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Microchip Technology MPLAD18KP48AE3
- Part No.:
- MPLAD18KP48AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP48AE3.pdf
- Description:
- TVS DIODE 48VWM 77.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
MPLAD18KP48AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤77.4 V under 233 A peak impulse current, and features a 48 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (53.3–58.9 V). Its low-profile thermoset epoxy package enables robust lightning protection per RTCA DO-160 Section 22 and secondary surge suppression per IEC 61000-4-5.
For engineers reviewing the MPLAD18KP48AE3 datasheet, MPLAD18KP48AE3 pinout, MPLAD18KP48AE3 application, or MPLAD18KP48AE3 equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant solderability are critical - especially in avionics power distribution, battery management inputs, and 48 V vehicle subsystems.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, triggered by avalanche breakdown above its specified V(BR) range (53.3–58.9 V). Its metal-base cathode construction provides direct thermal path to PCB copper, enabling sustained energy dissipation without case overheating. The device meets AEC-Q101 stress testing and supports MIL-PRF-19500 upscreening for extended reliability.
It is rated for 100% surge testing per lot, with 3σ screening on standby current (ID ≤10 μA @ 48 V), and exhibits <100 ps response time from 0 V to V(BR) min. Its clamping performance is validated under 42 Ω, 12 Ω, and 2 Ω source impedances per IEC 61000-4-5 Class 1–5, and supports RTCA DO-160F Waveform 4 (Level 4) and Waveform 5A (Level 4) pin injection protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated lightning surge energy without failure |
| Reverse Standoff Voltage (VWM) | 48 V - maximum continuous DC operating voltage before leakage exceeds 10 μA |
| Breakdown Voltage (V(BR)) | 53.3–58.9 V @ I(BR) - defines precise avalanche initiation threshold for predictable clamping onset |
| Max Clamping Voltage (VC) | 77.4 V @ IPP = 233 A - limits protected circuit voltage during worst-case surge event |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or copper pour, critical for repetitive surge duty |
| Standby Current (ID) | ≤10 μA @ 48 V - ensures negligible leakage in always-on 48 V systems like telecom or rail control |
| Response Time | <100 ps - sub-nanosecond turn-on guarantees protection of fast-edge digital interfaces and gate drivers |
Pinout & Package
Package: Surface-mount thermoset epoxy case (UL94V-0), void-free molded body with tin-lead or RoHS-compliant matte-tin plating; cathode terminal is the exposed metal base (bottom side); weight ≈1 g; pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Surge current entry point (unidirectional) | Connected to line/voltage rail being protected; conducts only during reverse-biased surge |
| Cathode (metal base) | Surge current return path & thermal interface | Soldered directly to large copper area or heatsink; serves dual role as electrical terminal and primary heat sink |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Validated at 10/1000 μs waveform - meets RTCA DO-160 Section 22 multi-stroke lightning requirements |
| Low RθJC = 0.7 °C/W | Enables >2× higher surge repetition rate vs. standard SMD TVS when mounted on 2 oz copper |
| RoHS-compliant e3 marking | Matte-tin plating meets J-STD-020B Level 1 moisture sensitivity - no dry pack required pre-reflow |
| 3σ lot screening on ID | Guarantees ≤10 μA leakage across full production lot - critical for low-power 48 V sensor nodes |
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, HTRB, and surge endurance - suitable for under-hood ECUs |
Applications
| Aerospace Power Distribution | Automotive 48 V Battery Management |
|---|---|
Use Scenario: Protection of main DC bus in fly-by-wire actuator controllers subjected to lightning-induced transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed at bus input to limit voltage excursion during multi-stroke events. Use Value: Withstands ≥500 surges at 18 kW without degradation, ensuring system-level DO-160 compliance without derating. |
Use Scenario: Input protection for 48 V battery monitoring ICs in mild-hybrid vehicles exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy away from precision ADC front-end and CAN transceivers. Use Value: Clamps to 77.4 V within 100 ps, preventing latch-up in 5 V logic rails powered from same 48 V domain. |
| Industrial DC UPS Inputs | Railway Signaling Power Supplies |
Use Scenario: Surge protection on 48 V DC input of uninterruptible power supplies used in data centers and telecom shelters. IC Role / Device Role / Timing Role: Secondary protection stage after MOV-based front-end, handling residual fast-rising transients. Use Value: Low clamping ratio (VC/VWM = 1.61) minimizes stress on downstream DC-DC converters and electrolytic capacitors. |
Use Scenario: Protection of 48 V auxiliary power feeds in ERTMS/ETCS signaling cabinets subject to traction-induced surges and EFT bursts. IC Role / Device Role / Timing Role: High-reliability TVS meeting EN 50121-3-2 for railway EMC, installed on board-level power entry. Use Value: Passes IEC 61000-4-4 (EFT) and IEC 61000-4-5 (42 Ω, Class 4) without parameter shift or visual damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ48A | Lower PPP (400 W), smaller SMC package, RθJC ≈ 12 °C/W, no AEC-Q101 or DO-160 qualification | Suitable for consumer-grade 48 V inputs; not rated for multi-stroke lightning or automotive under-hood use | Select when cost and board space are prioritized over aerospace/automotive reliability and 18 kW surge capacity |
| Vishay V26MLA1805 | Multi-layer varistor (MLV), bidirectional, 18 kW rating but slower response (~ns), higher clamping ratio (VC/VWM ≈ 2.2), no V(BR) specification | Better for lower-frequency surges (e.g., AC line coupling); less effective against fast ESD/EFT edges | Select when bidirectional protection and lower capacitance (<100 pF) are needed, but sub-100 ps response is not required |
Compared with SMAJ48A and V26MLA1805, the MPLAD18KP48AE3 uniquely combines 18 kW pulse handling, sub-100 ps response, AEC-Q101 + DO-160 qualification, and ultra-low thermal resistance - making it the only option for mission-critical 48 V DC bus protection where both speed and energy capacity are non-negotiable.
Availability
MPLAD18KP48AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive 48 V battery management, and industrial DC UPS inputs requiring stable component supply across long-lifecycle programs.
Supply support for MPLAD18KP48AE3 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD18KP48AE3 belongs to Microsemi's PLAD high-power TVS family, engineered specifically for aircraft lightning protection and automotive load-dump immunity - emphasizing thermal robustness, lot-traceable reliability, and compliance with RTCA DO-160 and AEC-Q101.
FAQ
What is the clamping voltage of MPLAD18KP48AE3 at its rated peak pulse current?
The MPLAD18KP48AE3 has a maximum clamping voltage (VC) of 77.4 V when subjected to its peak impulse current (IPP) of 233 A under 10/1000 μs waveform conditions. This value is measured at the device terminals and reflects worst-case voltage seen by downstream circuitry during a full-rated surge event. The clamping ratio (VC/VWM = 1.61) confirms tight voltage control relative to its 48 V standoff rating.
Is MPLAD18KP48AE3 qualified for automotive applications?
Yes, the MPLAD18KP48AE3 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance. It is explicitly designed for automotive 48 V systems such as battery management units and ADAS power domains, supporting load dump and jump-start transient suppression per ISO 7637-2 and SAE J1113-11.
Does MPLAD18KP48AE3 meet RTCA DO-160 lightning protection requirements?
Yes, the MPLAD18KP48AE3 is validated for RTCA DO-160F Section 22 multi-stroke lightning testing (Waveform 4, Level 4; Waveform 5A, Level 4) and is listed in the datasheet as compliant for VWM = 48 V variants. Its 18 kW rating, low RθJC, and metal-base thermal design enable reliable performance across repeated lightning strikes without parameter drift.
What is the polarity and pin configuration of MPLAD18KP48AE3?
The MPLAD18KP48AE3 is a unidirectional TVS diode with anode on the top surface and cathode on the exposed metal base (bottom side). The "A" suffix denotes unidirectional construction, and the cathode must be connected to ground or the lowest potential reference plane to ensure proper clamping action during positive-going transients on the anode side.
How does the thermal performance of MPLAD18KP48AE3 compare to standard SMC/SMB TVS diodes?
The MPLAD18KP48AE3 achieves a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W - over 15× lower than typical SMC-packaged TVS diodes (~12 °C/W). This is enabled by its metal-base construction and optimized internal die attach, allowing it to dissipate 18 kW surges with minimal temperature rise and sustain higher repetition rates in thermally constrained layouts.
MPLAD18KP48AE3 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 233A
- 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
MPLAD18KP48AE3 FAQ
1.How can I place an order for MPLAD18KP48AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP48AE3 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 MPLAD18KP48AE3 reliable?
The price and inventory of MPLAD18KP48AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP48AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP48AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP48AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP48AE3?
MPLAD18KP48AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP48AE3 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 MPLAD18KP48AE3?
For technical support, including MPLAD18KP48AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP48AE3 requirements.
6.How does Aetrix verify that MPLAD18KP48AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP48AE3 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 MPLAD18KP48AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP48AE3?
All MPLAD18KP48AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP48AE3, 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 MPLAD18KP48AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP48AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP48AE3 Tags
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