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Microchip Technology MAPLAD36KP90A
- Part No.:
- MAPLAD36KP90A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP90A.pdf
- Description:
- TVS DIODE 90VWM 146VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,161
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Product details
Overview
MAPLAD36KP90A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤146 V at 247 A, and operates with 90 V reverse standoff voltage (VWM), meeting RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP90A datasheet, MAPLAD36KP90A pinout, MAPLAD36KP90A application, or MAPLAD36KP90A equivalent, key selection criteria include its 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, UL94V-0 epoxy package, and verified compliance with IEC 61000-4-5 (Class 3, 42 Ω source) and IEC 61000-4-2 ESD protection.
Technical Context
The MAPLAD36KP90A employs an avalanche breakdown structure optimized for fast response (<100 ps rise time) and low clamping ratio (VC/V(BR) ≈ 1.46). Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained multi-pulse operation under ≤0.05% duty cycle per Figure 2.
It is characterized at 25°C with 5 mA breakdown current (I(BR)), 10 μA standby current (ID) at VWM, and exhibits +0.109 %/°C temperature coefficient of breakdown voltage - enabling predictable derating up to +150°C junction temperature per Figure 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced surges without failure |
| Reverse Standoff Voltage (VWM) | 90 V - maximum continuous operating voltage before conduction begins |
| Clamping Voltage (VC) | 146 V @ 247 A - limits downstream circuit voltage during worst-case surge |
| Breakdown Voltage (V(BR)) | 100–111 V @ 5 mA - defines precise avalanche onset threshold |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required prior to reflow |
| RoHS Compliance | e3 matte-tin plating - lead-free, solderable per MIL-STD-750 Method 2026 |
Pinout & Package
MAPLAD36KP90A uses a thermally enhanced PLAD surface-mount package with void-free UL94V-0 epoxy body and metal base acting as cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈ 1.8 g. Recommended pad layout per RF01216 Rev B page 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and high-current return node; must be soldered to large copper pour or heatsink |
| Top Surface Pad | Anode | Signal-side connection; carries full surge current into device during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT construction | Enables placement on compact avionics PCBs while maintaining 36 kW surge capability |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4/5 pin-injection protection (6.4/69 μs and 40/120 μs) in aircraft systems |
| IEC 61000-4-5 Class 3/4 secondary lightning protection | Meets 42 Ω and 12 Ω source impedance requirements for ground vehicle and airborne subsystems |
| AEC-Q101 qualified | Qualified for automotive underhood applications including load dump and alternator transients |
| Wafer and assembly lot traceability | Supports high-reliability programs requiring full process chain visibility and screening (MIL-PRF-19500 options available) |
Applications
| Aerospace Avionics Protection | Automotive Powertrain ECUs |
|---|---|
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 surge shunt element placed at board edge or connector interface. Use Value: Limits clamped voltage to 146 V, ensuring downstream ASICs and FPGAs remain within absolute maximum ratings during multi-stroke events. |
Use Scenario: Safeguarding engine control unit (ECU) power rails during 12 V battery load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground, absorbing >36 kW energy in <1 ms. Use Value: Prevents latch-up or destruction of MCU and CAN transceivers by clamping transients below 150 V with sub-100 ps response. |
| Railway Signaling Interfaces | Industrial Motor Drive Inputs |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers in wayside signaling cabinets from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary protection stage following gas discharge tube (GDT) front-end. Use Value: Provides low-clamp, fast-response backup protection with 10 μA leakage at 90 V, minimizing standby power impact. |
Use Scenario: Protecting variable frequency drive (VFD) control board inputs from switching transients generated by IGBT commutation. IC Role / Device Role / Timing Role: Mounted directly at terminal block entry point to divert surge energy before reaching isolation barriers. Use Value: Achieves 247 A peak pulse current handling with 1.0 °C/W thermal resistance, enabling reliable operation without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Lower PPP rating (600 W), smaller SMB package, 1.5x higher clamping ratio (VC/V(BR) ≈ 1.7) | Suitable only for single-stroke, low-energy industrial I/O - not certified for DO-160 or IEC 61000-4-5 Class 4/5 | Select SMBJ90A only for cost-sensitive non-aerospace designs where surge energy remains below 100 J. |
| SMCJ90A | Higher PPP (1500 W), same SMC package footprint, but lacks DO-160 qualification and wafer-level traceability | Acceptable for automotive infotainment or body electronics, but not for safety-critical flight systems or AEC-Q101 full-scope validation | Choose SMCJ90A when full aerospace qualification and lot traceability are not required, and 1500 W suffices. |
Compared with SMBJ90A and SMCJ90A, the MAPLAD36KP90A provides 24× higher peak power, DO-160F certification, and metal-base thermal performance - making it the sole option for multi-stroke lightning protection in certified avionics and high-reliability automotive powertrain modules.
Availability
MAPLAD36KP90A is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain ECUs, railway signaling interfaces, and industrial motor drive inputs requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP90A 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 MAPLAD36KP90A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in mission-critical systems.
FAQ
What is the clamping voltage of MAPLAD36KP90A at its rated peak pulse current?
The MAPLAD36KP90A has a maximum clamping voltage (VC) of 146 V at 247 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and ensures downstream components remain within safe operating voltage limits during surge events.
Is MAPLAD36KP90A qualified for automotive applications?
Yes, MAPLAD36KP90A is AEC-Q101 qualified and validated for automotive load dump protection (ISO 7637-2 Pulse 5a). Its 90 V VWM and 146 V clamping voltage make it suitable for 12 V system ECUs, especially in powertrain and chassis modules requiring high-reliability surge immunity.
Does MAPLAD36KP90A meet RTCA DO-160 lightning standards?
Yes, MAPLAD36KP90A is explicitly tested and compliant with RTCA DO-160 Section 22 for multi-stroke lightning, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 per MicroNote 132. Its 36 kW rating and low thermal resistance enable repeatable performance across stroke sequences.
What is the thermal resistance and recommended mounting method for MAPLAD36KP90A?
The MAPLAD36KP90A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W. The metal base serves as the cathode and primary heat path - it must be soldered to a minimum 10 cm² copper pour or attached to an external heatsink using the pad layout specified in RF01216 Rev B page 6.
How does MAPLAD36KP90A differ from bidirectional versions like MAPLAD36KP90CA?
MAPLAD36KP90A is unidirectional with cathode on the metal base, intended for DC-biased lines like power rails. MAPLAD36KP90CA is bidirectional, symmetric for AC or floating signal lines. Their VWM, VC, and PPP ratings are identical, but polarity and circuit placement differ - MAPLAD36KP90A cannot substitute for MAPLAD36KP90CA in AC-coupled applications.
MAPLAD36KP90A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 247A
- 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
MAPLAD36KP90A FAQ
1.How can I place an order for MAPLAD36KP90A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP90A 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 MAPLAD36KP90A reliable?
The price and inventory of MAPLAD36KP90A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP90A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP90A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP90A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP90A?
MAPLAD36KP90A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP90A 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 MAPLAD36KP90A?
For technical support, including MAPLAD36KP90A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP90A requirements.
6.How does Aetrix verify that MAPLAD36KP90A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP90A 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 MAPLAD36KP90A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP90A?
All MAPLAD36KP90A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP90A, 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 MAPLAD36KP90A part is unused and in its original packaging.
Return procedure for MAPLAD36KP90A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP90A Tags
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