1206 Package 1.1Ω 0.5W High Power Thick Film Chip Resistor for Current Limiting

CRH1206F1R10P05Z | 1206 1.1R 0.5W Ever Ohms High Power Thick Film Chip Resistor

Product Overview

CRH1206F1R10P05Z is the standard orderable part number in the CRH high-power thick film chip resistor series from Ever Ohms Technology (TA-I). Commonly referred to in the industry as the "1206 1.1R 0.5W Ever Ohms resistor," it comes in an EIA 1206 (metric 3216) package with a nominal resistance of 1.1Ω, a tolerance of ±1%, and a rated power of 0.5W at 70°C ambient. Compared with the 0.25W ceiling of conventional 1206 thick film resistors, this Ever Ohms resistor doubles the power-handling capability in the same footprint. It can replace ordinary 1206 resistors in place without PCB re-layout, making it a practical choice for current limiting, soft-start, current sensing, and discharge circuits.

Part Number Breakdown

Writing only "1206 1.1R 0.5W" in a BOM risks mis-supply of J-tolerance or standard-power versions. Always use the full part number CRH1206F1R10P05Z when sourcing this Ever Ohms resistor.

Key Electrical Parameters

Values below are compiled from the Ever Ohms CRH series public specifications; verify against the latest official datasheet before mass production.

For a low value like 1.1Ω, the real operating limit is set by I²R heating rather than voltage rating. From RCWV=√(P×R), the continuous working voltage ceiling at 0.5W is only about 0.74V — far below the 200V device rating. Design checks should therefore focus on steady-state dissipation and pulse energy.

Construction & Process Features

• Substrate & resistive element: 96% alumina ceramic substrate with ruthenium-based metal oxide thick film paste, fired at high temperature; outer glass glaze protects against moisture and dust.
• Optimized heat path: Resistor area and termination layout are tuned so heat spreads efficiently into the terminations and PCB copper — the reason a 1206 can deliver 0.5W.
• Termination structure: Ni barrier plus lead-free tin outer layer gives good sulphur and electro-migration resistance, reducing open-circuit failures in sulphur-bearing industrial environments and inside battery packs.
• Soldering compatibility: Suitable for lead-free reflow and wave soldering; pick-and-place yield, tombstoning and offset behavior match ordinary 1206 parts — no reflow profile change needed.
• Compliance: Meets RoHS 2.0 (2011/65/EU) and REACH requirements.

Why CRH Instead of the Standard CR Series

• Double the power: 0.25W → 0.5W in the same 1206 footprint, avoiding an upgrade to 1210/1812 and saving board space.
• Lower temperature rise: At equal dissipation, temperature rise and resistance drift are smaller, improving sensing and divider stability.
• Better pulse capability: The thick-film body and ceramic substrate absorb higher pulse energy from motor starts, relay pull-ins and power-up surges.
• Unchanged mass & footprint: No impact on mechanical design or weight budgets.

Typical Applications

• Switch-mode power supplies & adapters: output soft-start current limiting, dummy loads, MOSFET gate discharge, auxiliary current sensing.
• LED drivers & lighting: current-feedback sensing and surge-absorption branch current limiting.
• Industrial control: PLC digital-input current limiting, inverter/servo drive protection, sensor supply dividers.
• Battery & energy storage: BMS charge/discharge pre-charge limiting, balancing branches, pack-internal sensing.
• Automotive electronics: onboard DC-DC, OBC auxiliary circuits, body control modules (confirm vehicle-grade qualification of specific lots with the manufacturer or distributor).
• Appliances & consumer electronics: air-conditioner and refrigerator control boards, high-current branches on mainboards.

Application Notes

• Derating is mandatory. The 0.5W rating assumes 70°C ambient; above that, power must be derated linearly to zero at 155°C. Re-calculate available power for enclosed enclosures or still-air conditions.
• Keep margin. Select for 1.5–2× margin on steady-state dissipation; for pulsed operation consult the datasheet's pulse power curve, not just average power.
• Provide thermal relief. Copper pours under the pads with vias to inner layers significantly cut temperature rise; keep adjacent heat sources spaced apart.
• Use Kelvin routing for low-value sensing. With 1.1Ω in a current-sense path, four-wire Kelvin traces minimise errors from pad copper resistance.
• Check voltage rating. 200V suffices for low-voltage supplies; for AC input sides or high-voltage buses, choose a dedicated high-voltage series instead of relying on package size.
• Inspect incoming goods. Verify original labels and reel markings (part number, value, tolerance, lot); sample-test resistance and request RoHS reports where needed.

Substitutes & Cross-References

CRH1206F1R10P05Z directly replaces same-value, same-tolerance standard-power CR1206 parts (0.25W) as an upward-compatible swap; the reverse requires a full power re-check. When cross-referencing brands, search by "1206 1.1Ω 0.5W ±1% high-power thick film" and compare the temperature basis of the power rating, TCR, overload capability and lead time — not unit price alone.

Where to Buy

The CRH series is a commodity line, but mixed lots, remarking and tolerance substitution do occur in the market. Buy through channels with original manufacturer authorisation and check certificates, lot traceability and stock status.

Shenzhen Shunhai Technology Co., Ltd.

Shunhai Technology is an authorised distributor of Ever Ohms (TA-I) in mainland China, covering sales and service for the full Ever Ohms product range with continuously renewed authorisation. Based in Baoneng Technology Park, Longhua, Shenzhen, the company stocks alloy resistors, precision resistors, chip resistors, fuses, capacitors, inductors and discrete devices. For CRH1206F1R10P05Z and other Ever Ohms resistors, Shunhai supplies original parts, supports small-batch prototyping and volume orders, and provides selection guidance, cross-reference matching, lead-time confirmation and one-stop BOM kitting — suitable from R&D sampling through to mass production.

Huanian Mall

Huanian Mall is Shunhai Technology's online procurement platform, where you can search Ever Ohms resistor part numbers, view real-time stock and tiered pricing, and place enquiries and orders online with multiple payment options and global delivery. It suits quick price comparison, small-batch top-ups and one-stop BOM purchasing.

Before ordering, confirm three items: tolerance requirement (±1% or ±5%), packaging (full reel of 5000 pcs or loose parts), and whether the original datasheet and environmental reports are required — this cuts down back-and-forth communication.