Samsung Galaxy S25 Ultra Silicone Case Black USB-C & S Pen Slot

This protective cover features a dual-layer design with a rigid internal frame and a soft-touch silicone exterior for secure handling. Precision engineering provides easy access to the stylus and USB-C port while maintaining a slim 30g profile. The lightweight construction supports wireless charging and is tailored specifically for the SM-S938 handset.

The official Samsung Galaxy S25 Ultra Silicone Case Black  — EF-PS938CBEGWW, Samsung’s official slim silicone case for the Galaxy S25 Ultra. PC frame with silicone outer layer, precision cutouts for S Pen slot and all hardware, wireless charging compatible, and lightweight at approximately 30g. Exclusively compatible with Galaxy S25 Ultra (SM-S938). Black.

• ✓ Official Samsung EF-PS938CBEGWW — PC + silicone construction, precise S25 Ultra fit
• ✓ S Pen slot and ejector cutout — insert and eject S Pen normally with case on
• ✓ Wireless charging compatible · slim profile · ~30g · matte black finish
• ✓ Compatible exclusively with Galaxy S25 Ultra (SM-S938) · Black

The Samsung Galaxy S25 Ultra Silicone Case in Black (EF-PS938CBEGWW) is Samsung’s official slim silicone case for the Galaxy S25 Ultra — designed in-house to guarantee precise cutout alignment with every port, speaker, camera module and, critically, the S Pen slot and ejector on the S25 Ultra. The case uses a dual-layer construction: a rigid PC inner frame that maintains the case’s shape and distributes impact loads around the phone’s body, with a silicone outer layer that provides the soft-touch grip feel and absorbs minor knocks and scuffs. The matte black silicone surface resists fingerprints and provides a secure grip in hand, and its flexibility allows the case to be fitted and removed without the cracking risk of a rigid plastic shell. The precise engineering of the S Pen cutout is one of the main reasons to choose the official Samsung case over third-party alternatives for the S25 Ultra specifically — the S Pen ejector mechanism requires a specific clearance geometry that generic cases do not always maintain accurately, which can prevent full S Pen ejection or cause the S Pen to catch on the case edge. Wireless charging is not blocked by the case back. Compatible exclusively with Galaxy S25 Ultra (SM-S938).

PC Frame + Silicone · Dual Layer

Construction and Protection

The EF-PS938 uses a composite construction that is standard across Samsung’s official silicone case range — a polycarbonate (PC) inner shell bonded to a thermoplastic silicone outer layer. The PC inner frame provides the structural rigidity that distributes drop impact forces around the phone’s perimeter rather than concentrating them at the point of impact, which is the primary mechanism of drop protection in a slim case. Without the rigid inner frame, a pure silicone case would deform and allow the impact to reach the phone body directly. The silicone outer layer provides the tactile quality and grip that makes the case pleasant to hold — silicone’s rubber-like coefficient of friction is substantially higher than bare glass or plastic, reducing the likelihood of the phone sliding off surfaces. The matte finish on the silicone surface reduces the oil smudging and fingerprinting that glossy finishes show prominently. At approximately 12mm total case thickness and 30g, the EF-PS938 adds minimal bulk to the S25 Ultra’s profile — the combination of official Samsung fit and low-profile construction maintains the ergonomic feel of the device in hand rather than making it feel significantly larger or heavier.

S Pen Cutout · Official Samsung Fit

Why Official Fit Matters for S25 Ultra

The Galaxy S25 Ultra’s S Pen silo is the most dimensionally critical element of the case fit — it requires a precise cutout for the S Pen slot opening, a clearance channel along the S Pen housing depth, and an unobstructed access point for the spring-loaded ejector mechanism. Samsung designs the EF-PS938 using the exact S25 Ultra engineering drawings, with the case cutouts confirmed against the production device before release. Third-party cases manufactured to approximate S25 Ultra dimensions frequently have S Pen cutout tolerances that are either too tight — causing the S Pen to bind when inserting or ejecting — or too loose — allowing the case edge to interfere with the ejector spring travel. Samsung’s official case eliminates this variability. All other hardware cutouts — the USB-C port, speaker grilles, microphones, side buttons and power key — are precisely positioned and correctly sized. The raised lip around the camera module provides additional protection for the rear camera array when the phone is placed face-up on a surface. The case provides protection around the phone’s sides and back; the front screen is unprotected, as with most slim cases, and a separate screen protector is recommended for full-device protection.

Wireless Charging · 45W Compatible

Charges Through the Case

The EF-PS938 case back does not block wireless charging — the S25 Ultra charges on any Qi wireless pad with the case fitted. Samsung’s official cases are tested against the S25 Ultra’s wireless charging coil and certified to not interfere with wireless charging at any tier — Samsung Wireless Fast Charging at 15W, standard Qi at 5W–10W, and Samsung’s higher wireless charging speeds are all available through the case. Samsung 45W wired charging via USB-C is unaffected — the USB-C cutout provides full port access and the case adds no perceptible impedance to the USB-C connection. The EF-PS938 is also confirmed compatible with Samsung DeX — the USB-C pass-through allows DeX adapter connection with the case fitted. The Black finish is one of the core case colours in Samsung’s S25 Ultra accessory range, designed to complement the Titanium Black S25 Ultra finish while also pairing neutrally with the other S25 Ultra titanium colourways. The silicone surface remains visually consistent over time — it does not yellow or discolour as some transparent or white silicone cases do with UV exposure.

Right choice if you…

✔ Own a Galaxy S25 Ultra and want Samsung’s official slim case — guaranteed S Pen compatibility and precise hardware cutouts
✔ Use the S Pen regularly — official cutout ensures S Pen inserts and ejects cleanly without case interference
✔ Want wireless charging convenience with the case on — no need to remove case to charge on a Qi pad
✔ Prefer a slim, lightweight silicone finish over a flip wallet case — back and sides protected, minimal bulk

Consider something else if…

✖ You own a Galaxy S25 or S25+ — this case fits only S25 Ultra (SM-S938); S25 uses EF-PS931 and S25+ uses EF-PS936
✖ You want screen protection from the front — this is a back cover only; add a screen protector separately for full device protection
✖ You want a card slot or flip cover — see the Samsung S25 Ultra Smart View Wallet Case for card + screen coverage

Technical Specifications

BrandSamsungModelGalaxy S25 Ultra Silicone CaseMPNEF-PS938CBEGWWEAN / GTIN8806095879482ColourBlackCompatible DeviceSamsung Galaxy S25 Ultra (SM-S938) onlyMaterialPC inner frame + silicone outer layerCase TypeBack cover · sides and rear protectionS PenCompatible — precise slot and ejector cutoutWireless ChargingCompatible · not blockedDimensions81.1 × 166.3 × 12mmWeight~30gWarrantyManufacturer warranty (Samsung)

In the Box

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Samsung Galaxy S25 Ultra Silicone Case — Black (EF-PS938CBEGWW)

Frequently Asked Questions

Will this case fit the Galaxy S25 or S25+?

No — the EF-PS938 is designed exclusively for the Galaxy S25 Ultra (SM-S938). The S25 Ultra has different dimensions and a unique S Pen silo compared to the S25 and S25+. The S25 uses EF-PS931 and the S25+ uses EF-PS936. Always verify the model number before purchasing a Samsung official case.

Does the S Pen still work normally with the case on?

Yes — the EF-PS938 has a precision cutout for the S25 Ultra’s S Pen slot and ejector mechanism. The S Pen can be inserted and ejected normally with the case fitted. Samsung tests S Pen insertion, ejection and magnetic reseating with the official case as part of its accessory certification process.

Can I use Samsung Pay and wireless charging with this case?

Yes to both. Wireless charging works through the case back on any Qi pad. Samsung Pay uses the NFC and MST sensors in the S25 Ultra — the silicone case does not block either. NFC contactless payments function normally with the case fitted.

Will the silicone case discolour or yellow over time?

The Black colourway is not subject to yellowing — yellowing from UV exposure affects transparent and light-coloured silicone cases. The black silicone pigmentation is stable under UV exposure. The matte silicone surface may pick up slight sheen in high-contact areas over extended use, which is normal for silicone materials and does not affect function or protection.

Condition

Brand New — Sealed · Retail Packaging

Warranty

Manufacturer warranty (Samsung)

Delivery

5–6 Working Days · Fully Tracked

—
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Samsung 45W USB-C Super Fast Charging Set — Black—
Samsung USB-C to 3.5mm Headphone Adapter—

Will the Samsung EF-PS938 silicone case fit the Galaxy S25 or S25+?

No — EF-PS938 fits only Galaxy S25 Ultra (SM-S938). S25 uses EF-PS931, S25+ uses EF-PS936. Always verify model number before purchasing.

Does the S Pen work normally with the Samsung S25 Ultra silicone case on?

Yes — the EF-PS938 has a precision cutout for the S Pen slot and ejector. Insert and eject normally with case fitted. Samsung tests S Pen operation with official cases as part of accessory certification.

Does Samsung Pay and wireless charging work with this case?

Yes to both. Wireless charging works through the case back. Samsung Pay (NFC and MST) works normally — the silicone does not block either sensor.

Will the black silicone case yellow over time?

No — yellowing affects transparent and light-coloured silicone from UV exposure. Black silicone pigmentation is UV-stable. The matte surface may develop slight sheen in high-contact areas over time, which is normal for silicone.