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Microchip Technology MAPLAD36KP33CA
- Part No.:
- MAPLAD36KP33CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP33CA.pdf
- Description:
- TVS DIODE 33VWM 53.3VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,802
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Product details
Overview
MAPLAD36KP33CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps transients to ≤53.3 V at 676 A, and features a 33 V reverse standoff voltage (VWM), 36.7–40.6 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance.
For engineers reviewing the MAPLAD36KP33CA datasheet, MAPLAD36KP33CA pinout, MAPLAD36KP33CA application, or MAPLAD36KP33CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source impedances), RTCA DO-160F pin injection (Waveform 4 Level 4, Waveform 5A Level 4), and automotive load dump suppression where low-profile SMT mounting and multi-stroke reliability are critical.
Technical Context
The MAPLAD36KP33CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its metal-base thermal path supports direct heatsinking via the cathode terminal.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. The device operates across –55°C to +150°C junction temperature and maintains stable V(BR) with a ±35 mV/°C temperature coefficient, enabling predictable performance in wide-temperature avionics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation under low-duty-cycle conditions |
| Reverse Standoff Voltage (VWM) | 33 V - maximum continuous operating voltage before leakage exceeds 10 μA |
| Breakdown Voltage (V(BR)) | 36.7–40.6 V @ 5 mA - defines minimum clamping onset threshold under controlled test current |
| Max Clamping Voltage (VC) | 53.3 V @ 676 A - limits downstream circuit voltage during worst-case surge event |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink through metal base |
| Clamping Response Time | <5 ns - ensures sub-nanosecond turn-on for fast-rising transients like ESD or lightning-induced spikes |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow soldering |
Pinout & Package
MAPLAD36KP33CA uses a thermally enhanced surface-mount PLAD package with a void-free UL94V-0 epoxy body and tin-plated terminals. The metal base serves as the cathode for unidirectional variants; for bidirectional devices like MAPLAD36KP33CA, both terminals are symmetrical and non-polarized - polarity marking is omitted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 2; no polarity - connects to protected line or ground reference point |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path between two nodes |
| Metal Base | Thermal Interface / Electrical Terminal | Provides low-resistance thermal path to PCB copper pour; electrically connected to both terminals in bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC signals, differential buses, or floating references without polarity constraints |
| 36 kW peak pulse rating at 10/1000 μs | Meets RTCA DO-160 Section 22 multi-stroke lightning requirements for aircraft electronics |
| 1.0 °C/W RθJC | Supports sustained surge duty cycles when mounted on ≥2 oz copper with thermal vias to internal planes |
| AEC-Q101 qualified | Validated for automotive under-hood applications including load dump and ISO 7637-2 compliance |
| IEC 61000-4-2/4-4/4-5 certified | Guarantees ESD, EFT, and surge immunity in industrial control and avionics subsystems |
Applications
| Aircraft Lightning Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting avionics data buses (ARINC 429, MIL-STD-1553) from induced surges during in-flight lightning strikes. IC Role / Device Role / Timing Role: Secondary TVS placed at connector interface to clamp transients before they reach sensitive receivers. Use Value: Meets RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) and Waveform 5A Level 4 (40/120 μs) with verified multi-stroke endurance. | Use Scenario: Safeguarding engine control unit (ECU) power inputs during alternator field collapse events. IC Role / Device Role / Timing Role: High-power shunt device absorbing up to 36 kW surge energy while limiting bus voltage to ≤53.3 V. Use Value: Survives repeated 12 V system load dump pulses per ISO 7637-2 Pulse 5a/b without parameter shift or failure. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding encoder feedback lines and analog sensor inputs in variable-frequency drives exposed to switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS bridging signal pair to chassis ground, suppressing common-mode RFI and EFT bursts. Use Value: Clamps induced transients to <53.3 V within <5 ns, preserving signal integrity for 1 MHz encoder signals. | Use Scenario: Securing track-side signaling circuits against induced surges from nearby traction currents or lightning coupling. IC Role / Device Role / Timing Role: Primary surge limiter on 24 V DC signaling lines interfacing with centralized interlocking systems. Use Value: Certified for IEC 61000-4-5 Class 4 (42 Ω source) up to 33 V working voltage, ensuring fail-safe operation. |
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, SMB package, 12.5 °C/W RθJA, 53.3 V VC @ 9.8 A | Lower energy handling; suitable only for single-event ESD/EFT, not multi-stroke lightning | Select SMBJ33CA only for cost-sensitive consumer-grade interfaces with <1 kA surge exposure. |
| SMCJ33CA | 1500 W PPP rating, SMC package, 3.5 °C/W RθJA, 53.3 V VC @ 28.3 A | Lacks RTCA DO-160F qualification and AEC-Q101 validation; limited thermal robustness | Choose SMCJ33CA for industrial PLC I/O where full aerospace/automotive certification is not required. |
Compared with SMBJ33CA and SMCJ33CA, MAPLAD36KP33CA provides 24× and 24× higher peak pulse power respectively, validated multi-stroke endurance, and traceable lot-level screening - making it the only option for certified aviation and high-reliability automotive power rail protection.
Availability
MAPLAD36KP33CA is available at Aetrix Electronics and suitable for aircraft lightning protection, automotive load dump suppression, and industrial motor drive I/O protection requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP33CA 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 semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and ruggedized discrete components.
The MAPLAD36KP33CA belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for certified secondary lightning protection and multi-stroke surge resilience in mission-critical platforms.
FAQ
What is the clamping voltage of MAPLAD36KP33CA at its rated peak pulse current?
The MAPLAD36KP33CA has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current of 676 A under 10/1000 μs waveform conditions. This value is measured across the device terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The MAPLAD36KP33CA maintains this clamping performance consistently across its operational temperature range.
Is MAPLAD36KP33CA qualified for automotive applications?
Yes, MAPLAD36KP33CA is tested and qualified to AEC-Q101 standards for stress reliability, including high-temperature operating life, temperature cycling, and surge robustness. It is explicitly rated for automotive load dump protection per ISO 7637-2 Pulse 5a/b and supports under-hood deployment up to +150°C junction temperature. The MAPLAD36KP33CA also offers optional MIL-PRF-19500 upscreening for enhanced lot traceability and screening.
Does MAPLAD36KP33CA require special PCB layout considerations?
Yes, MAPLAD36KP36KP33CA requires a dedicated thermal pad layout per Microsemi's recommended footprint: 0.470″ × 0.230″ (11.94 mm × 5.85 mm) copper area with ≥6 thermal vias (0.013″ diameter) connecting to inner ground/power planes. This layout achieves the specified 1.0 °C/W junction-to-case thermal resistance. Failure to implement this pad design will degrade surge endurance and increase clamping voltage drift under repeated stress.
How does MAPLAD36KP33CA meet RTCA DO-160 lightning requirements?
MAPLAD36KP33CA meets RTCA DO-160 Section 22 multi-stroke lightning standards by delivering 36,000 W peak pulse power at 10/1000 μs and passing Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 testing. Its bidirectional symmetry, low clamping time (<5 ns), and validated thermal recovery enable reliable performance across multiple sequential strokes - a requirement for certified aircraft electronics interfaces.
What is the moisture sensitivity level (MSL) of MAPLAD36KP33CA?
MAPLAD36KP33CA is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. This eliminates moisture-related popcorning risk during assembly and simplifies manufacturing logistics for high-reliability production lines. The MAPLAD36KP33CA's void-free UL94V-0 epoxy encapsulation contributes directly to this robust MSL classification.
MAPLAD36KP33CA 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):
- 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
MAPLAD36KP33CA FAQ
1.How can I place an order for MAPLAD36KP33CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP33CA 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 MAPLAD36KP33CA reliable?
The price and inventory of MAPLAD36KP33CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP33CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP33CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP33CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP33CA?
MAPLAD36KP33CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP33CA 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 MAPLAD36KP33CA?
For technical support, including MAPLAD36KP33CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP33CA requirements.
6.How does Aetrix verify that MAPLAD36KP33CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP33CA 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 MAPLAD36KP33CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP33CA?
All MAPLAD36KP33CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP33CA, 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 MAPLAD36KP33CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP33CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP33CA Tags
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