My Inquiry
My Account
Microchip Technology MPLAD36KP33A
- Part No.:
- MPLAD36KP33A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP33A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD36KP33A from Microsemi is a unidirectional 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, clamps transients to ≤53.3 V at 676 A, and operates with a 33 V reverse standoff voltage (VWM), making it suitable for 24 V DC bus lightning and load-dump protection.
For engineers reviewing the MPLAD36KP33A datasheet, MPLAD36KP33A pinout, MPLAD36KP33A application, or MPLAD36KP33A equivalent, key selection criteria include its 33 V VWM rating, 53.3 V max clamping voltage at 676 A, DO-160F Waveform 4 Level 4 compliance, IEC 61000-4-5 Class 4 capability with 42 Ω source impedance, and low-profile PLAD package thermal performance.
Technical Context
The MPLAD36KP33A is a silicon avalanche diode-based TVS optimized for multi-stroke lightning immunity per RTCA DO-160 Section 22 and secondary surge suppression per IEC 61000-4-5. Its unidirectional polarity and metal-base cathode configuration enable direct thermal coupling to PCB copper or heatsinks.
It supports steady-state dissipation up to 2.5 W at 25°C ambient and derates linearly above 25°C, with junction-to-case thermal resistance of 1.0 °C/W - critical for sustained surge duty cycles in avionics power distribution units and vehicle ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Reverse Standoff) | 33 V - maximum continuous operating voltage before clamping begins; matches 24 V nominal systems with safety margin |
| V(BR) min/max | 36.7–40.6 V - breakdown initiates within this range at 5 mA, ensuring predictable turn-on behavior |
| VC @ IPP | 53.3 V max at 676 A - clamping voltage under full 10/1000 μs surge, limiting downstream voltage stress |
| PPP | 36,000 W - peak pulse power handling at 10/1000 μs, enabling single-device protection against severe transients |
| RθJC | 1.0 °C/W - enables efficient heat transfer from junction to case, supporting high-reliability thermal design |
| ID @ VWM | 10 μA max - ultra-low leakage ensures minimal standby power loss in always-on systems |
| αV(BR) | 35 mV/°C - temperature coefficient allows accurate clamping voltage prediction across -55°C to +150°C |
Pinout & Package
Package: PLAD - low-profile, void-free thermosetting epoxy body (UL94V-0), metal base cathode terminal, tin-lead or RoHS-compliant matte-tin plating, weight ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line (e.g., 24 V rail); current flows into anode during surge conduction |
| Cathode (Metal Base) | Negative return / Heat sink interface | Exposed metal underside serves as both electrical cathode and primary thermal path to PCB copper or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection surges up to 33 V VWM devices - validated for aircraft avionics I/O protection |
| IEC 61000-4-5 Class 4 (42 Ω) | Rated for 4 kV surge immunity in long-distance secondary protection configurations - meets industrial control cabinet requirements |
| Moisture Sensitivity Level 1 | No dry pack required per J-STD-020B - simplifies SMT assembly and eliminates bake-out steps |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control modules and battery management systems |
| 3σ lot norm screening on ID | Ensures consistent low-leakage performance across production lots - critical for battery-powered remote sensors |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC main bus in commercial aircraft power distribution units from lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus entry point to clamp surges before reaching upstream converters and downstream loads. Use Value: 36 kW PPP and 53.3 V clamping limit voltage overshoot to safe levels for MIL-STD-704 compliant 28 V systems. | Use Scenario: Safeguarding 24 V supply inputs of diesel engine control modules exposed to ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Primary surge clamp on battery feed line, absorbing >100 ms, 120 V transients without failure. Use Value: 676 A peak current rating and 1.0 °C/W RθJC ensure reliable operation under repeated load dump events. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Secondary protection on 30–40 V DC intermediate bus of variable-frequency drives subjected to IEC 61000-4-5 surge coupling. IC Role / Device Role / Timing Role: Fast-response TVS placed after EMI filter but before DC-link capacitor to suppress coupled common-mode surges. Use Value: 33 V VWM aligns with bus overvoltage tolerance; 53.3 V VC prevents MOSFET gate oxide overstress during surge events. | Use Scenario: Surge protection for 36 V nominal signaling power supplies in European railway EN 50121-4 compliant trackside cabinets. IC Role / Device Role / Timing Role: Class 4-compliant TVS on input stage to meet 4 kV surge immunity with 42 Ω source impedance per standard. Use Value: Validated performance at 33 V VWM enables direct replacement of legacy 36 V-rated suppressors without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | 600 W PPP, 53.3 V VC @ 12.3 A - 60× lower peak power than MPLAD36KP33A | Only suitable for low-energy ESD/EFT; cannot meet DO-160F Level 4 or IEC 61000-4-5 Class 4 | Select only for board-level ESD protection where surge energy is <10 J; not a functional substitute for high-power transients |
| SMCJ33A | 1500 W PPP, 53.3 V VC @ 28.3 A - 24× lower peak power than MPLAD36KP33A | Meets IEC 61000-4-5 Class 2 (42 Ω), but fails Class 4 and DO-160F Waveform 4 Level 4 | Acceptable for cost-sensitive industrial controls with limited surge exposure; insufficient for aviation or heavy-duty automotive |
Compared with SMBJ33A and SMCJ33A, the MPLAD36KP33A provides 60× and 24× higher peak pulse power respectively, enabling single-device compliance with RTCA DO-160F Level 4 and IEC 61000-4-5 Class 4 - eliminating need for parallel TVS arrays or hybrid protection schemes.
Availability
MPLAD36KP33A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP33A 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 MPLAD36KP33A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning immunity and automotive load-dump protection in mission-critical power systems.
FAQ
What is the clamping voltage of MPLAD36KP33A at its rated peak pulse current?
The MPLAD36KP33A has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPP) of 676 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD36KP33A maintains this clamping performance across its specified operating temperature range.
Is MPLAD36KP33A compliant with RTCA DO-160F for aircraft applications?
Yes, the MPLAD36KP33A is validated for RTCA DO-160F Section 22 lightning-induced transient susceptibility testing. Specifically, it meets Waveform 4 (6.4/69 μs) Level 4 protection requirements at 25°C ambient, as confirmed in the RF01216 datasheet. The MPLAD36KP33A's 36 kW peak pulse power and low clamping voltage make it suitable for primary or secondary protection in avionics power interfaces.
Does MPLAD36KP33A require moisture sensitivity handling prior to reflow soldering?
No, the MPLAD36KP33A is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry packing or baking. This eliminates moisture-related popcorning risks during lead-free reflow and simplifies manufacturing logistics. The MPLAD36KP33A's void-free epoxy encapsulation contributes to this robust moisture resistance.
What is the thermal resistance from junction to case for MPLAD36KP33A?
The MPLAD36KP33A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, as specified in the "MAXIMUM RATINGS" table of the RF01216 datasheet. This low value reflects its metal-base construction, which provides a direct thermal path from the silicon die to the PCB copper pour or external heatsink. Effective thermal design using this parameter ensures reliability under repetitive surge duty cycles.
Can MPLAD36KP33A be used in automotive applications requiring AEC-Q101 qualification?
Yes, the MPLAD36KP33A is tested and qualified to AEC-Q101 standards for discrete semiconductors, as stated in the "High-Reliability screening available…" section of the RF01216 datasheet. This qualification validates its suitability for automotive under-hood applications such as engine control units and battery management systems, where temperature cycling, vibration, and surge robustness are critical. The MPLAD36KP33A's qualification covers the full device family including MPLAD36KP33A.
MPLAD36KP33A 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 676A
- 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
MPLAD36KP33A FAQ
1.How can I place an order for MPLAD36KP33A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP33A 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 MPLAD36KP33A reliable?
The price and inventory of MPLAD36KP33A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP33A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP33A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP33A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP33A?
MPLAD36KP33A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP33A 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 MPLAD36KP33A?
For technical support, including MPLAD36KP33A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP33A requirements.
6.How does Aetrix verify that MPLAD36KP33A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP33A 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 MPLAD36KP33A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP33A?
All MPLAD36KP33A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP33A, 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 MPLAD36KP33A part is unused and in its original packaging.
Return procedure for MPLAD36KP33A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP33A 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…
