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Microchip Technology MX15KP33CA/TR
- Part No.:
- MX15KP33CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-204AR, Axial
- Datasheet:
-
MX15KP33CA/TR.pdf
- Description:
- TVS 33V 5% 15000W BI
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
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Product details
Overview
MX15KP33CA/TR from Microchip Technology is a unidirectional axial-lead transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 33 V working standoff voltage (VWM), 54.8 V maximum clamping voltage at 274 A peak pulse current, and 15,000 W peak pulse power rating at 10/1000 µs waveform - enabling robust secondary lightning and EFT/ESD protection per IEC61000-4-2, -4-4, and -4-5 in industrial power supplies and telecom interfaces.
For engineers reviewing the MX15KP33CA/TR datasheet, MX15KP33CA/TR pinout, MX15KP33CA/TR application, or MX15KP33CA/TR equivalent, key selection criteria include VWM ≥ system DC operating voltage, VC < protected IC's absolute maximum rating, IPP margin against expected surge threat level, and axial-lead through-hole compatibility with legacy PCB layouts requiring high-reliability TVS hardening.
Technical Context
This device operates as a silicon avalanche diode with bidirectional capability disabled by cathode-band polarity marking, delivering sub-100 ps response time to clamp transients before sensitive downstream circuitry sustains damage. Its DO-204AR package provides 20 °C/W junction-to-lead thermal resistance and supports 200 A non-repetitive surge forward current under 8.3 ms half-sine conditions.
Designed for secondary lightning protection per IEC61000-4-5 with 42 Ω, 12 Ω, or 2 Ω source impedances, the MX15KP33CA/TR meets Class 1–4 requirements across multiple impedance configurations and is screened to MIL-PRF-19500 upscreening levels for enhanced reliability in aerospace and defense systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V DC - maximum continuous reverse voltage applied without conduction; must exceed system nominal DC bus or signal rail voltage. |
| V(BR) min | 36.7 V at 5 mA - guaranteed avalanche initiation threshold; ensures reliable turn-on before protected circuit exceeds safe voltage limits. |
| VC @ IPP | 54.8 V at 274 A (10/1000 µs) - clamped voltage seen by downstream components during worst-case surge; determines minimum withstand rating of ICs being protected. |
| IPP | 274 A peak impulse current - maximum transient current the device can safely divert without degradation; defines surge handling capacity for IEC61000-4-5 Level 4 compliance. |
| ID @ VWM | 10 µA max - leakage current at rated standoff voltage; low enough to avoid power loss or false triggering in high-impedance monitoring circuits. |
| RθJL | 20 °C/W - thermal resistance from junction to lead; enables direct solder-point heat dissipation into PCB copper, critical for repeated surge duty cycles. |
| Package | DO-204AR axial-lead - industry-standard through-hole plastic package with void-free UL94V-0 epoxy body and tin-lead or RoHS-compliant matte-tin plating. |
Pinout & Package
DO-204AR axial-lead package with two terminals: anode and cathode. Cathode identified by molded band on body; no band on bidirectional variants. Leads are tinned, solderable per MIL-STD-750 Method 2026, and dimensionally compliant with Figure 5-1 (LL: 27.95–38.1 mm, BD: 6.1–6.35 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path); conducts only during reverse-transient clamping when cathode is at higher potential. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., +33 V rail); avalanche breakdown occurs here when line voltage exceeds V(BR), shunting surge energy to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| 15,000 W peak pulse power | Enables single-device protection against severe IEC61000-4-5 Level 4 surges (4 kV, 2 Ω source) without cascaded TVS staging. |
| 100% surge tested | Each unit validated at rated IPP, ensuring field reliability without batch-level statistical sampling assumptions. |
| MIL-PRF-19500 upscreening options | Available wafer/lot traceability, 3σ ID screening, and moisture sensitivity level 1 (no dry pack required) for mission-critical deployments. |
| RoHS-compliant versions | Meets environmental compliance mandates without sacrificing electrical performance or thermal robustness. |
| Sub-100 ps response time | Clamps ESD events (IEC61000-4-2) before propagation into CMOS/BiCMOS logic, preventing latch-up or gate oxide rupture. |
Applications
| Industrial AC/DC Power Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: 24–48 V DC power input stage of programmable logic controllers exposed to load dump and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +VIN and chassis ground to clamp positive-going transients while blocking reverse leakage during normal operation. Use Value: Withstands 274 A surges at 54.8 V clamping, protecting upstream rectifiers and downstream DC-DC controllers rated to 60 V absolute maximum. | Use Scenario: T1/E1 data line interface in base station equipment subjected to induced RFI and switching transients from nearby RF amplifiers. IC Role / Device Role / Timing Role: Standoff-rated TVS on tip/ring pairs to suppress common-mode surges without loading 100 Ω differential impedance during idle state. Use Value: 33 V VWM matches typical line bias voltage; 10 µA ID avoids signal integrity degradation in high-impedance receive paths. |
| Automotive Body Control Module (BCM) Power Rail | Renewable Energy Inverter DC Link Protection |
Use Scenario: 12 V battery-supplied microcontroller power rail in BCM subject to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail, positioned upstream of LDO regulators to prevent regulator failure during load dump. Use Value: 15,000 W rating handles 12 V system load dump (Pulse 5a) without derating; DO-204AR mechanical robustness resists vibration-induced fatigue. | Use Scenario: DC link between PV array and inverter stage in solar microinverters, exposed to rapid voltage transients during MPPT switching and grid fault recovery. IC Role / Device Role / Timing Role: High-power TVS across DC+ and DC− rails to limit voltage overshoot during IGBT turn-off and prevent capacitor overvoltage stress. Use Value: 20 °C/W RθJL allows direct thermal coupling to heatsink-mounted busbars, sustaining repetitive surge duty in outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Lower peak power (600 W), SMC package, 53.3 V VC @ 12.3 A IPP | Not suitable for IEC61000-4-5 Level 4; limited to board-level ESD/EFT where surge energy is low. | Select SMBJ33A only for space-constrained designs with ≤1 kV surge exposure and no secondary lightning requirement. |
| 15KPA33A | Same 15 kW rating and DO-204AR package, but higher VWM tolerance (±5%) and 56.5 V VC @ 265 A IPP | Compatible for identical mounting and surge class, but slightly higher clamping may reduce margin for 5 V logic protection. | 15KPA33A is a functionally aligned alternative with minor VC trade-off; verify protected IC's VMAX margin before substitution. |
Compared with MX15KP33CA/TR, SMBJ33A offers compact SMC packaging but lacks the 15 kW surge capacity needed for infrastructure-grade protection, while 15KPA33A delivers equivalent power handling with marginally higher clamping - making it viable where layout and thermal constraints match and 1.7 V VC increase is acceptable.
Availability
MX15KP33CA/TR is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and renewable energy inverters requiring stable component supply with long-term lifecycle assurance and RoHS-compliant sourcing.
Supply support for MX15KP33CA/TR 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
Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and high-reliability protection components with global design and manufacturing infrastructure.
The M15KP series is part of Microchip's high-power TVS portfolio engineered specifically for secondary lightning and high-energy transient suppression in harsh industrial, telecom, and transportation environments.
FAQ
What is the clamping voltage specification for MX15KP33CA/TR under standard test conditions?
The MX15KP33CA/TR has a maximum clamping voltage (VC) of 54.8 V when subjected to a 10/1000 µs surge waveform at its rated peak pulse current of 274 A. This value is measured across the device terminals during transient conduction and defines the upper voltage limit imposed on protected circuitry - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The MX15KP33CA/TR achieves this clamping performance while maintaining low leakage (<10 µA) at its 33 V working standoff voltage.
Is MX15KP33CA/TR suitable for bidirectional signal line protection?
No, MX15KP33CA/TR is a unidirectional TVS diode, indicated by the cathode band on its DO-204AR package. It conducts only during reverse-biased overvoltage events on the cathode terminal and blocks forward current. For bidirectional protection (e.g., AC lines or differential data pairs), a dedicated bidirectional variant such as MX15KP33CA (without "/TR" suffix and lacking cathode band) must be selected - the MX15KP33CA/TR itself is not rated for symmetrical surge suppression in both polarities.
How does the thermal resistance of MX15KP33CA/TR impact its surge repetition capability?
The MX15KP33CA/TR has a junction-to-lead thermal resistance (RθJL) of 20 °C/W, enabling efficient heat transfer from the silicon die directly into the PCB copper or heatsink via its axial leads. This low thermal resistance supports higher repetition rates of 10/1000 µs surges without cumulative junction temperature rise exceeding 150 °C - critical for applications like motor drives or solar inverters where transient events occur multiple times per minute. The MX15KP33CA/TR's thermal design eliminates need for supplemental heatsinking in most through-hole implementations.
What upscreening options are available for MX15KP33CA/TR under MIL-PRF-19500?
MX15KP33CA/TR qualifies for MIL-PRF-19500 upscreening including 3σ lot norm screening on standby current (ID), full lot traceability for wafer fabrication and assembly, and moisture sensitivity level 1 per IPC/JEDEC J-STD-020F (no dry pack required). These options are designated in the part nomenclature and require factory consultation - they are not included in standard commercial-grade MX15KP33CA/TR shipments but can be specified for aerospace, defense, or high-reliability industrial programs where extended lifetime and failure mode predictability are mandatory.
Does MX15KP33CA/TR comply with IEC61000-4-5 for secondary lightning protection?
Yes, MX15KP33CA/TR is explicitly rated for secondary lightning protection per IEC61000-4-5 across multiple source impedances: it supports Class 1–4 testing with 42 Ω and 12 Ω sources, and Class 2–4 with 2 Ω source impedance. Its 15,000 W peak pulse power and 274 A IPP capability meet the energy thresholds required for these classifications. The MX15KP33CA/TR's documented performance in the official Microchip datasheet DS00005222B confirms compliance without derating when mounted per recommended PCB layout guidelines.
MX15KP33CA/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-204AR, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 54.8V
- Current - Peak Pulse (10/1000µs):
- 274A
- Power - Peak Pulse:
- 15000W (15kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AR
MX15KP33CA/TR FAQ
1.How can I place an order for MX15KP33CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MX15KP33CA/TR 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 MX15KP33CA/TR reliable?
The price and inventory of MX15KP33CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX15KP33CA/TR is usually 5 days.
3.What payment methods are accepted for MX15KP33CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX15KP33CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX15KP33CA/TR?
MX15KP33CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX15KP33CA/TR 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 MX15KP33CA/TR?
For technical support, including MX15KP33CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX15KP33CA/TR requirements.
6.How does Aetrix verify that MX15KP33CA/TR is sourced from the original manufacturer or authorized distributors?
All MX15KP33CA/TR 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 MX15KP33CA/TR meets industry standards.
7.What is the process for return or replacement of MX15KP33CA/TR?
All MX15KP33CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MX15KP33CA/TR, 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 MX15KP33CA/TR part is unused and in its original packaging.
Return procedure for MX15KP33CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MX15KP33CA/TR Tags
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