My Inquiry
My Account
Microchip Technology MAPLAD18KP22AE3
- Part No.:
- MAPLAD18KP22AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP22AE3.pdf
- Description:
- TVS DIODE 22VWM 35.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,585
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP22AE3 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 ≤35.5 V under 508 A peak impulse current, and features a 22 V reverse standoff voltage (VWM) with 24.4–26.9 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 pin injection requirements.
For engineers reviewing the MAPLAD18KP22AE3 datasheet, MAPLAD18KP22AE3 pinout, MAPLAD18KP22AE3 application, or MAPLAD18KP22AE3 equivalent, key selection criteria include its 22 V working voltage, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, IEC 61000-4-5 secondary lightning protection capability, and suitability for multi-stroke lightning environments per DO-160 Section 22.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 24.4–26.9 V breakdown threshold to divert transients away from downstream components. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained energy handling under repetitive surges at ≤0.05% duty factor.
It is characterized for operation across –55°C to +150°C junction temperature, with standby leakage <10 μA at 22 V, and exhibits a +5.0 mV/°C temperature coefficient of breakdown voltage - enabling predictable derating in elevated ambient conditions per Figure 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 22 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 24.4–26.9 V @ I(BR) - precise turn-on threshold ensures reliable overvoltage detection |
| Max Clamping Voltage (VC) | 35.5 V @ 508 A - limits downstream voltage stress during worst-case transients |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Leakage Current | <10 μA @ 22 V - negligible power loss in normal operation |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow |
Pinout & Package
The MAPLAD18KP22AE3 uses a surface-mount plastic package with metal base cathode termination. The cathode is the exposed metal underside of the device body; the anode is the top-side metallized pad. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended FR4 pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Metal Base) | Low-impedance current return path during clamping | Direct thermal interface to PCB ground plane or heatsink; must be soldered to ≥100 mm² copper area |
| Anode (Top Pad) | Transient current entry point | Connected to protected line (e.g., 24 V rail); requires short, low-inductance trace to minimize overshoot |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection transients at 25°C - meets aircraft avionics immunity requirements |
| AEC-Q101 qualification | Stress-tested for automotive under-hood reliability including temperature cycling, HTRB, and surge endurance |
| RoHS-compliant e3 plating | Matte-tin terminal finish compatible with lead-free reflow profiles up to 260°C for 10 s |
| IEC 61000-4-5 secondary lightning protection | Rated for Class 1–5 testing with 42 Ω source impedance - supports system-level surge immunity certification |
| Void-free UL94V-0 epoxy case | Flame-retardant encapsulation meeting aerospace flammability and outgassing standards |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power bus in flight control computers subjected to DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus input to clamp induced surges before they reach DC/DC converters and FPGAs. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or gate oxide damage in downstream silicon rated for 40 V absolute max. | Use Scenario: 12 V/24 V battery-fed ECU inputs exposed to ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary clamping device on main power rail, absorbing >18 kW energy within 1 ms. Use Value: Eliminates need for series resistors or active crowbar circuits, reducing BOM count and board space while maintaining <100 ps response time. |
| Industrial Motor Drive Control | Railway Signaling Interface |
Use Scenario: PLC I/O modules interfacing with 24 V solenoid drivers subject to inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Parallel-connected TVS on each output channel to suppress switching transients and IEC 61000-4-4 EFT events. Use Value: Withstands repeated 500 A surges at 0.05% duty cycle, ensuring long-term reliability without parameter drift or degradation. | Use Scenario: Trackside signal conditioning circuits powered from 72 V DC supply, requiring EN 50121-3-2 compliance. IC Role / Device Role / Timing Role: Secondary protection stage after front-end MOVs, handling residual fast-rising transients. Use Value: 22 V VWM matches nominal rail voltage; 35.5 V clamping ensures safe margin below 40 V logic supply rails in signaling ASICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | 600 W PPP rating, 300 A IPP, SMC package - 30× lower power handling than MAPLAD18KP22AE3 | Suitable only for consumer-grade IEC 61000-4-5 Level 3; not certified for DO-160 or AEC-Q101 | Select when cost and board space constrain design, and surge energy is limited to <100 J. |
| SMCJ22A | 1500 W PPP, 65.5 V VC @ 21.5 A, same SMC package - lacks DO-160 qualification and metal-base thermal path | Acceptable for industrial automation where RTCA/DO-160 compliance is not required | Choose if AEC-Q101 or aerospace qualification is unnecessary and thermal dissipation is managed via airflow. |
Compared with SMBJ22A and SMCJ22A, MAPLAD18KP22AE3 provides 30× higher peak power capacity, certified aerospace-grade transient immunity, and a dedicated metal-base thermal interface - making it the only option for mission-critical 22 V rail protection in avionics and high-reliability automotive ECUs.
Availability
MAPLAD18KP22AE3 is available at Aetrix Electronics and suitable for avionics power distribution, automotive load dump protection, and industrial motor drive control requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP22AE3 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 solutions, and power protection devices.
The MAPLAD18KP22AE3 belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical systems.
FAQ
What is the clamping voltage of MAPLAD18KP22AE3 at its rated peak pulse current?
The MAPLAD18KP22AE3 has a maximum clamping voltage (VC) of 35.5 V at 508 A peak pulse current under 10/1000 μs waveform conditions. This value is guaranteed per the electrical characteristics table in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance remains stable across –55°C to +150°C operating junction temperature.
Is MAPLAD18KP22AE3 qualified for automotive applications?
Yes, MAPLAD18KP22AE3 is explicitly qualified to AEC-Q101 for automotive use. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - all documented in RF01215 Rev B. Its 22 V VWM and 35.5 V clamping make it suitable for 24 V system load dump protection, and its metal-base thermal path supports under-hood thermal management requirements.
Does MAPLAD18KP22AE3 meet RTCA DO-160 lightning protection standards?
Yes, MAPLAD18KP22AE3 is validated for RTCA DO-160F Section 22 multi-stroke lightning testing and Waveform 4 (6.4/69 μs) pin injection at Level 4. Its 18,000 W PPP rating and low clamping voltage ensure compliance with aircraft-level transient immunity requirements. The device is also rated for secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance across Classes 1–5.
What is the thermal resistance and recommended mounting for MAPLAD18KP22AE3?
MAPLAD18KP22AE3 has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W. To achieve this rating, the metal base (cathode) must be soldered directly to a minimum 100 mm² copper area on FR4 PCB, per the pad layout in RF01215 Rev B. This thermal interface is essential for dissipating cumulative heating during repetitive surges and maintaining reliability under 0.05% duty factor operation.
What does the "E3" suffix indicate in MAPLAD18KP22AE3?
The "E3" suffix in MAPLAD18KP22AE3 denotes RoHS-compliant matte-tin plating on terminals, qualified per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity. This finish supports lead-free reflow soldering up to 260°C for 10 seconds and eliminates post-soldering cleaning requirements. The "E3" marking is laser-etched on the device body and confirms conformance to EU RoHS Directive 2011/65/EU.
MAPLAD18KP22AE3 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 508A
- 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
MAPLAD18KP22AE3 FAQ
1.How can I place an order for MAPLAD18KP22AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP22AE3 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 MAPLAD18KP22AE3 reliable?
The price and inventory of MAPLAD18KP22AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP22AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP22AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP22AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP22AE3?
MAPLAD18KP22AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP22AE3 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 MAPLAD18KP22AE3?
For technical support, including MAPLAD18KP22AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP22AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP22AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP22AE3 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 MAPLAD18KP22AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP22AE3?
All MAPLAD18KP22AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP22AE3, 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 MAPLAD18KP22AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP22AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP22AE3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
