Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
WR08X1333FTL
Walsin Technology Corporation
RES 133K OHM 1% 1/8W 0805
844 Pcs New Original In Stock
133 kOhms ±1% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Thick Film
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (320 Ratings)
WR08X1333FTL
Product Overview
9493846
DiGi Electronics Part Number
WR08X1333FTL-DGManufacturer
Walsin Technology Corporation
WR08X1333FTL
Description
RES 133K OHM 1% 1/8W 0805Inventory
844 Pcs New Original In Stock
133 kOhms ±1% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Thick Film
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
WR08X1333FTL Technical Specifications
Category
Chip Resistor - Surface Mount
Packaging
-
Series
WR
Product Status
Active
Resistance
133 kOhms
Tolerance
±1%
Power (Watts)
0.125W, 1/8W
Composition
Thick Film
Features
-
Temperature Coefficient
±100ppm/°C
Operating Temperature
-55°C ~ 155°C
Package / Case
0805 (2012 Metric)
Supplier Device Package
0805
Ratings
-
Size / Dimension
0.079" L x 0.049" W (2.00mm x 1.25mm)
Height - Seated (Max)
0.026" (0.65mm)
Number of Terminations
2
Datasheet & Documents
HTML Datasheet
WR08X1333FTL-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
1292-WR08X1333FTLTR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
每次購物後，DiGi Electronics的客服都會主動追蹤我的使用情況，提供專業的建議，使我感受到他們真正關心顧客。
de desembre 02, 2025
Their team’s expertise helps me optimize my DIY designs effectively.
de desembre 02, 2025
The packaging was designed with environmental impact in mind, and the delivery was impressively rapid.
de desembre 02, 2025
Post-sale support is always prompt, and their team is genuinely committed to customer satisfaction.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
What are the key reliability risks when using the WR08X1333FTL in high-humidity environments, and how can I mitigate them despite its MSL 1 rating?
Although the WR08X1333FTL has an MSL 1 (unlimited floor life) rating, indicating low moisture sensitivity, thick-film resistors like this one can still experience long-term resistance drift or corrosion in sustained high-humidity (>85% RH) or condensing environments due to ionic contamination or electrode oxidation. To mitigate risk, apply a conformal coating (e.g., acrylic or silicone-based) over the resistor and surrounding PCB area, ensure proper solder mask coverage, and avoid placing the WR08X1333FTL near board edges or high-capacitance nodes where moisture ingress is more likely. Consider derating power by 20–30% in such conditions to reduce localized heating that can accelerate degradation.
Can I replace a Vishay CRCW0805133KFKTA with the WR08X1333FTL in a precision feedback network without recalibrating the system?
While both the Vishay CRCW0805133KFKTA and the WR08X1333FTL are 133 kΩ, 1%, 0805 thick-film resistors, direct replacement may introduce subtle performance differences due to the Vishay part’s tighter typical temperature coefficient (±50 ppm/°C vs. ±100 ppm/°C for the WR08X1333FTL) and potentially better long-term stability. In high-gain or precision analog circuits (e.g., op-amp feedback networks), even small TC mismatches can cause output drift over temperature. We recommend validating thermal behavior across the operating range or selecting the WR08X1333FTL only if system calibration can compensate for drift—otherwise, stick with the lower-TC Vishay alternative for critical paths.
How does the power derating curve of the WR08X1333FTL affect its use in automotive under-hood applications where ambient temperatures exceed 125°C?
The WR08X1333FTL is rated for operation up to 155°C, but its 0.125W power rating applies only at 70°C or below. Above that, you must derate linearly—typically to zero power at 155°C. In under-hood automotive environments where PCB temps can reach 130–140°C, the usable power dissipation drops to near 10–20% of nominal (≈12–25 mW). For a 133 kΩ resistor, this limits continuous current to roughly 0.3–0.43 mA. If your design pushes higher currents (e.g., in voltage dividers for sensor biasing), consider using a larger package (1206) or a thin-film alternative with better high-temp stability to avoid premature aging or resistance shift.
Is the WR08X1333FTL suitable for 48V telecom bus voltage dividers, and what layout precautions should I take to prevent surface arcing?
The WR08X1333FTL has no explicit voltage rating listed, but as an 0805 thick-film resistor, its practical working voltage limit is typically ~150–200V DC. In a 48V system, voltage stress is not the primary concern; however, in high-humidity or polluted environments, surface tracking can occur between terminals. Maintain a minimum creepage distance of ≥1.5 mm between resistor pads, use a solder mask dam, and avoid placing the WR08X1333FTL near high-impedance nodes without guard rings. For added safety in telecom applications, consider conformal coating and verify isolation resistance post-assembly—especially if the divider feeds high-impedance ADC inputs where leakage currents matter.
When paralleling two WR08X1333FTL resistors to achieve 66.5 kΩ, how does tolerance stacking and thermal coupling impact actual circuit performance?
Paralleling two WR08X1333FTL resistors yields a nominal 66.5 kΩ, but due to ±1% tolerance, the actual combined resistance can range from ~65.8 kΩ to 67.2 kΩ—worse than a single 0.5% part. More critically, if the resistors are placed close together, thermal coupling can cause mutual heating, shifting resistance values asymmetrically due to their ±100 ppm/°C TC. This creates dynamic imbalance in precision applications like differential amplifiers or current sensing. To minimize risk, space the resistors apart, use a single 0603 or 0805 66.5 kΩ ±0.5% thin-film resistor instead, or select WR08X1333FTL units from the same batch to improve matching—but never rely on paralleling for precision without empirical validation across temperature.
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.
WR08X1333FTL CAD Models
Walsin Technology Corporation WR08X1333FTL PCB symbols & footprints
productDetail
