My Inquiry
My Account
Microchip Technology MAPLAD36KP48A
- Part No.:
- MAPLAD36KP48A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP48A.pdf
- Description:
- TVS DIODE 48VWM 77.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,655
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD36KP48A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤77.4 V under 466 A peak impulse current, and features 48 V reverse standoff voltage with 53.3–58.9 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP48A datasheet, MAPLAD36KP48A pinout, MAPLAD36KP48A application, or MAPLAD36KP48A equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance, RoHS-compliant SMT packaging, and IEC 61000-4-5 Class 4/5 secondary lightning compliance are mandatory design criteria.
Technical Context
The MAPLAD36KP48A operates as a silicon avalanche diode-based unidirectional TVS, leveraging controlled breakdown behavior to clamp transients before downstream circuitry sustains damage. Its metal-base cathode construction enables direct thermal coupling to PCB copper pour or heatsink, achieving 1.0 °C/W junction-to-case thermal resistance.
It is rated for 48 V working standoff voltage and exhibits <100 ps response time from 0 V to minimum breakdown voltage. The device supports full surge testing per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) with 42 Ω, 12 Ω, and 2 Ω source impedances - validated up to Class 5 for RTCA DO-160F Waveform 4 and Level 4 for Waveform 5A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W @ 10/1000 μs - enables single-device protection against severe load dump and lightning-induced surges without cascaded staging |
| Reverse Standoff Voltage (VWM) | 48 V - matches nominal 42 V automotive and avionics DC bus systems while allowing margin above operating peak |
| Breakdown Voltage (V(BR)) | 53.3–58.9 V @ 5 mA - defines precise conduction onset threshold for predictable clamping behavior |
| Max Clamping Voltage (VC) | 77.4 V @ 466 A - limits voltage seen by protected ICs to safe levels during worst-case 10/1000 μs transients |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat transfer to PCB ground plane or external heatsink, critical for multi-pulse reliability |
| Standby Current (ID) | 10 μA @ 48 V - ensures negligible leakage in standby, preserving battery life and signal integrity |
| Response Time | <100 ps - provides sub-nanosecond reaction to fast-rising ESD and RFI events |
Pinout & Package
MAPLAD36KP48A uses a surface-mount PLAD package with metal base cathode configuration. The cathode is the exposed metal bottom surface; the anode is the top-side metallized pad. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended FR4 pad layout per Microsemi RF01216 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side pad) | Transient current entry point for positive surges | Connected to protected line (e.g., +42 V bus); conducts during overvoltage events toward cathode |
| Cathode (metal base) | Transient current return path and thermal interface | Must be soldered to large copper area or heatsink; serves dual role as electrical return and primary thermal dissipation surface |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Enables single-device protection of 28/42 V aerospace and heavy-duty automotive power rails without parallel staging |
| Metal-base thermal architecture | Reduces thermal resistance to 1.0 °C/W, supporting >0.05% duty cycle multi-stroke lightning events per DO-160 |
| AEC-Q101 qualification | Validates robustness for automotive under-hood applications including temperature cycling, humidity, and mechanical shock |
| RoHS-compliant (e3) plating | Meets global environmental compliance without compromising solderability or long-term intermetallic stability |
| RTCA DO-160F Waveform 4 & 5A compliance | Guarantees pin-injection surge immunity up to Level 4 (6.4/69 μs) and Level 4 (40/120 μs) at 48 V standoff |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protection of avionics DC bus (28 V / 42 V) against multi-stroke lightning transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping device on main power feed, placed upstream of DC-DC converters and flight control electronics. Use Value: Limits transient voltage to ≤77.4 V during 466 A surges, preventing latch-up or gate oxide rupture in protected SiC MOSFET drivers and microcontrollers. | Use Scenario: Guarding engine control unit (ECU) power inputs during alternator load dump events in 12 V/42 V hybrid architectures. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECU input filter, absorbing 36 kW energy pulses within 1 ms. Use Value: Eliminates need for series fusing or derated input capacitors due to guaranteed clamping performance and 1.0 °C/W thermal path. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: Safeguarding IGBT gate drivers and isolated feedback circuits in variable-frequency drives subjected to regenerative braking spikes. IC Role / Device Role / Timing Role: Secondary surge protector across DC link capacitor bank, triggered only during abnormal overvoltage conditions. Use Value: Withstands repeated 10/1000 μs surges up to 466 A without parameter drift, verified via 3σ lot norm screening on standby current. | Use Scenario: Protecting 72 V DC signaling power supplies in rolling stock against induced lightning surges per EN 50121-3-2. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (unidirectional MAPLAD36KP48A used with polarity-aware layout) deployed at trackside cabinet inputs. Use Value: Achieves IEC 61000-4-5 Class 4 compliance with 42 Ω source impedance, enabling certification without external impedance matching networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A | 600 W PPP rating, 3.5× lower peak power handling; TO-263 package with higher RθJA (40 °C/W) | Limited to single-stroke or low-duty-cycle industrial I/O protection; not certified for DO-160 or AEC-Q101 | Select when cost sensitivity outweighs multi-stroke reliability and aerospace qualification requirements |
| SMCJ48A | 1500 W PPP rating, same unidirectional configuration but 24× lower power; SMC package with 1.5 °C/W RθJC | Suitable for consumer-grade automotive modules (e.g., infotainment), not for safety-critical power distribution | Choose for non-safety-critical 12 V systems where footprint and cost constrain use of 36 kW devices |
Compared with SMBJ48A and SMCJ48A, the MAPLAD36KP48A delivers 60× and 24× higher peak pulse power respectively, with certified AEC-Q101 reliability, DO-160F compliance, and metal-base thermal performance essential for aerospace and high-end automotive power systems.
Availability
MAPLAD36KP48A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC link applications requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP48A 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, high-power, and timing-critical applications.
The MAPLAD36KP48A belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning protection in aircraft power systems and ruggedized automotive electronics where thermal management and qualification rigor are non-negotiable.
FAQ
What is the clamping voltage specification for MAPLAD36KP48A under maximum rated surge current?
The MAPLAD36KP48A has a maximum clamping voltage (VC) of 77.4 V at 466 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per standard test methods defined in IEC 61000-4-5 and is guaranteed across the full operating temperature range of −55 °C to +150 °C. The MAPLAD36KP48A maintains this clamping performance even after multiple surge events due to its low thermal resistance and wafer-level lot traceability.
Is MAPLAD36KP48A qualified for automotive under-hood applications?
Yes, the MAPLAD36KP48A is explicitly qualified to AEC-Q101 for stress testing including temperature cycling, humidity, mechanical shock, and high-temperature reverse bias. Its 1.0 °C/W junction-to-case thermal resistance and metal-base construction enable reliable operation in under-hood environments up to +150 °C junction temperature. The MAPLAD36KP48A is routinely deployed in 42 V mild-hybrid ECUs and battery disconnect units where load dump immunity is critical.
How does the PLAD package of MAPLAD36KP48A differ from standard SMC or SMB packages in thermal performance?
The MAPLAD36KP48A uses a proprietary void-free transfer-molded thermosetting epoxy package with an exposed metal base that serves as both cathode terminal and primary thermal interface. This yields a junction-to-case thermal resistance of 1.0 °C/W - significantly lower than SMC (1.5 °C/W) or SMB (40 °C/W) packages. As a result, the MAPLAD36KP48A dissipates heat directly into PCB copper or heatsinks, enabling sustained multi-pulse operation required by RTCA DO-160 Section 22.
Does MAPLAD36KP48A meet IEC 61000-4-5 with 2 Ω source impedance?
Yes, the MAPLAD36KP48A is certified for IEC 61000-4-5 Class 4 protection with 2 Ω source impedance, supporting peak currents up to 466 A. This capability is documented in Microsemi RF01216 Rev B for the MPLAD36KP48A variant. The device achieves this performance through low dynamic impedance and rapid avalanche response (<100 ps), making it suitable for short-distance lightning protection in tightly coupled wiring harnesses where low source impedance dominates.
Can MAPLAD36KP48A be used in bidirectional configurations?
No - MAPLAD36KP48A is a unidirectional TVS. For bidirectional operation at 48 V standoff, the correct variant is MAPLAD36KP48CA (with CA suffix). The MAPLAD36KP48A has polarity marking on the top surface and requires correct orientation during placement: cathode must connect to system ground or lowest potential node. Using MAPLAD36KP48A in reverse-biased AC applications will result in forward conduction and failure.
MAPLAD36KP48A 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 466A
- 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
MAPLAD36KP48A FAQ
1.How can I place an order for MAPLAD36KP48A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP48A 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 MAPLAD36KP48A reliable?
The price and inventory of MAPLAD36KP48A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP48A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP48A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP48A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP48A?
MAPLAD36KP48A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP48A 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 MAPLAD36KP48A?
For technical support, including MAPLAD36KP48A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP48A requirements.
6.How does Aetrix verify that MAPLAD36KP48A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP48A 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 MAPLAD36KP48A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP48A?
All MAPLAD36KP48A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP48A, 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 MAPLAD36KP48A part is unused and in its original packaging.
Return procedure for MAPLAD36KP48A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP48A 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…
