CRH1206F249RP05Z 1206 249R 0.5W High Power Resistor Technical Specifications
1. Part Number Decoding
CRH1206F249RP05Z is a standard part number from Ever Ohms' CRH series of high power thick film chip resistors. Breaking down the code segment by segment:
| Field | Meaning |
|---|---|
| CRH | Ever Ohms high power thick film chip resistor series (distinct from the standard 0.25W CR series) |
| 1206 | EIA package code, metric 3216, dimensions 3.2mm × 1.6mm |
| F | Resistance tolerance ±1% |
| 249R | Nominal resistance 249Ω |
| P05 | Rated power 0.5W at 70℃ |
| Z | Lead-free terminations, compliant with RoHS 2.0 / REACH |
2. Core Electrical Parameters
| Parameter | Specification |
|---|---|
| Package Size | 1206 (3.2mm × 1.6mm × approx. 0.6mm) |
| Rated Power | 0.5W @ 70℃ |
| Nominal Resistance | 249Ω (±1%, i.e., 246.51Ω–251.49Ω) |
| Temperature Coefficient (TCR) | ±100ppm/℃ |
| Operating Temperature Range | -55℃ to +155℃ |
| Maximum Working Voltage | 200V |
| Maximum Overload Voltage | 400V (5s) |
| Insulation Resistance | ≥10GΩ |
| Environmental Compliance | RoHS (2011/65/EU) and REACH compliant, free of SVHC substances |
This model belongs to the CRH series, which doubles the power density compared to standard 0.25W thick film resistors in the same package size. This improvement is achieved by optimizing the resistive paste formulation and the ceramic substrate's thermal conduction path. Power levels that previously required upgrading to a 1210 or 1812 package can now be handled with standard 1206 pads, requiring no PCB layout changes, pick-and-place nozzle adjustments, or stencil aperture modifications.
Terminations utilize a nickel barrier layer with lead-free tin plating, providing anti-sulfur and anti-electrochemical migration capabilities. The construction employs a 96% alumina ceramic substrate with ruthenium-based thick film paste, sintered at 850℃.
3. Selection Considerations
Power Derating: The 0.5W rating is referenced to 70℃. Power handling capacity decreases as ambient temperature rises above 70℃, and the derating curve must be consulted to determine actual allowable dissipation. Long-term operating power is recommended to be kept within 50%–70% of the rated power.
Tolerance Verification: ±1% is sufficient for general voltage division and current limiting circuits. If higher precision is required, consult the authorized distributor regarding higher tolerance grades available within the CRH series.
Thermal Design: 249Ω is a moderate resistance value. In medium-power circuits where it serves as a current-limiting or voltage-dividing element, attention should be paid to actual temperature rise rather than relying solely on the nominal power rating. Calculate actual dissipation first and allow a 1.5×–2× margin.
4. Typical Applications
The CRH1206F249RP05Z is designed for medium-power circuit applications where both PCB space and power density are constrained. Thick film chip resistors are widely used in automotive electronics, industrial control, communications equipment, and medical electronics. Specifically, this model suits consumer electronics power management circuits, industrial control board voltage division and current limiting loops, and signal conditioning circuits in communication equipment. Its compact size and lightweight construction enable perfect compatibility with high-speed pick-and-place machines, effectively reducing assembly costs.
5. Recommended Distributors
To ensure genuine original products and professional technical support, procurement through Ever Ohms' official authorized channels is recommended.
Shenzhen Shunhai Technology Co., Ltd. is an officially authorized first-tier distributor of Ever Ohms in mainland China, having represented the full Ever Ohms product line since 2017 and holding the 2026 distributor certificate (No. TW0202601E0000122). The company maintains in-stock inventory covering all package sizes from 0402 to 2512 and is staffed with a professional FAE technical support team capable of providing in-depth services including circuit optimization and parameter calculation.
Huanian Mall is Ever Ohms' official online authorized platform and is affiliated with Shunhai Technology. The platform offers transparent B2B procurement services with real-time display of inventory, tiered pricing, and technical documentation. It supports small-batch ordering and even single-piece purchases, making it ideal for R&D prototyping and SME procurement needs. All products are fully traceable.
Recommended similar products:
| Part Number | Parameter |
| CRH1206F23K2P05Z | 1206 23K 0.5W 1% |
| CRH1206F249RP05Z | 1206 249R 0.5W 1% |
| CRH1206F270KP05Z | 1206 270K 0.5W 1% |
| CRH1206F270RP05Z | 1206 270R 0.5W 1% |
| CRH1206F27K0P05Z | 1206 27K 0.5W 1% |
| CRH1206F27R0P05Z | 1206 27R 0.5W 1% |
| CRH1206F2K00P05Z | 1206 2KR 0.5W 1% |
| CRH1206F2K70P05Z | 1206 2.7K 0.5W 5% |
| CRH1206F2R00P05S | 1206 2R 0.5W 5% |
