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Microchip Technology MAPLAD36KP48CA
- Part No.:
- MAPLAD36KP48CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP48CA.pdf
- Description:
- TVS DIODE 48VWM 77.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,918
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Product details
Overview
MAPLAD36KP48CA 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, clamps transients to ≤77.4 V at 466 A, and features a 48 V reverse standoff voltage (VWM) with ±5% tolerance. It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 5 secondary lightning protection with 42 Ω source impedance.
For engineers reviewing the MAPLAD36KP48CA datasheet, MAPLAD36KP48CA pinout, MAPLAD36KP48CA application, or MAPLAD36KP48CA equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, bidirectional symmetry, thermal robustness (RθJC = 1.0 °C/W), and MIL-PRF-19500 upscreening capability are critical design requirements.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device, triggering at breakdown voltage (V(BR) = 53.3–58.9 V) to shunt surge current away from sensitive circuitry. Its void-free thermosetting epoxy package enables direct metal-base thermal conduction to PCB copper, supporting sustained energy dissipation under repetitive 0.05% duty-cycle impulses.
It complies with AEC-Q101 stress testing and provides ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and pin-injection protection per RTCA/DO-160F Waveform 4 (Level 4 up to 400 V) and Waveform 5A (Level 4 up to 78 V). Bidirectional construction ensures symmetrical clamping for AC-coupled or floating-rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 48 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 53.3–58.9 V @ 5 mA - precise trigger threshold ensuring reliable overvoltage detection |
| Max Clamping Voltage (VC) | 77.4 V @ 466 A - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or copper pour for thermal reliability |
| Surge Current Rating (IPP) | 466 A @ 10/1000 μs - quantifies maximum transient current it can safely divert |
| Temperature Coefficient (αV(BR)) | +54 mV/°C - predictable V(BR) drift across -55°C to +150°C operating range |
Pinout & Package
MAPLAD36KP48CA uses a surface-mount PLAD package with two terminals: anode and cathode formed on opposite sides of the metal base. The cathode is the exposed metal base (bottom side); polarity marking applies only to unidirectional variants - bidirectional devices like MAPLAD36KP48CA have symmetric terminal behavior and no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top-side metallization) | Current entry point during positive transients | Connected to protected line; forms one half of bidirectional clamping path |
| Cathode (Metal base / bottom) | Current return path during both polarities | Must be soldered to large copper area for thermal conduction and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of AC-coupled interfaces or floating rails without polarity constraints |
| 1.0 °C/W RθJC thermal resistance | Supports >2.5 W steady-state dissipation at TC = 100°C with minimal board-area footprint |
| RTCA DO-160 Section 22 compliance | Validated for multi-stroke lightning events in aircraft avionics power distribution units |
| MIL-PRF-19500 upscreening option | Enables qualification for high-reliability military/aerospace programs requiring lot traceability and 3σ ID screening |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations for SMT assembly |
Applications
| Aircraft Power Distribution Units | Automotive 48 V DC Bus Protection |
|---|---|
Use Scenario: Protecting 28 V nominal aircraft DC bus against lightning-induced transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary surge suppression element placed at bus input, clamping fast-rising transients before they reach downstream converters and controllers. Use Value: Delivers 36 kW pulse handling with <100 ps response time, meeting Level 4 pin-injection and Class 5 lightning immunity without derating. |
Use Scenario: Safeguarding next-generation 48 V mild-hybrid vehicle ECUs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across battery rail to clamp both positive and negative spikes during alternator regulation faults or battery reversal events. Use Value: 48 V VWM matches system nominal voltage; 77.4 V clamping prevents damage to 80 V-rated MOSFETs and gate drivers. |
| Railway Signaling Power Supplies | Industrial Motor Drive DC Links |
Use Scenario: Securing EN 50121-3-2 compliant signaling power inputs against induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Secondary protection stage after upstream MOVs, absorbing residual energy with low clamping voltage and high repetition tolerance. Use Value: 0.05% impulse duty factor rating supports repeated switching surges in trackside cabinets without thermal runaway. |
Use Scenario: Protecting IGBT gate drivers and bus capacitors in variable-frequency drives subjected to regenerative braking spikes. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly across DC link to clamp commutation-induced voltage overshoots before they exceed capacitor or semiconductor ratings. Use Value: 1.0 °C/W RθJC allows direct thermal coupling to aluminum heatsink, maintaining clamping performance under 10 Hz switching cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA | Lower PPP (600 W), smaller SMB package, higher RθJA (50 °C/W), no MIL-PRF-19500 screening | Suitable for consumer-grade 48 V systems with infrequent surges; not rated for DO-160F or Class 5 IEC 61000-4-5 | Select when cost and board space outweigh aerospace/automotive reliability requirements |
| SMCJ48CA | Higher PPP (1500 W), larger SMC package, RθJC ≈ 2.5 °C/W, no RTCA DO-160 validation | Used in industrial motor controls and telecom power supplies; lacks multi-stroke lightning certification | Choose for mid-power industrial applications needing better thermal margin than SMBJ but less than MAPLAD36KP48CA |
Compared with SMBJ48CA and SMCJ48CA, MAPLAD36KP48CA provides 24× and 24× higher peak pulse power respectively, validated multi-stroke lightning performance, and a thermally optimized metal-base package enabling direct heatsink mounting - making it uniquely suited for mission-critical aerospace and high-end automotive platforms.
Availability
MAPLAD36KP48CA is available at Aetrix Electronics and suitable for aircraft power distribution, 48 V automotive electronics, railway signaling systems, and industrial motor drive designs requiring stable component supply and long-term obsolescence management.
Supply support for MAPLAD36KP48CA 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 components for aerospace, defense, and industrial markets.
MAPLAD36KP48CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical transportation and infrastructure systems.
FAQ
What is the clamping voltage of MAPLAD36KP48CA at its rated peak pulse current?
The MAPLAD36KP48CA has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPP) of 466 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MAPLAD36KP48CA maintains this clamping performance across its full operating temperature range of –55°C to +150°C.
Is MAPLAD36KP48CA suitable for RTCA DO-160F Section 22 lightning testing?
Yes, MAPLAD36KP48CA is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing. Its 36,000 W peak pulse power rating, low clamping voltage, and thermal design enable it to withstand repeated lightning surges without degradation. The MAPLAD36KP48CA meets Level 4 pin-injection protection for Waveform 4 and is rated for Class 5 secondary lightning protection with 42 Ω source impedance - key requirements for aircraft avionics certification.
Does MAPLAD36KP48CA require a heatsink for continuous operation?
MAPLAD36KP48CA does not require an external heatsink for single-pulse surge events, but its 2.5 W steady-state power dissipation rating at TA = 25°C necessitates proper PCB thermal design for any sustained bias. For reliable long-term operation, the metal base (cathode) must be soldered to ≥1 in² of 2-oz copper with thermal vias. The MAPLAD36KP48CA's 1.0 °C/W junction-to-case thermal resistance enables effective heat transfer only when this copper area is implemented per the recommended pad layout.
How does the bidirectional construction of MAPLAD36KP48CA affect its circuit placement?
The bidirectional construction of MAPLAD36KP48CA eliminates polarity sensitivity, allowing placement across any two nodes where symmetrical overvoltage protection is needed - such as AC signal lines, differential buses, or floating DC rails. Unlike unidirectional TVS diodes, MAPLAD36KP48CA clamps equally for both positive and negative transients without requiring orientation verification during assembly. This simplifies layout and reduces risk of misplacement in high-density boards.
Can MAPLAD36KP48CA be used in AEC-Q101 qualified automotive modules?
Yes, MAPLAD36KP48CA is tested and qualified to AEC-Q101 standards for discrete semiconductors, including stress tests for temperature cycling, humidity, and surge robustness. Its bidirectional architecture, 48 V standoff, and 77.4 V clamping make it suitable for protecting 48 V automotive subsystems such as ADAS domain controllers and electric power steering ECUs. The MAPLAD36KP48CA also supports optional MIL-PRF-19500 upscreening for enhanced lot traceability in Tier-1 automotive programs.
MAPLAD36KP48CA 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 466A
- 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
MAPLAD36KP48CA FAQ
1.How can I place an order for MAPLAD36KP48CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP48CA 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 MAPLAD36KP48CA reliable?
The price and inventory of MAPLAD36KP48CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP48CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP48CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP48CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP48CA?
MAPLAD36KP48CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP48CA 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 MAPLAD36KP48CA?
For technical support, including MAPLAD36KP48CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP48CA requirements.
6.How does Aetrix verify that MAPLAD36KP48CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP48CA 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 MAPLAD36KP48CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP48CA?
All MAPLAD36KP48CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP48CA, 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 MAPLAD36KP48CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP48CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP48CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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