Vishay Intertechnology Launches Space-Grade 150 W Planar Transformers Optimized for 28 V Input Forward Converters

Rhea-AI Summary

Vishay Intertechnology (NYSE: VSH) launched the SGTPL-28 series: space-grade, low-profile 150 W planar transformers optimized for 28 V input forward converters for avionics, military, and space applications on Oct 29, 2025.

The devices are qualified to MIL-PRF-27 level T, INST-EEE-002, and MIL-STD-981; operate to +130 °C; support 18–36 V input; offer 1250 VDC dielectric withstand and 0.5 µH leakage inductance; and provide up to 40% greater winding fill for smaller package size and higher power density.

SGTPL-28 parts have multiple screened options (P, L, INST-EEE-002 level 2/3, MIL-STD-981 B and S) and listed lead times from 8 to 26 weeks depending on screening; samples and production quantities are available now.

Positive

• Qualified to MIL-PRF-27 level T and MIL-STD-981
• Operates to +130 °C for high-temperature reliability
• Supports 18–36 V input with 1250 VDC dielectric withstand
• Provides up to 40% greater winding fill for smaller package and higher density
• Multiple screening options with samples available and lead times of 8–26 weeks

Negative

• Longest screening lead time of 26 weeks for MIL-STD-981 Table VI and VII class S
• No financial metrics or pricing disclosed to assess cost impact for buyers

Insights

Power electronics specialist

Vishay's 150 W SGTPL-28 planar transformers enable denser, cost‑efficient 28 V forward converter designs for AMS applications.

These parts offer a clear technical fit: optimization for 28 V forward converters, multiple center‑tapped secondaries for common 12 V and 5 V rails, a dielectric withstand rating of 1250 VDC, leakage inductance of 0.5 µH, and operation to +130 °C. The claimed 40 greater winding fill versus traditional planar parts implies smaller PCB area and higher power density for the same thermal and magnetic budget. Availability of samples and production quantities today shortens development cycles.

Dependencies and risks include screening level choice and lead time: P, L, B, and S screenings carry lead times from eight to 26 weeks, which affects qualification schedules. The performance edge relies on the vendor’s winding and molding quality; customers must validate losses, thermal rise, and EMI in their specific converter topologies. Watch screening deliveries over the next 26 weeks and initial field test data for thermal and EMI behavior.

Aerospace reliability engineer

Qualified to MIL‑PRF‑27 and MIL‑STD‑981, these transformers target avionics and space programs needing rugged, screened magnetics.

The product carries multiple formal screenings including MIL‑PRF‑27 level T, INST‑EEE‑002 levels, and MIL‑STD‑981 Table VI/VII options, which map to different mission assurance requirements. The package’s over‑molded windings, high temperature rating to +130 °C, and stated resistance to thermal shock, shock and vibration address common spacecraft and avionics reliability demands. The stated input range of 18 V–36 V matches typical 28 V bus tolerances.

Critical items to monitor are the specific screening reports and test data for each screening level and any customization NRE terms; the release states customization typically incurs no NRE and that strategic inventory management yields short lead times. Expect to review delivered test certificates and perform program‑level qualification tests within the next 12–26 weeks depending on chosen screening level.

Qualified to MIL-PRF-27 and MIL-STD-981, Robust Devices Offer Lower Cost, Smaller Size, and Higher Density Than Traditional Planar Transformers

MALVERN, Pa., Oct. 29, 2025 (GLOBE NEWSWIRE) -- Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new series of 150 W low profile, space-grade planar transformers with multiple output secondaries — the industry’s first such devices optimized for 28 V input forward converters in avionics, military, and space (AMS) applications. Offering a lower cost, smaller size, and higher density than traditional planar transformers, the Vishay Custom Magnetics SGTPL-28 series components meet the requirements of MIL-PRF-27 level T, INST-EEE-002, and MIL-STD-981.

In addition to 28 V forward converters, the devices released today will be used in high reliability switch mode power supplies and active clamp or dual switch forward converters. In these applications, multiple secondary windings with a center tap can power up to two 12 V channels or four 5 V channels. Designed for the harshest of environments, the transformers combine their MIL-PRF-27 and MIL-STD-981 qualifications with a rugged package featuring over-molded windings and high temperature operation to +130 °C. SGTPL-28 series devices withstand numerous thermal shock cycles and high levels of mechanical shock and vibration.

The transformers provide up to 40 % greater winding fill than traditional planar devices, resulting in a smaller package size to save PCB space and improve efficiency and power density. Their unique winding technology and internal construction enable easy customization to meet design-specific requirements, while the devices’ materials and production techniques allow for lower costs. In addition, strategic inventory management results in short lead times, typically without non-recurring engineering (NRE) charges for customization.

SGTPL-28 series transformers are available with six screening options: P level screening for design validation testing; L level screening for low Earth orbit (LEO) applications; INST-EEE-002 level 2 and level 3; MIL-STD-981 Table VI class B; and MIL-STD-981 Table VI and VII class S.

The devices offer an input voltage range from 18 V to 36 V, a dielectric withstand voltage of 1250 VDC, and leakage inductance of 0.5 µH.

Samples and production quantities of the SGTPL-28 series are available now, with lead times of eight weeks for P level screening; 12 weeks for L level screening; 16 weeks for B level screening; and 26 weeks for S level screening.

Vishay manufactures one of the world’s largest portfolios of discrete semiconductors and passive electronic components that are essential to innovative designs in the automotive, industrial, computing, consumer, telecommunications, military, aerospace, and medical markets. Serving customers worldwide, Vishay is The DNA of tech.^® Vishay Intertechnology, Inc. is a Fortune 1000 Company listed on the NYSE (VSH). More on Vishay at www.Vishay.com.

The DNA of tech^® is a registered trademark of Vishay Intertechnology, Inc.

Vishay on Facebook: http://www.facebook.com/VishayIntertechnology
Vishay Twitter feed: http://twitter.com/vishayindust

Links to product datasheets:
http://www.vishay.com/ppg?34647  (SGTPL-28)

Link to product photo:
https://www.flickr.com/photos/vishay/albums/72177720329948775

For more information please contact:
Vishay Intertechnology
Peter Henrici, +1 408 567-8400
peter.henrici@vishay.com
or
Redpines
Bob Decker, +1 415 409-0233
bob.decker@redpinesgroup.com

FAQ

What are the power and input specs of Vishay SGTPL-28 transformers (VSH)?

SGTPL-28 are 150 W planar transformers optimized for 28 V forward converters with an input range of 18–36 V.

Which military and space qualifications do the SGTPL-28 (VSH) meet?

They are qualified to MIL-PRF-27 level T, INST-EEE-002, and MIL-STD-981 with multiple screening options.

What operating temperature and electrical ratings do SGTPL-28 transformers (VSH) support?

Rated for operation to +130 °C, dielectric withstand 1250 VDC, and leakage inductance of 0.5 µH.

How do SGTPL-28 transformers (VSH) improve board space and power density?

Their winding technology delivers up to 40% greater winding fill, enabling a smaller package and higher power density.

What are lead times for Vishay SGTPL-28 series (VSH) depending on screening?

Lead times range from 8 weeks for P level screening to 26 weeks for MIL-STD-981 class S screening.

Are samples and production quantities of SGTPL-28 (VSH) available now?

Yes, samples and production quantities are available now per the announcement.