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Microchip Technology MPLAD36KP45CA
- Part No.:
- MPLAD36KP45CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP45CA.pdf
- Description:
- TVS DIODE 45VWM 72.7VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,714
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Product details
Overview
MPLAD36KP45CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 45 V reverse standoff voltage (VWM), clamps to ≤72.7 V at 496 A peak impulse current, and operates across –55°C to +150°C junction temperature.
For engineers reviewing the MPLAD36KP45CA datasheet, MPLAD36KP45CA pinout, MPLAD36KP45CA application, or MPLAD36KP45CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source impedances), RTCA DO-160F Waveform 4 & 5A pin injection compliance, and ESD/EFT immunity per IEC 61000-4-2/4-4 - critical for avionics power inputs, DC bus lines, and battery management interfaces.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transients within nanoseconds, with <5 ns response time for bidirectional operation. Its low thermal resistance (RθJC = 1.0 °C/W) enables efficient heat transfer to PCB copper pads or heatsinks under multi-stroke surge conditions.
Designed for compliance with RTCA DO-160 Section 22 (lightning-induced transients) and IEC 61000-4-5 Class 1–5, the MPLAD36KP45CA supports both short- and long-distance coupling configurations depending on source impedance - validated for 42 Ω (Class 1–5), 12 Ω (Class 1–4), and 2 Ω (Class 2–4) test setups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-level lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 45 V - maximum continuous DC or peak AC voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 50.0–55.3 V @ 5 mA - defines reliable avalanche initiation threshold |
| Clamping Voltage (VC) | ≤72.7 V @ 496 A IPP - limits downstream circuit voltage during worst-case surge |
| Peak Impulse Current (IPP) | 496 A @ 10/1000 μs - quantifies maximum single-event surge current handling |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct thermal coupling to metal-core PCB or heatsink for duty-cycle derating |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow |
Pinout & Package
Package: PLAD (Plastic Leaded Anodeless Device), surface-mount, void-free UL94V-0 epoxy body with tin-plated terminals; cathode is the metal base (bottom side) for unidirectional variants - bidirectional MPLAD36KP45CA has symmetrical terminal configuration with no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode-side pad) | Anode connection (bidirectional symmetry) | One end of the bidirectional avalanche junction; soldered to protected line (e.g., DC+ or signal line) |
| Terminal 2 (Cathode-side pad) | Cathode connection (bidirectional symmetry) | Other end of the bidirectional junction; soldered to reference plane (e.g., chassis ground or DC–) |
| Metal base (underside) | Thermal path / mechanical anchor | Primary heat dissipation surface; requires thermal pad with ≥2 oz copper and thermal vias for rated PPP |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Protects AC-coupled or floating DC lines without polarity concerns - essential for CAN bus, sensor bridges, and dual-rail supplies |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4 (6.4/69 μs) and Level 5 (40/120 μs) pin injection - meets avionics EMI hardening requirements |
| AEC-Q101 qualified | Qualified for automotive underhood applications including load dump and alternator transients |
| MIL-PRF-19500 upscreening option | Available with high-reliability screening (M, MA, MX, MXL levels) for space-grade or mission-critical deployments |
| RoHS-compliant (e3 marking) | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating - compatible with lead-free reflow profiles |
Applications
| Avionics Power Input Protection | Automotive Battery Management System (BMS) |
|---|---|
|
Use Scenario: 28 V DC aircraft power bus exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge clamp at main power entry point, placed before DC-DC converters and distribution fuses. Use Value: Limits transient voltage to ≤72.7 V during 42 Ω IEC 61000-4-5 Class 5 events, preventing latch-up or destruction of downstream PMICs and microcontrollers. |
Use Scenario: High-voltage BMS cell monitoring interface subjected to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element across isolated analog sensing lines (e.g., LTC6813 front-end). Use Value: Suppresses EFT bursts per IEC 61000-4-4 while maintaining signal integrity below 45 V standoff - avoids false triggering of overvoltage alarms. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
|
Use Scenario: 48 V DC bus in variable-frequency drive enclosures experiencing regenerative braking spikes and contactor arcing. IC Role / Device Role / Timing Role: Low-inductance TVS mounted directly across bus rails near IGBT gate drivers. Use Value: Absorbs 36 kW surges with <5 ns response, limiting rail overshoot to safe levels for 600 V-rated capacitors and gate drivers. |
Use Scenario: 72 V signaling line in railway trackside electronics exposed to induced lightning currents. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), placed before RS-485 transceivers. Use Value: Provides precise clamping at 72.7 V to protect ISO1176-level isolation barriers without compromising common-mode rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | 5.0 kW PPP rating, SMC package, 70 V VC @ 32.4 A IPP - lower energy capacity and slower thermal recovery | Not suitable for DO-160F Level 5 or IEC 61000-4-5 Class 4/5; limited to consumer-grade surge environments | Select only for cost-sensitive, low-duty-cycle applications where 36 kW capability is unnecessary |
| SMCJ45CA | 1500 W PPP rating, same SMC package, 70 V VC @ 107 A IPP - one order of magnitude lower peak power | Cannot meet multi-stroke lightning standards; insufficient for avionics or heavy industrial use | Use only in non-safety-critical embedded systems with verified low-energy threat profiles |
Compared with SMBJ45CA and SMCJ45CA, the MPLAD36KP45CA provides 24× and 240× higher peak pulse power respectively, enabling compliance with stringent aerospace and transportation surge standards that require sustained multi-kiloampere clamping without degradation.
Availability
MPLAD36KP45CA is available at Aetrix Electronics and suitable for avionics power input protection, automotive battery management systems, industrial motor drive DC buses, and railway signaling interfaces requiring stable component supply across extended production lifecycles.
Supply support for MPLAD36KP45CA 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 semiconductor solutions for aerospace, defense, communications, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and robust discrete components.
The MPLAD36KP45CA belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for compliance with RTCA DO-160, IEC 61000-4-5, and AEC-Q101 - targeting mission-critical surge protection in harsh electromagnetic environments.
FAQ
What is the clamping voltage of MPLAD36KP45CA at its rated peak pulse current?
The MPLAD36KP45CA has a maximum clamping voltage (VC) of 72.7 V when subjected to its rated peak impulse current of 496 A under 10/1000 μs waveform conditions. This value is measured across the device terminals during standardized surge testing and ensures downstream circuitry remains within safe operating voltage limits during transient events.
Is MPLAD36KP45CA compliant with RTCA DO-160F for lightning-induced transients?
Yes, the MPLAD36KP45CA is validated for RTCA DO-160F Section 22 lightning-induced transient testing. It meets Waveform 4 (6.4/69 μs) Level 4 and Level 5, and Waveform 5A (40/120 μs) Level 4 up to 300 V VWM and Level 5 up to 38 V VWM - confirming suitability for commercial and military avionics power and signal lines.
Does MPLAD36KP45CA require special PCB layout considerations for thermal performance?
Yes, the MPLAD36KP45CA requires a dedicated thermal pad on the PCB matching the metal base dimensions (12.32 × 10.54 mm), with ≥2 oz copper and ≥6 thermal vias to an internal ground plane. Per datasheet Figure 3, steady-state power derating begins above 100°C case temperature - proper layout maintains RθJC ≈ 1.0 °C/W for full 36 kW pulse capability.
What does the "CA" suffix indicate in MPLAD36KP45CA?
The "CA" suffix in MPLAD36KP45CA denotes bidirectional construction - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, it has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
Can MPLAD36KP45CA be used in automotive applications per AEC-Q101?
Yes, the MPLAD36KP45CA is AEC-Q101 qualified for automotive use. It withstands load dump transients (ISO 7637-2 Pulse 5a/b), ESD (IEC 61000-4-2 ±15 kV air/±8 kV contact), and EFT (IEC 61000-4-4) - making it suitable for under-hood ECUs, battery disconnect units, and high-voltage BMS interfaces in 12 V, 24 V, and 48 V architectures.
MPLAD36KP45CA 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 496A
- 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
MPLAD36KP45CA FAQ
1.How can I place an order for MPLAD36KP45CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP45CA 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 MPLAD36KP45CA reliable?
The price and inventory of MPLAD36KP45CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP45CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP45CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP45CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP45CA?
MPLAD36KP45CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP45CA 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 MPLAD36KP45CA?
For technical support, including MPLAD36KP45CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP45CA requirements.
6.How does Aetrix verify that MPLAD36KP45CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP45CA 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 MPLAD36KP45CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP45CA?
All MPLAD36KP45CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP45CA, 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 MPLAD36KP45CA part is unused and in its original packaging.
Return procedure for MPLAD36KP45CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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