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Vishay General Semiconductor - Diodes Division 6KA24/4
- Part No.:
- 6KA24/4
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- P600, Axial
- Datasheet:
-
6KA24/4.pdf
- Description:
- TVS DIODE 24VWM 45VC P600
- Quantity:
- Payment:
- Shipping:
Inventory:7,324
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Product details
Overview
6KA24/4 from Littelfuse is a premium automotive transient voltage suppressor diode (TVS) designed for load dump protection in engine compartment applications. It features a 24 V stand-off voltage, 6000 W peak pulse power (10/1000 µs), 40.0 V clamping voltage at 90 A, and operates from –65 °C to +185 °C - enabling robust protection of 24 V vehicle electronics against ISO 7637-2 Pulse 5a/b surges.
For engineers reviewing the 6KA24/4 datasheet, 6KA24/4 pinout, 6KA24/4 application, or 6KA24/4 equivalent, key selection criteria include clamping performance under 10/1000 µs and 10 µs/50 ms waveforms, high-temperature soldering tolerance (300 °C/10 s), low incremental surge resistance, and UL 94V-0 flammability compliance for under-hood deployment.
Technical Context
The 6KA24/4 employs GI's patented Passivated Anisotropic Rectifier (PAR) construction to achieve low dynamic impedance and stable breakdown behavior across temperature. Its nitride-passivated die in a molded P600 plastic case supports axial-leaded mounting with cathode indicated by color band and withstands 400 A peak forward surge current per JEDEC Method.
It delivers dual-pulse rating capability: 6000 W (10/1000 µs) and 2000 W (10 µs/50 ms), with clamping voltage tightly specified at 40.0 V (25 °C) and 45.0 V (150 °C) at 90 A - critical for protecting downstream DC-DC converters and microcontrollers during alternator load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 24 V - maximum continuous reverse operating voltage before significant leakage; defines system nominal bus voltage compatibility |
| Breakdown Voltage (VBR) | 26.7–32.6 V @ 100 mA, 25 °C - ensures reliable turn-on prior to damage threshold of protected ICs |
| Clamping Voltage (VC) | 40.0 V @ 90 A, 25 °C - limits transient voltage seen by downstream 24 V electronics during load dump |
| Peak Pulse Power (10/1000 µs) | 6000 W - sustains high-energy ISO 7637-2 Pulse 5a (load dump) without failure |
| Peak Forward Surge Current (IFSM) | 400 A @ 8.3 ms half-sine - handles repetitive surge stress in alternator regulation circuits |
| Operating Temperature Range | –65 °C to +185 °C - validated for under-hood placement near engines and exhaust manifolds |
| Leakage Current (ID) | 1.0 µA @ 24 V, 25 °C - minimizes standby power loss in always-on vehicle modules |
Pinout & Package
Package: Axial-leaded P600 molded plastic case (UL 94V-0 rated), nitride-passivated silicon die, color band denotes cathode (positive end). Dimensions: 0.340–0.360" length × 0.048–0.052" diameter (8.6–9.1 × 1.22–1.32 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to chassis or system ground; completes clamping path during transients |
| Cathode | Protected line terminal | Connected to 24 V supply rail; absorbs surge energy when voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| GI Patented PAR Construction | Enables stable, low-dynamic-impedance clamping across temperature and lifetime cycles |
| 6000 W Peak Pulse Power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a requirements for 24 V commercial vehicle systems |
| High-Temp Soldering Rating | Rated for 300 °C / 10 s at 0.375" lead length - compatible with automated through-hole reflow |
| UL 94V-0 Flammability | Ensures flame-retardant housing integrity in high-heat under-hood environments |
| Low Incremental Surge Resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin |
Applications
| Engine Control Unit (ECU) Protection | DC-DC Converter Input Stage |
|---|---|
Use Scenario: Installed across battery input of diesel/gasoline ECU modules exposed to alternator load dump pulses. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping surge energy before it reaches MCU power rails and CAN transceivers. Use Value: Prevents latch-up or permanent damage to 24 V-rated microcontrollers and analog front-ends during ISO 7637-2 Pulse 5 events. | Use Scenario: Placed at input of isolated 24 V-to-5 V/3.3 V DC-DC converters powering infotainment and ADAS sensors. IC Role / Device Role / Timing Role: Primary overvoltage clamp limiting input rail excursion during load dump and jump-start conditions. Use Value: Maintains converter enable logic and feedback stability by holding input below absolute maximum ratings (e.g., <45 V). |
| Body Control Module (BCM) Power Input | Commercial Vehicle Telematics Unit |
Use Scenario: Mounted on BCM main PCB near battery connector to protect LIN/CAN gateways and power management ICs. IC Role / Device Role / Timing Role: Fast-response TVS absorbing multi-kW transients while preserving low-quiescent-current operation. Use Value: Enables compliance with SAE J1113-11 immunity testing without derating or thermal shutdown. | Use Scenario: Integrated into telematics gateway power entry stage for fleet tracking units deployed in heavy-duty trucks. IC Role / Device Role / Timing Role: High-reliability surge suppression element meeting AEC-Q101 stress test requirements. Use Value: Supports 15-year field life in harsh thermal cycling environments with no parameter drift beyond spec limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower peak pulse power (600 W), DO-214AA package, unidirectional, 38.9 V clamping @ 15.4 A | Intended for lower-energy surges (e.g., ISO 16750-2); not rated for load dump | Select only for non-load-dump 24 V subsystems where space constraints preclude P600 |
| 1.5KE24A | Same P600 package, 1500 W peak pulse power (10/1000 µs), 38.7 V clamping @ 38.8 A | Lacks AEC-Q101 qualification and high-temp solder rating; limited to industrial use | Acceptable for cost-sensitive non-automotive 24 V designs requiring basic surge margin |
Compared with SMBJ24A and 1.5KE24A, the 6KA24/4 uniquely combines 6000 W load dump capability, AEC-Q101 alignment, UL 94V-0 housing, and 185 °C junction rating - making it the only option qualified for direct alternator-connected protection in premium automotive power distribution.
Availability
6KA24/4 is available at Aetrix Electronics and suitable for automotive ECU protection, commercial vehicle telematics, body control module power inputs, and DC-DC converter input stages requiring stable component supply across extended temperature and high-surge environments.
Supply support for 6KA24/4 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
Littelfuse is a global leader in circuit protection, power control, and sensing technologies, serving automotive, industrial, and consumer markets with safety-certified components.
The 6KA24/4 belongs to Littelfuse's premium automotive TVS diode family, engineered specifically for under-hood load dump suppression in 24 V commercial and off-highway vehicles - emphasizing reliability, thermal resilience, and ISO 7637-2 compliance.
FAQ
What is the clamping voltage of the 6KA24/4 at 90 A?
The 6KA24/4 has a maximum clamping voltage of 40.0 V at 90 A under 25 °C ambient conditions using an 80 µs square pulse width. At 150 °C junction temperature, this increases to 45.0 V - a critical specification for ensuring protected ICs remain within their absolute maximum voltage ratings during sustained load dump events. This value is measured per Note 4 in the official datasheet and reflects real-world performance under thermal stress.
Is the 6KA24/4 qualified to AEC-Q101 standards?
While the 6KA24/4 is explicitly designed for premium automotive under-hood use and meets ISO 7637-2 Pulse 5a requirements, Littelfuse documentation does not list formal AEC-Q101 qualification for this specific variant. Its construction, temperature range (–65 °C to +185 °C), and high-temp solder rating align with AEC-Q101 stress test severity, but design-in requires validation per customer qualification protocols. Always verify latest status via Littelfuse's official automotive product matrix.
What waveform does the 6000 W rating refer to for the 6KA24/4?
The 6000 W peak pulse power rating for the 6KA24/4 applies strictly to the 10/1000 µs double-exponential waveform defined by R.E.A. standards and illustrated in Figure 2 of the datasheet. This waveform models the dominant energy profile of alternator load dump events per ISO 7637-2. The device also supports 2000 W under the longer 10 µs/50 ms waveform (Figure 5), used for evaluating thermal endurance during repeated surges.
How is polarity identified on the 6KA24/4?
The 6KA24/4 uses a color band (typically white or silver) on the cathode end to indicate polarity, consistent with standard diode marking conventions. The cathode connects to the protected 24 V supply rail, while the anode connects to ground. This unidirectional configuration ensures clamping only during positive transients - matching the dominant polarity of automotive load dump surges. Mounting orientation must respect this marking to ensure proper protection function.
Can the 6KA24/4 be used in 12 V automotive systems?
No - the 6KA24/4 is specifically engineered for 24 V nominal systems, with a 24 V stand-off voltage (VWM) and breakdown range starting at 26.7 V. Using it in a 12 V system would cause excessive leakage current and premature conduction during normal operation, potentially disrupting power sequencing or causing thermal runaway. For 12 V applications, Littelfuse recommends variants such as 6KA12/4 or SMAJ12A, which match the system's operating voltage window.
6KA24/4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- P600, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 45V
- Current - Peak Pulse (10/1000µs):
- 90A (8/20µs)
- Power - Peak Pulse:
- 6000W (6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- P600
6KA24/4 FAQ
1.How can I place an order for 6KA24/4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 6KA24/4 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 6KA24/4 reliable?
The price and inventory of 6KA24/4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6KA24/4 is usually 5 days.
3.What payment methods are accepted for 6KA24/4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6KA24/4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6KA24/4?
6KA24/4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6KA24/4 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 6KA24/4?
For technical support, including 6KA24/4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6KA24/4 requirements.
6.How does Aetrix verify that 6KA24/4 is sourced from the original manufacturer or authorized distributors?
All 6KA24/4 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 6KA24/4 meets industry standards.
7.What is the process for return or replacement of 6KA24/4?
All 6KA24/4 units undergo pre-shipment inspection (PSI). If there is an issue with 6KA24/4, 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 6KA24/4 part is unused and in its original packaging.
Return procedure for 6KA24/4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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