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Microchip Technology MPLAD18KP30CAE3
- Part No.:
- MPLAD18KP30CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP30CAE3.pdf
- Description:
- TVS DIODE 30VWM 48.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,822
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Product details
Overview
MPLAD18KP30CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 30 V reverse standoff voltage (VWM), clamps to ≤48.4 V at 372 A peak impulse current (IPP), and meets RTCA DO-160F Level 4 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning standards.
For engineers reviewing the MPLAD18KP30CAE3 datasheet, MPLAD18KP30CAE3 pinout, MPLAD18KP30CAE3 application, or MPLAD18KP30CAE3 equivalent, key selection criteria include bidirectional polarity, 30 V working voltage compatibility with 24 V DC systems, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant e3 plating, and qualification per AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
This device operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown behavior to clamp transients within nanoseconds. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its metal-base cathode configuration provides direct thermal path to PCB copper or heatsink.
Designed for multi-stroke lightning compliance (RTCA DO-160 Section 22), it sustains repetitive surges at ≤0.05% duty factor without degradation. Thermal performance is validated on FR4 with recommended pad layout, achieving RθJA = 50 °C/W and enabling stable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - supports high-energy lightning and load dump events without failure |
| Reverse Standoff Voltage (VWM) | 30 V - matches nominal 24 V DC systems while allowing margin for ripple and tolerance |
| Clamping Voltage (VC @ IPP) | 48.4 V max @ 372 A - ensures downstream ICs rated to 50 V remain protected during surge |
| Breakdown Voltage (V(BR)) | 33.3–36.8 V @ I(BR) - defines precise avalanche onset threshold for predictable clamping |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer from junction to case/mounting surface |
| Steady-State Power (PD) | 2.5 W @ TA = 25°C - supports continuous bias or leakage management in always-on circuits |
| Temperature Range | −55°C to +150°C - qualified for extended industrial and aerospace environments |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode terminal. Void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Side) | Positive transient return path | Connected to protected line; conducts during positive half-cycle of bidirectional surge |
| Cathode (Metal Base) | Common reference / thermal path | Mounted directly to PCB copper pour or heatsink; serves as primary thermal conduction surface and circuit ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of AC-coupled buses (e.g., RS-485, CAN FD) without polarity concerns |
| Low RθJC (0.7 °C/W) | Supports high-repetition-rate surges by minimizing junction temperature rise per event |
| AEC-Q101 qualification | Validates reliability for automotive under-hood and powertrain applications |
| RTCA DO-160F Waveform 4 Level 4 compliance | Meets stringent aircraft pin-injection immunity requirements (6.4/69 μs, 25°C) |
| MIL-PRF-19500 upscreening option | Enables high-reliability variants with lot traceability and 3σ ID screening for defense programs |
Applications
| Aerospace Avionics Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs in flight control units against lightning-induced transients. IC Role / Device Role / Timing Role: Primary surge shunt element placed at connector interface to divert >10 kA surges before reaching FPGA or ADC front-end. Use Value: Meets RTCA DO-160 Section 22 multi-stroke lightning standard with <100 ps response time, preserving signal integrity. | Use Scenario: Safeguarding 24 V battery-fed ECUs (e.g., ABS, ADAS domain controllers) from load dump spikes up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS across power rail and chassis ground to clamp both positive and negative transients during alternator regulation failure. Use Value: Sustains 18 kW pulses without degradation, enabling AEC-Q101-compliant design for ISO 16750-2 load dump Category C. |
| Industrial Motor Drive I/O | Railway Signaling Interface |
Use Scenario: Shielding encoder feedback lines and analog current loops in servo drives exposed to switching noise and EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential pairs to suppress fast-rising EFT (IEC 61000-4-4) without distorting position signals. Use Value: Clamps sub-100 ns transients to <50 V while maintaining signal fidelity-critical for ±10 V analog and 1 Vpp encoder outputs. | Use Scenario: Protecting track-side signaling relays and communication ports (e.g., MVB, Profibus) from induced surges during lightning strikes near rail infrastructure. IC Role / Device Role / Timing Role: Secondary lightning protector per IEC 61000-4-5 with 42 Ω source impedance, installed after primary gas discharge tube. Use Value: Delivers Class 5 immunity (4 kV) in 2 Ω/12 Ω/42 Ω configurations, ensuring EN 50121-3-2 compliance for rolling stock electronics. |
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, 33 V VWM, SMA package, RθJC ≈ 15 °C/W | Limited to single-stroke or low-duty-cycle surges; unsuitable for DO-160 multi-stroke validation | Select only for cost-sensitive consumer-grade designs where 18 kW capability is unnecessary |
| SMCJ33CA | 1500 W PPP rating, 33 V VWM, SMC package, RθJC ≈ 3.5 °C/W | Cannot meet RTCA DO-160 Level 4 pin injection or IEC 61000-4-5 Class 4/5 without parallel staging | Consider for mid-power industrial controls where footprint constraints preclude PLAD but 18 kW is not required |
Compared with SMBJ33CA and SMCJ33CA, the MPLAD18KP30CAE3 delivers over 30× higher peak pulse power and 10× lower thermal resistance-enabling single-device compliance with aviation and heavy-duty automotive surge standards where staged protection adds cost and board space.
Availability
MPLAD18KP30CAE3 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 sourcing for safety-critical systems.
Supply support for MPLAD18KP30CAE3 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 MPLAD series was developed to address demanding transient protection requirements in certified aircraft systems and mission-critical automotive electronics, emphasizing multi-stroke survivability, thermal robustness, and qualification-grade traceability.
FAQ
What does the 'CA' suffix indicate in MPLAD18KP30CAE3?
The 'CA' suffix in MPLAD18KP30CAE3 denotes bidirectional polarity-meaning the device provides symmetrical clamping for both positive and negative transients. This is essential for protecting AC-coupled interfaces like RS-485 or isolated sensor lines where voltage polarity reverses. The 'E3' suffix confirms RoHS-compliant matte-tin plating per J-STD-020B Level 1 moisture sensitivity.
How does MPLAD18KP30CAE3 achieve compliance with RTCA DO-160F Section 22?
MPLAD18KP30CAE3 achieves RTCA DO-160F Section 22 compliance through verified multi-stroke lightning performance: it withstands repeated 10/1000 μs surges at 18,000 W with ≤0.05% duty factor, validated per waveform definitions in Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). Its low RθJC (0.7 °C/W) prevents thermal runaway during sequential strikes.
Can MPLAD18KP30CAE3 be used in place of unidirectional TVS diodes like MPLAD18KP30AE3?
No-MPLAD18KP30CAE3 is strictly bidirectional and must not replace unidirectional variants such as MPLAD18KP30AE3 in DC-biased circuits. In a 24 V system with grounded return, using the bidirectional version may allow reverse leakage or unintended conduction during normal operation. Always match polarity suffix (A vs. CA) to circuit topology and bias conditions.
What is the significance of the metal base cathode in MPLAD18KP30CAE3's package?
The metal base cathode in MPLAD18KP30CAE3 serves dual functions: it forms the primary thermal conduction path from junction to PCB copper pour or heatsink (enabling RθJC = 0.7 °C/W), and acts as the common reference node for bidirectional clamping. Mounting this surface to a large thermal pad is mandatory to sustain 18,000 W pulses-failure to do so risks junction overheating and parametric shift.
Does MPLAD18KP30CAE3 require derating for elevated ambient temperatures?
Yes-MPLAD18KP30CAE3 requires derating per Figure 3 in RF01215 Rev B. At 100°C case temperature, its steady-state power dissipation drops from 2.5 W (at 25°C) to 71 W, and peak pulse power must be reduced proportionally when ambient exceeds 25°C or when multiple surges occur in rapid succession. Derating curves are provided for both PPP and PD to ensure safe operation across full −55°C to +150°C junction range.
MPLAD18KP30CAE3 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:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 372A
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MPLAD18KP30CAE3 FAQ
1.How can I place an order for MPLAD18KP30CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP30CAE3 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 MPLAD18KP30CAE3 reliable?
The price and inventory of MPLAD18KP30CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP30CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP30CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP30CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP30CAE3?
MPLAD18KP30CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP30CAE3 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 MPLAD18KP30CAE3?
For technical support, including MPLAD18KP30CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP30CAE3 requirements.
6.How does Aetrix verify that MPLAD18KP30CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP30CAE3 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 MPLAD18KP30CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP30CAE3?
All MPLAD18KP30CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP30CAE3, 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 MPLAD18KP30CAE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP30CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP30CAE3 Tags
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