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Microchip Technology MAPLAD18KP14AE3
- Part No.:
- MAPLAD18KP14AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP14AE3.pdf
- Description:
- TVS DIODE 14VWM 23.2VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,934
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Product details
Overview
MAPLAD18KP14AE3 from Microsemi is a surface-mount unidirectional 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 ≤23.2 V under 776 A peak impulse current, and features a 14 V reverse standoff voltage (VWM) with 15.6–17.2 V breakdown range. It is RoHS-compliant (e3), qualified to AEC-Q101, and meets RTCA DO-160F Level 4 pin injection for aircraft electronics.
For engineers reviewing the MAPLAD18KP14AE3 datasheet, MAPLAD18KP14AE3 pinout, MAPLAD18KP14AE3 application, or MAPLAD18KP14AE3 equivalent, key selection criteria include its 14 V working voltage, 23.2 V max clamping at 776 A, low 0.7 °C/W junction-to-case thermal resistance, MIL-PRF-19500 upscreening capability, and compliance with IEC 61000-4-5 (Class 1–5, 42 Ω source) and RTCA DO-160F Waveform 4 & 5A.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating when transient voltage exceeds its breakdown threshold (15.6–17.2 V). Its low RθJC (0.7 °C/W) enables effective heat dissipation into a heatsink or PCB copper plane, supporting repeated multi-stroke lightning events per RTCA DO-160 Section 22.
It is rated for bidirectional variants (CA suffix) but MAPLAD18KP14AE3 is unidirectional, with cathode on the metal base (bottom side). Standby leakage is ≤10 μA at 14 V, and it achieves <100 ps response time from 0 V to V(BR) min, ensuring fast suppression of ESD, EFT (IEC 61000-4-2/4), and load dump transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without failure under standardized lightning waveform |
| Reverse Standoff Voltage (VWM) | 14 V - maximum continuous DC or peak AC voltage the device blocks during normal operation |
| Breakdown Voltage (V(BR)) | 15.6–17.2 V @ I(BR) - precise conduction onset ensures reliable triggering above system operating voltage |
| Max Clamping Voltage (VC) | 23.2 V @ 776 A - limits downstream voltage stress to safe levels for 12–24 V rail components |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink, critical for repetitive surge duty cycles |
| Standby Current (ID) | ≤10 μA @ 14 V - negligible leakage preserves battery life and signal integrity in always-on systems |
| Response Time | <100 ps - sub-nanosecond activation prevents overshoot damage to high-speed interfaces |
Pinout & Package
MAPLAD18KP14AE3 uses a surface-mount plastic package with metal base cathode termination. The device has two terminals: anode (top metallization) and cathode (exposed metal bottom surface), requiring thermal pad layout per RF01215 Rev B recommended footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional conduction path | Connected to protected line (e.g., 12 V supply rail); conducts only when cathode is more positive than anode by ≥V(BR) |
| Cathode (Metal Base) | Return path and primary thermal interface | Must be soldered to large copper pour or heatsink; serves as both electrical return and thermal conduction path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW Surge Rating | Enables single-device protection against severe lightning-induced transients per RTCA DO-160 Section 22, eliminating need for cascaded TVS stages |
| Low RθJC (0.7 °C/W) | Supports >1000 surge cycles at 0.05% duty factor when mounted per spec, extending service life in avionics power supplies |
| AEC-Q101 Qualified | Validated for automotive under-hood applications including alternator load dump (ISO 7637-2 Pulse 5a/b) and ESD immunity |
| RoHS Compliant (e3) | Meets global environmental regulations without compromising surge performance or thermal reliability |
| MIL-PRF-19500 Upscreening Option | Enables M, MA, MX, or MXL reliability screening for mission-critical aerospace deployments requiring lot traceability and 3σ ID screening |
Applications
| Aircraft Power Distribution Units | Automotive Engine Control Modules |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in flight control computers from lightning-induced surges per RTCA DO-160F Waveform 4 (6.4/69 μs). IC Role / Device Role / Timing Role: Primary clamping TVS placed at board-level input connector to shunt surge current away from DC-DC converters and microcontrollers. Use Value: 23.2 V clamping ensures downstream 28 V-rated components remain within safe operating voltage margin during Level 4 pin injection events. | Use Scenario: Safeguarding 12 V supply rails in engine control units exposed to alternator load dump transients (ISO 7637-2 Pulse 5b). IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground, activated within 100 ps to clamp spikes up to 120 V. Use Value: 18,000 W rating handles full 120 V/350 ms load dump without degradation, maintaining system uptime across 15-year vehicle lifecycle. |
| Industrial Motor Drive Controllers | Railway Signaling Interfaces |
Use Scenario: Shielding gate driver ICs and current sensors in variable-frequency drives from IGBT switching transients and induced RFI. IC Role / Device Role / Timing Role: Localized TVS at power stage inputs to suppress dV/dt-induced coupling and commutation spikes. Use Value: ≤10 μA standby current avoids loading precision current-sense amplifiers, preserving measurement accuracy in closed-loop control. | Use Scenario: Securing 72 V DC signaling lines in train onboard communication networks against EFT bursts (IEC 61000-4-4) and secondary lightning (IEC 61000-4-5, 42 Ω source). IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (though MAPLAD18KP14AE3 is unidirectional, used in polarity-controlled zones) deployed at line interface transformers. Use Value: 14 V VWM aligns with 72 V nominal rail derating (per 5× rule), enabling robust protection without false triggering during normal voltage ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A | 600 W rating, 200 V standoff max, SMC package, RθJC ≈ 12 °C/W | Limited to low-energy ESD/EFT; unsuitable for DO-160 lightning or load dump | Select SMBJ14A only for cost-sensitive consumer-grade 14 V rail protection where surge energy ≤100 J |
| SMCJ14A | 1500 W rating, same SMC package, RθJC ≈ 3.5 °C/W, no AEC-Q101 or DO-160 qualification | Acceptable for industrial IEC 61000-4-5 Class 3, but not certified for aerospace or automotive safety-critical use | Choose SMCJ14A for non-certified 14 V systems needing higher energy handling than SMBJ but lacking flight or road certification requirements |
Compared with SMBJ14A and SMCJ14A, MAPLAD18KP14AE3 provides 12× and 12× higher peak pulse power respectively, certified AEC-Q101 and RTCA DO-160F compliance, and 5× lower thermal resistance-making it the sole option for certified aviation and automotive power rail protection.
Availability
MAPLAD18KP14AE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive powertrain electronics, and industrial motor drive controllers requiring stable component supply across extended product lifecycles and rigorous environmental qualification.
Supply support for MAPLAD18KP14AE3 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 expertise in radiation-hardened ICs, timing devices, and transient protection.
The PLAD family-including MAPLAD18KP14AE3-is engineered specifically for high-power, surface-mount surge suppression in certified airborne and automotive systems, emphasizing thermal robustness, multi-stroke endurance, and regulatory compliance.
FAQ
What is the clamping voltage of MAPLAD18KP14AE3 at its rated peak pulse current?
MAPLAD18KP14AE3 has a maximum clamping voltage (VC) of 23.2 V at 776 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and Table on page 4 of RF01215 Rev B. The low clamping level ensures protected 12–24 V system components remain within safe operating voltage margins during surge events.
Is MAPLAD18KP14AE3 suitable for bidirectional signal line protection?
No, MAPLAD18KP14AE3 is a unidirectional TVS diode, with cathode on the metal base and anode on the top surface. For bidirectional protection, Microsemi offers the MAPLAD18KP14CA variant. Using MAPLAD18KP14AE3 on AC or differential signal lines without polarity control risks forward conduction and failure during negative transients.
Does MAPLAD18KP14AE3 require a heatsink for standard operation?
MAPLAD18KP14AE3 does not require an external heatsink for single-event surge suppression, but its 0.7 °C/W RθJC is optimized for thermal transfer into a PCB copper plane or chassis-mounted metal base. For repetitive surges (>0.05% duty cycle), mounting per RF01215's recommended pad layout (page 7) is mandatory to maintain junction temperature below 150 °C.
What certifications apply to MAPLAD18KP14AE3?
MAPLAD18KP14AE3 is qualified to AEC-Q101 for automotive use and supports MIL-PRF-19500 upscreening (M/MA/MX/MXL levels). It meets RTCA DO-160F Section 22 lightning standards (Level 4 Waveform 4), IEC 61000-4-2/4/5, and is RoHS-compliant (e3). These certifications are documented in RF01215 Rev B and Microsemi's Non-Hermetic Product Portfolio.
How does the e3 suffix in MAPLAD18KP14AE3 affect soldering and reliability?
The e3 suffix indicates RoHS-compliant matte-tin plating, fully compatible with standard SnPb and lead-free reflow profiles (up to 260 °C for 10 s). Per RF01215 Rev B, this plating meets MIL-STD-750 Method 2026 for solderability and shows no degradation in surge lifetime versus non-RoHS variants-ensuring identical 18,000 W pulse performance and thermal reliability in MAPLAD18KP14AE3.
MAPLAD18KP14AE3 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 776A
- 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
MAPLAD18KP14AE3 FAQ
1.How can I place an order for MAPLAD18KP14AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP14AE3 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 MAPLAD18KP14AE3 reliable?
The price and inventory of MAPLAD18KP14AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP14AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP14AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP14AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP14AE3?
MAPLAD18KP14AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP14AE3 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 MAPLAD18KP14AE3?
For technical support, including MAPLAD18KP14AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP14AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP14AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP14AE3 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 MAPLAD18KP14AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP14AE3?
All MAPLAD18KP14AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP14AE3, 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 MAPLAD18KP14AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP14AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP14AE3 Tags
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