High Temperature Passive RFID Tags: What Can They Really Handle?
This question usually comes after something breaks. A passive RFID tag worked fine during testing. Then it went into a hot process. Not extreme, not dramatic—just consistently hot. Weeks later, reads became unstable. Then silent. That’s when people start searching for high temperature passive RFID tags , hoping the word “passive” somehow makes things simpler. It doesn’t. Passive Does Not Mean Resistant Let’s get this out of the way. Passive RFID tags do not handle heat better because they are passive. In many cases, they handle heat worse. No battery means fewer components, yes. But the weak points—antenna structure, bonding, encapsulation—are still there. Heat does not care whether a tag has power or not. What “High Temperature” Actually Means in Passive Tags In real projects, “high temperature” usually falls into one of these ranges: 120–150°C, long-term exposure 180–220°C, repeated short cycles 250°C+, brief process contact Most passive RFID tags only survive one ...