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Microchip Technology MPLAD18KP22CA
- Part No.:
- MPLAD18KP22CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP22CA.pdf
- Description:
- TVS DIODE 22VWM 35.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,831
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Product details
Overview
MPLAD18KP22CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤35.5 V under 508 A peak impulse current, and features a 22 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (24.4–26.9 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MPLAD18KP22CA datasheet, MPLAD18KP22CA pinout, MPLAD18KP22CA application, or MPLAD18KP22CA equivalent, key selection criteria include its bidirectional polarity, 22 V working voltage, sub-100 ps response time, low thermal resistance (RθJC = 0.7 °C/W), and qualification to AEC-Q101 and MIL-PRF-19500 screening levels.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating when transient voltage exceeds its breakdown threshold (V(BR)). Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its low RθJC supports high-repetition-rate surge handling when mounted on thermally optimized PCB pads per recommended layout.
It is characterized for 10/1000 μs double-exponential waveform testing, with clamping voltage VC specified at IPP = 508 A, and exhibits a temperature coefficient of breakdown voltage (αV(BR)) of +24 mV/°C - enabling predictable derating across -55°C to +150°C operating range.
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) | 22 V - maximum continuous DC or RMS AC voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 24.4–26.9 V @ I(BR) - ensures reliable turn-on margin above VWM |
| Clamping Voltage (VC) | ≤35.5 V @ 508 A - limits downstream voltage stress during worst-case transients |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or copper pour |
| Response Time | <100 ps - reacts faster than most system-level ESD or lightning events |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - defines safe continuous bias capability outside surge events |
Pinout & Package
Surface-mount PLAD package with metal base cathode (bidirectional symmetry eliminates anode/cathode orientation constraints). Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. Void-free UL94V-0 epoxy body with matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Top Side) | Anode / Cathode (symmetrical) | Bidirectional operation: either terminal serves as anode or cathode depending on transient polarity |
| Terminal 2 (Metal Base) | Common Reference / Thermal Path | Electrically connected to both terminals internally; provides primary thermal conduction path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 25°C - required for avionics interface protection |
| AEC-Q101 qualification | Qualified for automotive underhood applications including load dump and alternator ripple immunity |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Meets secondary lightning protection thresholds across all severity classes using standard 42 Ω impedance test setup |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT manufacturing flow |
| 3σ lot norm screening on standby current (ID) | Ensures consistent leakage performance (<10 μA @ 22 V) across production lots for high-reliability systems |
Applications
| Avionics Power Input Protection | Automotive Engine Control Unit (ECU) Inputs |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight management computers against DO-160 Section 22 multi-stroke lightning surges. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector entry point to divert >10 kA transients away from downstream regulators and microcontrollers. Use Value: Enables compliance with RTCA DO-160F Waveform 4 Level 4 while maintaining <35.5 V clamping - preserving 3.3 V/5 V logic integrity. | Use Scenario: Safeguarding analog sensor inputs (e.g., MAP, TPS) on engine control units exposed to ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Parallel-connected TVS on signal lines referenced to chassis ground, absorbing 12 V system transients up to 18 kW. Use Value: Prevents latch-up or damage in precision ADC front-ends by limiting excursion to ≤35.5 V during 100 ms load dump events. |
| Railway Signaling Interface Protection | Industrial Motor Drive Gate Driver Isolation |
Use Scenario: Shielding Ethernet PHY interfaces in wayside signaling controllers from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pairs (e.g., TX+/TX−) to clamp common-mode transients without disrupting DC bias. Use Value: Maintains signal integrity under IEC 61000-4-5 Class 4 (42 Ω) testing while supporting 100 Mbps data rates due to sub-100 ps response. | Use Scenario: Protecting isolated gate driver inputs in 3-phase inverters from cross-talk and switching-induced transients. IC Role / Device Role / Timing Role: Clamp placed between isolated supply rails and gate driver enable lines to suppress 100 ns–1 μs ringing. Use Value: Eliminates false triggering of IGBTs/MOSFETs by holding gate voltage within safe range during 508 A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | 600 W PPP rating (vs. 18,000 W); same VWM and bidirectional polarity | Not suitable for DO-160F Level 4 or IEC 61000-4-5 Class 4+; limited to consumer/industrial grade surges | Select only for cost-sensitive, non-aerospace designs with <1 kA expected surge current |
| SMCJ22CA | 1500 W PPP rating; identical package outline but lower thermal mass and RθJC = 2.5 °C/W | Lacks AEC-Q101 and MIL-PRF-19500 screening; not validated for multi-stroke lightning | Acceptable for automotive infotainment or body electronics where full ECU-grade robustness is not required |
Compared with SMBJ22CA and SMCJ22CA, the MPLAD18KP22CA delivers 30× and 12× higher peak pulse power respectively, with certified aerospace-grade reliability, tighter parametric screening, and proven performance under RTCA DO-160F Waveform 4 - making it the sole option for safety-critical avionics and high-end automotive powertrain systems.
Availability
MPLAD18KP22CA is available at Aetrix Electronics and suitable for avionics power input protection, automotive ECU interface hardening, and industrial railway signaling requiring stable component supply across extended lifecycle programs.
Supply support for MPLAD18KP22CA 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, radiation-tolerant, and aerospace-qualified components.
The MPLAD series was developed specifically for high-energy transient suppression in mission-critical platforms, emphasizing thermal robustness, multi-stroke endurance, and compliance with RTCA DO-160 and IEC 61000-4-x standards.
FAQ
What is the clamping voltage specification for MPLAD18KP22CA under peak surge conditions?
The MPLAD18KP22CA has a maximum clamping voltage (VC) of 35.5 V when subjected to a 508 A peak impulse current (IPP) under 10/1000 μs waveform conditions. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during worst-case transients - critical for ensuring downstream ICs remain within absolute maximum ratings.
Does MPLAD18KP22CA require special PCB layout considerations for thermal performance?
Yes. To achieve the specified RθJC of 0.7 °C/W and sustain repeated 18,000 W surges, MPLAD18KP22CA must be mounted on the recommended pad layout per RF01215 Rev B: a minimum 10.54 mm × 12.32 mm copper area connected to internal ground/power planes via ≥4 thermal vias. Reduced copper area increases junction temperature and degrades PPP derating.
Is MPLAD18KP22CA compliant with RoHS and REACH regulations?
Yes. The MPLAD18KP22CA is RoHS compliant (e3 marking), using annealed matte-tin plating and UL94V-0 void-free epoxy encapsulation. It meets EU Directive 2011/65/EU and REACH SVHC requirements, with full material declarations available upon request through Aetrix Electronics' compliance portal.
Can MPLAD18KP22CA be used in unidirectional configurations?
No. The "CA" suffix explicitly denotes bidirectional construction. Unidirectional variants use the "A" suffix (e.g., MPLAD18KP22A). Attempting to use MPLAD18KP22CA in a unidirectional circuit does not alter its symmetrical IV characteristic - it remains bidirectional and will conduct on both polarities, which may disrupt DC-biased signal paths.
What screening options are available for MPLAD18KP22CA in high-reliability programs?
MPLAD18KP22CA supports MIL-PRF-19500 upscreening levels M, MA, MX, and MXL - including extended temperature cycling, burn-in, and 3σ lot norm screening on standby current (ID). These options are documented in the Hirel Non-Hermetic Product Portfolio and require factory coordination for quoting and lead time alignment.
MPLAD18KP22CA 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 508A
- 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
MPLAD18KP22CA FAQ
1.How can I place an order for MPLAD18KP22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP22CA 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 MPLAD18KP22CA reliable?
The price and inventory of MPLAD18KP22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP22CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP22CA?
MPLAD18KP22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP22CA 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 MPLAD18KP22CA?
For technical support, including MPLAD18KP22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP22CA requirements.
6.How does Aetrix verify that MPLAD18KP22CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP22CA 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 MPLAD18KP22CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP22CA?
All MPLAD18KP22CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP22CA, 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 MPLAD18KP22CA part is unused and in its original packaging.
Return procedure for MPLAD18KP22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP22CA Tags
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