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Ohmite B12J40K Vitreous Enamel Power Resistor

Ohmite’s Brown Devil 200 Series is a robust power resistor known for its exceptional durability and performance. Constructed with all-welded components and a flame-resistant vitreous enamel coating, this resistor is ideal for demanding applications requiring high-temperature resistance. Its hollow-core design allows for rigid mounting, and it offers a self-supporting terminal mounting option for added convenience. Available in various wattage and resistance values, the Brown Devil provides reliable power dissipation in a compact form factor.

Authorized Distributors
Source:DigiKey
Part No:B12J40K
Stock:100
Inv Date:06-01-2026
Price: Unit price: $5.4
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Part No:B12J40K
Stock:0
Inv Date:06-02-2026
Price: N/A
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Part No:B12J40K
Stock:0
Inv Date:06-01-2026
Price: Unit price: $6.84
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Part No:B12J40K
Stock:50
Inv Date:06-01-2026
Price: Unit price: $9.65
Buy/RFQ:
Part No:B12J40K
Stock:50
Inv Date:06-01-2026
Price: Unit price: $9.65
Buy/RFQ:

Ohmite B12J40K Vitreous Enamel Power Resistor Specifications:

  • series: 200 Series
  • wattage: 12.0 W
  • ohms: 0.08-51K
  • lead_gauge: 18
  • max_voltage: 625 V
  • coating: lead-free vitreous enamel
  • core: Ceramic
  • terminals: Tinned axial; RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
  • derating: Linearly from 100% @ +25°C to 0% @ +350°C
  • tolerance_1ohm_plus: ±5%
  • tolerance_under_1ohm: ±10%
  • power_rating: Based on 25°C free air rating
  • overload: 10 times rated wattage for 5 seconds
  • temperature_coefficient_5ohms_under: ±400 ppm/°C
  • temperature_coefficient_above_5ohms: ±260 ppm/°C
  • max_amps: To calculate, use the formula √P/R

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Frequently Asked Questions

Where can I buy Ohmite B12J40K?

You can click on the BUY or RFQ button to purchase B12J40K from an authorized Ohmite distributor.

How do I troubleshoot issues or seek technical support for part B12J40K?

You can download the B12J40K datasheet or visit the Ohmite website for support.

Who is the manufacturer of B12J40K?

Ohmite

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