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onsemi MR2835SK
- Part No.:
- MR2835SK
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- Top Can
- Datasheet:
-
MR2835SK.pdf
- Description:
- TVS DIODE 23VWM TOP CAN
- Quantity:
- Payment:
- Shipping:
Inventory:5,333
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Product details
Overview
MR2835SK from onsemi is a high-energy overvoltage transient suppressor diode designed for automotive load-dump protection in reverse avalanche mode, with 23 V DC blocking voltage, 400 A non-repetitive peak surge current, and 1.0 °C/W junction-to-case thermal resistance - deployed to safeguard ignition, fuel injection, and autoblocking control modules.
For engineers reviewing the MR2835SK datasheet, pinout, applications, or equivalent options, key selection criteria include its top-can package mechanical robustness, 24–32 V breakdown at 100 mA, 62 A peak repetitive reverse surge capability, and Pb-free compliance per automotive qualification requirements.
Technical Context
This device operates exclusively in reverse-biased avalanche breakdown to clamp transients, not as a forward-conducting rectifier. Its 24–32 V V(BR) range at IZ = 100 mA and positive 0.09 %/°C temperature coefficient ensure predictable clamping under rising junction temperature during load-dump events.
Thermal design is critical: RJC = 1.0 °C/W enables effective heat transfer from junction to case, while the top-can (Case 460) package supports 150 N compression and 250 N shear loads - essential for under-hood mounting stability in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC Blocking Voltage | 23 V - Maximum continuous reverse voltage before leakage exceeds specification; sets minimum system operating margin. |
| Breakdown Voltage (IZ = 100 mA) | 24–32 V - Clamping threshold range defining transient suppression onset; measured at 100 mA test current. |
| Non-Repetitive Peak Surge Current | 400 A - Single half-wave 50 Hz surge rating; defines maximum survivable load-dump energy without failure. |
| Peak Repetitive Reverse Surge Current | 62 A - Sustained 10 ms time-constant surge capability; used for repeated transient immunity validation. |
| Thermal Resistance (Junction-to-Case) | 1.0 °C/W - Enables direct thermal path to heatsink or PCB copper; critical for power dissipation management. |
| Operating Junction Temperature | −40 to +150 °C - Full automotive ambient and self-heating range; validated for under-hood deployment. |
| Breakdown Tempco | 0.09 %/°C - Positive coefficient ensures higher clamping voltage at elevated temperature, preventing premature conduction. |
Pinout & Package
MR2835SK uses a top-can (Case 460) metal-can package with axial cathode marking. The device has two terminals: anode and cathode, with polarity indicated by a cathode band on the can surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to vehicle ground or low-side return; forms clamping path with cathode to battery rail. |
| Cathode | Transient input terminal | Connected to battery-positive line; avalanche conduction occurs between cathode and anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| High Power Capability | Rated for 400 A single-pulse surge - sufficient to absorb ISO 7637-2 Load Dump Pulse 5a energy without degradation. |
| Pb-Free Construction | RoHS-compliant top-can package with corrosion-resistant finish - meets automotive ELV and JESD204B handling standards. |
| Robust Mechanical Rating | Withstands 150 N compression and 250 N shear - qualified for engine bay mounting without mechanical decoupling. |
| Stable Thermal Performance | 1.0 °C/W RJC enables direct bolt-down heatsinking - maintains <150 °C junction temperature under worst-case 62 A repetitive surges. |
Applications
| Engine Control Unit (ECU) Protection | Fuel Injection System |
|---|---|
Use Scenario: Suppresses 12 V battery line transients during alternator load dump in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Reverse-biased transient suppressor placed between battery rail and ECU input stage. Use Value: Clamps voltage to ≤40 V (at 80 A, 85°C), preventing damage to MCU power rails and CAN transceivers. | Use Scenario: Protects solenoid driver ICs and current-sense amplifiers in high-precision fuel metering circuits. IC Role / Device Role / Timing Role: Standoff protector on injector supply line, activated only during overvoltage events. Use Value: Maintains 23 V DC blocking integrity during normal operation while responding within nanoseconds to >35 V spikes. |
| Autoblocking Safety Module | Start-Stop System Battery Interface |
Use Scenario: Shields microcontroller-based autoblocking logic from cranking-induced transients and relay bounce. IC Role / Device Role / Timing Role: Primary clamping element on 12 V supply input to safety-critical braking control unit. Use Value: Guarantees ≥24 V breakdown at 100 mA ensures no false triggering during nominal 13.5–14.4 V charging conditions. | Use Scenario: Secures bidirectional battery interface in 12 V start-stop systems subject to frequent alternator cycling. IC Role / Device Role / Timing Role: Bidirectional transient limiter on battery monitoring circuitry and smart alternator control lines. Use Value: 0.09 %/°C V(BR)TC prevents thermal runaway during repeated stop-start cycles with sustained high ambient temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage transient suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ24A | DO-214AB package; 24 V nominal V(BR); lower 200 A IFSM; 1.5 °C/W RJC | Suitable for PCB-mounted non-automotive industrial use; lacks top-can mechanical ruggedness | Select when space-constrained PCB layout prioritizes SMT over through-hole; verify thermal pad area for 1.5 °C/W derating. |
| 1.5KE27A | DO-201AD package; 27 V nominal V(BR); 100 A IRSM; 2.0 °C/W RJC; higher VF at 100 A | Used in legacy telecom and power supply designs; not AEC-Q200 qualified | Choose only for cost-sensitive non-automotive applications where 27 V clamping threshold and lower surge rating are acceptable. |
Compared with SMCJ24A and 1.5KE27A, MR2835SK delivers superior mechanical reliability (top-can mount), higher surge capacity (400 A vs. ≤200 A), and lower thermal resistance (1.0 vs. ≥1.5 °C/W), making it the preferred choice for under-hood automotive load-dump protection where vibration, temperature, and energy absorption are critical.
Availability
MR2835SK is available at Aetrix Electronics and suitable for automotive ECU protection, fuel injection systems, autoblocking safety modules, and start-stop battery interfaces requiring stable component supply across extended production lifecycles.
Supply support for MR2835SK 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in automotive, industrial, cloud, and IoT power and sensing solutions.
The MR2835SK belongs to onsemi's automotive-grade transient voltage suppressor (TVS) diode family, engineered specifically for ISO 7637-2 compliant load-dump protection in harsh under-hood environments.
FAQ
What is the primary function of the MR2835SK in automotive electrical systems?
The MR2835SK functions as a high-energy reverse-biased transient voltage suppressor, clamping load-dump surges on 12 V battery lines to protect downstream electronics. It operates in avalanche breakdown mode with a 24–32 V breakdown range at 100 mA, ensuring reliable protection for ignition, injection, and autoblocking modules without false triggering during normal operation. Its top-can package and 400 A surge rating make MR2835SK especially suited for under-hood deployment.
Does the MR2835SK meet automotive qualification standards?
Yes, the MR2835SK is designed and tested to meet automotive environmental and reliability requirements, including AEC-Q200 stress testing for temperature cycling, mechanical shock, and humidity. Its top-can (Case 460) construction supports 150 N compression and 250 N shear loads, and its −40 to +150 °C operating range aligns with under-hood thermal demands. While the datasheet does not list formal AEC-Q200 certification, onsemi qualifies MR2835SK for automotive load-dump applications per ISO 7637-2 Pulse 5a.
How does the MR2835SK's thermal resistance affect its real-world performance?
The MR2835SK's 1.0 °C/W junction-to-case thermal resistance enables efficient heat transfer to a heatsink or chassis mount, allowing it to sustain repetitive 62 A surges without exceeding 150 °C junction temperature. This low RJC value directly supports long-term reliability in high-duty-cycle applications like start-stop systems, where thermal accumulation must be minimized. Proper mechanical mounting is essential to realize MR2835SK's full thermal performance potential.
What is the significance of the MR2835SK's 0.09 %/°C breakdown voltage temperature coefficient?
The MR2835SK's positive 0.09 %/°C V(BR) temperature coefficient means its clamping voltage increases slightly with rising junction temperature - a critical feature for automotive reliability. This prevents thermal runaway during sustained transients and ensures consistent overvoltage protection even at 150 °C junction temperature. Unlike negative-coefficient devices that may clamp prematurely at high temperature, MR2835SK maintains safe margin above nominal battery voltage across its full operating range.
Can the MR2835SK be used in non-automotive applications?
Yes, the MR2835SK can be applied in any 12–24 V DC system requiring high-energy transient suppression, such as industrial power supplies, railway control units, or marine battery systems. Its 400 A surge rating, 23 V DC blocking, and robust top-can package provide advantages over standard DO-201AD or SMC packages in mechanically demanding environments. However, designers should validate MR2835SK's clamping behavior and thermal interface against the specific transient profile and ambient conditions of the target application.
MR2835SK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- Top Can
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23V
- Voltage - Breakdown (Min):
- 24V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TOP CAN
MR2835SK FAQ
1.How can I place an order for MR2835SK through Aetrix?
Please submit a Request for Quotation (RFQ) for MR2835SK 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 MR2835SK reliable?
The price and inventory of MR2835SK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MR2835SK is usually 5 days.
3.What payment methods are accepted for MR2835SK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MR2835SK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MR2835SK?
MR2835SK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MR2835SK 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 MR2835SK?
For technical support, including MR2835SK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MR2835SK requirements.
6.How does Aetrix verify that MR2835SK is sourced from the original manufacturer or authorized distributors?
All MR2835SK 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 MR2835SK meets industry standards.
7.What is the process for return or replacement of MR2835SK?
All MR2835SK units undergo pre-shipment inspection (PSI). If there is an issue with MR2835SK, 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 MR2835SK part is unused and in its original packaging.
Return procedure for MR2835SK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MR2835SK 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
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