BZX884-C8V2 - 8.2V 250mW Zener Diode SOD882 | Nexperia
料号： BZX884-C8V2 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.16 | $0.16 |
| 10 | $0.14 | $1.40 |
| 100 | $0.1 | $10.00 |
| 1,000 | $0.07 | $70.00 |
| 5,000 | $0.05 | $250.00 |
BZX884-C8V2 概述
A Zener diode is a specialized silicon pn-junction diode engineered to operate in the reverse-breakdown region, where it maintains a nearly constant voltage across its terminals despite substantial current variation. Zeners sit in the discrete-semiconductor hierarchy as diodes -> semiconductor devices, and they function as single-junction voltage-reference elements within the broader power-management and signal-conditioning IC taxonomy. The BZX884-C8V2's 1.0 mm x 0.6 mm x 0.5 mm footprint occupies only about 1.17 mm² of board space, making it the functional equivalent of a SOT23 Zener at roughly one-third the footprint.
Key features of the BZX884-C8V2 include a working-voltage range that covers the E24 standard 2.4 V to 75 V across the BZX884 family, ±5% voltage tolerance, and a low-leakage, ultra-small plastic package compatible with high-density SMT assembly lines. The non-repetitive peak reverse power dissipation and thermal behavior are characterized for general-purpose clamp and reference designs.
Technically, the BZX884-C8V2 is fabricated using Nexperia's planar Zener process on a leadless SOD882 substrate. The diode exhibits the classic Zener-versus-avalanche transition behavior around 5.6 V; at 8.2 V the breakdown mechanism is dominantly avalanche, which gives a positive temperature coefficient on Vz and good stability for reference-rail applications. The hermetic leadless package also provides low parasitic inductance, making it usable as a sub-ns transient suppressor.
Typical applications include voltage reference for ADCs and DACs in portable/wearable products, logic-level clamping on data lines (USB, HDMI, GPIO), overvoltage protection on low-power DC rails, handheld medical and IoT sensor boards, and any 8.2 V reference point in automotive and industrial subsystems.
When designing with this part, choose series resistor values that keep Iz below the maximum rated and below to prevent failure, and respect the 250 mW Ptot limit at the chosen ambient temperature.
This page synthesizes distributor pricing, drop-in BZX884 same-package alternatives, and practical design notes not found on a single distributor product page.
直接替换替代料： BZX884-C8V2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
BZX884-B8V2
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BZX884-C8V2-Q
✅ 直接替换📋 参考替代料（不在目录中）
BZX884-C7V5
✅ 直接替换📋 参考替代料（不在目录中）
BZX884-C9V1
✅ 直接替换📋 参考替代料（不在目录中）
BZX884S-C8V2-Q
✅ 直接替换📋 参考替代料（不在目录中）
BZX884-C8V2,315
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BZX884-C8V2 最大额定值与电气特性
| Device Type | Zener Diode (Voltage Regulator) |
| Nominal Zener Voltage (Vz) | 8.2 V |
| Tolerance Series | C (±5%) |
| Total Power Dissipation (Ptot) | ≤ 250 mW |
| 封装 | SOD882 (DFN1006-2), leadless |
| Footprint Area | ≈ 1.17 mm² (approximately SOT23) |
| Package Dimensions | 1.0 mm × 0.6 mm × 0.5 mm |
| 安装类型 | Surface Mount (SMD) |
| Working Voltage Range (family) | nom. 2.4 V to 75 V (E24 range) |
| Tolerance Series Available | ±2% (B) and ≈ ±5% (C) |
| Terminal Position | BOTTOM |
| Terminal Form | NO LEAD |
| Number of Terminals | 2 |
| Package Shape | RECTANGULAR |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
BZX884-C8V2 引脚配置
| 引脚 1 | Cathode (K) — Cathode terminal (band-marked) |
| 引脚 2 | Anode (A) — Anode terminal |
典型应用
BZX884-C8V2 适用于 7 应用s: Portable Device 8.2V Reference Rail, ADC/DAC Voltage Reference Bias, USB / HDMI Data Line Clamping, Automotive Low-Power Rail Protection, IoT Sensor Node Voltage Limit, Handheld Medical Device Bias Reference, Industrial Control Logic Level Shifting.
Portable Device 8.2V Reference Rail
The BZX884-C8V2 provides a compact 8.2 V reference for portable and wearable electronics that need a stable sub-rail for low-power analog blocks. Its 1.0 mm × 0.6 mm SOD882 footprint frees roughly two-thirds of the PCB area that a SOT23 Zener would occupy, critical in wearables and hearables where board real estate is measured in mm². At 8.2 V the breakdown mechanism is dominantly avalanche, giving a positive temperature coefficient on Vz and good long-term drift behavior. A typical implementation uses a series resistor from a higher-voltage rail (e.g., 12 V Li-ion or 5 V USB) sized so Iz sits near the test current; Ptot stays comfortably below the 250 mW limit when the rail-to-load delta is moderate.
推荐
ADC/DAC Voltage Reference Bias
The BZX884-C8V2 serves as a low-noise bias point for ADC and DAC analog supply rails in low-power instrumentation. Its avalanche-mode breakdown at 8.2 V produces a relatively low broad-band noise density compared to a 5.6 V Zener (where Zener-mode noise dominates). The ±5% C-tolerance is acceptable for general-purpose 12-/14-bit converters; for 16-bit+ precision, use the BZX884-B8V2 (±2% tolerance) drop-in variant. Place the diode close to the converter AVDD pin with a 100 nF ceramic bypass to suppress injected switching noise from digital rails.
推荐
USB / HDMI Data Line Clamping
The BZX884-C8V2 clamps transients on low-voltage data lines such as USB 2.0 D+/D-, HDMI TMDS, and general GPIO lines where the signal swing can approach or exceed the I/O controller's absolute-maximum rating. The leadless SOD882 package gives very low parasitic inductance, enabling effective sub-nanosecond transient suppression when paired with a small series resistor. Its 8.2 V Vz clamps just above typical 5 V or 3.3 V rail levels, protecting downstream ESD-sensitive ASICs. For full ESD compliance, combine with a dedicated TVS array; the BZX884-C8V2 handles steady-state overvoltage events but is not rated for the IEC 61000-4-2 discharge waveform.
推荐
Automotive Low-Power Rail Protection
The BZX884-C8V2-Q (AEC-Q101 variant) and BZX884-C8V2-QYL (automotive-grade reel code) extend the BZX884-C8V2 into automotive subsystems such as body-control modules, sensor signal conditioning, and low-voltage ECU rails. At 8.2 V the diode clamps load-dump and jump-start transients on 12 V automotive buses, protecting downstream 5 V regulators from over-voltage events. The 250 mW Ptot rating is sufficient for the brief transient energy in automotive environments; for continuous clamp duty, derate to roughly half the Ptot rating. The DFN1006-2 footprint integrates cleanly into dense automotive PCB layouts.
推荐
IoT Sensor Node Voltage Limit
The BZX884-C8V2 limits voltage on battery-powered IoT sensor nodes harvesting from energy-harvesting sources (small solar panels, thermoelectric generators, piezoelectric harvesters) where the open-circuit voltage can exceed the MCU's absolute-maximum rating. Its 1.17 mm² footprint integrates easily onto coin-cell-sized sensor boards alongside wireless MCUs. At 8.2 V it clamps the harvester output to a safe level for downstream 3.3 V LDO regulators feeding low-power MCUs. Quiescent leakage in the nanoampere range preserves battery life during sleep cycles.
推荐
Handheld Medical Device Bias Reference
The BZX884-C8V2 provides a compact 8.2 V bias reference for handheld medical devices such as glucose meters, pulse oximeters, and portable patient monitors. Its small SOD882 package enables the miniaturization required for wearable or pocket-sized form factors. The ±5% tolerance is acceptable for non-critical bias points such as op-amp mid-rails and sensor excitation; for measurement-critical references, upgrade to the ±2% BZX884-B8V2 drop-in variant. Low leakage current preserves battery life during extended monitoring sessions between charges.
推荐
Industrial Control Logic Level Shifting
The BZX884-C8V2 acts as a simple logic-level shifter or level-clamp element in industrial 24 V bus interfaces, providing a defined voltage reference for optocoupler LED drive circuits or level-detection comparators. At 8.2 V it sets a precise threshold between 24 V logic high and 0 V logic low, with the ±5% tolerance allowing reliable detection across the industrial temperature range. The 250 mW Ptot rating handles continuous LED drive currents up to about 30 mA at 8.2 V. For higher-current industrial drivers, use a dedicated shunt regulator or TVS array instead.
推荐
推荐产品汇总
工程参考数据： BZX884-C8V2 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | BZX884-B8V2 | BZX884-C8V2-Q | BZX884-C7V5 | BZX884-C9V1 | BZX884S-C8V2-Q | BZX884-C8V2,315 |
|---|---|---|---|---|---|---|---|
| Package | SOD882 (DFN1006-2) | SOD882 (DFN1006-2) - same | SOD882 (DFN1006-2) - same | SOD882 (DFN1006-2) - same | SOD882 (DFN1006-2) - same | SOD882BD (DFN1006BD-2) - same 2-pin pattern, AOI-friendly flanks | SOD882 (DFN1006-2) - same |
| Brand | Nexperia | Nexperia | Nexperia | Nexperia | Nexperia | Nexperia | Nexperia |
| Nominal Zener Voltage (Vz) | 8.2 V | 8.2 V | 8.2 V | 7.5 V (-8.5%) | 9.1 V (+11%) | 8.2 V | 8.2 V |
| Tolerance Series | C (±5%) | B (±2%) | C (±5%) | C (±5%) | C (±5%) | C (±5%) | C (±5%) |
| Power Dissipation (Ptot) | ≤ 250 mW | ≤ 250 mW | ≤ 250 mW | ≤ 250 mW | ≤ 250 mW | ≤ 250 mW | ≤ 250 mW |
| Automotive Grade (AEC-Q101) | No (standard grade) | No | Yes (AEC-Q101) | No | No | Yes (AEC-Q101, side-wettable flanks) | No (reel packaging code) |
| Package Style | Leadless DFN1006-2 | Leadless DFN1006-2 | Leadless DFN1006-2 | Leadless DFN1006-2 | Leadless DFN1006-2 | DFN1006BD-2 side-wettable flanks | Leadless DFN1006-2 |
| Footprint Area | ≈ 1.17 mm² | ≈ 1.17 mm² | ≈ 1.17 mm² | ≈ 1.17 mm² | ≈ 1.17 mm² | ≈ 1.17 mm² (with side-wettable flanks) | ≈ 1.17 mm² |
| Working Voltage Family Range | 2.4 V to 75 V (E24) | Same BZX884 family | Same BZX884 family | Same BZX884 family | Same BZX884 family | Same BZX884 family | Same BZX884 family |
关键差异点
- Higher precision drop-in alternative available within the same family （对比 BZX884-B8V2)
- Automotive-grade variant with identical electrical ratings （对比 BZX884-C8V2-Q)
- Compact 1.17 mm² footprint replaces SOT23 Zeners （对比 Generic SOT23 Zener diodes)
设计说明
Estimated: at Iz = 20 mA and Vz = 8.2 V, the steady-state dissipation is P = Vz × Iz = 8.2 V × 20 mA = 164 mW, which is roughly 66% of the 250 mW Ptot rating - derate further when ambient exceeds 25 °C or when the diode shares a small thermal pad with other heat sources. Mount the SOD882 on at least the standard 1.17 mm² footprint of copper with thermal vias to the inner plane to keep junction temperature within the safe operating area.
Choose the series resistor Rs so that Iz stays within the test-current range at the expected supply tolerance. Estimated: with Vin = 12 V, Vz = 8.2 V, and Iz(desired) = 5 mA minimum, Rs(max) = (12 - 8.2) / 5 mA = 760 Ω; using Rs = 470 Ω gives Iz ≈ 8.1 mA at 12 V and Iz ≈ 13 mA at 14.4 V - both safely below Ptot = 250 mW. Confirm Iz stays above the knee current (typically 1-5 mA for small-signal Zeners) under minimum supply and maximum load conditions.
Place the BZX884-C8V2 close to the load pin it protects or feeds, with the cathode-bar marking visible after assembly. Use a 100 nF X7R ceramic bypass capacitor in parallel with the Zener to shunt high-frequency noise above the diode's useful bandwidth. For high-volume SMT lines, ensure the pick-and-place nozzle accounts for the SOD882's small 1.0 mm × 0.6 mm body and use a 0.5 mm solder stencil aperture to prevent solder bridging between the two terminals.
Do not use BZX884-C8V2 for repetitive high-current transient suppression - its 250 mW Ptot rating is for steady-state dissipation, and transient peak power handling is limited. For ESD or surge protection requiring IEC 61000-4-2 compliance, use a dedicated TVS array instead. Also avoid mixing C-tolerance (±5%) and B-tolerance (±2%) parts on the same reference node unless intentionally calibrating; the 60% reduction in initial accuracy tolerance may shift a tuned circuit outside its design window.
合规信息
RoHS compliant per Nexperia product page. AEC-Q100 not applicable for standard grade; for AEC-Q101 automotive grade use BZX884-C8V2-Q or BZX884-C8V2-QYL variants. Halogen-free status not explicitly stated in the provided data.
