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Microchip Technology MAPLAD18KP9.0A
- Part No.:
- MAPLAD18KP9.0A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP9.0A.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,801
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Product details
Overview
MAPLAD18KP9.0A 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, features a 9.0 V reverse standoff voltage (VWM), clamps to ≤15.4 V at 1169 A peak impulse current, and operates across –55°C to +150°C junction temperature. 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 MAPLAD18KP9.0A datasheet, MAPLAD18KP9.0A pinout, MAPLAD18KP9.0A application, or MAPLAD18KP9.0A equivalent, key selection criteria include its 9.0 V VWM rating, 15.4 V max clamping voltage at 1169 A, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification for aircraft lightning protection per DO-160 Section 22.
Technical Context
The MAPLAD18KP9.0A employs an avalanche diode structure optimized for multi-stroke lightning transients, with thermal design enabling sustained energy dissipation via low RθJC (0.7 °C/W) and metal-base cathode mounting. Its 10/1000 μs waveform response ensures compliance with RTCA DO-160F Waveform 4 (6.4/69 μs) and IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances).
It supports both unidirectional operation (cathode on metal base) and bidirectional variants (CA suffix), with polarity marking defined by package orientation. Standby current ID is ≤60 μA at 9.0 V VWM, and breakdown voltage V(BR) is specified at 10.0–11.1 V under 5 mA test current - critical for precise overvoltage threshold setting in sensitive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous DC or peak AC voltage the device blocks without clamping; matches 8–9 V nominal supply rails. |
| V(BR) min/max | 10.0–11.1 V @ 5 mA - defines precise avalanche initiation window for predictable turn-on behavior. |
| VC @ IPP | ≤15.4 V @ 1169 A - limits downstream voltage stress during 10/1000 μs surges to safe levels for 12 V systems. |
| PPP | 18,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced transients per DO-160. |
| RθJC | 0.7 °C/W - allows efficient heat transfer to heatsink or PCB copper, supporting high-reliability operation at elevated ambient temperatures. |
| ID @ VWM | ≤60 μA - ensures negligible leakage in standby, preserving battery life and signal integrity in always-on circuits. |
| Junction Temp | –55°C to +150°C - certified for extended temperature operation in engine bays, avionics bays, and industrial control enclosures. |
Pinout & Package
MAPLAD18KP9.0A uses a surface-mount plastic package with metal base cathode termination. The device has two terminals: anode (top-side metallization) and cathode (exposed metal base). Mounting requires thermal pad layout per RF01215 Rev B (page 7) to maintain RθJC = 0.7 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line (e.g., 12 V rail); conducts during reverse-biased surge events. |
| Cathode | Negative reference / heat sink interface | Exposed metal base - must be soldered to large copper pour or heatsink for thermal management and EMI grounding. |
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 pin-injection immunity. |
| Multi-source impedance compliance | Meets IEC 61000-4-5 Class 1–5 with 42 Ω, 12 Ω, and 2 Ω source impedances - covers diverse system-level test configurations. |
| Low-profile SMT construction | 0.470″ × 0.230″ × 0.100″ (11.94 × 5.85 × 2.44 mm) footprint - enables compact placement near connectors or power entry points. |
| Traceable high-reliability manufacturing | Wafer and assembly lot traceability + 3σ screening on ID - required for aerospace and defense BOM control. |
| RoHS-compliant plating | e3 matte-tin terminations - compatible with lead-free reflow profiles and MIL-STD-750 solderability testing. |
Applications
| Avionics Power Input Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight control computers and navigation radios from lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient clamp placed directly at connector entry, absorbing multi-stroke surges before they reach DC-DC converters. Use Value: Enables single-device compliance with DO-160F Waveform 4 Level 4 without external series impedance or cascaded stages. | Use Scenario: Safeguarding engine control unit (ECU) power supplies during alternator load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Fast-response shunt protector mounted at ECU main power input, clamping 12 V rail to ≤15.4 V during 100 ms surges. Use Value: Prevents latch-up or damage to 12 V-rated microcontrollers and CAN transceivers during 120 V, 400 ms load dump transients. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding 24–48 V DC bus lines in variable-frequency drives from switching-induced transients and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS across bus rails, activated within <100 ps to limit voltage overshoot during IGBT turn-off. Use Value: Reduces need for snubber networks and extends electrolytic capacitor lifetime by limiting peak bus voltage to <1.3× nominal. | Use Scenario: Securing 72 V signaling lines in train control systems against EFT bursts (IEC 61000-4-4) and lightning coupling (IEC 61000-4-5). IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD18KP9.0CA) used on differential signaling pairs to suppress common-mode surges. Use Value: Maintains signal integrity in EN 50121-3-2 compliant systems while surviving repeated 4 kV EFT and 10 kV lightning surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | 600 W PPP rating, SMA package, RθJA = 40 °C/W, VWM = 9.0 V, VC = 14.4 V @ 32.9 A | Lower energy handling; suitable only for board-level ESD/EFT, not lightning or load dump | Select SMAJ9.0A only for cost-sensitive consumer electronics where peak surge energy is <100 mJ. |
| SMCJ9.0A | 1500 W PPP rating, SMC package, RθJA = 25 °C/W, VWM = 9.0 V, VC = 14.4 V @ 104 A | Lacks DO-160/IEC 61000-4-5 certification; no multi-stroke validation or lot traceability | Choose SMCJ9.0A for industrial automation where full aerospace qualification is unnecessary but higher energy than SMAJ is required. |
Compared with SMAJ9.0A and SMCJ9.0A, MAPLAD18KP9.0A provides 12× and 12× higher peak pulse power respectively, certified thermal performance (RθJC = 0.7 °C/W), and documented compliance with RTCA DO-160F and IEC 61000-4-5 - making it the only option for certified aircraft and high-reliability automotive power protection.
Availability
MAPLAD18KP9.0A is available at Aetrix Electronics and suitable for avionics power input protection, automotive load dump suppression, and industrial motor drive DC bus protection requiring stable component supply and long-term lifecycle support.
Supply support for MAPLAD18KP9.0A 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 emphasis on radiation-hardened ICs, timing devices, and power protection components.
The PLAD family was engineered specifically for high-energy transient suppression in safety-critical platforms, combining ultra-low thermal resistance, multi-stroke surge endurance, and full compliance with aviation and automotive EMC standards.
FAQ
What is the clamping voltage of MAPLAD18KP9.0A at its rated peak pulse current?
The MAPLAD18KP9.0A has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak impulse current of 1169 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and ensures downstream circuitry remains within safe operating voltage limits during severe transients. The MAPLAD18KP9.0A maintains this clamping performance across its full operating temperature range.
Is MAPLAD18KP9.0A qualified for automotive applications per AEC-Q101?
Yes, MAPLAD18KP9.0A is tested and qualified in accordance with AEC-Q101 requirements for discrete semiconductors. The device undergoes stress testing including HTGB, HTRB, and temperature cycling to ensure reliability in automotive under-hood environments. Its –55°C to +150°C operating range and 3σ lot norm screening on standby current further support its use in engine control units and ADAS power systems.
Does MAPLAD18KP9.0A meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP9.0A is explicitly listed in RF01215 Rev B for RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 compliance at 25°C. It is also effective for meeting DO-160 Section 22 multi-stroke lightning standards due to its 18,000 W peak pulse power rating and thermal design. The MAPLAD18KP9.0A's low RθJC enables repeated surge absorption without thermal runaway.
What is the thermal resistance from junction to case for MAPLAD18KP9.0A?
The junction-to-case thermal resistance (RθJC) of MAPLAD18KP9.0A is 0.7 °C/W, measured with the device mounted on a recommended FR4 pad layout per RF01215 Rev B. This low value is achieved via direct metal-base cathode contact to heatsink or PCB copper, enabling efficient heat extraction during high-energy transients. Proper thermal pad implementation is essential to maintain this RθJC in actual designs.
How does the polarity configuration work on MAPLAD18KP9.0A?
MAPLAD18KP9.0A is a unidirectional TVS diode with the cathode located on the exposed metal base (bottom side) and the anode on the top metallization. Polarity is marked by orientation: the cathode must be connected to the system ground or lowest potential reference plane. This configuration ensures fast, low-impedance clamping during positive-going transients on the anode side - a critical requirement for protecting 12 V and 28 V power rails.
MAPLAD18KP9.0A 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MAPLAD18KP9.0A FAQ
1.How can I place an order for MAPLAD18KP9.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP9.0A 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 MAPLAD18KP9.0A reliable?
The price and inventory of MAPLAD18KP9.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP9.0A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP9.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP9.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP9.0A?
MAPLAD18KP9.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP9.0A 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 MAPLAD18KP9.0A?
For technical support, including MAPLAD18KP9.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP9.0A requirements.
6.How does Aetrix verify that MAPLAD18KP9.0A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP9.0A 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 MAPLAD18KP9.0A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP9.0A?
All MAPLAD18KP9.0A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP9.0A, 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 MAPLAD18KP9.0A part is unused and in its original packaging.
Return procedure for MAPLAD18KP9.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP9.0A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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