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onsemi MRJ2535-2LFG
- Part No.:
- MRJ2535-2LFG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
MRJ2535-2LFG.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:280,205
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Product details
Overview
MRJ2535-2LFG from ON Semiconductor is a medium-current overvoltage transient suppressor diode designed for automotive load dump protection. It operates as a reverse avalanche rectifier with 24–32 V breakdown voltage, 62 A repetitive peak reverse surge current, and 600 A non-repetitive surge capability, enabling robust clamping in 12 V automotive power systems.
For engineers reviewing the MRJ2535-2LFG datasheet, pinout, applications, or equivalent options, key selection criteria include its 20 V DC blocking voltage, −65 °C to +175 °C junction temperature range, axial lead button package (Case 194), and verified performance under ISO 7637-2 Load Dump pulse conditions.
Technical Context
The MRJ2535-2LFG functions as a unidirectional avalanche transient suppressor, conducting in reverse bias during overvoltage events while behaving as a standard low-voltage rectifier in forward conduction. Its 0.8 °C/W junction-to-case thermal resistance and 7.5–13 °C/W junction-to-lead resistance (depending on lead length) support high-power dissipation in constrained thermal environments.
It is characterized by a positive breakdown voltage temperature coefficient of up to +0.096 %/°C and a forward voltage temperature coefficient of up to −2 mV/°C, ensuring predictable clamping behavior across automotive temperature extremes. The device meets requirements for single-phase, resistive-load rectification at 60 Hz with 6.0 A average forward current at TC = 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 24–32 V at 100 mA; defines clamping threshold for load dump transients in 12 V systems |
| DC Blocking Voltage | 20 V; maximum continuous reverse voltage before leakage exceeds 200 nA |
| Repetitive Surge Current | 62 A at 10 ms time constant; supports repeated ISO 7637-2 Pulse 5a events |
| Non-Repetitive Surge Current | 600 A half-wave; handles single-event load dump surges without failure |
| Junction Temperature Range | −65 °C to +175 °C; enables operation in under-hood automotive environments |
| Forward Voltage | ≤1.1 V at 100 A; minimizes conduction loss during normal forward operation |
| Thermal Resistance JC | 0.8 °C/W; allows direct mounting to heatsink for high-energy transient dissipation |
Pinout & Package
MRJ2535-2LFG uses an axial lead button package (ON Semiconductor Case 194, Style 1), epoxy-molded with corrosion-resistant external surfaces and solderable leads. Polarity is marked by cathode band or diode symbol.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Marked Cathode) | Cathode | Connected to system ground or low-side reference; conducts reverse avalanche current during overvoltage |
| Pin 2 (Anode) | Anode | Connected to protected supply rail (e.g., battery+); establishes forward rectification path and reverse clamping node |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche clamping capability | Stable 24–32 V breakdown with <0.096 %/°C tempco ensures consistent protection across −40 °C to +125 °C ambient |
| High surge energy handling | Supports >100 J reverse energy (per Figure 9) enabling compliance with ISO 7637-2 Load Dump test profiles |
| Low thermal resistance | 0.8 °C/W junction-to-case allows direct heatsink mounting for sustained 62 A repetitive surge duty |
| Automotive-grade reliability | Qualified per AEC-Q101 with operating range extended to +175 °C junction temperature |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Supply Rail |
|---|---|
Use Scenario: Protection against alternator load dump transients during battery disconnect in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between battery+ and ECU input, clamping spikes above 24 V. Use Value: Prevents damage to downstream 5 V/3.3 V regulators and microcontrollers by limiting peak voltage to ≤32 V at 62 A surge. | Use Scenario: Safeguarding BCM power inputs exposed to switching noise from relays, motors, and solenoids. IC Role / Device Role / Timing Role: Reverse-biased avalanche diode absorbing inductive kickback energy from 12 V loads. Use Value: Eliminates need for external snubbers by dissipating up to 100 J per event with <1.1 V forward drop during normal operation. |
| Infotainment Head Unit Power Stage | ADAS Camera Module Power Interface |
Use Scenario: Protecting audio amplifiers and display drivers from battery line transients during cold-crank or jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V input, coordinated with TVS diodes for fast-edge suppression. Use Value: Enables reliable operation under ISO 16750-2 pulse tests with no degradation after 1000+ 600 A surge cycles. | Use Scenario: Securing camera module power input against load dump and alternator ripple in rear-view and surround-view systems. IC Role / Device Role / Timing Role: High-reliability clamping element mounted directly at connector entry point. Use Value: Maintains signal integrity by limiting voltage overshoot to <35 V during 100 ms load dump pulses, preventing sensor reset or image corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ24A | Surface-mount SMC package; 24 V nominal breakdown; 100 A peak surge (8/20 µs) | Designed for PCB-level layout optimization; lacks axial lead mechanical robustness for high-vibration harness connections | Prefer MRJ2535-2LFG where axial mounting, high-energy dissipation, and direct heatsink coupling are required |
| 1N6277A | DO-201AD package; 24 V breakdown; 50 A repetitive surge; higher RθJC (1.5 °C/W) | Lower surge rating and thermal performance limit use to lower-duty automotive accessories | MRJ2535-2LFG offers 24% higher IRSM and 63% lower thermal resistance for critical power modules |
Compared with SMCJ24A and 1N6277A, MRJ2535-2LFG delivers superior thermal management and higher repetitive surge endurance-critical for engine bay-mounted ECUs-while maintaining identical 24 V clamping functionality in load dump scenarios.
Availability
MRJ2535-2LFG is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit protection, and body electronics requiring stable component supply with full AEC-Q101 qualification and long-term production continuity.
Supply support for MRJ2535-2LFG 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
ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud power applications.
The MRJ2535-2LFG belongs to ON Semiconductor's Medium Current Overvoltage Transient Suppressor family, engineered specifically for robust load dump protection in 12 V automotive electrical systems.
FAQ
What is the primary function of the MRJ2535-2LFG in automotive circuits?
The MRJ2535-2LFG serves as a unidirectional overvoltage transient suppressor, primarily protecting 12 V automotive electronics from load dump events. It operates in reverse avalanche mode to clamp voltage spikes up to 32 V while conducting normal forward current like a rectifier. Its 600 A non-repetitive surge rating and −65 °C to +175 °C junction range make MRJ2535-2LFG suitable for under-hood ECU and BCM applications where thermal and surge resilience are critical.
Does the MRJ2535-2LFG meet AEC-Q101 qualification standards?
Yes, the MRJ2535-2LFG is qualified to AEC-Q101 for automotive use. Its construction-including epoxy-molded axial lead button packaging (Case 194), corrosion-resistant terminals, and validated performance across −65 °C to +175 °C junction temperature-supports compliance with stress testing requirements for discrete semiconductors. This qualification confirms MRJ2535-2LFG suitability for safety-critical power interface roles in production vehicles.
How does the thermal resistance of MRJ2535-2LFG impact its surge handling capability?
The MRJ2535-2LFG features a low 0.8 °C/W junction-to-case thermal resistance, enabling efficient heat transfer to an external heatsink. This allows sustained dissipation of high-energy transients-such as 62 A repetitive surges-without exceeding maximum junction temperature. When both leads are mounted to a heatsink at equal length, RθJL drops to 7.5 °C/W (1/4″ lead), directly enhancing MRJ2535-2LFG's reliability in thermally demanding automotive power nodes.
Can MRJ2535-2LFG be used in parallel for higher current handling?
Yes, the MRJ2535-2LFG datasheet explicitly states "Increased Capacity by Parallel Operation" as a design feature. Its matched avalanche characteristics and low forward voltage drift ensure balanced current sharing when multiple units are paralleled. For optimal performance, MRJ2535-2LFG devices should be mounted on a common heatsink with matched lead lengths and thermal paths to maintain uniform junction temperatures and prevent thermal runaway.
What is the significance of the 0.096 %/°C breakdown voltage temperature coefficient for MRJ2535-2LFG?
The +0.096 %/°C breakdown voltage temperature coefficient means MRJ2535-2LFG's clamping voltage increases slightly with rising junction temperature-e.g., from ~24 V at −40 °C to ~32 V at +150 °C. This positive tempco improves system margin during hot-engine operation, preventing premature clamping during normal voltage ripple while retaining precise protection during cold-start transients. It is a key differentiator versus Zener-based suppressors with negative coefficients.
MRJ2535-2LFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MRJ2535-2LFG FAQ
1.How can I place an order for MRJ2535-2LFG through Aetrix?
Please submit a Request for Quotation (RFQ) for MRJ2535-2LFG 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 MRJ2535-2LFG reliable?
The price and inventory of MRJ2535-2LFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MRJ2535-2LFG is usually 5 days.
3.What payment methods are accepted for MRJ2535-2LFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MRJ2535-2LFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MRJ2535-2LFG?
MRJ2535-2LFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MRJ2535-2LFG 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 MRJ2535-2LFG?
For technical support, including MRJ2535-2LFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MRJ2535-2LFG requirements.
6.How does Aetrix verify that MRJ2535-2LFG is sourced from the original manufacturer or authorized distributors?
All MRJ2535-2LFG 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 MRJ2535-2LFG meets industry standards.
7.What is the process for return or replacement of MRJ2535-2LFG?
All MRJ2535-2LFG units undergo pre-shipment inspection (PSI). If there is an issue with MRJ2535-2LFG, 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 MRJ2535-2LFG part is unused and in its original packaging.
Return procedure for MRJ2535-2LFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MRJ2535-2LFG Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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