My Inquiry
My Account
Microchip Technology MAPLAD36KP43A
- Part No.:
- MAPLAD36KP43A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP43A.pdf
- Description:
- TVS DIODE 43VWM 69.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,937
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD36KP43A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 43 V reverse standoff voltage (VWM), clamps to ≤69.4 V at 519 A peak current, and operates across –55°C to +150°C junction temperature - deployed in aircraft lightning protection per RTCA DO-160 Section 22.
For engineers reviewing the MAPLAD36KP43A datasheet, MAPLAD36KP43A pinout, MAPLAD36KP43A application, or MAPLAD36KP43A equivalent, key selection criteria include its 43 V VWM rating, 69.4 V max clamping voltage at 519 A, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and suitability for secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance up to Class 5.
Technical Context
The MAPLAD36KP43A uses an avalanche diode structure optimized for low clamping ratio and minimal thermal resistance. Its metal-base package enables direct heat sinking, supporting sustained multi-stroke surge events under RTCA DO-160 Waveform 4 and 5A testing conditions.
It meets AEC-Q101 stress requirements and supports MIL-PRF-19500 upscreening options. Standby leakage is limited to 10 μA at 43 V, and breakdown occurs between 47.8 V and 52.8 V at 5 mA test current - ensuring precise overvoltage threshold control in DC bus protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous operating voltage before clamping begins; matches 36–42 V nominal DC bus systems. |
| V(BR) min/max | 47.8–52.8 V @ 5 mA - defines reliable avalanche onset range for predictable turn-on behavior. |
| VC @ IPP | ≤69.4 V @ 519 A - limits downstream voltage stress during 10/1000 μs transients. |
| PPP | 36,000 W @ 10/1000 μs - sustains extreme lightning-induced surges without failure. |
| RθJC | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink for thermal reliability. |
| ID @ VWM | ≤10 μA - negligible standby leakage preserves system efficiency in always-on applications. |
| Package | PLAD - surface-mount thermoset epoxy case with metal base cathode; UL94V-0 rated. |
Pinout & Package
MAPLAD36KP43A uses the PLAD package: a void-free transfer-molded thermosetting epoxy body with exposed metal base acting as the cathode terminal. The device has two terminals - anode (top metallization) and cathode (entire bottom metal surface) - requiring dedicated thermal pad layout per datasheet Figure "PAD LAYOUT".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge input node | Connected to protected line (e.g., aircraft avionics DC rail); current flows into device during overvoltage event. |
| Cathode (metal base) | Return path / heat sink interface | Entire bottom surface serves as low-inductance return and primary thermal conduction path to PCB copper or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse power | Enables single-device compliance with RTCA DO-160 Section 22 multi-stroke lightning standards without parallel stacking. |
| 1.0 °C/W RθJC | Allows >2.5 W steady-state dissipation at TC = 100°C - supports hybrid surge + bias operation in engine control units. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and handling risk. |
| AEC-Q101 qualified | Validated for automotive under-hood environments including temperature cycling, mechanical shock, and humidity exposure. |
| e3 RoHS-compliant plating | Matte-tin termination ensures solderability per MIL-STD-750 Method 2026 and eliminates lead-related compliance concerns. |
Applications
| Aircraft Avionics Power Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC distribution buses in flight control computers from induced lightning transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus entry point to clamp surges before reaching sensitive ADCs, FPGAs, and CAN transceivers. Use Value: 69.4 V clamping ensures downstream 3.3 V/5 V logic remains within absolute maximum ratings even during 519 A 10/1000 μs strikes. | Use Scenario: Safeguarding 12 V battery-fed ECU microcontrollers against load dump spikes up to 60 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuse and downstream LC filtering. Use Value: 43 V VWM aligns with 12 V system derated peak (≈40 V), while 36 kW rating handles repeated 120 V/500 ms load dump events without degradation. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: Secondary surge suppression on 400 V DC link of variable-frequency drives exposed to switching transients and EFT noise. IC Role / Device Role / Timing Role: Fast-response TVS paralleled with bulk capacitance to absorb IGBT turn-off energy and reduce dv/dt stress on electrolytics. Use Value: 1.0 °C/W RθJC allows direct mounting to aluminum heatsink, enabling >1000 surge cycles at 1 Hz repetition rate without thermal runaway. | Use Scenario: Protecting 72 V DC signaling power supplies in trackside cabinets from induced surges due to nearby traction current switching. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD36KP43CA) used in differential pair protection; unidirectional MAPLAD36KP43A applied to single-rail inputs. Use Value: Compliance with IEC 61000-4-5 Class 4 (42 Ω source) ensures immunity to 4 kV surges common in rail electromagnetic environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP36-43 | Same 43 V VWM and 36 kW rating, but TO-277 package with higher RθJA (50 °C/W vs. 1.0 °C/W); no AEC-Q101 qualification. | Less suitable for high-reliability aerospace use; requires larger PCB area and external heatsinking. | Select when cost sensitivity outweighs thermal performance and qualification requirements. |
| Vishay SMAJ43A | Lower PPP (400 W), smaller SMA package, 10× lower IPP (12.3 A), and no DO-160 or AEC-Q101 validation. | Only appropriate for low-energy ESD/EFT protection - not for lightning or load dump. | Choose only for consumer-grade board-level ESD clamping where 36 kW capability is unnecessary. |
Compared with SP36-43 and SMAJ43A, MAPLAD36KP43A uniquely combines aerospace-grade qualification, ultra-low thermal resistance, and full 36 kW surge capacity in a surface-mount form - making it irreplaceable for mission-critical lightning protection where thermal management and multi-stroke endurance are non-negotiable.
Availability
MAPLAD36KP43A is available at Aetrix Electronics and suitable for aircraft avionics, automotive engine control units, industrial motor drives, and railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP43A 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 analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The PLAD-series TVS family was engineered specifically for high-power, high-reliability transient suppression in safety-critical platforms - emphasizing thermal robustness, surge endurance, and qualification to RTCA DO-160, AEC-Q101, and MIL-PRF-19500 standards.
FAQ
What is the clamping voltage of MAPLAD36KP43A at its rated peak pulse current?
The MAPLAD36KP43A exhibits a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 519 A under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees that downstream circuitry remains within safe operating voltage limits during worst-case surge events. The clamping performance is validated across the full operating temperature range and forms the basis for system-level overvoltage margin calculations in MAPLAD36KP43A-based designs.
Is MAPLAD36KP43A qualified to AEC-Q101 for automotive use?
Yes, MAPLAD36KP43A is tested and qualified to AEC-Q101 Rev D for stress testing including temperature cycling, mechanical shock, and humidity exposure. This qualification confirms its suitability for under-hood automotive applications such as engine control units and transmission control modules where reliability under thermal and mechanical stress is critical. MAPLAD36KP43A's qualification documentation is available upon request from Aetrix Electronics' technical support team.
How does the PLAD package of MAPLAD36KP43A improve thermal performance compared to standard SMD TVS devices?
The PLAD package of MAPLAD36KP43A features an exposed metal base that serves as both the cathode terminal and primary thermal conduction path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W. This is up to 50× lower than typical SMA/SMB packages, enabling efficient heat transfer directly to PCB copper or external heatsinks. As a result, MAPLAD36KP43A sustains higher steady-state power and survives repeated high-energy surges without thermal runaway - a key advantage in aerospace and industrial applications.
Can MAPLAD36KP43A be used for bidirectional surge protection?
No, MAPLAD36KP43A is a unidirectional TVS device. For bidirectional protection at the same 43 V standoff level, the designated variant is MAPLAD36KP43CA - which adds the 'CA' suffix to indicate symmetrical breakdown in both polarities. Using MAPLAD36KP43A in AC-coupled or differential signal paths would result in forward conduction during negative transients and potential device failure. Always match polarity designation to circuit topology.
What is the moisture sensitivity level (MSL) of MAPLAD36KP43A, and does it require baking before reflow?
MAPLAD36KP43A is rated at Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and does not require dry pack packaging or pre-reflow baking. This simplifies manufacturing logistics and eliminates yield loss associated with moisture-induced popcorning during reflow soldering. The PLAD package's void-free epoxy construction and hermetic-like sealing contribute to this robust MSL rating.
MAPLAD36KP43A 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):
- 519A
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MAPLAD36KP43A FAQ
1.How can I place an order for MAPLAD36KP43A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP43A 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 MAPLAD36KP43A reliable?
The price and inventory of MAPLAD36KP43A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP43A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP43A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP43A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP43A?
MAPLAD36KP43A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP43A 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 MAPLAD36KP43A?
For technical support, including MAPLAD36KP43A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP43A requirements.
6.How does Aetrix verify that MAPLAD36KP43A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP43A 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 MAPLAD36KP43A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP43A?
All MAPLAD36KP43A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP43A, 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 MAPLAD36KP43A part is unused and in its original packaging.
Return procedure for MAPLAD36KP43A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP43A 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…
