I. Product Overview
The MHTC1206 Series Current Sensing Resistors are high-precision electronic components designed with a metal strip structure. Featuring long electrodes, two terminals, and no side electrodes, they have a size specification of 0.12×0.06 inches, specifically engineered for accurate current detection scenarios. Adopting MnCu alloy as the core material and advanced manufacturing processes, this series offers outstanding advantages such as low resistance, high precision, and high reliability, making it widely applicable in various electronic devices and circuit systems that require precise current monitoring.
II. Product Model Explanation
The product model of the MHTC1206 Series consists of five parts, with each part indicating the following:
1. Series Number (MHTC1206): Represents long electrodes, two terminals, no side electrodes, and a size of 0.12×0.06 inches;
2. Material (M): Made of MnCu alloy to ensure stable resistor performance;
3. Power Rating: For example, 1W0 indicates 1.0 Watt, and 1W5 indicates 1.5 Watts, specifying the power-bearing capacity of the product;
4. Nominal Resistance Value: Marked in a specific format, such as 1.5mΩ marked as 1M50 and 2mΩ marked as R002, intuitively showing the nominal resistance;
5. Resistance Tolerance: F represents ±1%, and G represents ±2%, clearly indicating the precision grade of the resistor.
III. Core Parameters and Specifications
(I) Physical Dimensions (Unit: mm)
| Product Model | Width (W) | Length (L) | Thickness (T) | Electrode Spacing (A) |
| MHTC1206M1W0-Series R001 | 3.20±0.25 | 1.60±0.25 | Max 0.45 | 0.35±0.15 |
| MHTC1206M1W0-Series 1M50~R005 | 3.20±0.25 | 1.60±0.25 | Max 0.40 | 0.35±0.15 |
(II) Electrical Characteristics
| Product Model | Resistance Value (mΩ) | Power Rating (Watt) | Resistance Tolerance (%) | TCR (ppm/℃) |
|---|---|---|---|---|
| MHTC1206M1W0-Series R001~R005 | 1~5 | 1.0 | ±1%(F) | ±50 |
(III) Structure and Materials
1. Substrate: Epoxy, providing stable support;
2. Adhesive: Epoxy, ensuring firm bonding of each structural layer;
3. Resistive Element: Cu-alloy, guaranteeing stable resistance performance;
4. Terminal Electrode: Sn, Ni, Cu, offering excellent conductivity and solderability;
5. Protective Coating: Green flame-retardant epoxy, meeting UL-94-V0 requirements, effectively protecting the component;
6. Marking Coating: White flame-retardant epoxy, meeting UL-94-V0 requirements, clearly displaying product identification.
(IV) Environmental Characteristics
1. Operating Temperature Range: -55℃~155℃, adapting to various working environments;
2. Storage Conditions: Can be stored for 2 years in an airtight environment with a temperature of +10℃~40℃ and relative humidity ≤75%; can be stored for a maximum of 30 days without dew in an environment with a temperature of +10℃~60℃ and relative humidity of 95%.
IV. Product Characteristics and Reliability
The MHTC1206 Series Current Sensing Resistors have undergone a series of rigorous tests to ensure stable performance under various working conditions:
1. Short Time Over Load Test: At 25±2℃, apply 2.5 times the rated power for 5 seconds, the resistance change ≤±(1.0%+0.5mΩ), complying with IEC60115-1 4.13 standard;
2. High/Low Temperature Test: Expose to -55±2℃ (low temperature) and 155±2℃ (high temperature) for 1000 hours respectively, the resistance change ≤±(1.0%+0.5mΩ) in both cases, complying with IEC60115-1 4.25 standard;
3. Moisture Load Life Test: Under the environment of 60±2℃ and 95% relative humidity, load with rated voltage, cycle 90 minutes on and 30 minutes off for 1000 hours, the resistance change ≤±(2.0%+0.5mΩ), complying with IEC60115-1 4.25 standard;
4. Thermal Shock Test: Undergo 100 cycles of -55℃ (30min) → R.T. (3min) → +155℃ (30min) → R.T. (3min), the resistance change ≤±(1.0%+0.5mΩ), complying with IEC60115-1 4.19 standard;
5. Solderability Test: Dip into solder at 245±5℃ for 3±0.5 seconds, the solder coverage area >95%, complying with IEC60115-1 4.17 standard;
6. Mechanical Shock Test: After withstanding a shock of 100G acceleration and 6ms amplitude time, the resistance change ≤±(1.0%+0.5mΩ), complying with IEC60115-1 4.21 standard.
V. Soldering and Packaging Specifications
(I) Soldering Conditions
1. Solder Reflow: Follow the standard temperature profile, recommended soldering methods include infrared, vapor phase oven, and hot air oven. Avoid exceeding the specified temperature range to prevent product damage;
2. Rework (Hot Air Equipment): Temperature 350℃, soldering time 3~5 seconds;
3. Recommended Solder Pad Size: P=0.60mm, W=3.68mm, D=1.30mm, suitable for specific pad layout and steady current working conditions.
(II) Packaging Information
1. Packaging Quantity: 5,000 pcs per reel, weight 140±30g;
2. Reel & Tape Specifications: A=178±5mm, N=60±2mm, W1=9.0±1mm;
3. Peeling Strength of Seal Tape: 0.1–1.0N (10-100gf), peeling angle 165~180°, ensuring packaging tightness and easy use.
VI. Lot Acceptance Test Requirements
Each batch of products (maximum lot quantity not exceeding 500Kpcs) must pass the following strict tests before shipment:
1. Visual Inspection: Observe through a magnifying glass, no obvious stains, contamination, marking errors, or damage on the product;
2. Dimension Measurement: Measure with calibrated gages (such as calipers, micrometers, etc.), dimensions meet the specified standards;
3. Resistance Measurement: Use 4-wire resistance test at 25℃, the resistance value is within the specified range;
4. TCR Test: Measure the resistance values at 25℃ and 125℃ using the 4-wire method, calculate TCR by substituting into the formula, and the result meets the standard;
5. Insulation Resistance Test: Measure with a high ohm meter, the insulation resistance between the protective coating and the resistive element is not less than 100MΩ.
VII. Conclusion
With precise resistance control, excellent temperature stability, reliable mechanical and environmental adaptability, and a strict quality control system, the MHTC1206 Series Current Sensing Resistors have become an ideal choice for current detection in electronic devices. Whether in industrial control, automotive electronics, or consumer electronic products, this series can contribute to accurate monitoring and efficient operation of devices with stable performance. We always adhere to the quality commitment, strictly follow product specifications, and provide customers with high-quality and reliable electronic component solutions. In the future, we will continue to optimize product performance to meet the needs of more application scenarios and work hand in hand with customers to create a better electronic application experience.
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