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Microchip Technology MPLAD36KP48AE3
- Part No.:
- MPLAD36KP48AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP48AE3.pdf
- Description:
- TVS DIODE 48VWM 77.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
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Product details
Overview
MPLAD36KP48AE3 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 36 kW peak pulse power at 10/1000 μs, clamps at ≤77.4 V under 466 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 IEC 61000-4-5 Class 4/5.
For engineers reviewing the MPLAD36KP48AE3 datasheet, MPLAD36KP48AE3 pinout, MPLAD36KP48AE3 application, or MPLAD36KP48AE3 equivalent, this device is selected for high-reliability DC bus protection where fast response (<100 ps), low thermal resistance (RθJC = 1.0 °C/W), and multi-stroke surge endurance are critical - especially in avionics power distribution, vehicle ECU inputs, and industrial PLC front-ends.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging avalanche breakdown to divert transients away from sensitive downstream circuitry. Its unidirectional polarity places the cathode on the metal base (package bottom), requiring correct PCB orientation for proper DC bias alignment and surge path integrity.
It meets AEC-Q101 stress testing requirements and supports secondary lightning protection per IEC 61000-4-5 with 2 Ω, 12 Ω, and 42 Ω source impedances - validated up to Class 5 for short-distance coupling and Class 4 for long-distance configurations. Pin injection immunity per RTCA/DO-160F Waveform 4 (Level 4) and Waveform 5A (Level 4) is confirmed for 48 V-rated variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated lightning surge energy without failure under defined duty cycle (≤0.05%) |
| Reverse Standoff Voltage (VWM) | 48 V - maximum continuous DC or peak AC voltage the device blocks during normal operation |
| Breakdown Voltage (V(BR)) | 53.3–58.9 V @ 5 mA - ensures reliable avalanche initiation above operating rail while avoiding false triggering |
| Max Clamping Voltage (VC) | 77.4 V @ 466 A - limits downstream voltage stress to safe levels during worst-case surge events |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or copper pour, critical for repetitive surge handling |
| Standby Current (ID) | 10 μA @ 48 V - negligible leakage that avoids system power drain or false fault detection |
| Temperature Range | −55 °C to +150 °C - qualified for extended operation in engine bays, avionics bays, and outdoor industrial enclosures |
Pinout & Package
Package: PLAD - low-profile void-free transfer-molded thermosetting epoxy case (UL94V-0), metal base cathode termination, RoHS-compliant matte-tin plating. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Surge current entry point during reverse-biased transient | Connected to protected line (e.g., 48 V DC bus); must be routed with low-inductance trace |
| Cathode (metal base) | Surge current return path to ground/reference | Requires direct thermal and electrical connection to large copper area or heatsink for RθJC = 1.0 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Full fabrication and assembly lot tracking per MIL-PRF-19500 upscreening options available |
| RTCA DO-160 Section 22 compliance | Validated multi-stroke lightning protection for aircraft power systems (Waveform 4 Level 4, Waveform 5A Level 4) |
| IEC 61000-4-5 Class 4/5 support | Secondary lightning protection with 2 Ω, 12 Ω, and 42 Ω source impedance configurations |
| Moisture sensitivity level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage |
| AEC-Q101 qualification | Stress-tested for automotive electronics reliability including temperature cycling, HTRB, and surge endurance |
Applications
| Aerospace Power Distribution | Automotive ECU Input Protection |
|---|---|
|
Use Scenario: Protecting 28 V / 48 V DC distribution buses in commercial aircraft against induced lightning transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed at bus entry point to shunt surge current directly to chassis ground before reaching downstream converters and controllers. Use Value: Enables compliance with Level 4 pin-injection immunity (Waveform 4) and Class 5 secondary lightning protection without derating at 48 V nominal rails. |
Use Scenario: Safeguarding microcontroller I/O and power supply inputs in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Front-end transient suppressor on battery-fed 48 V subsystems, activated within <100 ps to limit clamped voltage to 77.4 V. Use Value: Prevents latch-up or gate oxide damage in 40 V-rated power management ICs during 120 V/50 ms load dump events. |
| Industrial PLC Field I/O Protection | Railway Signaling Interface Protection |
|
Use Scenario: Shielding analog and digital input modules in programmable logic controllers from EFT bursts and induced surges in factory-floor environments. IC Role / Device Role / Timing Role: Primary surge arrestor on 48 V sensor power lines and 24 V signal returns, coordinated with upstream fusing. Use Value: Withstands ≥1000 surge events at 466 A (10/1000 μs) while maintaining VWM stability and low standby leakage (10 μA). |
Use Scenario: Securing communication interfaces (e.g., RS-485, CAN) in railway signaling cabinets subjected to traction-induced surges per EN 50121-4. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (though MPLAD36KP48AE3 is unidirectional, used in DC-coupled rail protection layers). Use Value: Provides 36 kW surge capacity with 1.0 °C/W thermal resistance - enabling compact mounting on rail-mounted DIN-rail PCBs with minimal heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A | Lower PPP rating (600 W), SMA package, RθJA = 50 °C/W, no AEC-Q101 or DO-160 validation | Suitable only for consumer-grade single-stroke surge events; insufficient for aerospace multi-stroke or automotive load dump | Select SMBJ48A only for cost-sensitive, non-safety-critical 48 V circuits with infrequent transients. |
| SMCJ48A | Higher PPP (1500 W) than SMBJ but still 24× lower than MPLAD36KP48AE3; TO-277 package; no DO-160 certification data | Limited to industrial equipment with moderate surge exposure; lacks traceability and upscreening options | Choose SMCJ48A when board space allows larger SMC package and DO-160/IEC 61000-4-5 Class 4/5 compliance is not required. |
Compared with SMBJ48A and SMCJ48A, the MPLAD36KP48AE3 delivers 24–60× higher peak pulse power, certified multi-stroke lightning resilience, AEC-Q101 qualification, and thermal performance optimized for sustained surge duty - making it the sole option for mission-critical 48 V rail protection in aviation and heavy-duty automotive systems.
Availability
MPLAD36KP48AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial PLC field I/O requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP48AE3 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 semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and safety-critical applications.
The MPLAD series was developed specifically for surface-mount high-energy transient suppression in avionics and automotive systems where multi-stroke lightning resilience, thermal efficiency, and lot-level traceability are mandatory.
FAQ
What is the clamping voltage of the MPLAD36KP48AE3 under maximum rated surge current?
The MPLAD36KP48AE3 exhibits a maximum clamping voltage (VC) of 77.4 V when subjected to its peak impulse current of 466 A under the standard 10/1000 μs waveform. This value is measured at 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events, ensuring compatibility with 40–60 V-rated downstream components.
Is the MPLAD36KP48AE3 suitable for bidirectional signal line protection?
No - the MPLAD36KP48AE3 is a unidirectional TVS diode, with polarity marked by cathode placement on the metal base. For bidirectional protection, Microsemi offers the MPLAD36KP48CA variant. Using MPLAD36KP48AE3 on AC or bipolar signal lines risks forward conduction during negative excursions and invalidates clamping performance claims.
Does the MPLAD36KP48AE3 require a heatsink for reliable operation?
While the MPLAD36KP48AE3 achieves RθJC = 1.0 °C/W, its junction-to-ambient thermal resistance (RθJA) is 50 °C/W on FR4. For single-event surge handling, no external heatsink is needed. However, for repetitive surges (>0.05% duty cycle), a thermally enhanced pad layout or copper pour beneath the metal base is essential to maintain junction temperature below 150°C.
What certifications does the MPLAD36KP48AE3 meet for automotive use?
The MPLAD36KP48AE3 is qualified to AEC-Q101 for stress testing including HTGB, HTRB, and surge endurance. It also supports ISO 7637-2 load dump protection indirectly via its 36 kW rating and 466 A IPP - though formal ISO 7637-2 test reports are not published, its DO-160F and IEC 61000-4-5 validation provide equivalent surge robustness for 48 V automotive subsystems.
How does the e3 suffix in MPLAD36KP48AE3 affect compliance and assembly?
"E3" denotes RoHS-compliant matte-tin plating per JEDEC J-STD-020B, eliminating lead while maintaining solderability per MIL-STD-750 Method 2026. It requires no special reflow profile beyond standard Pb-free processes and carries moisture sensitivity level 1 - meaning the MPLAD36KP48AE3 can be stored and assembled without dry packing or baking, reducing manufacturing overhead.
MPLAD36KP48AE3 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):
- 466A
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MPLAD36KP48AE3 FAQ
1.How can I place an order for MPLAD36KP48AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP48AE3 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 MPLAD36KP48AE3 reliable?
The price and inventory of MPLAD36KP48AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP48AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP48AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP48AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP48AE3?
MPLAD36KP48AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP48AE3 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 MPLAD36KP48AE3?
For technical support, including MPLAD36KP48AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP48AE3 requirements.
6.How does Aetrix verify that MPLAD36KP48AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP48AE3 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 MPLAD36KP48AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP48AE3?
All MPLAD36KP48AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP48AE3, 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 MPLAD36KP48AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP48AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP48AE3 Tags
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