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Microchip Technology MPLAD18KP7.5CA
- Part No.:
- MPLAD18KP7.5CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP7.5CA.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,822
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Product details
Overview
MPLAD18KP7.5CA 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 7.5 V reverse standoff voltage (VWM), clamps to ≤12.9 V at 1396 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD18KP7.5CA datasheet, MPLAD18KP7.5CA pinout, MPLAD18KP7.5CA application, or MPLAD18KP7.5CA equivalent, key selection criteria include its bidirectional polarity, low thermal resistance (RθJC = 0.7 °C/W), IEC 61000-4-5 Class 1–5 secondary lightning compliance, RTCA/DO-160F Waveform 4 Level 4 capability, and RoHS-compliant e3 plating.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating when transient voltage exceeds its breakdown threshold (V(BR) = 8.33–9.21 V). Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained energy dissipation under repetitive surges at ≤0.05% duty factor.
It complies with AEC-Q101 stress testing and supports MIL-PRF-19500 upscreening options. The bidirectional construction allows symmetrical clamping for AC-coupled or floating signal lines, while its <5 ns response time ensures protection against fast-rising transients including ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 7.5 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 8.33–9.21 V @ I(BR) - precise activation threshold for predictable clamping onset |
| Clamping Voltage (VC) | ≤12.9 V @ IPP = 1396 A - limits downstream voltage stress during worst-case surge |
| Peak Impulse Current (IPP) | 1396 A @ 10/1000 μs - quantifies maximum surge current it can safely divert |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Temperature Coefficient (αV(BR)) | +6.0 mV/°C - ensures stable clamping voltage across -55°C to +150°C operating range |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base acting as cathode terminal for unidirectional variants; for bidirectional MPLAD18KP7.5CA, both terminals are symmetrical and non-polarized. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. UL94V-0 epoxy body with annealed matte-tin (e3) RoHS-compliant plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Surge current path input/output | Bidirectional conduction - either terminal accepts transient polarity; no orientation required on PCB |
| Metal base (bottom side) | Thermal interface & electrical connection | Provides low-inductance, low-resistance path to ground plane or heatsink; critical for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC signals, differential buses, or floating nodes without polarity constraints |
| 18 kW peak pulse rating | Meets RTCA DO-160 Section 22 multi-stroke lightning test requirements for avionics |
| 0.7 °C/W junction-to-case thermal resistance | Supports high-repetition-rate surges by minimizing thermal accumulation during burst events |
| IEC 61000-4-5 compliance (42 Ω, 12 Ω, 2 Ω source) | Validated for Class 1–5 secondary lightning protection across multiple impedance conditions |
| RTCA/DO-160F Waveform 4 Level 4 support | Withstands 6.4/69 μs pin-injection transients at full rated voltage up to 25°C |
Applications
| Aerospace Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus in flight control computers from induced lightning transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS placed across main power rail to clamp surges before they reach DC/DC converters and FPGAs. Use Value: 1396 A IPP and 12.9 V clamping limit voltage stress on 3.3 V and 5 V logic supplies downstream. | Use Scenario: Safeguarding infotainment head units during alternator load dump events in 12 V vehicle systems. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing >1000 V, 100 ms transients generated when battery disconnects under load. Use Value: 18,000 W PPP rating handles sustained energy without thermal runaway, unlike lower-power TVS arrays. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding RS-485 communication ports on PLC modules from switching transients in adjacent motor circuits. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to suppress common-mode surges induced by variable-frequency drives. Use Value: Symmetrical clamping ensures equal protection for both A and B lines without biasing concerns. | Use Scenario: Securing track-side signaling inputs against lightning-induced surges in EN 50121-4 compliant railway electronics. IC Role / Device Role / Timing Role: Primary protection stage before gas discharge tube (GDT) secondary stage in cascaded architecture. Use Value: Fast <5 ns response captures initial surge edge before GDT fires, reducing let-through energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | 600 W PPP rating, SMB package, RθJC ≈ 15 °C/W | Not suitable for DO-160 lightning-level surges; limited to board-level ESD/EFT | Select only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ7.5CA | 1500 W PPP rating, SMC package, RθJC ≈ 3.5 °C/W | Lacks RTCA DO-160 qualification; insufficient for multi-stroke lightning testing | Acceptable for automotive load dump if peak current ≤200 A and repetition rate is low |
Compared with SMBJ7.5CA and SMCJ7.5CA, the MPLAD18KP7.5CA provides over 30× higher peak power handling, 5× lower thermal resistance, and formal DO-160/IEC 61000-4-5 certification-making it the only viable option for certified aerospace and high-reliability industrial surge protection.
Availability
MPLAD18KP7.5CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain ECUs, and industrial motor drive designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MPLAD18KP7.5CA 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.
The MPLAD18KP7.5CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical systems where standard TVS diodes fail to meet energy or qualification requirements.
FAQ
What is the clamping voltage of MPLAD18KP7.5CA at its rated peak impulse current?
The MPLAD18KP7.5CA has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak impulse current (IPP) of 1396 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 a full-rated surge event. The MPLAD18KP7.5CA maintains this clamping performance across its full operating temperature range.
Does MPLAD18KP7.5CA require orientation during PCB placement?
No, the MPLAD18KP7.5CA does not require specific orientation because it is a bidirectional TVS diode. Its symmetrical construction means either terminal may connect to either side of the protected line, eliminating polarity concerns during layout and assembly. This simplifies routing for differential interfaces and AC-coupled signals. The MPLAD18KP7.5CA's metal base serves only as a thermal interface-not a polarized electrode-further confirming its non-directional behavior.
Is MPLAD18KP7.5CA qualified to RTCA DO-160 Section 22?
Yes, the MPLAD18KP7.5CA is explicitly rated for RTCA DO-160 Section 22 multi-stroke lightning testing, as confirmed in the official Microsemi datasheet RF01215 Rev B. It achieves Level 4 protection for Waveform 4 (6.4/69 μs) and is validated for repeated surge exposure without degradation. This qualification makes the MPLAD18KP7.5CA suitable for primary or secondary surge protection in certified avionics hardware where compliance is mandatory.
What is the thermal resistance from junction to case for MPLAD18KP7.5CA?
The junction-to-case thermal resistance (RθJC) of the MPLAD18KP7.5CA is 0.7 °C/W, measured under specified mounting conditions on FR4 with recommended pad layout. This ultra-low value enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink, allowing the MPLAD18KP7.5CA to sustain high-energy surges without thermal runaway-even under repetitive 0.05% duty cycle conditions.
Can MPLAD18KP7.5CA be used in automotive load dump protection?
Yes, the MPLAD18KP7.5CA is suitable for automotive load dump protection, particularly in 12 V systems where ISO 7637-2 Pulse 5a/b (up to 120 V, 400 ms) must be suppressed. Its 7.5 V VWM aligns with nominal 12 V bus operation, and its 18,000 W PPP rating exceeds typical load dump energy requirements. The MPLAD18KP7.5CA also meets AEC-Q101 stress testing, confirming robustness for under-hood automotive environments.
MPLAD18KP7.5CA 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 1396A (1.396kA)
- 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
MPLAD18KP7.5CA FAQ
1.How can I place an order for MPLAD18KP7.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP7.5CA 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 MPLAD18KP7.5CA reliable?
The price and inventory of MPLAD18KP7.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP7.5CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP7.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP7.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP7.5CA?
MPLAD18KP7.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP7.5CA 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 MPLAD18KP7.5CA?
For technical support, including MPLAD18KP7.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP7.5CA requirements.
6.How does Aetrix verify that MPLAD18KP7.5CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP7.5CA 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 MPLAD18KP7.5CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP7.5CA?
All MPLAD18KP7.5CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP7.5CA, 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 MPLAD18KP7.5CA part is unused and in its original packaging.
Return procedure for MPLAD18KP7.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP7.5CA Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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