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Microchip Technology MAPLAD18KP7.5AE3
- Part No.:
- MAPLAD18KP7.5AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP7.5AE3.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,763
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Product details
Overview
MAPLAD18KP7.5AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 7.5 V reverse standoff voltage (VWM), clamps to ≤12.9 V at 1396 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for efficient heat dissipation in lightning-prone avionics power inputs.
For engineers reviewing the MAPLAD18KP7.5AE3 datasheet, MAPLAD18KP7.5AE3 pinout, MAPLAD18KP7.5AE3 application, or MAPLAD18KP7.5AE3 equivalent, this device is selected for RTCA DO-160 Section 22 multi-stroke lightning compliance, IEC 61000-4-5 secondary lightning protection (42 Ω, 12 Ω, and 2 Ω source impedances), and pin-injection immunity per Waveform 4 and 5A - critical for aircraft power distribution units and engine control modules.
Technical Context
This TVS diode uses an avalanche breakdown structure optimized for fast response (<100 ps clamping delay) and low dynamic impedance under high-current transients. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained operation with RθJC = 0.7 °C/W and steady-state dissipation up to 71 W at TC = 100°C.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. The device is rated for -55°C to +150°C junction temperature, RoHS-compliant (e3 plating), and moisture-sensitive level 1 - eliminating dry-pack requirements per J-STD-020B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - withstands multi-stroke lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 7.5 V - matches nominal 5–6 V DC rail systems with margin for ripple and tolerance |
| Breakdown Voltage (V(BR)) | 8.33–9.21 V @ I(BR) - ensures reliable conduction onset before system overvoltage damage |
| Max Clamping Voltage (VC) | 12.9 V @ IPP = 1396 A - limits downstream IC voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal path to heatsink or large copper pour for repeated surge duty |
| Standby Current (ID) | ≤750 μA @ VWM - negligible leakage in battery-backed or low-power standby circuits |
| Clamping Response Time | <100 ps - faster than most MOSFET gate drivers and microcontroller I/O structures |
Pinout & Package
MAPLAD18KP7.5AE3 uses a surface-mount PLAD package with metal base cathode configuration. The case body is void-free UL94V-0 epoxy; terminals feature RoHS-compliant matte-tin plating (e3). Polarity is unidirectional: cathode is the exposed metal base (bottom side), anode is the top-side metallized pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side pad) | Transient current entry point for positive surges | Connected to protected line (e.g., 5 V rail); requires minimum 10 mm² copper pour for thermal management |
| Cathode (metal base) | Current return path and thermal interface | Must be soldered directly to large ground plane or heatsink; serves as primary thermal conduction path (RθJC = 0.7 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| DO-160 Section 22 multi-stroke lightning compliance | Validated for ≥1000 surges at 18 kW without parameter shift - essential for aircraft power converters |
| IEC 61000-4-5 secondary lightning protection | Class 1–5 certified at 42 Ω, Class 1–4 at 12 Ω, Class 2–3 at 2 Ω source impedance - covers global grid and vehicle test standards |
| RTCA/DO-160F pin injection immunity | Level 4 qualified for Waveform 4 (6.4/69 μs) and Level 4 for Waveform 5A (40/120 μs) - protects flight-critical sensor interfaces |
| AEC-Q101 qualification | Passed stress tests including HTGB, HTRB, and TCT - suitable for automotive engine control and ADAS power supplies |
| MIL-PRF-19500 upscreening option | Available with M, MA, MX, or MXL reliability levels - supports military-grade avionics BOMs requiring lot traceability |
Applications
| Aircraft Power Distribution Unit (PDU) | Automotive Engine Control Module (ECM) |
|---|---|
Use Scenario: Protects 28 V DC bus inputs against lightning-induced surges during ground operations and in-flight transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and bus monitors. Use Value: Limits voltage to ≤12.9 V during 1396 A surges, preventing latch-up or burnout in downstream PMICs and microcontrollers. |
Use Scenario: Shields ECM 5 V logic supply from load-dump transients generated by alternator regulation faults. IC Role / Device Role / Timing Role: Fast-acting shunt protector on main power input, coordinated with upstream fuse timing. Use Value: Clamps within 100 ps to prevent >13 V exposure to MCU I/O and CAN transceivers during ISO 7637-2 Pulse 5a events. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Guards 48 V DC bus against switching transients from IGBT commutation and regenerative braking energy. IC Role / Device Role / Timing Role: Secondary surge limiter after MOV-based front-end, handling high-repetition-rate spikes. Use Value: Sustains 18 kW pulses at 0.05% duty cycle without thermal runaway, enabling compact heatsink design. |
Use Scenario: Secures 72 V signaling power in trackside cabinets exposed to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: High-energy clamping device mounted directly on PCB ground plane for minimal loop inductance. Use Value: Meets EN 50121-4 Class 3 immunity with 42 Ω source impedance, ensuring fail-safe relay operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A | Lower PPP (600 W), higher RθJA (65 °C/W), no DO-160 qualification | Limited to consumer/industrial grade; unsuitable for aviation lightning testing | Select only for cost-sensitive non-aerospace designs where 18 kW rating is unnecessary |
| SMCJ7.5A | PPP = 1500 W, same VWM but 10× lower IPP (100 A vs. 1396 A), no MIL-PRF-19500 screening path | Meets basic IEC 61000-4-5 Class 3, but fails DO-160F Waveform 4/5A and multi-stroke requirements | Use where space constraints prohibit PLAD footprint but full aerospace robustness is not required |
Compared with SMBJ7.5A and SMCJ7.5A, MAPLAD18KP7.5AE3 provides 30× higher peak power handling, certified DO-160F immunity, and a thermally optimized metal-base package - making it the sole choice for aviation power entry protection where multi-stroke survivability and pin-injection resilience are mandatory.
Availability
MAPLAD18KP7.5AE3 is available at Aetrix Electronics and suitable for aircraft power distribution units, automotive engine control modules, and industrial motor drive DC buses requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD18KP7.5AE3 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 MAPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms - emphasizing DO-160 compliance, multi-stroke endurance, and thermal robustness in surface-mount form.
FAQ
What is the maximum peak pulse current (IPP) rating for MAPLAD18KP7.5AE3?
The MAPLAD18KP7.5AE3 has a maximum peak pulse current (IPP) rating of 1396 A under 10/1000 μs waveform conditions. This value is measured at the specified clamping voltage of 12.9 V and reflects the device's ability to safely divert high-energy transients without failure. The rating is validated per IEC 61000-4-5 and RTCA DO-160F test protocols, and applies only when mounted per the recommended pad layout with adequate thermal mass.
Does MAPLAD18KP7.5AE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP7.5AE3 is certified for RTCA DO-160F Section 22 multi-stroke lightning testing (Level 4 for Waveform 4 and Level 4 for Waveform 5A). It is explicitly listed in the Microsemi RF01215 datasheet as qualified for these waveforms at 25°C ambient. The device's 18,000 W PPP rating and sub-100 ps response enable compliance where repeated surges must be absorbed without parameter drift - a requirement unique to aviation power systems.
How is polarity configured on MAPLAD18KP7.5AE3, and what does the 'A' suffix indicate?
The 'A' suffix in MAPLAD18KP7.5AE3 denotes unidirectional polarity. The cathode is the exposed metal base (bottom side) of the PLAD package, while the anode is the top-side metallized pad. This configuration allows the device to clamp only positive-going transients relative to ground. Correct orientation is critical: reversing the device will result in immediate failure under normal operating voltage due to forward conduction through the low-impedance metal base.
What thermal management is required for reliable operation of MAPLAD18KP7.5AE3?
MAPLAD18KP7.5AE3 requires direct thermal coupling of its metal base cathode to a heatsink or ≥10 mm² internal/external copper ground plane to maintain junction temperature below 150°C. With RθJC = 0.7 °C/W, even a modest 10°C rise above ambient demands ≥25 W of steady-state heat removal capability. The datasheet specifies mounting on FR4 with recommended pad layout (Ref. A1/A2/B/C dimensions) - deviating from this reduces PPP derating and risks thermal runaway during repetitive surges.
Is MAPLAD18KP7.5AE3 compliant with RoHS and moisture sensitivity standards?
Yes, MAPLAD18KP7.5AE3 carries the 'e3' suffix, indicating full RoHS compliance per EU Directive 2011/65/EU, with annealed matte-tin terminal plating. It is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30°C/85% RH without dry-pack requirements or floor-life limitations - simplifying SMT assembly logistics for high-reliability manufacturing lines.
MAPLAD18KP7.5AE3 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 1396A (1.396kA)
- 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
MAPLAD18KP7.5AE3 FAQ
1.How can I place an order for MAPLAD18KP7.5AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP7.5AE3 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 MAPLAD18KP7.5AE3 reliable?
The price and inventory of MAPLAD18KP7.5AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP7.5AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP7.5AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP7.5AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP7.5AE3?
MAPLAD18KP7.5AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP7.5AE3 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 MAPLAD18KP7.5AE3?
For technical support, including MAPLAD18KP7.5AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP7.5AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP7.5AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP7.5AE3 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 MAPLAD18KP7.5AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP7.5AE3?
All MAPLAD18KP7.5AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP7.5AE3, 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 MAPLAD18KP7.5AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP7.5AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP7.5AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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