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Microchip Technology MAPLAD18KP180CA
- Part No.:
- MAPLAD18KP180CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP180CA.pdf
- Description:
- TVS DIODE 180VWM 291VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,092
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Product details
Overview
MAPLAD18KP180CA from Microsemi is a bidirectional 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 ≤291 V under 5 A peak impulse current, and features a 180 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (200–221 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP180CA datasheet, MAPLAD18KP180CA pinout, MAPLAD18KP180CA application, or MAPLAD18KP180CA 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 SMT mounting are critical - especially in avionics power distribution units and 24/28 V vehicle electronics.
Technical Context
The MAPLAD18KP180CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its metal-base package enables direct thermal coupling to heatsinks, supporting steady-state dissipation up to 71 W at TC = 100°C and junction temperatures from –55°C to +150°C.
It is rated for bidirectional operation with symmetrical clamping behavior, validated per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and RTCA DO-160F pin injection waveforms. Standby leakage is limited to 10 μA at 180 V, and temperature coefficient of breakdown voltage is 219 mV/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 180 V - maximum continuous DC or peak AC voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 200–221 V @ I(BR) - ensures reliable turn-on margin above system operating voltage |
| Max Clamping Voltage (VC) | 291 V @ IPP = 5 A - limits downstream component stress during surge events |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Leakage Current | 10 μA @ VWM - negligible power loss in standby, critical for battery-backed systems |
| Clamping Response Time | <5 ns - protects sensitive analog and digital circuitry from fast-rising transients |
Pinout & Package
MAPLAD18KP180CA uses a surface-mount PLAD package with two terminals: cathode on the metal base (bottom side) and anode on the top-side metallization. The package is void-free thermosetting epoxy (UL94V-0), with matte-tin plating compatible with leaded and RoHS-compliant soldering processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top-side metallization) | Positive terminal for bidirectional surge path | Connects to protected line; forms symmetrical clamping path with cathode |
| Cathode (Metal base / bottom) | Negative reference terminal | Must be soldered to large copper pour or heatsink for thermal and electrical return |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection at 180 V VWM - required for commercial aircraft avionics |
| MIL-PRF-19500 upscreening option | Supports high-reliability screening (M, MA, MX, MXL levels) for mission-critical aerospace deployments |
| IEC 61000-4-5 Class 1–5 certification | Meets secondary lightning protection across all severity classes with 42 Ω, 12 Ω, and 2 Ω source impedances |
| Moisture Sensitivity Level 1 | No dry-pack or bake-out required prior to reflow - simplifies manufacturing and reduces cost |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protection of 28 V DC bus in flight control computers and sensor interface modules against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy to chassis ground. Use Value: Prevents latch-up or burnout in downstream DC/DC converters and FPGAs during multi-stroke lightning events. |
Use Scenario: Guarding engine control unit (ECU) inputs against 12 V load dump spikes exceeding 40 V for >400 ms. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery feed line, operating in parallel with upstream fuse and relay. Use Value: Limits voltage to ≤291 V during 18 kW surges, preserving ISO 16750-2 compliance without derating microcontrollers. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Safeguarding gate drivers and current sensors on 300–400 V DC link rails exposed to switching transients and EFT noise. IC Role / Device Role / Timing Role: High-power TVS mounted adjacent to IGBT module terminals to absorb commutation spikes. Use Value: Reduces need for snubber networks by clamping transients within 5 ns, improving efficiency and layout density. |
Use Scenario: Protecting 72 V signaling lines in European railway interlocking systems against induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Bidirectional clamp installed at field cable entry point into wayside electronic units. Use Value: Meets EN 50121-4 immunity requirements while maintaining <10 μA leakage to avoid false tripping of current-sensing relays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180CA | Lower PPP rating (600 W), smaller SMB package, RθJC ≈ 25 °C/W | Suitable for board-level ESD/EFT only; not rated for DO-160 or IEC 61000-4-5 Class 4/5 | Select when cost and size constrain design, and surge energy is below 1 kA (8/20 μs) |
| SMCJ180CA | 1500 W PPP, SMC package, RθJC ≈ 3.5 °C/W, no MIL-PRF-19500 screening option | Valid for IEC 61000-4-5 Class 3 but lacks DO-160F Waveform 4 validation and thermal performance for sustained duty | Choose for industrial automation where aerospace qualification is unnecessary and thermal budget allows |
Compared with SMBJ180CA and SMCJ180CA, MAPLAD18KP180CA provides 30× higher peak power, 3.5× lower thermal resistance, and formal DO-160F/IEC 61000-4-5 certification - making it the only option for certified airborne equipment and high-duty-cycle automotive load dump.
Availability
MAPLAD18KP180CA is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, industrial motor drive DC links, and railway signaling interfaces requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP180CA 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) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The MAPLAD18KP180CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning protection in safety-critical platforms where thermal robustness, multi-stroke endurance, and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD18KP180CA at its rated peak pulse current?
The MAPLAD18KP180CA has a maximum clamping voltage (VC) of 291 V at a peak pulse current (IPP) of 5 A under 10/1000 μs waveform conditions. This value is measured across the device terminals when subjected to standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events.
Is MAPLAD18KP180CA compliant with RoHS and REACH regulations?
Yes, MAPLAD18KP180CA is RoHS compliant (designated by the "e3" suffix in its full nomenclature) and conforms to REACH SVHC requirements. Its matte-tin plating and void-free UL94V-0 epoxy body meet both directives without exemptions, supporting environmentally regulated aerospace and automotive supply chains.
Does MAPLAD18KP180CA require heatsinking for continuous operation?
MAPLAD18KP180CA does not require external heatsinking for single-event surge suppression, but its 71 W steady-state power rating at TC = 100°C assumes direct thermal coupling to ≥2 in² of 2-oz copper. For repeated surges or elevated ambient temperatures, PCB copper area or mechanical heatsinking is necessary to maintain junction temperature below +150°C.
Can MAPLAD18KP180CA be used in unidirectional configurations?
No - MAPLAD18KP180CA is strictly bidirectional, as indicated by the "CA" suffix. Unidirectional variants (e.g., MAPLAD18KP180A) exist in the same PLAD family but differ in internal construction and polarity marking; substituting them would compromise protection on AC or floating DC lines.
What is the moisture sensitivity level (MSL) for MAPLAD18KP180CA?
MAPLAD18KP180CA is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry-packaging or baking prior to reflow soldering. This eliminates handling overhead and supports high-throughput SMT assembly without moisture-related defects.
MAPLAD18KP180CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 180V
- Voltage - Breakdown (Min):
- 200V
- Voltage - Clamping (Max) @ Ipp:
- 291V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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
MAPLAD18KP180CA FAQ
1.How can I place an order for MAPLAD18KP180CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP180CA 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 MAPLAD18KP180CA reliable?
The price and inventory of MAPLAD18KP180CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP180CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP180CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP180CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP180CA?
MAPLAD18KP180CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP180CA 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 MAPLAD18KP180CA?
For technical support, including MAPLAD18KP180CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP180CA requirements.
6.How does Aetrix verify that MAPLAD18KP180CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP180CA 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 MAPLAD18KP180CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP180CA?
All MAPLAD18KP180CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP180CA, 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 MAPLAD18KP180CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP180CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP180CA Tags
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