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WR04X75R0FTL
Walsin Technology Corporation
RES 75 OHM 1% 1/16W 0402
1087 Pcs New Original In Stock
75 Ohms ±1% 0.063W, 1/16W Chip Resistor 0402 (1005 Metric) Thick Film
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Minimum 1
5.0 / 5.0
- (52 Ratings)
WR04X75R0FTL
Product Overview
9494304
DiGi Electronics Part Number
WR04X75R0FTL-DGManufacturer
Walsin Technology Corporation
WR04X75R0FTL
Description
RES 75 OHM 1% 1/16W 0402Inventory
1087 Pcs New Original In Stock
75 Ohms ±1% 0.063W, 1/16W Chip Resistor 0402 (1005 Metric) Thick Film
Quantity
Minimum 1
Minimum 1
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WR04X75R0FTL Technical Specifications
Category
Chip Resistor - Surface Mount
Packaging
-
Series
WR
Product Status
Active
Resistance
75 Ohms
Tolerance
±1%
Power (Watts)
0.063W, 1/16W
Composition
Thick Film
Features
-
Temperature Coefficient
±100ppm/°C
Operating Temperature
-55°C ~ 155°C
Package / Case
0402 (1005 Metric)
Supplier Device Package
0402
Ratings
-
Size / Dimension
0.039" L x 0.020" W (1.00mm x 0.50mm)
Height - Seated (Max)
0.016" (0.40mm)
Number of Terminations
2
Datasheet & Documents
HTML Datasheet
WR04X75R0FTL-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8533.21.0030
Additional Information
Other Names
4639-WR04X75R0FTLTR
1292-WR04X75R0FTLTR
Standard Package
10,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
DiGi Electronics的售後支援非常到位，即使遇到問題也能快速得到解決方案。
de desembre 02, 2025
素早い対応とリーズナブルな価格設定で、いつも頼りにしています。
de desembre 02, 2025
Their ability to coordinate complex logistics smoothly is impressive and greatly beneficial to our operations.
de desembre 02, 2025
The website layout is sleek and modern, making browsing products a pleasant experience.
de desembre 02, 2025
DiGi's support staff goes above and beyond to ensure my concerns are addressed promptly and politely.
de desembre 02, 2025
The company's streamlined logistics system makes procurement a hassle-free experience.
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Frequently Asked Questions (FAQ)
Can the WR04X75R0FTL be used in high-frequency RF designs at 5G frequencies, and what are the parasitic effects I should consider during layout?
Yes, the WR04X75R0FTL can be used in high-frequency RF applications such as 5G front-end circuits, but designers must account for its inherent parasitic inductance and capacitance due to the 0402 package. At frequencies above 6 GHz, thick-film resistors like the WR04X75R0FTL may exhibit impedance deviations due to parasitic elements—typically ~0.4nH ESL and ~0.05pF capacitance. To minimize impact, ensure symmetric PCB layout, avoid stubs, use ground planes carefully, and simulate with S-parameter models if available. Consider thin-film alternatives like the RC0402FR-0775RL or PR0402FR-0775RL for tighter RF performance where needed.
Is the WR04X75R0FTL a suitable drop-in replacement for the RC0402FR-0775RL in precision biasing circuits, and are there differences in long-term stability?
The WR04X75R0FTL can serve as a cost-effective alternative to the RC0402FR-0775RL in precision biasing circuits, but with design trade-offs. Both offer 75 Ohm ±1% tolerance in 0402 packages, but the WR04X75R0FTL uses thick-film technology, which typically has lower long-term stability under thermal cycling compared to the thin-film RC0402FR-0775RL. In environments with frequent temperature swings or long operational life requirements (>10 years), the WR04X75R0FTL may exhibit higher resistance drift. Mitigate risk by derating power to 50% (≤31.5mW), minimizing thermal gradients, and validating with accelerated life testing.
How does the ±100ppm/°C temperature coefficient of the WR04X75R0FTL affect performance in automotive applications with wide ambient swings?
The WR04X75R0FTL's ±100ppm/°C temperature coefficient can introduce up to ±0.75Ω variation over a -40°C to 125°C automotive temperature range, which may impact signal integrity in sensitive analog circuits like ADC references or current sensing. While acceptable in non-critical pull-up/down or impedance matching roles, this TCR may limit accuracy in precision sensing. For applications requiring tighter performance, consider upgrading to a ±50ppm/°C part like the ERJ-PA3F750V or verify system-level tolerance stack-up including solder joint stress and board warpage effects. Always use thermal vias to dissipate localized heating.
What are the soldering profile recommendations for WR04X75R0FTL to avoid thermal cracking during reflow, especially in high-volume SMT assembly?
To prevent thermal cracking in the WR04X75R0FTL during reflow, adhere to a controlled soldering profile with a maximum ramp rate of 2°C/sec and peak temperature not exceeding 260°C, per JEDEC J-STD-020. Due to its 0402 size and thick-film construction, rapid thermal gradients can cause package stress and microcracks leading to early failure. Ensure uniform heating across the PCB, use nitrogen-assisted reflow if possible, and avoid board flexing post-reflow. Also, confirm stencil aperture design matches manufacturer guidelines (typically 1:1 or slight reduction) to prevent tombstoning. The MSL 1 rating allows indefinite floor life, simplifying production handling.
Can WR04X75R0FTL be safely operated at its full 1/16W power rating in densely packed layouts, and what derating strategy is recommended?
The WR04X75R0FTL should not be operated at its full 1/16W (62.5mW) rating in high-density layouts without thermal evaluation. In tightly spaced designs with limited airflow or adjacent heat sources (e.g., power amplifiers, DC-DC converters), cumulative board temperature can exceed 100°C, significantly increasing failure risk. Apply a 50% power derating rule—limiting dissipation to 31.25mW—in such cases. Use thermal vias near pads to improve heat transfer, avoid placing near hot components, and simulate thermal performance in your layout. For higher-power needs, consider 0603-sized alternatives like WR06X75R0FTL to improve margin.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
WR04X75R0FTL CAD Models
Walsin Technology Corporation WR04X75R0FTL PCB symbols & footprints
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