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WK73S3ATTE62LJ
KOA Speer Electronics, Inc.
RES 62M OHM 5% 1.5W 2512
2493 Pcs New Original In Stock
62 mOhms ±5% 1.5W Chip Resistor Wide 2512 (6432 Metric), 1225 Automotive AEC-Q200, Moisture Resistant Thick Film
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5.0 / 5.0
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WK73S3ATTE62LJ
Product Overview
3204777
DiGi Electronics Part Number
WK73S3ATTE62LJ-DGManufacturer
KOA Speer Electronics, Inc.
WK73S3ATTE62LJ
Description
RES 62M OHM 5% 1.5W 2512Inventory
2493 Pcs New Original In Stock
62 mOhms ±5% 1.5W Chip Resistor Wide 2512 (6432 Metric), 1225 Automotive AEC-Q200, Moisture Resistant Thick Film
Quantity
Minimum 1
Minimum 1
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WK73S3ATTE62LJ Technical Specifications
Category
Chip Resistor - Surface Mount
Packaging
Tape & Reel (TR)
Series
WK73S
Product Status
Active
Resistance
62 MOhms
Tolerance
±5%
Power (Watts)
1.5W
Composition
Thick Film
Features
Automotive AEC-Q200, Moisture Resistant
Temperature Coefficient
±200ppm/°C
Operating Temperature
-55°C ~ 155°C
Package / Case
Wide 2512 (6432 Metric), 1225
Supplier Device Package
1225
Ratings
AEC-Q200
Size / Dimension
0.122" L x 0.248" W (3.10mm x 6.30mm)
Height - Seated (Max)
0.028" (0.70mm)
Number of Terminations
2
Base Product Number
WK73S3A
Datasheet & Documents
HTML Datasheet
WK73S3ATTE62LJ-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
2019-WK73S3ATTE62LJTR
Standard Package
4,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Website updates and improvements are noticeable, reflecting a dedication to user experience.
Dec 02, 2025
Their post-purchase support was outstanding — they offered step-by-step assistance to help me set up my new purchase.
Dec 02, 2025
Delivery was quick and efficient, I didn't have to wait long.
Dec 02, 2025
Their on-time delivery service has saved me time and improved customer satisfaction in my repairs.
Dec 02, 2025
Their product quality consistently exceeds our expectations.
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Frequently Asked Questions (FAQ)
Can the WK73S3ATTE62LJ be used as a current sense resistor in a high-vibration automotive power module, and how does its AEC-Q200 rating impact long-term reliability under thermal cycling?
Yes, the WK73S3ATTE62LJ is well-suited for current sensing in high-vibration automotive environments due to its AEC-Q200 qualification, which validates performance under mechanical stress, thermal shock, and humidity. Its thick film construction and moisture-resistant coating enhance durability, but designers should still implement proper PCB mounting (e.g., avoid cantilevered traces) and consider thermal vias beneath the pad to mitigate solder joint fatigue during repeated -55°C to 155°C cycles. The ±200ppm/°C TCR may introduce minor resistance drift under large temperature swings, so calibration at operating extremes is recommended for precision applications.
What are the risks of replacing a Vishay WSL2512R0620FEA with the WK73S3ATTE62LJ in a 48V battery management system, despite both being 62mΩ, 1.5W, 2512-sized shunts?
While both resistors share similar electrical specs, the WK73S3ATTE62LJ uses thick film technology versus the WSL2512R0620FEA’s metal element construction, leading to higher inductance (~2–3nH vs. <1nH) and potentially worse transient response in fast-switching BMS circuits. Additionally, the KOA part has a ±200ppm/°C TCR compared to Vishay’s ±75ppm/°C, increasing measurement error over temperature. If your design relies on tight current accuracy across -40°C to 125°C, this substitution could push error margins beyond acceptable limits—validate with in-circuit testing or consider the lower-TCR WK73R series if available.
How does the moisture-resistant coating on the WK73S3ATTE62LJ affect reflow soldering profiles, and can it be safely processed in a lead-free SAC305 assembly line?
The WK73S3ATTE62LJ’s moisture-resistant thick film formulation is compatible with standard lead-free reflow profiles (peak ~260°C), and its MSL 1 rating means no bake-out is required before assembly—even after prolonged storage. However, due to its large thermal mass (6.30mm width), ensure adequate soak time (60–90 sec between 150–200°C) to prevent thermal gradients that could crack the substrate. Avoid exceeding 260°C peak temperature, as prolonged exposure near the limit may degrade the resistive layer over multiple cycles, especially in high-volume production with rework steps.
Is the WK73S3ATTE62LJ suitable for paralleling with another identical unit to achieve 31mΩ at 3W in a compact DC-DC converter layout, and what layout pitfalls should be avoided?
Paralleling two WK73S3ATTE62LJ resistors can achieve ~31mΩ and share 3W total power, but success depends heavily on symmetrical PCB layout. Unequal trace lengths or asymmetric thermal coupling will cause current imbalance, risking one resistor to overheat and fail prematurely. Place both devices on the same copper plane with matched Kelvin connections for sensing, and maintain >2mm spacing to avoid thermal coupling that reduces effective derating. Also, verify that the combined inductance doesn’t resonate with switching harmonics—use a ground plane beneath but avoid creating unintended loops.
Given the WK73S3ATTE62LJ’s ±5% tolerance, how should I compensate for initial resistance variation when designing a precision overcurrent protection circuit with a 100A threshold?
The ±5% tolerance means the actual resistance could range from 58.9mΩ to 65.1mΩ, translating to a ±5A error in a 100A threshold if uncalibrated. To mitigate this, use the WK73S3ATTE62LJ in a feedback-controlled system with a precision amplifier (e.g., INA240) and implement software calibration during production test—measure actual shunt voltage at a known load and store correction factors in non-volatile memory. Alternatively, select a tighter-tolerance variant if available (e.g., WK73R series with ±1%), or design the trip threshold with hysteresis and guard bands to accommodate worst-case resistance deviation without false triggers.
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.
WK73S3ATTE62LJ CAD Models
KOA Speer Electronics, Inc. WK73S3ATTE62LJ PCB symbols & footprints
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