PTC Thermistors 440volts 120ohms ICL AEC-Q200

B59412C1130B070 – 120Ω Automotive Inrush Current Limiter – TDK Electronics

Ensure reliable circuit protection in demanding automotive applications with the TDK B59412C1130B070 inrush current limiter. This AEC-Q200 qualified component safeguards sensitive electronics from damaging startup surges while delivering robust performance in harsh environments. Trust PCX for guaranteed genuine TDK components and industry-leading fulfillment speed.

Key Features

• Resistance: 120Ω @ 25°C (±25% tolerance)
• Grade: Automotive (AEC-Q200 qualified)
• Dimensions: 0.591″ (15.00mm) diameter, 0.197″ (5.00mm) lead spacing
• Packaging: Bulk format for production efficiency
• Reliability: Active status with industrial temperature resilience

Technical Specifications

Part of TDK’s B59412 series, this inrush current limiter (ICL) features a compact radial design optimized for high-vibration environments. Its ceramic PTC thermistor construction provides repeatable current suppression during power-on events, automatically resetting after cool-down. Operating temperature range complies with automotive standards (-40°C to +85°C), ensuring stability in engine compartments and control modules. Download datasheet (PCX-hosted).

Typical Applications

• ECU (Engine Control Unit) power supply protection
• LED headlight/taillight surge suppression
• DC motor drive circuits in automotive actuators
• On-board charger modules for EVs/HEVs
• Infotainment system power management

About TDK Electronics

TDK Electronics is a global leader in electronic solutions for automotive and industrial markets, with over 80 years of innovation in passive components. Their EPCOS brand (now integrated under TDK) sets industry benchmarks for reliability, particularly in harsh-environment applications requiring AEC-Q200 compliance.

TDK maintains rigorous quality control across all manufacturing stages, holding IATF 16949 certification for automotive components. This commitment to excellence ensures consistent performance in safety-critical systems, making TDK the preferred choice for Tier 1 automotive suppliers worldwide.

About Inrush Current Limiters

Inrush current limiters (ICLs) are vital PTC thermistor devices that protect circuits from damaging startup surges. When power is applied, their high initial resistance limits current flow; as they heat up during operation, resistance drops to minimize power loss. This self-regulating behavior prevents component stress without requiring external control circuits.

Automotive-grade ICLs like the B59412 series must withstand extreme temperature cycling, mechanical shock, and long-term vibration. Their fail-safe design ensures continued operation even after repeated surge events, making them essential for mission-critical vehicle electronics where component failure could compromise safety systems.

Packaging Options

Supplied in bulk packaging for streamlined assembly line integration. Contact PCX for custom reeled quantities or kitting services.

Frequently Asked Questions

Q: Is this ICL suitable for 48V automotive systems?
A: Yes, the B59412 series is designed for standard 12V/24V/48V automotive electrical systems.

Q: Does AEC-Q200 certification include thermal shock testing?
A: Yes, AEC-Q200 mandates 1,000 cycles of -55°C to +125°C thermal shock testing for this component grade.

Q: Can I use this in non-automotive industrial equipment?
A: Absolutely – its automotive-grade construction ensures superior reliability in any high-vibration environment.

Q: How does lead spacing impact PCB design?
A: The 5.00mm spacing accommodates standard automotive PCB trace clearances and facilitates automated assembly.

Q: What happens if the ICL fails?
A: PTC thermistors typically fail open-circuit, providing inherent circuit protection by interrupting current flow.

Q: Are RoHS/REACH certifications available?
A: Yes, TDK confirms full compliance with EU RoHS 3 and REACH regulations.

⚠️ Product images are representational. Exact specifications in datasheet prevail.

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