My Inquiry
My Account
Microchip Technology MAPLAD36KP78CAE3
- Part No.:
- MAPLAD36KP78CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP78CAE3.pdf
- Description:
- TVS DIODE 78VWM 126VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,640
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD36KP78CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, features a 78 V reverse standoff voltage (VWM), clamps transients to ≤126 V at 286 A IPP, and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 4 (12 Ω source) requirements.
For engineers reviewing the MAPLAD36KP78CAE3 datasheet, MAPLAD36KP78CAE3 pinout, MAPLAD36KP78CAE3 application, or MAPLAD36KP78CAE3 equivalent, this device is selected for secondary lightning protection, load dump suppression, and ESD/EFT hardening where low-profile SMT mounting, traceable high-reliability screening, and multi-stroke surge endurance are required.
Technical Context
This TVS operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior, enabling protection of AC-coupled or differential signal/power lines without polarity concerns. Its thermal resistance junction-to-case is 1.0 °C/W, and it achieves <5 ns response time from 0 V to V(BR) min under transient conditions.
The device is rated for -55°C to +150°C operating temperature, supports steady-state power dissipation up to 71 W at TC = 100°C, and exhibits a breakdown voltage range of 86.7–95.8 V at 5 mA test current, with ±10% VWM tolerance and 95 mV/°C temperature coefficient of V(BR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 78 V - maximum continuous operating voltage before clamping initiates |
| Clamping Voltage (VC) | ≤126 V @ IPP = 286 A - limits downstream voltage stress during worst-case surge |
| Breakdown Voltage (V(BR)) | 86.7–95.8 V @ 5 mA - defines precise avalanche onset threshold for predictable protection |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables effective heat transfer to PCB copper or heatsink for repeated surge duty |
| Response Time | <5 ns - ensures sub-nanosecond turn-on for fast-rising transients like ESD and RFI |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow soldering |
Pinout & Package
MAPLAD36KP78CAE3 uses a thermally optimized PLAD surface-mount package with metal base cathode termination. The device has two terminals: anode and cathode, with polarity marked only on unidirectional variants; bidirectional versions (including MAPLAD36KP78CAE3) have symmetrical construction and no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in unidirectional mode; one side of symmetrical clamp in bidirectional mode | Connected to line/pin requiring protection; forms low-impedance path to cathode during overvoltage |
| Cathode | Negative terminal in unidirectional mode; second side of symmetrical clamp in bidirectional mode | Typically tied to ground or return plane; serves as reference node for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC signals, differential buses, or floating power rails without polarity constraints |
| RoHS-compliant matte-tin plating (e3) | Ensures reliable solderability and compatibility with lead-free reflow profiles per MIL-STD-750 |
| Void-free UL94V-0 epoxy body | Provides flame resistance and mechanical robustness in harsh environmental enclosures |
| 3σ lot norm screening on standby current (ID) | Guarantees consistent leakage performance across production lots for mission-critical reliability |
| MIL-PRF-19500 upscreening option | Supports high-reliability qualification for aerospace programs requiring extended screening and traceability |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight control computers subjected to RTCA DO-160F Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary secondary surge suppressor placed at board-level input filter stage. Use Value: Withstands ≥100 multi-stroke 36 kW surges while maintaining VWM = 78 V and clamping ≤126 V, preserving upstream DC-DC converter integrity. |
Use Scenario: Load dump suppression on 12 V battery-fed microcontroller power rails in diesel engine management systems. IC Role / Device Role / Timing Role: High-energy TVS shunting transient energy away from sensitive logic and analog circuitry. Use Value: Handles 12 V system load dump pulses up to 36,000 W with <5 ns response, preventing latch-up or burnout in AEC-Q101-qualified designs. |
| Industrial Motor Drive Gate Driver Supply | Railway Signaling Interface |
Use Scenario: Protection of isolated gate driver bias supplies exposed to inductive switching noise and ground bounce in 3-phase inverters. IC Role / Device Role / Timing Role: Bidirectional clamp across isolated DC supply rails to suppress common-mode transients. Use Value: Symmetrical 78 V standoff and ≤126 V clamping ensure balanced protection of both rails without polarity misalignment risk. |
Use Scenario: Surge hardening of 75 Ω coaxial data links in track-side signaling equipment per EN 50121-4. IC Role / Device Role / Timing Role: Line-to-ground TVS on RS-485 or MVB physical layer interfaces. Use Value: Meets IEC 61000-4-5 Class 4 (12 Ω source) with 286 A IPP rating, ensuring immunity to rail-induced surges up to 4 kV. |
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 SMAJ78CA | Lower PPP (400 W), smaller SMA package, 78 V VWM, 121 V VC @ 3.3 A IPP | Suitable for low-energy consumer electronics; insufficient for DO-160F multi-stroke or automotive load dump | Select MAPLAD36KP78CAE3 when >36 kW surge handling, aerospace compliance, or high-reliability traceability is required. |
| Vishay VMM78CA | 36 kW PPP, same 78 V VWM, but TO-277 package with higher RθJA (50 °C/W vs. 1.0 °C/W), no MIL-PRF-19500 option | Acceptable for industrial surge suppression; lacks thermal performance and screening for avionics deployment | Choose MAPLAD36KP78CAE3 for PCB space-constrained designs needing superior thermal coupling and upscreening capability. |
Compared with SMAJ78CA and VMM78CA, MAPLAD36KP78CAE3 uniquely combines 36 kW surge capacity, 1.0 °C/W thermal resistance, bidirectional symmetry, and MIL-PRF-19500 upscreening readiness-making it the only option qualified for RTCA DO-160F Waveform 4 Level 4 in compact SMT form.
Availability
MAPLAD36KP78CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain systems, and industrial motor drive designs requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP78CAE3 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 MAPLAD36KP78CAE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical platforms.
FAQ
What is the clamping voltage of MAPLAD36KP78CAE3 at its rated peak pulse current?
The MAPLAD36KP78CAE3 has a maximum clamping voltage (VC) of 126 V at its peak pulse current (IPP) of 286 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and ensures downstream circuitry remains within safe voltage margins during high-energy transients.
Is MAPLAD36KP78CAE3 compliant with AEC-Q101 for automotive use?
Yes, MAPLAD36KP78CAE3 is tested in accordance with AEC-Q101 requirements, as confirmed in the RF01216 datasheet. Its qualification covers temperature cycling, humidity testing, and surge endurance-making it suitable for under-hood automotive applications such as engine control units and battery management systems.
Does MAPLAD36KP78CAE3 require special PCB layout considerations for thermal management?
Yes. MAPLAD36KP78CAE3 requires adherence to the recommended pad layout in RF01216 (page 6), including minimum 11.94 mm × 5.85 mm copper area and thermal vias to inner ground planes. Its 1.0 °C/W RθJC depends on proper copper mass and thermal conduction-undersized pads reduce surge endurance significantly.
What does the "CA" suffix indicate in MAPLAD36KP78CAE3?
The "CA" suffix in MAPLAD36KP78CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, CA devices have no polarity marking and protect AC-coupled or floating circuits without orientation constraints.
Can MAPLAD36KP78CAE3 be used for IEC 61000-4-5 Class 5 surge protection?
No-MAPLAD36KP78CAE3 is rated for IEC 61000-4-5 Class 4 with 12 Ω source impedance (per RF01216, page 1). For Class 5, Microsemi specifies lower-voltage variants (e.g., MPLAD36KP38CA); MAPLAD36KP78CAE3's 78 V VWM exceeds the required standoff for Class 5's 2 kV test level.
MAPLAD36KP78CAE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 286A
- 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
MAPLAD36KP78CAE3 FAQ
1.How can I place an order for MAPLAD36KP78CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP78CAE3 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 MAPLAD36KP78CAE3 reliable?
The price and inventory of MAPLAD36KP78CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP78CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP78CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP78CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP78CAE3?
MAPLAD36KP78CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP78CAE3 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 MAPLAD36KP78CAE3?
For technical support, including MAPLAD36KP78CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP78CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP78CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP78CAE3 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 MAPLAD36KP78CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP78CAE3?
All MAPLAD36KP78CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP78CAE3, 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 MAPLAD36KP78CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP78CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP78CAE3 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…
