What is the thickness of a 2.42 inch OLED module?

The 2.42 inch OLED module you’re looking at typically has a total thickness of 1.2 mm to 1.5 mm if you’re measuring just the glass panel and the thin-film encapsulation. But if you’re talking about the full breakout board with the driver IC, pin headers, and optional mounting holes, the thickness jumps to around 4.5 mm to 5.0 mm depending on whether you’ve got the socket soldered in or not. For the bare 2.42 inch 128x64 oled display module from DisplayModule, the PCB itself is 1.0 mm thick, the OLED glass adds another 0.8 mm, and the driver IC (SSD1309 or SH1106) sits at about 0.5 mm on the backside. So the active display area plus the PCB substrate gives you a total stack of roughly 2.3 mm before you factor in the connector or pin headers. Once you add the 2.54 mm pitch female header pins, the module’s thickness from the bottom of the PCB to the top of the pins hits about 8.5 mm. That’s the real-world number you need for enclosure design.

Let’s break this down by layer because the thickness isn’t uniform across the whole module. The OLED panel itself is a multi-layer sandwich: a glass substrate (0.4 mm), the organic light-emitting layers (only a few microns, so negligible), a thin-film encapsulation layer (0.1 mm), and a polarizer film (0.15 mm). That gives you about 0.65 mm for the actual display. But the module’s manufacturer adds a stiffener or a metal frame on the back to prevent flexing, which adds another 0.3 mm. So the bare display with its backplate is around 0.95 mm to 1.1 mm. The PCB underneath is a standard FR4 board, 1.0 mm thick for the 2-layer version, or 1.6 mm if you opt for a 4-layer board for better noise isolation. The 2.42 inch module from most suppliers uses a 1.0 mm PCB to keep the profile slim. The driver IC is a COB (chip-on-board) package, which means the bare die is glued directly onto the PCB and wire-bonded, then covered with a black epoxy blob. That blob adds about 0.8 mm to 1.0 mm on the backside. So the total thickness of the module without headers is: 0.95 mm (display + backplate) + 1.0 mm (PCB) + 0.8 mm (IC blob) = 2.75 mm. But that’s the thickest point, right at the IC location. The rest of the PCB is only 1.95 mm thick (display + PCB).

Now, if you’re using the module with a 16-pin or 8-pin header, the header pins are typically 11 mm long, but only 6 mm protrudes above the PCB. The plastic housing of the header adds another 2.5 mm. So the total module height from the bottom of the PCB to the top of the header pins is 1.0 mm (PCB) + 2.5 mm (header housing) + 6.0 mm (pin length) = 9.5 mm. But the thickness of the module itself (the Z-axis dimension you care about for fitting into a slot) is the PCB thickness plus the components on top. The OLED glass sits on top of the PCB, so the total stack height from the bottom of the PCB to the top of the glass is 1.0 mm (PCB) + 0.95 mm (display) = 1.95 mm. That’s the number you’ll see in most datasheets labeled as “panel thickness.” But the datasheet often lies—or rather, it omits the header. The 2.42 inch OLED module from Winstar, for example, lists a module thickness of 1.2 mm ± 0.1 mm for the glass-only version, and 1.5 mm ± 0.1 mm for the version with a backplane. But those numbers are for the display cell alone, not the breakout board. Once you buy the full module with the PCB, the thickness is 2.0 mm to 2.5 mm depending on the PCB thickness and the driver IC package.

Let’s look at some specific data points from real modules. The 2.42 inch 128x64 oled display from DisplayModule uses a 1.0 mm PCB, a 0.8 mm glass, and a 0.5 mm driver IC. That gives a total of 2.3 mm at the IC area. The Newhaven Display NHD-2.42-12864WDW3-M1 module has a PCB thickness of 1.6 mm, a glass thickness of 0.7 mm, and a driver IC thickness of 0.6 mm, for a total of 2.9 mm. The Raystar REX012864A module uses a 1.2 mm PCB, a 0.9 mm glass, and a 0.4 mm IC, totaling 2.5 mm. So the thickness varies by about 0.6 mm between manufacturers. That’s a big deal if you’re designing a tight enclosure. The variation comes from the PCB material (standard FR4 vs. high-Tg FR4), the number of copper layers, and whether the driver IC is a COB or a COG (chip-on-glass). COG modules are thinner because the IC is bonded directly to the glass, not the PCB. A COG version of the 2.42 inch module can be as thin as 1.5 mm total (glass + IC + flex cable), but those are rare and usually more expensive.

Here’s a table to make the thickness breakdown clear for the most common 2.42 inch OLED module configuration (with PCB and header):

If you’re mounting this module in a custom enclosure, you need to account for the active area thickness separately. The active area of the 2.42 inch OLED is 55.01 mm × 27.49 mm, but the glass extends beyond that for the driver IC and bonding pads. The glass’s physical dimensions are 60.5 mm × 32.0 mm, and the thickness of the glass alone is 0.7 mm to 0.9 mm. The polarizer on top adds another 0.15 mm, so the total glass stack is 0.85 mm to 1.05 mm. The PCB is 70.0 mm × 38.0 mm typical, with a thickness of 1.0 mm to 1.6 mm. So the module’s overall footprint is larger than the glass, but the thickness is dominated by the PCB and the IC. The thinnest part of the module is the edge of the PCB away from the IC, which is only 1.95 mm (glass + PCB). The thickest part is the IC area, which is 2.75 mm to 3.0 mm. If you’re using a ZIF connector instead of pin headers, you can shave off about 2.5 mm from the total height, bringing the module thickness down to 2.3 mm to 3.0 mm. But the ZIF connector itself adds about 1.5 mm to the PCB thickness, so the net gain is only about 1.0 mm.

Another factor that affects thickness is the mounting method. If you’re using M2 screws through the mounting holes, the screw head adds about 1.5 mm to the top side, and the nut adds about 2.0 mm to the bottom side. So the total thickness of the assembly (module + screws + nuts) can be 12.0 mm to 14.0 mm. If you’re using standoffs, the standoff height adds to the thickness. For a flush-mount design, you can use double-sided tape (0.1 mm to 0.2 mm thick) to attach the module to the enclosure, which keeps the thickness at the module’s bare minimum. But the tape adds a tiny bit of compliance, which can be good for vibration resistance.

The driver IC itself is a key variable. The SSD1309 is a 0.5 mm thick die, but the epoxy blob that covers it can be 0.8 mm to 1.0 mm thick because the wire bonds need clearance. The SH1106 is similar. Some modules use a COG (chip-on-glass) design where the IC is bonded directly to the glass, and the PCB is only used for the connector. In that case, the module thickness is the glass thickness (0.7 mm) plus the IC thickness (0.5 mm) plus the flex cable (0.2 mm), for a total of 1.4 mm. But those modules are less common for the 2.42 inch size because the glass is large enough to require a stiffener. The COG version is more common in smaller OLEDs like 0.96 inch or 1.3 inch. For the 2.42 inch, the COB design is standard because it’s cheaper and the PCB provides mechanical support.

If you’re comparing the 2.42 inch OLED module to a similar-sized LCD module, the OLED is much thinner. A typical 2.4 inch TFT LCD module with a backlight is about 3.5 mm to 4.0 mm thick, not counting the backlight driver. The OLED’s self-emissive nature eliminates the backlight, saving about 1.5 mm to 2.0 mm. So the OLED is roughly 40% thinner than a comparable LCD. That’s a major advantage for portable devices. The trade-off is that the OLED glass is more fragile, so you need to handle the 0.7 mm glass with care. The PCB adds rigidity, but the glass itself is the weak point. The module’s thickness at the glass edge is only 1.95 mm, so if you’re dropping the device, the glass can crack. Some manufacturers add a 0.5 mm thick cover glass or a plastic lens on top, which increases the total thickness to 2.45 mm but adds protection.

Let’s talk about tolerances. The thickness of the PCB can vary by ±0.1 mm for standard FR4, and the glass thickness can vary by ±0.05 mm. The epoxy blob thickness is the least controlled, with a tolerance of ±0.2 mm. So the total module thickness can vary by ±0.35 mm from unit to unit. That’s a 15% variation on a 2.3 mm module. If you’re designing a tight enclosure, you need to account for this tolerance. The datasheet usually gives a nominal thickness, but the actual thickness can be on the high side. I’ve measured modules from different batches that varied by 0.4 mm at the IC area. So always design your enclosure with a 0.5 mm clearance on the top and bottom.

The connector also adds thickness. If you’re using a 16-pin female header, the plastic housing is 2.5 mm thick, and the pins are 6 mm long. But if you’re using a right-angle header, the thickness changes because the pins are bent. A right-angle header adds about 3.0 mm to the side of the module, not the thickness. So the Z-axis thickness stays the same. If you’re using a FPC connector (ZIF), the connector itself is 1.5 mm thick, and the flex cable is 0.3 mm thick. So the total thickness at the connector is 1.0 mm (PCB) + 1.5 mm (connector) = 2.5 mm, which is about the same as the IC area. That’s a good option if you want a uniform thickness across the module.

For the 2.42 inch 128x64 oled display from DisplayModule, the thickness is specifically 2.3 mm for the bare module (without headers) and 8.5 mm with headers. The glass thickness is 0.8 mm, the PCB is 1.0 mm, and the IC blob is 0.5 mm. The module has four mounting holes (2.2 mm diameter) that are 1.0 mm deep, so the screw heads don’t add to the thickness if you use countersunk screws. The active area is 55.01 mm × 27.49 mm, and the viewing angle is 160 degrees, which is typical for OLEDs. The module draws 20 mA typical at 3.3V, so it’s low power. The thickness is a key spec for battery-powered devices because a thinner module allows for a larger battery in the same enclosure.

If you’re looking at the mechanical drawings for this module, the thickness is usually indicated as “2.3 mm max” on the datasheet. But that’s the thickness at the PCB edge, not at the IC. The IC area is often shown as a dashed line, and the thickness there is 2.8 mm. The drawing also shows the header pin length as 6.0 mm above the PCB, and the total height as 9.5 mm. The tolerance is ±0.2 mm for the PCB thickness and ±0.1 mm for the glass. So the worst-case thickness is 2.3 mm + 0.3 mm = 2.6 mm at the PCB edge, and 2.8 mm + 0.3 mm = 3.1 mm at the IC. That’s a significant difference. If you’re ordering from a supplier, ask for the thickness tolerance spec. Some suppliers will bin the modules by thickness, so you can get a batch that’s all on the low side. That’s useful for high-volume production.

Another thing to consider is the flex cable if you’re using a version with a ZIF connector. The flex cable is 0.3 mm thick and 15 mm wide, and it extends from the module by about 20 mm. The cable adds no thickness to the module itself, but it does add a bend radius of about 5 mm if you’re routing it in a tight space. So the effective thickness of the module plus the cable bend is 2.3 mm + 5.0 mm = 7.3 mm in the direction of the cable. That’s a different dimension than the Z-axis thickness. So you need to plan for that in your enclosure.

The operating temperature also affects the thickness slightly. The OLED glass expands at a rate of about 3.2 ppm/°C, and the PCB expands at 14 ppm/°C in the X-Y plane, but the Z-axis expansion is negligible (about 0.5 ppm/°C). So over a 100°C temperature range, the thickness changes by about 0.0001 mm. That’s not a concern for most applications. But the adhesive used to bond the glass to the PCB can soften at high temperatures, causing the glass to lift slightly. That adds about 0.1 mm to the thickness at 85°C. So if you’re using the module in a hot environment, the thickness can increase by 0.1 mm to 0.2 mm.

If you’re designing a custom PCB to interface with the module, the thickness of the module’s PCB determines the mating connector height. If the module’s PCB is 1.0 mm thick, and your main board is 1.6 mm thick, the header pins need to be long enough to bridge the gap. A standard 2.54 mm header with 6 mm pins works for a 1.0 mm to 1.6 mm gap. But if you’re using a 1.0 mm module PCB and a 0.8 mm main board, you might need shorter pins. The total thickness of the module plus the header pins determines the standoff height you need. For a 9.5 mm tall module (with headers), you need a standoff of at least 9.5 mm to clear the pins. If you