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Variable Pitch Capacitors

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Another custom approach is our variable pitch design. No longer are you limited to a vendor’s standard catalogue offering or only square or rectangular custom designs. We let you be-come your own capacitor designer by not only telling us the desired capacitance and voltage, but also the size, shape, and location of leads! This process helps insure that the resulting capacitor satisfies every aspect of your design requirements.

Variable pitch Capacitors

 

Qualification of Sn-Pb Termination on Ceramic MLCC Products

Qualification of Sn-Pb Termination

Johanson Dielectrics’ tin-lead plated products are offered for high reliability, aerospace, and other applications where tin whiskering is a concern. The plating is tin-lead over nickel barrier with 5% minimum lead content. The lead content of the plating in every manufacturing lot is verified using the XRF method, and this data is available upon request. The tin-lead plated products fulfill MIL-PRF-55681 finish requirements.

TIN WHISKER QUALIFICATION OF MLCC PASSIVE COMPONENT FAMILY PRODUCED BY JOHANSON

RESULTS:
Three (3) separate representative lots of Johanson Multi-Layer Ceramic Capacitors (MLCC) all plated on the same Johanson plating line, completed and meet all iNEMI acceptance requirements of:

  • JEDEC JESD201 Environmental Acceptance Requirements for Tin Whisker Susceptibility of Tin and Tin Alloy Surface Finishes for Class 2 products
  • JEDEC JESD22-A121A Test Method for Measuring Whisker Growth on Tin & Tin Alloy Surface Finishes

All samples exhibited no (zero) tin whisker growth during both specified storage tests, and ≤ 30 micron tin whisker growth during temperature cycling, therefore meeting the 45 micron specified maximum.

DETAILS:
Johanson Dielectrics MLCCs tested:

JTI Part Number Part Description EIA Size Manufacturing Order Number Lot Number Test ID
500R11W103MV4 50VDC, 10nF, MLCC 0504 145110-03 234-6001 C1
302R18W102KV4 3KV, 1nF, MLCC 1206 441062-00 234-6071 C2
102S43W223KV4 1KV, 22nF, MLCC 1812 412825-00 131-6064 C4

Nine (9) samples of each part number were tested in each of the three Tin Whisker tests conducted in parallel and described in Figure 1. All three tests were run as specified for class 2 products, i.e., 1500 temperature cycles, and 4000 hours for each of the storage tests.

Whiskers Tests to perform according to the JEDEC Standards
Test definition Temperature cycling Room temperature/Humidity storage High temperature/Humidity storage
Condition -55 +0/-10°C to 85 +10/-0°C
or
-40 +0/-10°C to 85 + 10/-0°C
Soak: 10 mn / 3 cycles/hr
Readout: every 500 cycles

Minimum duration: 1000v cycles

Minimum duration: 1500iii cycles
for class 2 products		 30±2°C 60±3 %RHv



Readout: every 1000hr

Minimum duration : 3000 hrv

Minimum duration : 4000 hriii
for class 2 products		 60±5°C 87+3/-2 %RHv
or
55±3°C 85±3 %RHiii

Readout: every 1000hr

Minimum duration : 3000 hrv

Minimum duration : 4000 hriii
for class 2 products
Whisker control and sampling - Scanning Electron Microscope (SEM) with a magnification X300
- 3 sample locations for coupons and 3 visible sides for components
Sample
- 3 Lots per stress with 2 samples with 96 screening inspection and 18 Detailed inspection per read-out for Multi-leaded component
- 3 Lots per stress with 3 samples with 18 screening inspection and 18 Detailed inspection per read-out for passive and discrete components with 4 leads or fewer
Criteria Equivalent or better to reference part with Pb or if not:
< 40μm for Room temperature/Humidity storage and High temperature/humidity storage
< 45μm for Temperature cycling

Figure 1

Chip Filter / Feed-Thru Capacitors

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Our Feed-Thru Capacitors provide excellent EMI, I/O & Power Line filtering exhibiting much lower inductance than standard SMT capacitors which results in broader frequency response. These are Precious Metal Electrode (PME) products with higher current ratings than comparable Base Metal Electrode (BME) parts.
Chip Filter / Feed-Thru Capacitors

Features:

  • 1 Amp Current Rating
  • Low Inductance, High SRF
  • Surface Mount Non-polarized
  • Sn-Pb and Polyterm® Options

Applications:

  • DC Power Line EMI Filter
  • RF Immunity FIlter
  • RF Amplifier Gain Filter

Obsolete Products

EMI Chip Filter Feedthru MLCC
Chip Filter / Feed-Thru Capacitors

Obsolete - No longer available. Our Feed-Thru Capacitors provide excellent EMI, I/O & Power Line filtering exhibiting much lower inductance than standard SMT capacitors.
Low Inductance Chip Capacitors LICC
LICC

Obsolete - No longer available.
LICC capacitors are specially designed to exhibit lower inductance by altering the aspect ratio of the terminations.

 

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Precision and Power Resistors

  This specific product line is not for new designs.
Power Inductors image
Power Inductors

End of Life / Lifetime Buy.
LPC Series and LPM Series Power Inductors

 

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Legacy Part Number Breakdown

  Legacy how to order part number breakdown.