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HomeProductsInductors, Coils, ChokesFixed InductorsER1641-821JP
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ER1641-821JP - API Delevan Inc.

Manufacturer Part Number
ER1641-821JP
Manufacturer
API Delevan
Allelco Part Number
98D-ER1641-821JP
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
31,202 pcs available, New & Original
Parts Description
FIXED IND 820NH 370MA 590MOHM TH
Package
Axial
Data sheet
-
RoHs Status
 
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Our certification
In stock: 31202
  • Unit Price: $7.064
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $7.064 $7.06
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ER1641-821JP Tech Specifications
API Delevan Inc. - ER1641-821JP technical specifications, attributes, parameters and parts with similar specifications to API Delevan Inc. - ER1641-821JP

Product Attribute Attribute Value
Manufacturer API Delevan
Type Molded
Tolerance ±5%
Supplier Device Package -
Size / Dimension 0.162' Dia x 0.410' L (4.11mm x 10.41mm)
Shielding Shielded
Series ER1641
Ratings -
Q @ Freq 40 @ 25MHz
Package / Case Axial
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -55°C ~ 105°C
Mounting Type Through Hole
Material - Core Phenolic
Inductance Frequency - Test 25 MHz
Inductance 820 nH
Height - Seated (Max) -
Frequency - Self Resonant 180MHz
DC Resistance (DCR) 590mOhm Max
Current Rating (Amps) 370 mA
Current - Saturation (Isat) -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) Not Applicable
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.50.8000

Frequently Asked Questions(FAQ)

What is the practical frequency range where the ER1641-821JP maintains stable inductance performance?
The ER1641-821JP is specified with a self-resonant frequency (SRF) of 180 MHz, meaning its inductive behavior remains predictable below this threshold. At the test frequency of 25 MHz, the component exhibits a Q factor of 40, indicating moderate loss. Below 25 MHz, the ER1641-821JP operates in its primary inductive region where the 820 nH nominal value is reliable. Above 25 MHz but below 180 MHz, capacitive effects begin to emerge, gradually reducing effective inductance. Design applications requiring the ER1641-821JP should stay well below 180 MHz to avoid parallel resonance effects that would degrade filtering or impedance matching performance.
How does the 590mOhm DC resistance of the ER1641-821JP affect circuit efficiency in high-frequency switching applications?
The ER1641-821JP's 590 mOhm maximum DCR represents resistive loss that converts current into heat. At the maximum rated current of 370 mA, this translates to approximately 80.7 milliwatts of I²R dissipation. In switching power supply applications where the ER1641-821JP might filter output ripple or serve as a boost inductor, this resistance affects both efficiency and thermal performance. For circuits operating continuously near 370 mA, thermal considerations become significant; the component must be mounted with adequate board clearance. In lower-current applications (e.g., 100–200 mA), DCR-related losses remain minimal, making the ER1641-821JP suitable for logic-level or signal-path filtering without thermal concerns.
What thermal design considerations apply when using the ER1641-821JP in temperature-cycling environments?
The ER1641-821JP is rated for continuous operation from −55°C to 105°C, a 160°C span typical of industrial and automotive-grade components. The phenolic core material exhibits inductance variation with temperature; while not explicitly specified in the datasheet, phenolic inductors typically shift ±5–10% across this range. In designs where the ER1641-821JP serves precision-dependent functions (e.g., resonant frequency in a tuned filter), temperature-induced shifts may require compensation or loose tolerance acceptance. The component's axial through-hole form factor allows direct mounting to PCB traces, but thermal cycling stress concentrates at solder joints. For reliability in vibration-prone environments, the ER1641-821JP benefits from mechanical support (e.g., conformal coating or mechanical strain relief) to minimize thermal fatigue cracking at lead interfaces.
How does the ER1641-821JP compare to ferrite-core inductors of similar inductance and current rating?
The ER1641-821JP uses a phenolic core material, which differs fundamentally from ferrite inductors. Ferrite-core designs typically offer lower DCR (300–400 mOhm for comparable ratings) and higher Q factors (60–80 at 25 MHz), resulting in better efficiency and lower thermal dissipation. However, ferrite cores are more susceptible to saturation at elevated currents and experience inductance variation with DC bias. The ER1641-821JP's phenolic construction exhibits more stable inductance across bias conditions and temperature, making it preferable for precision frequency-dependent circuits. Ferrite inductors generally offer smaller form factors and higher integration density, while the ER1641-821JP's 4.11 mm diameter and 10.41 mm length reflect a more generous, robust design. Cost and lead-time availability also differ; phenolic inductors like the ER1641-821JP are often more readily stocked in standard distribution channels.
Can the ER1641-821JP be used in RF matching networks, and what performance trade-offs exist?
The ER1641-821JP can function in RF matching and filtering circuits up to roughly 100–150 MHz, given its 180 MHz SRF and Q of 40 at 25 MHz. However, the relatively modest Q factor means the ER1641-821JP introduces more loss than specialized RF inductors (which typically achieve Q > 100 at GHz frequencies). In impedance-matching networks, this loss reduces overall circuit efficiency and may require larger component values elsewhere to compensate. The ER1641-821JP is well-suited for low-frequency RF applications (e.g., AM/FM broadcast-band coupling or tuning) and baseband filtering, but poor for narrowband matching at microwave frequencies. For frequencies approaching 180 MHz, parasitic capacitance in the ER1641-821JP becomes significant, shifting the effective inductance downward and requiring empirical tuning rather than datasheet-based design.
What is the saturation current behavior of the ER1641-821JP, and why is saturation not specified?
The ER1641-821JP's datasheet does not specify an Isat (saturation current) value because phenolic-core inductors do not exhibit the abrupt saturation characteristic of ferrite or iron-powder cores. The phenolic core is nonmagnetic; inductance remains relatively constant regardless of DC bias current up to the maximum rated 370 mA. Instead of saturation, the ER1641-821JP will experience resistive heating and eventual failure of solder joints or the component itself if current significantly exceeds 370 mA. This absence of saturation makes the ER1641-821JP more predictable in designs where load current varies widely, but designers must respect the 370 mA thermal and mechanical limit as a hard ceiling rather than a soft saturation threshold.
How should the ER1641-821JP be laid out on a PCB to minimize EMI coupling to adjacent traces?
The ER1641-821JP is shielded, meaning its magnetic field is largely confined within the component's structure, reducing radiated emissions and susceptibility to external fields. However, the shield is not perfect; low-frequency magnetic fields (especially below 10 MHz) may couple to nearby sensitive circuits. PCB layout best practices for the ER1641-821JP include: (1) maintaining at least 0.5 inches of clearance between the ER1641-821JP and high-impedance analog traces; (2) routing return paths directly beneath the inductor's axial length to maintain symmetry; (3) avoiding loop areas that encircle the component's magnetic field; (4) using ground planes under and adjacent to the ER1641-821JP to provide a low-impedance return. The component's through-hole axial leads are inherently lower-inductance than surface-mount alternatives, reducing self-resonance and improving bandwidth.
What moisture and environmental protection does the ER1641-821JP require in humid or corrosive settings?
The ER1641-821JP is marked RoHS non-compliant and carries an MSL rating of 'Not Applicable,' indicating the component does not absorb significant moisture and does not require baking before soldering. However, the through-hole axial leads are bare copper or plated with tin or nickel, which corrode in salt-fog or high-humidity industrial environments. For long-term reliability in harsh conditions, the ER1641-821JP should be protected with conformal coating (acrylic or silicone) applied after assembly. The phenolic core itself resists moisture and thermal degradation better than many polymer-core inductors, but the lead-solder interface remains the failure mode of concern. The ER1641-821JP is REACH unaffected, making it suitable for EU and global applications without RoHS exemption complexity.
How does the ±5% inductance tolerance of the ER1641-821JP impact filter cutoff frequency calculations?
The ER1641-821JP's ±5% tolerance means actual inductance ranges from 779 nH to 861 nH across the production batch. In RC or LC filter designs, cutoff frequency is inversely proportional to inductance; a −5% inductance shift increases cutoff by approximately 5.3%, while a +5% shift decreases cutoff by 5.0%. For a first-order RL filter with the ER1641-821JP and a 1 kΩ resistor, this 10.3% total frequency spread may be acceptable for general filtering but unacceptable for precision frequency-dependent applications like crystal oscillator filters or narrowband resonators. If tighter control is required, hand-selection from a larger sample or use of a tuning element (trimmer capacitor in parallel) is necessary. The ER1641-821JP's ±5% spec is typical for molded inductors and reflects manufacturing process limitations in phenolic-core production.
What is the mechanical robustness of the ER1641-821JP under vibration and shock in automotive or industrial environments?
The ER1641-821JP's axial through-hole package provides good mechanical anchoring compared to surface-mount alternatives, as solder joints distribute stress over two points and the leads are mechanically fixed within the PCB. However, the 0.162-inch (4.11 mm) lead diameter is relatively thin; vibration-induced stress concentrates at the solder fillet interface. In high-vibration applications (e.g., engine bay or industrial machinery), the ER1641-821JP benefits from mechanical support such as potting, conformal coating, or a mounting bracket to prevent lead fatigue. The phenolic core is brittle and can crack if the component is bent sharply during assembly or rework. Thermal cycling (−55°C to 105°C) in combination with vibration accelerates solder-joint fatigue, particularly if the component is located near a heat source. For automotive-grade reliability, the ER1641-821JP should be treated as a Class 2 component requiring selective rework procedures and fatigue-life analysis in high-stress placements.
Can the ER1641-821JP be paralleled with other inductors to increase current capacity, and what precautions are needed?
Paralleling the ER1641-821JP with identical or similar inductors reduces overall inductance by the parallel rule (two equal inductors yield L_total = L / 2). This is advantageous for increasing current capacity: two ER1641-821JP units in parallel support approximately 740 mA with an effective inductance of 410 nH. However, practical concerns arise: (1) DCR is also halved (295 mOhm), improving efficiency but requiring careful layout to ensure current divides equally; (2) any mismatch in inductance causes unequal current division and unequal heating; (3) resonant frequency and Q factor are affected by mutual coupling between the two components—if they are placed too close, coupling can increase or decrease the effective inductance unpredictably. Best practice is to space the ER1641-821JP units at least 0.5 inches apart and cross-couple their return paths symmetrically. Paralleling is practical but less elegant than selecting a higher-current rated component, if available.
What is the cost-performance positioning of the ER1641-821JP relative to comparable off-the-shelf inductors?
The ER1641-821JP occupies a price-performance sweet spot for general-purpose through-hole filtering and coupling applications. Molded phenolic inductors like the ER1641-821JP typically cost 40–60% less than ferrite inductors with equivalent specifications, reflecting simpler manufacturing and lower material costs. However, the ER1641-821JP's modest Q factor (40 at 25 MHz) and higher DCR (590 mOhm) incur efficiency penalties in power conversion designs; ferrite alternatives may cost more upfront but reduce system-level losses and thermal management complexity. The ER1641-821JP is widely available in standard tape-and-reel packaging, supporting volume production without supply-chain delays. For one-off prototyping or educational applications, the ER1641-821JP offers accessibility and ease of rework compared to surface-mount inductors. Long-term availability of the ER1641-821JP series through API Delevan is stable, reducing obsolescence risk in legacy or long-lifecycle products.

Parts with Similar Specifications

The three parts on the right have similar specifications to API Delevan Inc. ER1641-821JP

Product Attribute ER1641-821JR ER1641-822JP ER1641-821JM ER1641-821JS
Part Number ER1641-821JR ER1641-822JP ER1641-821JM ER1641-821JS
Manufacturer API Delevan Inc. API Delevan Inc. API Delevan Inc. API Delevan Inc.
Inductance Frequency - Test - - - -
Current Rating (Amps) - - - -
Size / Dimension - - - -
Q @ Freq - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Height - Seated (Max) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Frequency - Self Resonant - - - -
Material - Core - - - -
Current - Saturation (Isat) - - - -
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
DC Resistance (DCR) - - - -
Shielding - - - -
Ratings - - - -
Inductance - - - -
Tolerance - - - -

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2.00kg-3.00kg USD$50.00 - USD$100.00
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API Delevan Inc.

ER1641-821JP

API Delevan Inc.
98D-ER1641-821JP

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

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