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HomeProductsResistorsChip Resistor - Surface MountHV733ATTE4754F
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HV733ATTE4754F - KOA Speer Electronics, Inc.

Manufacturer Part Number
HV733ATTE4754F
Manufacturer
KOA Speer Electronics, Inc.
Allelco Part Number
98D-HV733ATTE4754F
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
33,460 pcs available, New & Original
Parts Description
RES 4.75M OHM 1% 1W 2512
Package
2512
Data sheet
HV733ATTE4754F.pdf
RoHs Status
ROHS3 Compliant
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In stock: 33460
  • Unit Price: $0.272
  • Subtotal: $0.00

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Specifications

HV733ATTE4754F Tech Specifications
KOA Speer Electronics, Inc. - HV733ATTE4754F technical specifications, attributes, parameters and parts with similar specifications to KOA Speer Electronics, Inc. - HV733ATTE4754F

Product Attribute Attribute Value
Manufacturer KOA Speer Electronics, Inc.
Tolerance ±1%
Temperature Coefficient ±100ppm/°C
Supplier Device Package 2512
Size / Dimension 0.248" L x 0.122" W (6.30mm x 3.10mm)
Series HV73
Resistance 4.75 MOhms
Power (Watts) 1W
Package / Case 2512 (6432 Metric)
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -55°C ~ 155°C
Number of Terminations 2
Height - Seated (Max) 0.028" (0.70mm)
Features High Voltage, Moisture Resistant
Failure Rate -
Composition Thick Film
Base Product Number HV733A

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8533.21.0030

Frequently Asked Questions(FAQ)

What are the practical voltage limitations when using the HV733ATTE4754F in high-voltage circuit designs?
The HV733ATTE4754F is engineered within KOA Speer's HV73 series specifically for high-voltage applications. While the exact voltage rating depends on circuit topology and environmental conditions, the thick-film construction and high-voltage designation indicate suitability for applications exceeding standard resistor voltage classes. The 4.75 MOhms resistance value in the HV733ATTE4754F makes it particularly useful in voltage divider networks, feedback sensing circuits, and high-impedance paths where voltage stress concentration occurs. Design considerations should account for the ±100ppm/°C temperature coefficient, which affects voltage-dependent circuit behavior across the -55°C to 155°C operating range. In practice, engineers often derate high-voltage resistors by 20–30% from absolute maximum ratings when the HV733ATTE4754F is deployed in extended temperature environments or with transient overvoltage exposure.
How does the ±1% tolerance of the HV733ATTE4754F compare to standard film resistors for precision voltage divider applications?
The HV733ATTE4754F delivers ±1% tolerance, positioning it as a mid-range precision option within thick-film high-voltage resistor families. This tolerance band is tighter than standard carbon-film resistors (typically ±5–10%) but wider than thin-film resistors (±0.1–0.5%). For voltage dividers using the HV733ATTE4754F, the ±1% tolerance translates to approximately ±47.5 kOhms uncertainty in the 4.75 MOhms value, which becomes significant when ratiometric accuracy is required. Thick-film technology in the HV733ATTE4754F exhibits better long-term drift characteristics than carbon film under thermal cycling, making it suitable for circuits where voltage reference stability matters over product lifetime. However, if better than ±1% accuracy is required—such as in precision measurement frontends—thin-film alternatives should be evaluated despite potential voltage rating compromises.
Why is the HV733ATTE4754F specified in the 2512 package rather than smaller surface-mount sizes for high-voltage applications?
The 2512 (6432 metric) package of the HV733ATTE4754F provides physical spacing and material volume necessary for voltage withstand and thermal dissipation in high-voltage circuits. At 0.248" × 0.122" (6.30mm × 3.10mm), the HV733ATTE4754F offers substantially more surface area than smaller packages like 1206 or 0805, which reduces electric field concentration at component edges—a critical failure mechanism in high-voltage designs. The thicker dielectric layer inherent to the 2512 package supports higher voltage isolation between terminals. Thermal performance also benefits: the HV733ATTE4754F can sustain the full 1W power rating across the -55°C to 155°C temperature range without exceeding typical Tj limits, whereas smaller packages would require more aggressive derating. From a practical standpoint, the 0.028" (0.70mm) maximum seated height of the HV733ATTE4754F balances board real estate against clearance and creepage requirements demanded by high-voltage safety standards.
What makes the HV733ATTE4754F moisture-resistant, and how does MSL 1 rating affect assembly and storage?
The HV733ATTE4754F incorporates moisture-resistant thick-film technology that reduces water absorption into the ceramic substrate and resistive element. This is distinct from standard film resistors, where moisture ingress can degrade insulation resistance and increase leakage current—especially problematic in high-voltage paths. The MSL 1 (Unlimited) classification for the HV733ATTE4754F means there are no moisture sensitivity constraints on shelf life or reflow exposure; the component does not require baking before soldering, even after extended storage in humid environments. In practice, this simplifies supply chain logistics and reduces production overhead compared to MSL 3 or higher components. For circuits deployed in humid, corrosive, or demanding environmental conditions, the moisture-resistant specification of the HV733ATTE4754F reduces the risk of field failures caused by surface leakage paths or substrate degradation.
How does the ±100ppm/°C temperature coefficient of the HV733ATTE4754F affect circuit performance across industrial temperature ranges?
The HV733ATTE4754F exhibits a ±100ppm/°C temperature coefficient, meaning the 4.75 MOhms nominal resistance will drift by approximately ±475 kOhms across a 100°C temperature swing. Over the full -55°C to 155°C operating window, cumulative drift can reach roughly ±0.95% of the nominal value—a significant consideration in circuits where the HV733ATTE4754F sets impedance-dependent characteristics such as time constants, gain, or frequency response. In high-voltage sensing applications, where the HV733ATTE4754F forms part of a resistive divider network, mismatched temperature coefficients between paired resistors introduce ratiometric errors. Mitigation strategies include selecting complementary resistor pairs with similar temperature coefficients or employing active compensation in signal conditioning circuits. For applications where the HV733ATTE4754F operates predominantly at elevated temperatures (e.g., near power dissipation sources), thermal characterization during design validation helps predict long-term drift and ensures circuit margins remain acceptable.
What thermal management considerations apply when the HV733ATTE4754F dissipates its full 1W power rating in confined board areas?
The HV733ATTE4754F is rated for 1W continuous dissipation, but sustained 1W operation in a compact 2512 package generates localized thermal stress. Typical thick-film resistors exhibit a thermal time constant of several seconds, meaning transient power pulses do not immediately translate to steady-state junction temperature. However, the HV733ATTE4754F's junction temperature rise depends heavily on PCB copper area, layer stackup, and proximity to thermal sinks or heat sources. In practical designs, engineers estimate junction temperature using the thermal resistance (typically 200–300°C/W for a 2512 component in standard 1-ounce copper) multiplied by dissipated watts, then add ambient temperature. For the HV733ATTE4754F, 1W dissipation at room temperature can generate 50–100°C junction rise, pushing Tj toward the upper operating limit if ambient is elevated. Strategic placement of the HV733ATTE4754F away from other heat sources, use of thermal vias, and heavier copper planes reduce local temperature and improve voltage withstand capability.
When should the HV733ATTE4754F be preferred over carbon-composition or wirewound resistors in high-voltage divider chains?
The HV733ATTE4754F offers distinct advantages over carbon-composition and wirewound alternatives for high-voltage dividers. Carbon-composition resistors exhibit higher noise, greater frequency dependence, and poor frequency response above audio ranges—unsuitable for high-frequency feedback paths. Wirewound resistors introduce undesirable inductance, which creates resonance and overshoot in transient-sensitive circuits; the HV733ATTE4754F's thick-film construction exhibits minimal inductance, making it suitable for fast-rising pulse environments. The HV733ATTE4754F also provides superior humidity stability compared to carbon-composition types, which drift significantly under moisture exposure. For applications requiring moderate frequency response (up to a few MHz), stable impedance across temperature, and integration into mixed-signal systems, the HV733ATTE4754F delivers a practical balance. Wirewound resistors retain advantages only where extremely high power dissipation (>10W) or specialized frequency characteristics are required—conditions not typical for precision high-voltage sensing using the HV733ATTE4754F.
What is the relationship between the HV733ATTE4754F's 4.75 MOhms value and practical leakage current limitations in high-voltage circuits?
The 4.75 MOhms resistance of the HV733ATTE4754F directly influences leakage current and power dissipation in high-voltage nodes. At 1000V, for example, a HV733ATTE4754F divider resistor would draw approximately 210 µA—a non-negligible current in battery-powered or low-power applications. This leakage defines the practical impedance ceiling in high-voltage divider networks; exceeding 4.75 MOhms (or using multiple HV733ATTE4754F units in series) creates excessive current draw, while lower resistance increases power dissipation. In charge-pump circuits or isolated bias supplies, the HV733ATTE4754F's resistance value directly impacts regulation quality and output impedance. Engineers must also consider the insulation resistance (typically >10¹⁰ Ohms) parallel to the nominal 4.75 MOhms, which ensures leakage through the substrate or termination remains negligible under normal conditions but degrades if moisture or contamination affects the component.
How does the HV733ATTE4754F's RoHS3 compliance and REACH status simplify supply chain qualification for medical or automotive applications?
The HV733ATTE4754F is RoHS3 compliant and REACH unaffected, meaning it is free from restricted hazardous substances and does not require chemical registration with EU authorities. For medical device manufacturers following IEC 60601 standards or automotive suppliers under AEC-Q200 qualifications, the HV733ATTE4754F eliminates material documentation burden and supply chain risk related to substance restrictions. This compliance status enables the HV733ATTE4754F to be used in products exported globally without material reformulation or secondary sourcing. In practice, this reduces engineering change notices and simplifies long-term supply agreements. ECCN classification as EAR99 also simplifies export logistics for the HV733ATTE4754F compared to components subject to advanced technical export controls.
What design margin should be incorporated when selecting the HV733ATTE4754F for applications at the upper operating temperature limit?
When the HV733ATTE4754F operates near its 155°C upper temperature limit, multiple derating factors compound. First, the ±100ppm/°C temperature coefficient shifts the 4.75 MOhms nominal value by approximately ±0.475% per 10°C, introducing circuit parameter drift. Second, insulation resistance typically declines with temperature, increasing leakage current and reducing effective impedance. Third, voltage withstand capability of the thick-film dielectric decreases at elevated temperature—typically 10–20% reduction from room-temperature ratings. For safety-critical or precision applications, many engineers derate the HV733ATTE4754F to operate no higher than 125°C, accepting the loss of 30°C margin to account for component-to-component variation, localized hot spots, and long-term aging effects. This conservative approach ensures the HV733ATTE4754F maintains predictable behavior over the product lifecycle.
Can the HV733ATTE4754F be used in parallel to achieve lower impedance without compromising the high-voltage rating?
Parallel connection of the HV733ATTE4754F resistors reduces total impedance while preserving individual voltage withstand capability. However, practical benefits are limited by resistor matching and tolerance effects. Two HV733ATTE4754F units in parallel yield approximately 2.375 MOhms nominal, with tolerance stackup creating ±1% on the combined value. If better tolerance matching is required, hand-selection or use of matching networks is necessary. From a high-voltage standpoint, each HV733ATTE4754F terminal remains at the same voltage potential in a true parallel configuration, so voltage withstand is not compromised. However, unequal current distribution occurs if component tolerances vary; the unit with lower actual resistance carries slightly higher current and dissipates more power. For precision divider circuits, series connection (to increase impedance and reduce leakage) is more common than parallel connection, making series connection the preferred topology when the HV733ATTE4754F's 4.75 MOhms is insufficient.
How should the HV733ATTE4754F be specified in a bill of materials to ensure consistent sourcing and performance across production batches?
Proper specification of the HV733ATTE4754F in manufacturing documentation requires the full manufacturer part number (HV733ATTE4754F), manufacturer name (KOA Speer Electronics, Inc.), and key performance criteria: 4.75 MOhm resistance, ±1% tolerance, 1W power rating, and 2512 package. Omitting details such as the temperature coefficient (±100ppm/°C) or moisture-resistant designation can lead to substitution with non-equivalent parts. For high-volume production, specifying the HV733ATTE4754F with an approved manufacturer list and agreed-upon tape-and-reel packaging ensures procurement consistency and reduces incoming inspection burden. If secondary sources are acceptable, equivalent alternatives should be explicitly qualified and listed; however, high-voltage resistor families often exhibit subtle differences in voltage rating, temperature behavior, and frequency response, so cross-grade substitution of the HV733ATTE4754F should not be assumed without testing.
What failure modes are most likely for the HV733ATTE4754F, and how can circuit design mitigate them?
The HV733ATTE4754F, as a passive thick-film component, does not typically fail catastrophically under normal operation; however, two failure modes warrant attention. First, open-circuit failure occurs if the resistive element develops micro-cracks due to thermal cycling or mechanical stress—particularly at the termination interfaces. This failure mode is rare with the HV733ATTE4754F's 2512 package and RoHS3-compliant construction but becomes more likely if the component experiences repeated thermal shock (>50°C/s ramp rates). Second, resistance drift accelerates under combined thermal and electrical stress; the HV733ATTE4754F's ±100ppm/°C characteristic can compound if sustained high temperatures coincide with elevated voltage stress, leading to 5–10% resistance shift over years rather than the expected <1% annual drift. Mitigation strategies include operating the HV733ATTE4754F at conservative voltage and temperature margins, avoiding rapid thermal cycling, and incorporating redundancy or automatic calibration in circuits where resistance drift directly affects performance.

Parts with Similar Specifications

The three parts on the right have similar specifications to KOA Speer Electronics, Inc. HV733ATTE4754F

Product Attribute HV733ATTE4874F HV733ATTE4753F HV733ATTE4704F HV733ATTE4752F
Part Number HV733ATTE4874F HV733ATTE4753F HV733ATTE4704F HV733ATTE4752F
Manufacturer KOA Speer Electronics, Inc. KOA Speer Electronics, Inc. KOA Speer Electronics, Inc. KOA Speer Electronics, Inc.
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Tolerance - - - -
Composition - - - -
Temperature Coefficient - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Features - - - Simultaneous Sampling
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Height - Seated (Max) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Failure Rate - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Resistance - - - -
Size / Dimension - - - -
Number of Terminations - - - -
Power (Watts) - - - -

HV733ATTE4754F Datasheet PDF

Download HV733ATTE4754F pdf datasheets and KOA Speer Electronics, Inc. documentation for HV733ATTE4754F - KOA Speer Electronics, Inc..

Datasheets
HV73 Type Datasheet.pdf

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HV733ATTE4754F Image

HV733ATTE4754F

KOA Speer Electronics, Inc.
98D-HV733ATTE4754F

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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