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Microchip Technology MPLAD36KP30CA
- Part No.:
- MPLAD36KP30CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP30CA.pdf
- Description:
- TVS DIODE 30VWM 48.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,575
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Product details
Overview
MPLAD36KP30CA 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, clamps transients to ≤48.8 V at 738 A, and features a 30 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 (short distance) with 42 Ω source impedance.
For engineers reviewing the MPLAD36KP30CA datasheet, MPLAD36KP30CA pinout, MPLAD36KP30CA application, or MPLAD36KP30CA equivalent, key selection criteria include its bidirectional polarity, low thermal resistance (RθJC = 1.0 °C/W), RoHS-compliant e3 plating, and validated performance under RTCA/DO-160F Waveform 4 Level 4 and Waveform 5A Level 4 pin injection tests.
Technical Context
The MPLAD36KP30CA employs an avalanche breakdown mechanism to clamp fast-rising transients, with breakdown voltage V(BR) specified at 33.3–36.8 V @ 5 mA. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating bus lines, and it supports steady-state power dissipation of 2.5 W at 25°C ambient or 71 W when case temperature is maintained at 100°C via heatsinking.
Thermal design is enabled by direct metal-base cathode contact (per package marking), minimizing junction-to-case resistance. The device is surge-tested per AEC-Q101 and qualified for high-reliability applications with optional MIL-PRF-19500 upscreening, including 3σ lot norm screening on standby current (ID ≤ 10 μA @ VWM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-event lightning-induced surges without failure |
| Reverse Standoff Voltage (VWM) | 30 V - maximum continuous operating voltage before clamping initiates |
| Clamping Voltage (VC) | 48.8 V @ 738 A - limits downstream circuit voltage during worst-case surge |
| Breakdown Voltage (VBR) | 33.3–36.8 V @ 5 mA - defines precise avalanche onset threshold |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Current (ID) | ≤10 μA @ 30 V - ensures negligible leakage in powered-off or standby states |
| Package Polarity | Bidirectional (CA suffix) - symmetric clamping for AC signals or ungrounded buses |
Pinout & Package
Surface-mount PLAD package with metal base cathode terminal (exposed bottom side); no discrete pins - two solder terminals: anode (top metallization) and cathode (bottom metal base). Thermal path optimized through direct cathode-to-PCB interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Top-side metallized pad | Connects to protected line; forms one side of bidirectional avalanche junction |
| Cathode | Exposed metal base (bottom) | Primary thermal path to PCB; must be soldered to large copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of floating differential buses (e.g., RS-485, CAN FD) without ground reference dependency |
| 1.0 °C/W RθJC | Allows >70 W steady-state dissipation with active case cooling - supports hybrid surge + DC bias operation |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 300 V standoff - critical for avionics I/O protection |
| AEC-Q101 qualification | Confirms robustness for automotive load-dump and alternator-spike environments across -55°C to +150°C |
| e3 RoHS-compliant matte-tin plating | Ensures reliable solderability per MIL-STD-750 Method 2026 and eliminates lead-based assembly constraints |
Applications
| Aerospace Avionics I/O Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs in flight control computers against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary bidirectional TVS placed directly at connector entry point to shunt energy before signal conditioning circuitry. Use Value: Clamps 36 kW surges while maintaining <48.8 V clamping level - preserves integrity of 3.3 V/5 V logic interfaces downstream. | Use Scenario: Safeguarding 12 V battery-fed ECUs (e.g., body control modules) from ISO 7637-2 load dump spikes and alternator ripple. IC Role / Device Role / Timing Role: High-power secondary surge protector mounted on main power rail after primary fuse and upstream filter. Use Value: Withstands 738 A peak current and 30 V standoff - matches nominal vehicle electrical system while surviving 120 V/400 ms transients. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Suppressing commutation-induced transients on 24–48 V DC bus rails in servo drives and PLC power supplies. IC Role / Device Role / Timing Role: Bidirectional TVS placed across bus rails to clamp both positive and negative polarity switching spikes. Use Value: 36 kW rating handles repetitive IGBT turn-off energy; low RθJC prevents thermal runaway during burst-mode operation. | Use Scenario: Protecting trackside signaling equipment (e.g., axle counters, interlocking relays) from induced surges due to nearby traction currents. IC Role / Device Role / Timing Role: Secondary lightning protection stage compliant with EN 50121-4, installed between isolation barrier and field wiring. Use Value: Validated for IEC 61000-4-5 Class 5 (42 Ω) - provides certified immunity margin for safety-critical railway infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | 600 W PPP rating, SMC package, 33 V VWM, 53.3 V VC @ 11.3 A | Limited to low-energy ESD/EFT; insufficient for DO-160 lightning or load dump | Select only for cost-sensitive consumer-grade designs where surge energy <100 J |
| SMCJ33CA | 1500 W PPP rating, SMC package, 33 V VWM, 53.3 V VC @ 28.3 A | Supports basic IEC 61000-4-5 Class 3 but not Class 5 or DO-160F Level 4/5 | Use where board space allows larger SMC footprint and energy demands are ≤1.5 kW |
Compared with SMBJ33CA and SMCJ33CA, the MPLAD36KP30CA delivers 24× and 24× higher peak pulse power respectively, enabling single-device protection against aircraft lightning and automotive load dump - eliminating cascaded TVS stages and reducing BOM count and layout area.
Availability
MPLAD36KP30CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive power distribution, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP30CA 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, timing, and power solutions for aerospace, defense, and industrial markets.
The MPLAD series was engineered specifically for high-energy transient suppression in mission-critical platforms, emphasizing thermal robustness, DO-160 compliance, and AEC-Q101 qualification - targeting avionics, rail, and heavy-vehicle electronics.
FAQ
What is the clamping voltage of the MPLAD36KP30CA at its rated peak pulse current?
The MPLAD36KP30CA has a maximum clamping voltage (VC) of 48.8 V at its rated peak pulse current (IPP) of 738 A under 10/1000 μs waveform conditions. This value is guaranteed across temperature and lot variations per the RF01216 Rev B datasheet, ensuring predictable overvoltage limiting for downstream 3.3 V or 5 V circuitry.
Is the MPLAD36KP30CA suitable for automotive load dump protection per ISO 7637-2?
Yes, the MPLAD36KP30CA is qualified to AEC-Q101 and rated for 36 kW peak pulse power, making it suitable for protecting automotive ECUs against severe load dump transients (e.g., 120 V/400 ms). Its 30 V VWM aligns with 12 V system nominal voltage, and its 48.8 V clamping level safeguards downstream components within safe operating margins.
Does the MPLAD36KP30CA require a heatsink for continuous operation?
The MPLAD36KP30CA does not require an external heatsink for single-pulse surge events, but for sustained or repetitive surges, thermal management is essential. With RθJC = 1.0 °C/W and PD = 71 W at TC = 100°C, effective PCB copper pour or thermal vias beneath the cathode base are mandatory to maintain junction temperature below 150°C.
How is polarity identified on the MPLAD36KP30CA package?
The MPLAD36KP30CA is bidirectional (denoted by "CA" suffix), so polarity marking is not required for functional operation. However, per datasheet note, the cathode is the metal base (bottom side), and the anode is the top metallized pad. For thermal optimization, the cathode must be soldered to a thermally conductive PCB layer.
What standards does the MPLAD36KP30CA meet for lightning protection?
The MPLAD36KP30CA meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 5 (with 42 Ω source impedance, short distance) for secondary lightning protection. It also complies with pin injection testing per DO-160F Waveform 4 Level 4 (6.4/69 μs) and Waveform 5A Level 4 (40/120 μs).
MPLAD36KP30CA 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.8V
- Current - Peak Pulse (10/1000µs):
- 738A
- 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
MPLAD36KP30CA FAQ
1.How can I place an order for MPLAD36KP30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP30CA 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 MPLAD36KP30CA reliable?
The price and inventory of MPLAD36KP30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP30CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP30CA?
MPLAD36KP30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP30CA 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 MPLAD36KP30CA?
For technical support, including MPLAD36KP30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP30CA requirements.
6.How does Aetrix verify that MPLAD36KP30CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP30CA 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 MPLAD36KP30CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP30CA?
All MPLAD36KP30CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP30CA, 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 MPLAD36KP30CA part is unused and in its original packaging.
Return procedure for MPLAD36KP30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP30CA Tags
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