My Inquiry
My Account
Microchip Technology MAPLAD18KP54A
- Part No.:
- MAPLAD18KP54A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP54A.pdf
- Description:
- TVS DIODE 54VWM 87.1VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,161
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP54A 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, clamps at ≤87.1 V under 100 A impulse, and features a 54 V reverse standoff voltage (VWM) with 60.0–66.3 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for aircraft systems.
For engineers reviewing the MAPLAD18KP54A datasheet, MAPLAD18KP54A pinout, MAPLAD18KP54A application, or MAPLAD18KP54A equivalent, key selection criteria include its 54 V working voltage, sub-100 ns response time, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant e3 plating, and suitability for lightning-level secondary protection per IEC 61000-4-5 with 42 Ω source impedance.
Technical Context
The MAPLAD18KP54A operates as a silicon avalanche diode-based TVS, leveraging controlled avalanche breakdown to divert high-current transients away from sensitive circuitry. Its unidirectional polarity and cathode-on-base construction enable direct mounting to heatsinks for optimal thermal management.
It is rated for multi-stroke lightning compliance per RTCA DO-160 Section 22 and supports secondary lightning protection across Class 1–5 per IEC 61000-4-5 when used with 42 Ω source impedance. Standby leakage is limited to 10 μA at 54 V, and clamping performance is specified at IPP = 207 A with VC ≤ 87.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables robust protection against lightning-induced surges without thermal runaway |
| Reverse Standoff Voltage (VWM) | 54 V - matches nominal 48 V DC bus systems while allowing margin above operating peak voltage |
| Breakdown Voltage (V(BR)) | 60.0–66.3 V @ I(BR) - ensures reliable conduction onset before downstream component damage thresholds |
| Max Clamping Voltage (VC) | ≤87.1 V @ IPP = 207 A - limits protected circuit voltage stress during worst-case surge events |
| Thermal Resistance (RθJC) | 0.7 °C/W - allows efficient heat transfer to PCB copper or external heatsink, critical for repeated surge duty |
| Standby Current (ID) | ≤10 μA @ VWM - minimizes quiescent power loss in always-on systems such as avionics monitoring circuits |
| Response Time | <100 ps - provides near-instantaneous clamping to protect fast-edge digital interfaces and analog sensors |
Pinout & Package
MAPLAD18KP54A uses a low-profile, void-free thermosetting epoxy surface-mount package (PLAD) with metal base cathode termination. The device has two terminals: anode (top metallization) and cathode (exposed metal base), enabling direct thermal coupling to PCB copper pour or heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line; conducts surge current toward cathode during overvoltage event |
| Cathode | Ground reference / heat sink interface | Exposed metal base serves as both electrical return path and primary thermal conduction surface |
Key Features
| Feature | Design Value |
|---|---|
| Aerospace-grade surge rating | Qualified to RTCA DO-160F Waveform 4 (Level 4) and Section 22 multi-stroke lightning - validated for flight-critical subsystems |
| High-reliability traceability | Wafer and assembly lot traceability with 3σ screening on standby current - supports MIL-PRF-19500 upscreening options |
| Low thermal resistance | RθJC = 0.7 °C/W - enables >10× higher sustained surge repetition rate vs. standard SMC packages under identical PCB layout |
| RoHS-compliant plating | e3 matte-tin terminations - ensures compatibility with lead-free reflow profiles and long-term solder joint reliability |
| IEC 61000-4-5 compliance | Secondary lightning protection Class 1–5 with 42 Ω source - certified for use in ground support equipment and airborne power distribution units |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power bus in commercial aircraft auxiliary systems exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed at PDU input to clamp surges before they reach DC-DC converters and flight control electronics. Use Value: Enables compliance with DO-160F Level 4 pin injection and multi-stroke lightning testing without derating or parallel devices. | Use Scenario: 12 V/24 V battery-fed ECU power rail subjected to ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at connector entry point to absorb 18 kW energy spikes within 100 ps. Use Value: Prevents latch-up and gate oxide rupture in MCU power supplies by limiting clamped voltage to ≤87.1 V at 207 A. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 48 V DC link in variable-frequency drives where IGBT switching induces repetitive 1–5 kHz voltage spikes. IC Role / Device Role / Timing Role: Secondary surge protector downstream of bulk capacitance, absorbing residual transients that bypass primary MOVs. Use Value: Maintains <10 μA leakage at 54 V standoff, eliminating cumulative heating in sealed enclosures with no forced airflow. | Use Scenario: Trackside signaling controller interfacing with 75 Ω coaxial data lines subject to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD18KP54CA) used for differential pair protection; unidirectional MAPLAD18KP54A applied to power rail conditioning. Use Value: Achieves IEC 61000-4-5 Class 4 immunity with 42 Ω source impedance - verified for EN 50121-4 compliance in rolling stock electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54A | Lower PPP (600 W), SMA package, RθJC ≈ 40 °C/W | Not suitable for DO-160F multi-stroke or IEC 61000-4-5 Class 4+ testing | Select only for cost-sensitive consumer-grade 24 V systems with single-event surge exposure |
| SMCJ54A | PPP = 1500 W, SMC package, RθJC ≈ 12 °C/W, no AEC-Q101 or DO-160 qualification | Lacks aerospace traceability and multi-stroke validation; limited to industrial non-safety-critical use | Acceptable for non-certified 48 V telecom power supplies where full lightning compliance is not required |
Compared with SMBJ54A and SMCJ54A, the MAPLAD18KP54A provides 30× higher peak pulse power, 17× lower junction-to-case thermal resistance, and formal qualification to RTCA DO-160F and AEC-Q101 - making it the only viable option for certified avionics and high-reliability automotive power protection.
Availability
MAPLAD18KP54A is available at Aetrix Electronics and suitable for avionics power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply, long-lifecycle assurance, and certified surge performance.
Supply support for MAPLAD18KP54A 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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-tolerant, and aerospace-qualified components.
The PLAD family, including MAPLAD18KP54A, was engineered specifically for high-energy transient suppression in safety-critical platforms where multi-stroke lightning resilience, thermal stability, and lot-level traceability are mandatory.
FAQ
What is the maximum clamping voltage of MAPLAD18KP54A at its rated peak pulse current?
The MAPLAD18KP54A has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPP) of 207 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MAPLAD18KP54A maintains this clamping performance across its full operating temperature range when properly mounted per recommended pad layout.
Is MAPLAD18KP54A qualified for automotive applications per AEC-Q101?
Yes, MAPLAD18KP54A is explicitly tested and qualified to AEC-Q101 standards as stated in the RF01215 Rev B datasheet. This qualification covers stress tests including HTGB, HTRB, TST, and surge testing, confirming suitability for under-hood and powertrain ECUs. The MAPLAD18KP54A's 54 V VWM and 87.1 V clamping align with ISO 7637-2 Load Dump requirements for 24 V systems, and its thermal design supports operation at 150 °C junction temperature.
How does the PLAD package of MAPLAD18KP54A improve thermal performance versus standard SMC or SMB packages?
The PLAD package of MAPLAD18KP54A features an exposed metal base acting as both cathode terminal and thermal interface, achieving RθJC = 0.7 °C/W - over 17× better than typical SMC packages (~12 °C/W) and ~57× better than SMB packages (~40 °C/W). This enables MAPLAD18KP54A to sustain repeated 18 kW surges without thermal accumulation when mounted on ≥2 oz copper with thermal vias, a capability unattainable with smaller surface-mount TVS packages.
Can MAPLAD18KP54A be used for bidirectional transient protection?
No, MAPLAD18KP54A is unidirectional only, as indicated by the "A" suffix (vs. "CA" for bidirectional variants like MAPLAD18KP54CA). Its cathode is the metal base, and it conducts only during reverse-biased overvoltage events. For AC-coupled or differential signal line protection requiring symmetrical clamping, the bidirectional MAPLAD18KP54CA must be selected instead - the MAPLAD18KP54A is strictly intended for DC power rail suppression.
What is the moisture sensitivity level (MSL) and reflow profile requirement for MAPLAD18KP54A?
MAPLAD18KP54A has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it is not moisture-sensitive and requires no dry pack or baking prior to reflow. It supports standard lead-free reflow profiles with peak temperature up to 260 °C for 10 seconds, as verified in RF01215 Rev B. The e3 RoHS-compliant matte-tin plating ensures reliable wetting and intermetallic formation during assembly, and the void-free epoxy body prevents popcorn cracking during thermal cycling.
MAPLAD18KP54A 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 207A
- 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
MAPLAD18KP54A FAQ
1.How can I place an order for MAPLAD18KP54A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP54A 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 MAPLAD18KP54A reliable?
The price and inventory of MAPLAD18KP54A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP54A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP54A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP54A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP54A?
MAPLAD18KP54A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP54A 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 MAPLAD18KP54A?
For technical support, including MAPLAD18KP54A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP54A requirements.
6.How does Aetrix verify that MAPLAD18KP54A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP54A 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 MAPLAD18KP54A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP54A?
All MAPLAD18KP54A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP54A, 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 MAPLAD18KP54A part is unused and in its original packaging.
Return procedure for MAPLAD18KP54A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP54A 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…
