge conditions?
The MPLAD18KP110A is rated for repetitive surges with ≤0.05% duty factor (e.g., one 10/1000 μs pulse every 2 seconds). Its low RθJC and high thermal mass allow junction temperature to stabilize below 150°C even under sustained 1000 A pulses - validated per RTCA DO-160F Section 22 multi-stroke lightning testing.
What is the polarity configuration of the MPLAD18KP110A?
The MPLAD18KP110A is a unidirectional TVS diode: the metal base (bottom side) is the cathode, and the top surface pad is the anode. This configuration provides forward conduction only during negative transients on the protected line - essential for DC bus protection where reverse polarity is not expected.
MPLAD18KP110A 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 102A
- 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
MPLAD18KP110A FAQ
1.How can I place an order for MPLAD18KP110A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP110A 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 MPLAD18KP110A reliable?
The price and inventory of MPLAD18KP110A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP110A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP110A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP110A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP110A?
MPLAD18KP110A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP110A 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 MPLAD18KP110A?
For technical support, including MPLAD18KP110A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP110A requirements.
6.How does Aetrix verify that MPLAD18KP110A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP110A 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 MPLAD18KP110A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP110A?
All MPLAD18KP110A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP110A, 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 MPLAD18KP110A part is unused and in its original packaging.
Return procedure for MPLAD18KP110A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP110A 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…
