My Inquiry
My Account
Microchip Technology MAPLAD18KP43AE3
- Part No.:
- MAPLAD18KP43AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP43AE3.pdf
- Description:
- TVS DIODE 43VWM 69.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,084
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP43AE3 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, features a 43 V reverse standoff voltage (VWM), clamps to ≤69.4 V at 260 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for efficient heat dissipation in lightning and load dump protection circuits.
For engineers reviewing the MAPLAD18KP43AE3 datasheet, MAPLAD18KP43AE3 pinout, MAPLAD18KP43AE3 application, or MAPLAD18KP43AE3 equivalent, key selection criteria include its DO-160F Waveform 4 Level 4 compliance, IEC 61000-4-5 Class 1–5 secondary lightning capability with 42 Ω source impedance, RoHS-compliant e3 plating, and validated 150 °C maximum junction temperature operation under multi-stroke surge conditions.
Technical Context
This TVS diode employs an avalanche breakdown mechanism to clamp transients within nanoseconds, with sub-100 ps response time from 0 V to V(BR) min. Its low RθJC (0.7 °C/W) enables direct mounting on thermally conductive PCB pads or heatsinks, supporting sustained surge duty cycles ≤0.05% per MIL-STD-750 test conditions.
Designed for RTCA DO-160 Section 22 multi-stroke lightning compliance, it meets IEC 61000-4-2 ESD (±30 kV air/±30 kV contact) and IEC 61000-4-4 EFT (40 A, 5/50 ns) immunity standards. The device's cathode is the metal base (package bottom), requiring correct PCB pad layout per RF01215 Rev B for optimal thermal and electrical performance.
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) | 43 V - matches nominal 36 V automotive or 28 V avionics bus systems |
| Clamping Voltage (VC) | ≤69.4 V @ IPP = 260 A - limits downstream IC stress below 70 V during worst-case transients |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables >70 W steady-state dissipation when mounted on copper heatsink |
| Breakdown Voltage (V(BR)) | 47.8–52.8 V @ I(BR) - ensures reliable turn-on margin above 43 V operating voltage |
| Standby Current (ID) | ≤10 μA @ 43 V - negligible leakage in always-on power rail protection |
| Operating Temperature Range | −55 °C to +150 °C - qualified for engine bay, avionics bay, and outdoor telecom enclosures |
Pinout & Package
MAPLAD18KP43AE3 uses a surface-mount PLAD package with two terminals: anode and cathode. The cathode is the exposed metal base (bottom side), requiring thermal pad connection to PCB ground plane or heatsink. Package dimensions: 12.32 × 10.54 × 3.68 mm (L × W × H), with recommended FR4 mounting pad per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (unidirectional) | Connected to protected line (e.g., 28 V DC bus); conducts surge current toward cathode |
| Cathode | Transient current return path / thermal interface | Exposed metal base - must be soldered to large copper area for thermal conduction and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection surges up to 43 V VWM devices - essential for aircraft flight control electronics |
| IEC 61000-4-5 Class 1–5 secondary lightning protection | Rated with 42 Ω source impedance - meets full spectrum of airborne equipment surge immunity requirements |
| RoHS-compliant e3 matte-tin plating | Lead-free, solderable per MIL-STD-750 Method 2026 - supports lead-free reflow assembly without whisker risk |
| Moisture Sensitivity Level 1 | No dry pack required per J-STD-020B - eliminates baking step and reduces handling cost in production |
| AEC-Q101 qualified | Stress-tested for automotive under-hood applications - includes HTOL, TC, UHAST, and surge validation |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC distribution panels in commercial aircraft against DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppression element placed at bus input, clamping multi-stroke surges before they reach upstream converters and controllers. Use Value: Enables compliance with RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) while maintaining <70 V clamping across 260 A peak current. | Use Scenario: Safeguarding engine control units (ECUs) and infotainment modules during alternator load dump events in 12 V/24 V vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at ECU power entry, absorbing 18 kW pulses with <100 ps response to prevent latch-up or gate oxide damage. Use Value: Clamps to ≤69.4 V at 260 A, limiting voltage overshoot below critical thresholds for 3.3 V/5 V logic and CAN transceivers. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Shielding 48–72 V DC bus inputs in variable-frequency drives from switching transients and induced RFI. IC Role / Device Role / Timing Role: High-power TVS placed between rectifier output and bulk capacitor, diverting repetitive 10/1000 μs surges away from IGBT gate drivers. Use Value: 0.7 °C/W RθJC allows continuous operation at 71 W steady-state dissipation when heatsink-mounted - extends reliability beyond 100,000 surge cycles. | Use Scenario: Securing 110 V DC signaling lines in European railway signaling cabinets against EFT bursts and lightning coupling. IC Role / Device Role / Timing Role: Bidirectional-capable variant used in differential pair protection (with CA suffix), but MAPLAD18KP43AE3 serves as unidirectional rail clamp on supply side. Use Value: Meets EN 50121-3-2 immunity requirements for Class 3 equipment via IEC 61000-4-4 (40 A) and IEC 61000-4-5 (Class 3, 42 Ω source). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | 600 W PPP rating, 5.0 mm × 3.5 mm SMB package, RθJA = 40 °C/W (no case thermal path) | Limited to single-stroke surges; not DO-160F or AEC-Q101 qualified | Select for cost-sensitive industrial controls where multi-stroke lightning testing is not required |
| SMCJ43A | 1500 W PPP, SMC package, RθJA = 25 °C/W, no RθJC spec - relies on PCB copper for thermal management | Not rated for DO-160F Waveform 4; lacks 42 Ω IEC 61000-4-5 Class 4/5 validation | Use where space permits larger SMC footprint and surge duty cycle is <0.01% |
Compared with SMBJ43A and SMCJ43A, MAPLAD18KP43AE3 provides 30× higher peak power handling, certified multi-stroke lightning resilience, and a dedicated thermal interface enabling stable operation under repeated 18 kW surges - making it irreplaceable in aerospace and high-reliability automotive power systems.
Availability
MAPLAD18KP43AE3 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-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD18KP43AE3 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 analog, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD series is part of Microsemi's high-power transient voltage suppressor product line, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in mission-critical systems where thermal robustness and certification traceability are mandatory.
FAQ
What is the clamping voltage of MAPLAD18KP43AE3 at its rated peak pulse current?
The clamping voltage (VC) of MAPLAD18KP43AE3 is guaranteed ≤69.4 V at 260 A peak impulse current (IPP) 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 worst-case transients. MAPLAD18KP43AE3 maintains this clamping performance across its full −55 °C to +150 °C operating range when properly mounted.
Does MAPLAD18KP43AE3 meet DO-160F Section 22 lightning requirements?
Yes, MAPLAD18KP43AE3 is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 compliance. The device's 18,000 W PPP rating, low RθJC (0.7 °C/W), and thermal design enable it to withstand repeated lightning surges without degradation. MAPLAD18KP43AE3 data appears in Table 1 of RF01215 Rev B under "Pin injection protection per RTCA/DO-160F".
What is the polarity and terminal configuration of MAPLAD18KP43AE3?
MAPLAD18KP43AE3 is a unidirectional TVS diode with cathode on the metal base (bottom surface) and anode on the top-side metallization. Per RF01215 Rev B, "The cathode is the metal base under the body of this device." This configuration requires the metal base to be soldered to a thermally conductive PCB ground plane or heatsink, while the anode connects to the protected line. No top-side polarity marking is present - orientation is defined by mechanical mounting.
Is MAPLAD18KP43AE3 RoHS compliant and what does the 'E3' suffix indicate?
Yes, MAPLAD18KP43AE3 is RoHS compliant, as confirmed by the 'E3' suffix in its part number. According to RF01215 Rev B, "e3 = RoHS compliant", indicating annealed matte-tin plating that meets EU Directive 2011/65/EU and is solderable per MIL-STD-750 Method 2026. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE, and has passed JEDEC J-STD-020B moisture sensitivity Level 1 qualification.
How does the thermal performance of MAPLAD18KP43AE3 compare to standard SMB/SMC TVS diodes?
MAPLAD18KP43AE3 achieves 0.7 °C/W junction-to-case thermal resistance (RθJC), far superior to standard SMB (RθJA ≈ 40 °C/W) or SMC (RθJA ≈ 25 °C/W) packages that lack a dedicated thermal path. This enables MAPLAD18KP43AE3 to dissipate >70 W continuously when mounted on a heatsink, whereas SMBJ43A and SMCJ43A rely solely on PCB copper and cannot sustain multi-stroke 18 kW surges. MAPLAD18KP43AE3's thermal design is fundamental to its DO-160F and AEC-Q101 qualifications.
MAPLAD18KP43AE3 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 260A
- 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
MAPLAD18KP43AE3 FAQ
1.How can I place an order for MAPLAD18KP43AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP43AE3 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 MAPLAD18KP43AE3 reliable?
The price and inventory of MAPLAD18KP43AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP43AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP43AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP43AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP43AE3?
MAPLAD18KP43AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP43AE3 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 MAPLAD18KP43AE3?
For technical support, including MAPLAD18KP43AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP43AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP43AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP43AE3 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 MAPLAD18KP43AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP43AE3?
All MAPLAD18KP43AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP43AE3, 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 MAPLAD18KP43AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP43AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP43AE3 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…
