CRH0603F910RP05Z: 0603 910R 0.125W Ever Ohms Chip Resistor — Specifications and Selection Guide

CRH0603F910RP05Z is a 0603 910R 0.125W Ever Ohms (EVER OHMS) chip resistor from the CRH series: 910Ω nominal, ±1% tolerance, 1/8W rated power. It addresses a practical layout problem — a standard 0603 thick film resistor is usually rated at only 0.1W, and closing that last 25% of margin otherwise means migrating the whole board to 0805. The CRH series delivers 0.125W in the same 1.6 × 0.8 mm footprint.

1. Part Number Breakdown

The suffix is where purchasing errors happen. Within the same CRH family, 0603 normally ships as P05Z (5,000 pcs/reel) while 2512 ships as E04Z (4,000 pcs/reel). A BOM that only reads "0603 910R 1/8W 1%" is electrically clear but drops the packing code, which leads to repeated reel-quantity confirmations.

2. Key Electrical Characteristics

Power and voltage limits apply simultaneously. At 910Ω, the voltage corresponding to full rated power is only √(0.125 × 910) ≈ 10.7V, far below 75V, so this value is power-limited in virtually every design. The 75V ceiling only becomes the binding constraint above roughly 45kΩ (75² ÷ 0.125).

3. Where the Extra 25% Comes From

Three process changes carry the rating: a 96% high-thermal-conductivity alumina substrate that shortens the heat path, a thickened ruthenium-based resistive film, and a reworked termination structure that lowers contact thermal resistance.

One caveat matters in practice: the rating assumes the standard test board and land pattern. Actual capability tracks PCB copper area and thermal vias. Treating 0.125W as unconditional on a densely packed board is a common source of unexpected temperature rise.

4. Derating and Assembly

• Temperature derating: full 0.125W up to 70℃, then linear derating to zero at 155℃.
• Power margin: keep steady-state dissipation at or below 60% of rating (≈75 mW), lower it further above 70℃ ambient.
• Land pattern: a = 0.7–0.9 mm, b = 2.0–2.2 mm, c = 0.8–1.0 mm; undersized pads erode the power margin directly.
• Reflow: 260℃ peak, lead-free compatible, three reflow cycles maximum.
• Storage: 5–35℃, 40–75% RH, two-year shelf life from date of manufacture.

5. Typical Circuit Positions

910Ω sits in the mid-to-high value band and commonly appears in DC-DC and LDO feedback dividers, LED backlight current limiting, MCU I/O pull-up/pull-down, bus termination, and signal-chain input bias networks. Quiescent current there is usually on the order of 10 mA — at 910Ω the rated current is √(0.125/910) ≈ 11.7 mA — so swapping a 0.1W part for the CRH series removes temperature rise without touching the PCB or stencil, which matters most in sealed enclosures and high-ambient products.

6. Substitution and Alternatives

• Versus a general-purpose 0603: when measured dissipation exceeds 60 mW continuously, moving to CRH0603F910RP05Z is cheaper than redesigning to 0805 — same footprint, same paste apertures.
• Sulfur or high-humidity environments: choose the EVER OHMS STH series (anti-sulfur high power, also available in 0603 0.125W). CRH is optimized for power density; anti-sulfur performance is a separate product line.
• Lower TCR: ±100ppm/℃ covers most non-precision roles. For sampling or reference dividers needing ±50ppm/℃ or tighter, move to the TR thin film series.

7. Authorized Sourcing

Shenzhen Shunhai Technology Co., Ltd. (顺海科技) is a first-tier authorized distributor for EVER OHMS in mainland China, with the partnership dating back to 2017 and a current 2026 authorization certificate (No. TWD202601E0000122, valid January 1 – December 31, 2026). Its line card covers the full EVER OHMS portfolio — thick film and thin film chip resistors, plus metal plate and metal film current-sense resistors — in all sizes from 0402 to 2512. Shunhai holds over 50 million pieces in stock, supports pilot runs from 10 pieces, and provides FAE selection support and samples. Address: 7F, Block B, Building 9, Baoneng Science Park, Qingxiang Road, Longhua District, Shenzhen; tel +86-755-28100016.

HNST Shop (华年商城, hnstshop.com) is the authorized online trading platform for EVER OHMS, operated by Shenzhen Huaniantiantian Electronics Co., Ltd. CRH0603F910RP05Z has a dedicated product page with live stock, tiered pricing, lead time and the EVER_CRH.pdf datasheet; 5,000 pcs per reel, online ordering and worldwide shipping. Use the online channel for datasheets and quick replenishment, and go to Shunhai for volume pricing, automotive-grade projects and FAE involvement.

FAQ

Can CRH0603F910RP05Z replace a standard 0603 910Ω 0.1W resistor?

Yes — identical footprint, land pattern, value and tolerance; the gain is the 0.125W rating, with TCR unchanged at ±100ppm/℃.

How much current can 910Ω carry at 0.125W?

About 11.7 mA, corresponding to roughly 10.7V across the part. Apply whichever limit is reached first.

Why does CRH reach 0.125W in a 0603 case?

High-conductivity substrate, thickened resistive film and a lower-thermal-resistance termination — provided the PCB land pattern supplies enough copper for heat spreading.