BZX84C5V1LT1G - 5.1V 250mW Zener Diode | onsemi
MPN： BZX84C5V1LT1G ✓ 啟用中BZX84C5V1LT1G 概覽
A Zener diode is a voltage-regulator diode that operates primarily in reverse breakdown. In that region, it maintains a relatively controlled voltage while diverting current through its specified power rating. The BZX84C5V1LT1G belongs to the broader discrete-semiconductor hierarchy: Zener diode, voltage regulator, and semiconductor protection or regulation device.
Key verified features include a nominal Zener voltage of 5.1 V, a 250 mW device rating, and a tolerance of approximately ±6%. The part is packaged in SOT-23-3, also identified as TO-236 in the distributor data. Its compact footprint supports high-density printed circuit boards, including cellular phones, hand-held portables, and other compact electronic systems.
The diode is intended for low-power regulation rather than high-current power conversion. When used as a clamp or reference element, the application must keep the operating current and dissipated power within the manufacturer’s specified limits. The SOT-23-3 package also requires attention to PCB copper area, thermal conditions, and assembly orientation because reverse-breakdown operation generates heat proportional to current.
Typical applications include 5.1 V signal clamping, low-voltage reference generation, protection in compact consumer equipment, and auxiliary regulation in industrial or automotive electronic systems. It is particularly suitable when a small SOT-23 footprint and a nominal 5.1 V Zener voltage are more important than high-power handling.
For reliable PCB implementation, identify the anode and cathode correctly, maintain the specified orientation, and provide a current path that allows the Zener to enter its intended operating region. Verify leakage, dynamic resistance, temperature behavior, and power dissipation against the manufacturer datasheet when precision regulation is required. This product-data page combines verified distributor specifications, official-series information, and engineering guidance for compact Zener-diode designs.
直接替換替代品，適用於 BZX84C5V1LT1G — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
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BZX84C5V1LT1G 最大額定值與電氣特性
| Diode Type | Single Zener voltage-regulator diode |
| Nominal Zener Voltage | 5.1 V |
| Zener Voltage Tolerance | Approximately ±6% |
| Rated Power | 250 mW |
| Power Dissipation | 350 mW maximum listed in third-party part data |
| 封裝 | SOT-23-3 (TO-236) |
| 安裝類型 | Surface mount |
| Device Classification | Voltage regulator diode |
| Construction | Planar die construction |
| Assembly Suitability | Designed for automated assembly processes |
| RoHS 狀態 | RoHS-compliant version identified in verified part data |
| Lead-Free Status | Lead-free version identified in verified part data |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
BZX84C5V1LT1G sot-23-3 (to-236) 腳位配置指南
BZX84C5V1LT1G（sot-23-3 (to-236) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： BZX84C5V1LT1G.
請參閱 資料表 以查看完整腳位配置。
典型應用
BZX84C5V1LT1G 適用於 6 應用s: 5.1 V Signal Clamping, Low-Power Voltage Reference, Portable Consumer Electronics, Industrial Control Interface, Automotive Electronic Protection, High-Density PCB Protection.
5.1 V Signal Clamping
BZX84C5V1LT1G fits compact 5.1 V signal-clamping circuits where a nominal 5.1 V Zener voltage and approximately ±6% tolerance are sufficient. Place the diode across the protected signal or supply node and use a series current-limiting element so the shunt current cannot exceed the 250 mW device rating. The SOT-23-3 package minimizes PCB area, while the approximately 5.1 V breakdown point limits the nominal excursion seen by downstream circuitry. Check the manufacturer’s dynamic resistance, leakage, and temperature characteristics when the clamp must remain tight during fast transients.
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Low-Power Voltage Reference
Use BZX84C5V1LT1G as a low-cost 5.1 V reference element in compact analog or control circuitry when the approximately ±6% tolerance is compatible with the system. The diode operates in reverse breakdown with a controlled nominal 5.1 V condition, so the bias network must establish a stable current and the load must not pull the node outside the intended operating region. Compared with a larger precision reference, the SOT-23 part saves board area but offers less accuracy and tighter power-budget constraints. Validate line, load, temperature, and startup behavior before using it in a precision measurement path.
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Portable Consumer Electronics
The BZX84C5V1LT1G is appropriate for portable and hand-held equipment where a compact SOT-23-3 Zener can provide local 5.1 V regulation or transient clamping. Its small footprint supports dense boards such as cellular phones and other portable products, while the 250 mW rating suits low-power protection nodes rather than high-current rails. The PCB designer should maintain short return paths, adequate copper for heat spreading, and correct cathode orientation. If the equipment exposes the node to large ESD or surge events, add the appropriate upstream protection because the Zener’s verified rating does not establish a surge-hardening claim.
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Industrial Control Interface
BZX84C5V1LT1G can support a 5.1 V clamp or auxiliary regulation function in industrial control interfaces where the PCB area is constrained and moderate precision is acceptable. Place the device near the protected connector or signal-conditioning node to reduce trace-borne transient exposure, and use a current-limiting resistor or source impedance to control diode current. The approximately ±6% nominal tolerance must be checked against the control-system margin. Because the verified data does not provide a complete temperature or automotive qualification statement, use additional protection or a graded alternative where harsher environmental requirements apply.
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Automotive Electronic Protection
BZX84C5V1LT1G may be evaluated in low-power automotive electronic circuits for a nominal 5.1 V clamp or bias node. The SOT-23-3 package is compact and the verified part data identifies a lead-free, RoHS-compliant version, but the retrieved data does not explicitly confirm AEC-Q100 qualification, automotive temperature limits, or transient ratings. Therefore, use it only after checking the current onsemi datasheet and system qualification requirements. The design must include suitable series current limiting, robust grounding, and protection for load-dump or inductive-transient paths rather than relying on this diode alone.
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High-Density PCB Protection
BZX84C5V1LT1G is useful on high-density printed circuit boards where a small SOT-23-3 footprint is required close to a sensitive node. Its nominal 5.1 V Zener characteristic can limit moderate overvoltage conditions, but placement and current limiting determine its effectiveness. Keep the diode connection short, preserve the exposed copper thermal path, and avoid long loops that increase transient inductance. The verified manufacturer-series information identifies suitability for high-density boards, while the distributor specification confirms the 250 mW class. Verify the actual operating current and temperature rise so the diode does not become the limiting element during a sustained fault.
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推薦產品摘要
工程參考資料，適用於 BZX84C5V1LT1G — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | BZX84C5V6LT1G | BZX84B5V1LT1G | BZX84-A12215 | BZX84-C5V1 | BZX84C5V1 |
|---|---|---|---|---|---|---|
| Package | SOT-23-3 (TO-236) | SOT-23-3 (TO-236) | SOT-23-3 (TO-236) | SOT-23-3 (TO-236) | SOT23 (TO-236AB) | SOT-23-3 (TO-236) |
| Brand | onsemi | onsemi | onsemi | onsemi | Nexperia | onsemi |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
主要差異化特點
- Verified nominal voltage and tolerance (對比BZX84C5V6LT1G)
- Compact onsemi SOT-23-3 form factor (對比BZX84-C5V1)
- Low-power discrete protection role (對比BZX84B5V1LT1G)
設計說明
The verified target rating is 250 mW, so calculate the worst-case Zener current and series-resistor dissipation before layout. For a nominal 5.1 V clamp, use the applied voltage, the chosen Zener operating point, and the maximum load current as inputs. Confirm the actual diode voltage at the intended current rather than assuming the nominal 5.1 V value, then verify that the PCB thermal path keeps the device within its datasheet limits.
Place BZX84C5V1LT1G close to the node it protects and keep the cathode connection and ground return short. Use the correct SOT-23-3 orientation from the manufacturer datasheet, because the complete pin assignment was not available in the verified search data. Provide local copper around the device where board space permits, but avoid placing sensitive high-impedance traces immediately beside the Zener’s return path if transient current could couple into them.
Do not treat BZX84C5V1LT1G as a precision reference or an unlimited surge protector. Its verified nominal voltage is 5.1 V with approximately ±6% tolerance, and the part is a 250 mW device. Verify reverse leakage, dynamic resistance, temperature behavior, and test-current dependence from the manufacturer datasheet before using it in a tight clamp, precision bias, or automotive transient-protection requirement.
合規資訊
The verified part data identifies a lead-free, RoHS-compliant version and automated-assembly suitability. REACH, AEC-Q100, halogen-free, and conflict-minerals status were not established by the supplied data.
