My Inquiry
My Account
Microchip Technology MAPLAD36KP85A
- Part No.:
- MAPLAD36KP85A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP85A.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD36KP85A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, features 85 V reverse standoff voltage (VWM), clamps to ≤137 V at 263 A peak pulse current (IPP), and operates across –55°C to +150°C. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP85A datasheet, MAPLAD36KP85A pinout, MAPLAD36KP85A application, or MAPLAD36KP85A equivalent, this device is selected for high-reliability secondary lightning protection, load dump suppression, and ESD/EFT hardening where low thermal resistance, RoHS-compliant packaging, and traceable lot screening are required.
Technical Context
The MAPLAD36KP85A is a silicon avalanche diode TVS optimized for fast response (<100 ps rise time) and high-energy dissipation in compact surface-mount form. Its metal-base cathode construction minimizes junction-to-case thermal resistance (RθJC = 1.0 °C/W), enabling effective heat transfer to PCB copper pads or heatsinks under repetitive surge conditions.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning surge) when configured with 42 Ω, 12 Ω, or 2 Ω source impedance - supporting Class 1–5 protection levels per RTCA/DO-160F Waveform 4 and 5A testing protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced transients without cascading failure |
| Reverse Standoff Voltage (VWM) | 85 V - sets maximum continuous operating voltage; must exceed system's peak DC or AC waveform |
| Clamping Voltage (VC) | ≤137 V @ IPP = 263 A - defines worst-case voltage seen by protected circuit during full-rated surge |
| Breakdown Voltage (V(BR)) | 94.4–104.0 V @ 5 mA - ensures reliable avalanche conduction onset above VWM with margin |
| Junction-to-Ambient RθJA | 50 °C/W (on FR4 with recommended pad) - determines safe steady-state derating and thermal layout requirements |
| Steady-State Power (PD) | 2.5 W @ TA = 25°C - limits continuous leakage-related heating; requires thermal management above ambient |
| Temperature Range | –55°C to +150°C - supports operation in engine bays, avionics bays, and industrial enclosures without derating |
Pinout & Package
MAPLAD36KP85A uses the PLAD surface-mount package: void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm), tin-lead or RoHS-compliant matte-tin terminals, and cathode on the metal base (bottom side). Polarity marking appears only on unidirectional versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Transient current entry point (unidirectional) | Connected to line/pin being protected; conducts surge current toward cathode during overvoltage |
| Cathode (metal base) | Transient current return path | Must be soldered to large copper pour or heatsink for thermal and electrical performance; defines polarity orientation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT PLAD package | Enables high-power surge protection in space-constrained PCB layouts without through-hole mounting |
| 3σ lot norm screening on ID | Ensures consistent standby leakage across production lots, critical for low-power or battery-backed systems |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring military-grade screening (M, MA, MX, MXL levels) |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT assembly logistics |
| AEC-Q101 qualification | Validates robustness for automotive electronics subjected to temperature cycling, mechanical shock, and humidity |
Applications
| Aerospace Avionics Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs in commercial aircraft against RTCA DO-160 Section 22 multi-stroke lightning events. IC Role / Device Role / Timing Role: Primary clamping element placed at connector interface to shunt induced surges before reaching FPGA or ADC inputs. Use Value: Delivers 36 kW pulse handling with <100 ps response, meeting Level 5 Waveform 4 immunity without adding series impedance or signal distortion. | Use Scenario: Safeguarding infotainment head units and ADAS ECUs during 12 V battery disconnect events generating >120 V transients. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly across power rail input to clamp load dump spikes within 137 V ceiling. Use Value: Withstands 263 A peak current at 85 V standoff, eliminating need for external series resistors or redundant devices in compact modules. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Hardening |
Use Scenario: Shielding encoder feedback lines and analog sensor inputs in variable-frequency drives exposed to switching noise and ground bounce. IC Role / Device Role / Timing Role: Point-of-entry TVS on differential pair terminations to suppress common-mode EFT bursts per IEC 61000-4-4 Level 4. Use Value: Clamps to ≤137 V while maintaining sub-10 μA standby current at 85 V, preserving signal integrity and minimizing offset drift. | Use Scenario: Securing Ethernet PHY and RS-485 interfaces in track-side signaling controllers subjected to induced lightning surges via long cable runs. IC Role / Device Role / Timing Role: Secondary protection stage downstream of gas discharge tube (GDT), absorbing residual energy after primary diversion. Use Value: Rated for IEC 61000-4-5 Class 4 with 2 Ω source impedance, enabling coordinated protection with GDTs for >10 kA system-level immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | 600 W PPP rating, SMB package, 1.5× higher RθJA (75 °C/W), lower IPP (100 A) | Suitable for consumer-grade or non-safety-critical 85 V rail protection; lacks DO-160/IEC 61000-4-5 Class 4/5 validation | Select SMBJ85A only for cost-sensitive, low-energy environments where 36 kW capability is unnecessary |
| SMCJ85A | 1500 W PPP, SMC package, RθJA ≈ 35 °C/W, IPP = 210 A, no AEC-Q101 or DO-160 certification | Applicable for industrial control panels with moderate surge exposure; not rated for aerospace multi-stroke or automotive load dump compliance | Choose SMCJ85A for mid-tier reliability needs where full MAPLAD36KP85A performance and qualification are not mandated |
Compared with SMBJ85A and SMCJ85A, MAPLAD36KP85A provides 24× and 24× higher peak pulse power respectively, validated AEC-Q101 and RTCA DO-160 compliance, and metal-base thermal design enabling sustained multi-pulse operation - making it irreplaceable in certified aerospace and high-end automotive systems.
Availability
MAPLAD36KP85A 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 support, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP85A 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 (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 MAPLAD36KP85A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load dump protection in safety-critical platforms where thermal robustness, lot traceability, and standards compliance are mandatory.
FAQ
What is the clamping voltage of MAPLAD36KP85A at its rated peak pulse current?
The MAPLAD36KP85A has a maximum clamping voltage (VC) of 137 V at its rated peak pulse current (IPP) of 263 A under 10/1000 μs waveform conditions. This value is guaranteed across temperature and represents the upper limit of voltage imposed on the protected circuit during full-rated surge events, ensuring downstream components remain within safe operating limits.
Is MAPLAD36KP85A qualified for automotive applications?
Yes, MAPLAD36KP85A is AEC-Q101 qualified, confirming its suitability for automotive powertrain and chassis applications. It meets stress test requirements including temperature cycling, humidity bias, and mechanical shock - validating reliability in under-hood and ADAS environments where load dump and EFT immunity are critical.
How does the PLAD package of MAPLAD36KP85A improve thermal performance compared to standard SMC or SMB packages?
The MAPLAD36KP85A uses a metal-base PLAD package with direct cathode-to-heatsink thermal path, achieving RθJC = 1.0 °C/W - over 30× better than typical SMC packages. This allows efficient dissipation of 36 kW pulses into PCB copper or external heatsinks, preventing thermal runaway during repetitive surges where standard packages would fail.
Can MAPLAD36KP85A be used for bidirectional protection?
No, MAPLAD36KP85A is unidirectional. For bidirectional operation at 85 V standoff, the correct variant is MAPLAD36KP85CA. The 'A' suffix denotes unidirectional construction with cathode on the metal base; 'CA' indicates bidirectional symmetry and different breakdown behavior - substituting one for the other will result in incorrect clamping or open-circuit failure.
What is the moisture sensitivity level (MSL) of MAPLAD36KP85A, and does it require baking before reflow?
MAPLAD36KP85A is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and does not require dry packing or pre-reflow baking. This simplifies manufacturing logistics and eliminates yield loss risks associated with moisture-induced popcorning during lead-free reflow.
MAPLAD36KP85A 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 263A
- 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
MAPLAD36KP85A FAQ
1.How can I place an order for MAPLAD36KP85A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP85A 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 MAPLAD36KP85A reliable?
The price and inventory of MAPLAD36KP85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP85A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP85A?
MAPLAD36KP85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP85A 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 MAPLAD36KP85A?
For technical support, including MAPLAD36KP85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP85A requirements.
6.How does Aetrix verify that MAPLAD36KP85A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP85A 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 MAPLAD36KP85A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP85A?
All MAPLAD36KP85A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP85A, 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 MAPLAD36KP85A part is unused and in its original packaging.
Return procedure for MAPLAD36KP85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP85A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
