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Microchip Technology MAPLAD18KP150AE3
- Part No.:
- MAPLAD18KP150AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP150AE3.pdf
- Description:
- TVS DIODE 150VWM 243VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,584
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Product details
Overview
MAPLAD18KP150AE3 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, features a 150 V reverse standoff voltage (VWM), clamps to ≤243 V at 75 A peak impulse current (IPP), and exhibits <5 ns response time. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP150AE3 datasheet, MAPLAD18KP150AE3 pinout, MAPLAD18KP150AE3 application, or MAPLAD18KP150AE3 equivalent, this device is selected for high-reliability DC bus protection where fast clamping, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant packaging, and multi-stroke lightning resilience are critical - especially in avionics power distribution and 48 V automotive load-dump circuits.
Technical Context
This TVS diode employs a planar silicon avalanche structure optimized for high-energy transients, with junction-to-case thermal resistance of 0.7 °C/W enabling effective heat transfer to PCB copper pads or heatsinks. Its unidirectional polarity places the cathode on the metal base (package bottom), requiring correct board-side thermal pad layout per Microsemi's recommended footprint.
The device operates under strict derating above 25°C ambient, with peak pulse power dropping to 71 W at TC = 100°C and full 18 kW only valid at TJ ≤ 150°C with controlled case temperature. It supports IEC 61000-4-2 ESD (±15 kV air), IEC 61000-4-4 EFT (40 A), and RTCA DO-160F pin-injection waveforms without degradation when mounted per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges without failure in aircraft power systems |
| Reverse Standoff Voltage (VWM) | 150 V - maximum continuous DC or peak AC voltage before clamping initiates; matches 125 V nominal 48 V+ systems |
| Clamping Voltage (VC) | 243 V @ IPP = 75 A - limits downstream voltage stress during surge, ensuring safe margin below 28 V system insulation ratings |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal coupling to PCB ground plane or heatsink, critical for repeated surge duty cycles |
| Response Time | <5 ns - suppresses fast-rising transients (e.g., inductive switch-off) before sensitive circuitry reacts |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - defines continuous leakage handling capability; derates to zero at TJ = 150°C |
| Temperature Range | −55°C to +150°C - supports operation in engine bay, avionics bays, and industrial enclosures without derating |
Pinout & Package
MAPLAD18KP150AE3 uses a surface-mount plastic package with void-free UL94V-0 epoxy body and matte-tin-plated terminals. The cathode is located on the metal base (bottom side); anode connects to the top-side metallized terminals. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side terminals) | Surge current entry point during reverse-bias transient | Connected to protected line (e.g., 48 V rail); must be routed with low-inductance trace to minimize overshoot |
| Cathode (metal base) | Surge current return path and primary thermal interface | Must be soldered to large copper thermal pad (per Microsemi pad layout) to achieve RθJC = 0.7 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified reliability | Validated for automotive power electronics with wafer lot traceability and 3σ screening on standby current (ID) |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection surges up to 150 V VWM devices - certified for airborne equipment installation |
| IEC 61000-4-5 Class 1–5 secondary lightning protection | Validated at 42 Ω, 12 Ω, and 2 Ω source impedances - covers full range of aircraft and industrial surge test profiles |
| RoHS-compliant (e3) plating | Matte-tin termination compatible with lead-free reflow (260°C/10 s) and IPC/JEDEC J-STD-020B Level 1 moisture sensitivity |
| Low-profile SMT form factor | Height ≤5.33 mm - fits constrained avionics modules and high-density power converters without mechanical interference |
Applications
| Aerospace Power Distribution | Automotive 48 V Load-Dump Protection |
|---|---|
Use Scenario: Protection of 28 V DC distribution buses in commercial aircraft against lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed across main bus input to clamp induced surges within 5 ns, limiting voltage to <243 V. Use Value: Enables compliance with multi-stroke lightning standard (≥100 surges at 18 kW) without parameter drift or thermal runaway. |
Use Scenario: Guarding 48 V battery-fed ECUs (e.g., ADAS controllers) against alternator load-dump spikes up to 60 V. IC Role / Device Role / Timing Role: Primary surge shunt on battery input rail; clamps 120 V transients to 243 V before downstream DC/DC converters. Use Value: Prevents latch-up or destruction of 36 V-rated MOSFETs and gate drivers during ISO 16750-2 load-dump events. |
| Industrial Motor Drive DC Bus | Railway Traction Control Interface |
Use Scenario: Safeguarding IGBT gate drivers and current sensors on 300–600 V DC bus lines exposed to switching transients and EFT noise. IC Role / Device Role / Timing Role: Secondary TVS parallel to bulk capacitance; absorbs residual energy after MOV-based front-end suppression. Use Value: Reduces voltage overshoot by >40% versus standalone MOVs, extending sensor lifetime in harsh factory environments. |
Use Scenario: Protecting CAN and Ethernet interfaces in onboard traction control units from 2 Ω-source lightning surges per EN 50121-3-2. IC Role / Device Role / Timing Role: Bidirectional-capable variant used (MPLAD18KP150CA); here, unidirectional MAPLAD18KP150AE3 guards DC supply rails feeding those interfaces. Use Value: Maintains functional safety integrity by preventing common-mode surge coupling into signal domains via shared power rails. |
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 SMAJ150A | Lower PPP (400 W), smaller SMC package (RθJC ≈ 25 °C/W), no AEC-Q101 or DO-160 qualification | Suitable for consumer-grade 150 V DC inputs; insufficient for multi-stroke lightning or automotive Grade 0 environments | Select MAPLAD18KP150AE3 when 18 kW surge handling, thermal performance, or aviation certification is required. |
| Vishay V275SM3 | Higher VWM (275 V), lower IPP (32 A), non-RoHS (SnPb) default, no RTCA DO-160 validation data published | Targets 240 V AC rectified rails; lacks documented compliance for airborne or automotive safety-critical use | Choose MAPLAD18KP150AE3 for 150 V systems needing guaranteed 75 A IPP, 243 V clamping, and full regulatory test evidence. |
Compared with SMAJ150A and V275SM3, MAPLAD18KP150AE3 uniquely combines 18 kW pulse rating, AEC-Q101 reliability, RTCA DO-160F Waveform 4 Level 4 certification, and 0.7 °C/W thermal resistance - making it the only option for high-reliability 150 V DC bus protection where single-event robustness and multi-stroke endurance are mandatory.
Availability
MAPLAD18KP150AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive 48 V load-dump protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and certified surge resilience.
Supply support for MAPLAD18KP150AE3 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The PLAD family was engineered specifically for high-energy transient suppression in mission-critical platforms - emphasizing thermal efficiency, multi-stroke endurance, and regulatory compliance over cost-optimized consumer TVS diodes.
FAQ
What is the clamping voltage of MAPLAD18KP150AE3 at its rated peak pulse current?
The MAPLAD18KP150AE3 has a maximum clamping voltage (VC) of 243 V at 75 A peak impulse current (IPP), measured under the 10/1000 μs waveform. This value ensures downstream components see limited overvoltage during surge events while maintaining sufficient margin below typical 28 V or 48 V system insulation ratings. The clamping performance is validated across −55°C to +150°C operating temperatures.
Is MAPLAD18KP150AE3 qualified for automotive applications?
Yes, MAPLAD18KP150AE3 is AEC-Q101 qualified and tested per the standard's stress conditions, including temperature cycling, humidity bias, and surge robustness. It is explicitly rated for automotive load-dump protection in 48 V systems and supports ISO 16750-2 compliance when applied with proper PCB layout and thermal management. Its e3 RoHS plating also meets automotive lead-free assembly requirements.
How does the thermal design of MAPLAD18KP150AE3 differ from standard SMT TVS diodes?
MAPLAD18KP150AE3 achieves a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W - over 30× better than typical SMC/SMA-packaged TVS diodes - by using a metal-base construction where the cathode serves as the primary thermal path. This requires soldering the entire metal bottom to a dedicated thermal pad per Microsemi's specified footprint. Failure to implement this results in severe derating of pulse power capability.
Does MAPLAD18KP150AE3 meet RTCA DO-160 lightning protection standards?
Yes, MAPLAD18KP150AE3 is certified for RTCA DO-160F Section 22 lightning-induced transient testing, specifically Waveform 4 (6.4/69 μs) at Level 4. It is also validated for multi-stroke lightning per the standard's cumulative heating requirements. Documentation confirms compliance for VWM = 150 V devices, with test reports available upon request through Aetrix Electronics.
What is the polarity configuration and pin identification for MAPLAD18KP150AE3?
MAPLAD18KP150AE3 is a unidirectional TVS diode: the anode connects to the top-side metallized terminals, and the cathode is the exposed metal base on the bottom of the package. Polarity is marked on the body per Microsemi's nomenclature - "A" suffix denotes unidirectional, and the cathode side must face the system ground plane during placement. Incorrect orientation prevents surge conduction and risks catastrophic failure.
MAPLAD18KP150AE3 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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 75A
- 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
MAPLAD18KP150AE3 FAQ
1.How can I place an order for MAPLAD18KP150AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP150AE3 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 MAPLAD18KP150AE3 reliable?
The price and inventory of MAPLAD18KP150AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP150AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP150AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP150AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP150AE3?
MAPLAD18KP150AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP150AE3 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 MAPLAD18KP150AE3?
For technical support, including MAPLAD18KP150AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP150AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP150AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP150AE3 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 MAPLAD18KP150AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP150AE3?
All MAPLAD18KP150AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP150AE3, 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 MAPLAD18KP150AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP150AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP150AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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