Environmental

VMI diodes have been ESDS classified in accordance with MIL‐PRF‐19500 and tested in accordance with MIL‐STD‐750, Method 1020 to Class 3A, Electrostatic Voltage 4000–7,999 Volts.

Updated: February 8, 2012

There are at least four of the chemicals in the Proposition 65 list that are used at VMI. These chemicals are processed into a finished article, or otherwise used as a processing aid, cleaner, etc.

Chemicals that are otherwise used would not be present in the finished VMI article product.

There is no chemical exposure potential to users of the article provided by VMI.

Updated: May 5, 2023

Glass Body Diodes – Moisture Sensitivity Levels – for discrete diodes.

We believe our products are not sensitive to moisture, and do not classify them as such. Several devices are currently undergoing MSL testing, and we have implemented MSL practices on a limited basis. If you have MSL requirements and require the use of desiccants, moisture gauges, or labels, please contact us.

Hybrid Multipliers (VM1447, VM1448, VM1548, VM1566, PVM series) – These devices are MSL 3.

The information contained herein is relevant to several VMI product lines including: SMF, SXF. 

Several FAQ specific to the above product lines are listed below:

What is the base metal used in the lead-frame or termination? SMF and SXF products use 99.99% silver terminations with no finish.

Are the parts annealed after plating? The parts are not annealed or post baked within 24 hours after plating.

What is the Moisture Sensitivity Level (MSL)?

• Our hermetically sealed diodes are not sensitive to moisture and  are not classified as such. VMI overmolded diodes, such as the SXF and SMF type, have been tested to MSL 1, and passed.
• Occasionally our customers request MSL type packaging due to solderability issues of the leads, we do provide the desiccant, and as required the  moisture gauge with  moisture sensitive packaging  if applicable to the product.

QPL Diodes: JAN/TX/V military grade diodes, QPL diodes, including JAN/TX/V, are solder-dipped per the governing Source Control Document.

Updated February 16, 2023

Environmental Information

• Conflict Minerals – Request VMI’s Conflict Mineral Declaration file by contacting the factory.
• VMI’s RoHS Compliance Policy
  • VMI continues to work towards total compliance to the RoHS initiatives regarding the use restricted materials in our products.
  • The information provided here has been determined to be accurate to the best of our ability.
  • We believe we are in total compliance where stated.
  • If you do not see the product you are interested in, please contact us.
    
  • Check back often, more product information will be added.
• RoHS Compliance
  • For information on RoHS compliance visit RoHS Compliance for VMI standard products.
    

Process Recommendations and Information

• Soldering Recommendations – For axial-leaded devices, SMD, formed-lead, glass-body, epoxy, MD90, SRP18U, SMF and SXF family diodes, the recommendations are as follows:
  • Peak Process Body Temp: 350C
    
  • Max. Time @ Peak Temp: 3 sec.
    
  • Number of Reflow Cycles: 2
• Diode Storage Recommendations and Practices
  • VMI diodes use 99.99% silver leads, which will oxidize in air, rendering the diode leads difficult to solder. We recommend that diodes be stored in a sealed and air-tight anti-static bag with an anti-tarnish strip. Preferably the diodes should be stored in an inert atmosphere, such as a nitrogen box.
  • VMI ships diodes in sealed bags that have been purged with nitrogen. Once the bag is unsealed, the solderabiltiy is good for 168 hours typically. However, this may not be the case in high humidity or high temperature environments.

Solder Dip Policy
Many diodes and assemblies are solder dipped, either by default, or customer request. Below is a brief outline regarding VMI’s solder-dipping policy. Please contact us if you have any questions.

Axial-leaded devices – All leads in axial-leaded diodes are 99.99% silver.

This includes all diodes with part numbers starting with 1N, M, X, or Z. Sample part numbers include “1N6513”, “M100UFG”, “X50SG”, and “ZR100SG”. This does not apply to JAN/TX/V military QPL diodes.

• Default condition – No solder dip, unless requested.
• When requested, the default alloy is Sn96* unless otherwise specified.
• Devices shipped to Asian countries are automatically solder-dipped in Sn96. No request is needed.
• Exceptions to this include diodes ending in “L” or “LL”. The default finish is a tin/lead solder dip. Sample part numbers include “X20FF5L”, “1N6517LL”, and “Z50FF5LL”.