CRH1206F330KP05Z High Power Thick Film Chip Resistor 330kΩ 0.5W ±1% Tolerance

CRH1206F330KP05Z Full Parameter Guide: 1206 330K 0.5W Ever Ohms High-Power Thick Film Chip Resistor
CRH1206F330KP05Z is a high-power thick film chip resistor from Ever Ohms' CRH series — 1206 (3216 metric) package, 330kΩ nominal resistance, ±1% tolerance, and 0.5W rated power at 70°C. It delivers twice the power of a standard 1206 resistor (0.25W) in the same footprint, making it a common choice in SMPS voltage dividers, LED drivers, industrial control boards, and inverter snubber or bleed circuits.

1. Part Number Decoded

Equivalent notations include CRH1206J330KP05Z (±5%) and CRH1206F3302P05Z (four-digit code). Always specify the full part number in your BOM to prevent tolerance or power mis-substitution during procurement.

2. Key Electrical Parameters

3. Why the Working Voltage Is 200V, Not 406V

RCWV = √(P×R) = √(0.5 × 330,000) ≈ 406V. However, the component's own voltage ceiling applies: CRH1206 is rated at 200V max working / 400V max overload. Taking the lower of the two gives a practical continuous working voltage of 200V. In high-voltage divider or bus-sampling circuits, this voltage limit is often reached before the power limit — verify it separately.
Current at rated power: √(0.5/330,000) ≈ 1.23mA. As a design rule, keep steady-state dissipation within 50%–60% of rating (0.25W–0.3W) to allow margin for temperature rise and surge events.

4. Power Derating

Power is rated at 70°C and must be derated linearly above that, reaching zero at 155°C:
Allowable power ratio = (155 − Ta) / (155 − 70)
Ta = 85°C → ~82%
Ta = 105°C → ~59%
Ta = 125°C → ~35%
Inside sealed enclosures or near transformers and MOSFETs, board temperature often exceeds ambient by 20°C–40°C. Always derate against measured board temperature, not room temperature. Providing copper pad area under the component and avoiding tight side-by-side placement of two 0.5W resistors noticeably improves long-term drift performance.

5. Mechanical Dimensions & Soldering

• CRH1206 outline: 3.05±0.10 mm (L) × 1.60±0.20 mm (W) × 0.55±0.15 mm (H)
• End band references: l1 ≈ 0.40mm, l2 ≈ 0.50mm
• Land pattern: IPC-7351 standard 1206 footprint; enlarge copper area when operating near full power
• Soldering: Reflow compatible (Pb-free profile, peak generally ≤260°C)
• Packaging: Tape & reel, 1206 typically 5,000 pcs/reel

6. Reliability Highlights

• Better surge capability than standard 0.25W 1206 — larger film area and substrate thermal mass suit high-voltage inrush conditions in divider networks.
• Low drift — ±100ppm/°C with ±1% tolerance keeps resistance stable across −55°C to +125°C, ideal for feedback dividers and voltage sensing.
• Long-term stability — chemically stable thick film with minimal aging drift.
• Compliance — Z suffix denotes Pb-free/halogen-free construction meeting RoHS and REACH requirements.

For sulfur-rich environments (rubber seals, certain battery packs) or high-humidity/salt mist conditions, switch to Ever Ohms' sulfur-resistant series; for higher pulse endurance, consider metal film or current-sense alloy options. At 330kΩ this part is not suited to current sensing — its natural roles are high-voltage dividing, bleed/discharge resistors, pull-up/pull-down, LED current limiting, and power-supply feedback networks.

7. Substitution Rules

• Do not replace it with a standard 1206 0.25W part: same size but half the power headroom leads to premature failure under full load.
• Check three items together: resistance & tolerance, rated power & derating curve, and maximum working voltage.
• If a BOM only states "1206 330K 1/2W" without a series name, it generally maps to a high-power thick film type such as CRH1206F330KP05Z — confirm the series code with your supplier before ordering.
• Avoid 1206 packages in RF or high-frequency loops due to parasitic L and C.

8. Where to Buy: Authorized Ever Ohms Distributors

Genuine parts, traceable lots, and stable lead times matter most when sourcing resistors. As a widely used high-power value, CRH1206F330KP05Z circulates heavily in the market — which also means mixed batches and remarking risks exist. Buy through authorized channels and request distributor certificates plus COC/RoHS reports.
Shenzhen Shunhai Technology Co., Ltd. — an authorized Ever Ohms distributor holding a valid distributor certificate, covering the full Ever Ohms range of thick film, thin film chip resistors, alloy resistors, and metal film resistors. Shunhai provides genuine-product assurance, complete part coverage, sample-to-production support, and help with part selection and cross-reference evaluation.
HuaNian Mall — an online components marketplace where you can check stock and pricing for CRH1206F330KP05Z and other Ever Ohms resistors in real time. Transparent pricing and inventory make it well suited to quick comparison, top-up orders, and small-batch prototyping.
A practical approach: verify stock and price on HuaNian Mall first, then secure factory-batch supply and technical support through Shunhai. For volume pricing, long-term stocking, or official datasheets and reliability reports, go directly to the authorized distributor.

9. FAQ

1. Q: Can CRH1206F330KP05Z be connected directly to a 380V AC bus?
   A: No. Its max working voltage is 200V, while the rectified 380VAC peak exceeds 500V. Use multiple resistors in series or a dedicated high-voltage series instead.
2. Q: Are 330K and 3302 the same value?
   A: Yes — both are 330kΩ. The letter code is common in E24 notation; the four-digit code appears more often with E96 precision parts.
3. Q: Is this AEC-Q200 qualified?
   A: The CRH series targets consumer, appliance, industrial, and power applications. Confirm automotive qualification for specific part numbers with the manufacturer or authorized distributor; do not assume.
4. Q: What is the upper temperature limit?
   A: The component operates from −55°C to +155°C, but the power rating is anchored at 70°C and must be derated above that point.

Parameters above are compiled from the Ever Ohms CRH series public specifications. Final values should be confirmed against the latest official datasheet and order specification — request the formal datasheet and test reports from your distributor before design-in.