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TTElectronics - Welwyn WP4S3R9JA2 Power Resistor

The WP4S series encompasses compact, flameproof power wirewound resistors designed for high reliability in industrial applications. Features include excellent pulse handling capability, RoHS compliance with Pb-free terminations, and surface-mount options with Z-form leads. These resistors exhibit a power rating of 5 seconds overload at 25°C and are constructed on high purity ceramic substrates with interference-fit end caps. Terminations are made of hot tin dipped copper wire, meeting IEC standards for solderability and strength. Suitable for demanding environments, they resist solvents and do not emit incandescent particles under overload conditions, ensuring safe and long-lasting performance in power circuits.

Authorized Distributors
Source:Newark
Part No:WP4S-3R9JA2
Stock:720
Inv Date:06-09-2026
Price: Unit price: $1.28
Buy/RFQ:
Part No:WP4S-3R9JA2
Stock:0
Inv Date:06-10-2026
Price: N/A
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TTElectronics - Welwyn WP4S3R9JA2 Power Resistor Specifications:

  • Power rating at 25 °C: 5s overload rating
  • Resistance range: RO68 to 430R, ROS to 900R, RO1 to 2K2, RO15 to 6K8
  • Limiting element voltage: 50V to 150V
  • Resistance Tolerance: <20R: 5%, >20R: 1%, 2.5%
  • Thermal Impedance: 54 to 90 K/W
  • Ambient temperature range: -55°C to +155°C
  • Dimensions: Body length up to 28 mm, diameter 4.0 mm, lead diameter varies
  • Construction: Ceramic substrate, interference fit end caps, flameproof silicone coating
  • Terminations: Hot tin dipped copper wire, IEC compliant, solderable
  • Environmental Resistance: Solvent resistant, flameproof coating
  • Performance: Max load 1000 hrs @ 25°C, dry heat @ 200°C, pulse capacity up to 100W for brief durations
  • Application: Power circuits requiring high pulse handling, flameproof protection, and RoHS compliance

Buy the TT Electronics WP4S – Reliable Power Resistor for Industrial Applications

Secure your power projects with TT Electronics WP4S series resistors, offering high pulse handling, flameproof construction, and RoHS compliance. Suitable for industrial environments, these compact resistors feature ceramic substrates, interference-fit end caps, and tin-dipped copper terminations for excellent solderability and durability. They resist solvents and emit no incandescent particles under overload, ensuring safe operation. Ideal for power circuits demanding reliable pulse performance, flameproof protection, and long-term stability—order online today for fast delivery and trusted quality.

Order your TT Electronics WP4S power resistor today and ensure your power circuits are protected with high pulse capacity and flameproof reliability.

Frequently Asked Questions

Where can I buy TTElectronics - Welwyn WP4S3R9JA2?

You can click on the BUY or RFQ button to purchase WP4S3R9JA2 from an authorized TTElectronics - Welwyn distributor.

How do I troubleshoot issues or seek technical support for part WP4S3R9JA2?

You can download the WP4S3R9JA2 datasheet or visit the TTElectronics - Welwyn website for support.

Who is the manufacturer of WP4S3R9JA2?

TTElectronics - Welwyn

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