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Microchip Technology MAPLAD18KP160A
- Part No.:
- MAPLAD18KP160A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP160A.pdf
- Description:
- TVS DIODE 160VWM 259VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,457
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Product details
Overview
MAPLAD18KP160A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤259 V under 1000 A impulse, and features a 160 V reverse standoff voltage (VWM), 178–197 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance. 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.
For engineers reviewing the MAPLAD18KP160A datasheet, MAPLAD18KP160A pinout, MAPLAD18KP160A application, or MAPLAD18KP160A equivalent, key selection criteria include its 160 V VWM rating, 259 V max clamping voltage at 1000 A, low RθJC of 0.7 °C/W, RoHS-compliant e3 plating, and qualification for aircraft load dump and automotive transients per AEC-Q101 and DO-160.
Technical Context
The MAPLAD18KP160A operates as a silicon avalanche diode-based unidirectional TVS, with cathode on the metal base (package bottom) for optimal thermal conduction. Its design targets multi-stroke lightning events per RTCA DO-160 Section 22 and repetitive switching transients in high-reliability DC bus lines.
It supports secondary lightning protection per IEC 61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances across Classes 1–5, and provides ESD/EFT immunity per IEC 61000-4-2/4-4. Standby current ID is ≤10 μA at 160 V, and temperature coefficient αV(BR) is +195 mV/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without failure under standard lightning waveform |
| Reverse Standoff Voltage (VWM) | 160 V - maximum continuous DC or peak AC voltage the device blocks without clamping |
| Clamping Voltage (VC) | ≤259 V @ IPP = 1000 A - limits downstream circuit voltage during worst-case surge |
| Breakdown Voltage (V(BR)) | 178–197 V @ I(BR) - precise avalanche initiation range ensures predictable turn-on margin |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink or PCB copper, critical for repeated surge duty |
| Standby Current (ID) | ≤10 μA @ 160 V - negligible leakage preserves system efficiency in always-on 160 V rail applications |
| Temperature Coefficient (αV(BR)) | +195 mV/°C - quantifies V(BR) drift with junction temperature for thermal design margining |
Pinout & Package
MAPLAD18KP160A uses a surface-mount plastic package with void-free UL94V-0 epoxy body and tin-lead or RoHS-compliant matte-tin plating. The metal base serves as the cathode terminal and primary thermal path. Recommended pad layout per RF01215 Rev B specifies 12.32–12.57 mm × 10.54–10.80 mm footprint with 5.08–5.33 mm center conductor width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface - must be soldered to large copper pour or heatsink |
| Top Surface Anode Pad | Anode | Signal-side connection point - routed with minimal trace inductance to protect sensitive inputs |
Key Features
| Feature | Design Value |
|---|---|
| Aerospace-grade surge rating | Qualified to RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) - validated for aircraft avionics pin injection immunity |
| Multi-impedance lightning compliance | Meets IEC 61000-4-5 Class 1–5 with 42 Ω, 12 Ω, and 2 Ω source impedances - covers diverse system source impedances |
| High-reliability construction | Wafer and assembly lot traceability + 3σ screening on ID - ensures consistent parametric performance across production lots |
| Low-profile thermal design | RθJC = 0.7 °C/W - enables compact placement on space-constrained boards while maintaining thermal headroom |
| Automotive qualification | AEC-Q101 stress-tested - certified for under-hood and powertrain applications requiring robust transient immunity |
Applications
| Aircraft Power Distribution Units | Automotive 48 V DC-DC Converters |
|---|---|
Use Scenario: Protecting 160 V nominal DC bus in airborne auxiliary power units against lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus input to clamp transients before they reach DC-DC controllers and isolation transformers. Use Value: 259 V clamping ensures downstream 300 V-rated MOSFETs and gate drivers remain within safe operating area during multi-stroke events. | Use Scenario: Safeguarding 48 V to 160 V step-up converter outputs in electric commercial vehicles exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on high-side output rail, coordinated with upstream fuse and current sensing. Use Value: 18 kW PPP rating handles 12 V battery dump energy scaled to 48 V architecture without degradation over 10,000+ cycles. |
| Industrial Motor Drive DC Links | Railway Traction Control Interfaces |
Use Scenario: Shielding IGBT gate drivers and current sensors on 160 V DC link of HVAC compressors and pump inverters from IGBT switching spikes. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly at driver IC power pins to suppress <100 ps rise-time transients. Use Value: Sub-100 ps response time and 0.7 °C/W RθJC prevent thermal runaway during repetitive 10 kHz switching noise bursts. | Use Scenario: Securing CAN and Ethernet PHY interfaces on 160 V-powered train control modules against traction system ground bounce and arc flash coupling. IC Role / Device Role / Timing Role: Secondary protection stage after common-mode chokes, shunting differential-mode surges to chassis ground. Use Value: Bidirectional variants (e.g., MAPLAD18KP160CA) support this use; unidirectional MAPLAD18KP160A used where polarity is strictly controlled. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ160A | 600 W PPP rating, 200 V VWM, SMB package, RθJC ≈ 35 °C/W | Lower energy handling; suitable only for single-stroke, non-aviation applications | Select SMBJ160A only when surge energy is <1% of MAPLAD18KP160A's capability and thermal mass is limited |
| SMCJ160A | 1500 W PPP rating, same VWM, SMC package, RθJC ≈ 15 °C/W | Mid-tier energy rating; lacks DO-160F and AEC-Q101 qualification | Choose SMCJ160A for cost-sensitive industrial controls where multi-stroke immunity is not required |
Compared with SMBJ160A and SMCJ160A, MAPLAD18KP160A delivers 30× and 12× higher peak pulse power respectively, with certified aerospace and automotive qualifications, lower thermal resistance, and guaranteed multi-stroke endurance - making it the sole option for mission-critical 160 V rail protection.
Availability
MAPLAD18KP160A is available at Aetrix Electronics and suitable for aircraft power distribution, automotive 48 V architectures, industrial motor drives, and railway control systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP160A 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, communications, and industrial markets, with leadership in radiation-hardened ICs, timing devices, and power protection.
The PLAD family was developed specifically for high-energy, surface-mount transient suppression in safety-critical platforms where DO-160, AEC-Q101, and IEC 61000-4-5 compliance are mandatory - emphasizing thermal robustness, lot traceability, and multi-stroke endurance.
FAQ
What is the clamping voltage of MAPLAD18KP160A at its rated peak pulse current?
The MAPLAD18KP160A has a maximum clamping voltage (VC) of 259 V at 1000 A peak pulse current (IPP) under the 10/1000 μs waveform. This value is measured per Figure 3 in RF01215 Rev B and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The MAPLAD18KP160A maintains this clamping performance across its qualified temperature range of –55°C to +150°C.
Is MAPLAD18KP160A qualified for automotive applications?
Yes, MAPLAD18KP160A is tested and qualified to AEC-Q101 standards for discrete semiconductors, covering stress tests including HTGB, HTRB, and surge. Its construction - wafer lot traceability, 3σ standby current screening, and moisture sensitivity level 1 - meets automotive reliability requirements. The MAPLAD18KP160A is deployed in 48 V DC-DC converters and battery management systems where load dump and jump-start transients occur.
How does the thermal performance of MAPLAD18KP160A compare to standard SMC TVS diodes?
MAPLAD18KP160A achieves a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, significantly lower than typical SMC-package TVS diodes (~15 °C/W). This is enabled by its metal-base cathode design and optimized internal die attach, allowing >95% of surge heat to conduct directly into the PCB copper or heatsink. For the same 1000 A surge, MAPLAD18KP160A's junction temperature rise is under 700°C versus >15,000°C in an SMC device - preventing thermal runaway during repetitive events.
Does MAPLAD18KP160A meet RTCA DO-160 lightning protection requirements?
Yes, MAPLAD18KP160A is explicitly rated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 up to 130 V variants. For MAPLAD18KP160A, Level 4 compliance is confirmed per MicroNote 132 derating guidance. Its 18 kW PPP rating and sub-100 ps response ensure robust multi-stroke lightning protection in aircraft power distribution units and flight control electronics.
What is the polarity configuration and mounting orientation of MAPLAD18KP160A?
MAPLAD18KP160A is a unidirectional TVS with cathode on the metal base (bottom surface) and anode on the top metallized pad. Correct orientation requires the metal base to be soldered to a grounded or low-impedance return plane, while the top pad connects to the line being protected. Mounting per the recommended pad layout in RF01215 Rev B ensures optimal thermal conduction and mechanical reliability - reversing polarity will cause catastrophic failure under surge conditions. The MAPLAD18KP160A marking appears on the top surface.
MAPLAD18KP160A 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):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 70A
- 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
MAPLAD18KP160A FAQ
1.How can I place an order for MAPLAD18KP160A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP160A 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 MAPLAD18KP160A reliable?
The price and inventory of MAPLAD18KP160A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP160A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP160A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP160A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP160A?
MAPLAD18KP160A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP160A 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 MAPLAD18KP160A?
For technical support, including MAPLAD18KP160A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP160A requirements.
6.How does Aetrix verify that MAPLAD18KP160A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP160A 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 MAPLAD18KP160A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP160A?
All MAPLAD18KP160A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP160A, 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 MAPLAD18KP160A part is unused and in its original packaging.
Return procedure for MAPLAD18KP160A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP160A Tags
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