CH320BPT - 40V 350mA Schottky Rectifier SOD-123 | Chenmko
料号： CH320BPT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.18 | $0.18 |
| 10 | $0.16 | $1.60 |
| 100 | $0.13 | $13.00 |
| 500 | $0.11 | $55.00 |
| 1,000 | $0.09 | $90.00 |
| 3,000 | $0.07 | $210.00 |
CH320BPT 概述
A Schottky barrier rectifier is a semiconductor diode that uses a metal-semiconductor junction rather than a PN junction to provide rectification. The absence of minority-carrier recombination gives Schottky diodes a much lower forward voltage drop (typically 0.3 to 0.6 V versus 0.7 to 1.0 V for silicon PN diodes) and a much faster reverse recovery time, typically on the order of nanoseconds. Schottky rectifiers belong to the broader family of discrete diodes within discrete semiconductors, and they are widely used in switch-mode power supplies, freewheeling positions, polarity protection, and DC-DC converter secondary-side rectification where efficiency and switching speed outweigh the need for high reverse breakdown voltage.
Key differentiating specifications for the CH320BPT include its 40 V maximum repetitive peak reverse voltage (VRRM), 350 mA average rectified forward current (IF(AV)), 1 A non-repetitive peak forward surge current (IFSM), a forward voltage of 0.6 V maximum at IF = 200 mA, an operating junction temperature range of -55 °C to +125 °C, and surface-mount SOD-123 packaging. The marking code on the device is BA6, which aids in identification after reflow soldering. These parameters collectively place the CH320BPT in the low-power Schottky rectifier category intended for compact, high-density designs.
Technically, the device is fabricated using a planar Schottky barrier process on a silicon substrate, with a single die encapsulated in a SOD-123 outline featuring gull-wing leads and an exposed cathode indicator band on the body. The thermal resistance junction-to-ambient depends on PCB copper area; on the standard JEDEC EIA/JESD51 reference board it is approximately 340 °C/W. The cathode is identified by the marked band on the package, and the polarity is critical for correct PCB installation.
Typical applications include low-voltage DC-DC buck converters as freewheeling or synchronous-rectifier-replacement diodes, reverse polarity protection on USB and battery charger inputs, low-current power OR-ing for redundant supplies, signal clamping and demodulation in radio receivers, and small solar panel or photovoltaic cell blocking diodes. The 40 V reverse rating covers 12 V and 24 V nominal rails with ample transient margin.
Designers should ensure that the average forward current, peak surge current, and reverse voltage limits are respected, particularly during inrush events. Adequate PCB copper pad area is essential for heat dissipation, and the cathode band orientation must match the PCB silkscreen. For high-frequency switching applications, verify that switching losses and junction capacitance are within acceptable limits.
This page synthesizes distributor data, voltage and current specifications, and practical design notes for the CH320BPT to give engineers a consolidated view beyond what the manufacturer datasheet alone provides.
直接替换替代料： CH320BPT ——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：
CH320BPT-B
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
B5819W
✅ 直接替换📋 参考替代料（不在目录中）
BAT41ZFILM
✅ 直接替换📋 参考替代料（不在目录中）
PMEG3020EH
✅ 直接替换📋 参考替代料（不在目录中）
VSKY0540S40S
✅ 直接替换📋 参考替代料（不在目录中）
CH320BPT 最大额定值与电气特性
| Manufacturer | Chenmko Enterprise Co. Ltd. |
| Product Type | Schottky Barrier Rectifier |
| 封装 | SOD-123 |
| 安装类型 | Surface Mount |
| Marking Code | BA6 |
| Maximum Repetitive Peak Reverse Voltage (VRRM) | 40 V |
| Average Rectified Forward Current (IF(AV)) | 350 mA |
| Non-Repetitive Peak Forward Surge Current (IFSM) | 1 A |
| Forward Voltage (VF max) | 0.6 V at IF = 200 mA |
| Reverse Recovery Time (trr) | approximately 1 ns |
| 工作结温范围 | -55 °C to +125 °C |
| Storage Temperature Range | -55 °C to +150 °C |
| Diode Configuration | Single |
| Polarity | Cathode band |
| RoHS 状态 | Compliant |
CH320BPT 引脚配置
| 引脚 1 | Anode — Anode terminal (positive), unmarked side of the SOD-123 package |
| 引脚 2 | Cathode — Cathode terminal (negative), indicated by the marked band on the package body |
典型应用
CH320BPT 适用于 6 应用s: Reverse Polarity Protection, DC-DC Buck Converter Freewheeling, Solar Panel Blocking Diode, Signal Demodulation and Clamping, Power OR-ing for Redundant Supplies, Portable and Wearable Device Rails.
Reverse Polarity Protection
The CH320BPT serves as a low-loss blocking diode in reverse polarity protection circuits for USB chargers, battery packs, and low-voltage DC inputs. With 40 V VRRM and 350 mA IF(AV), it comfortably covers 5 V and 12 V rails while maintaining a forward voltage loss of only 0.6 V at 200 mA. Placed in series with the supply, the Schottky junction blocks reverse voltage up to 40 V until the user corrects the polarity. Designers should size upstream fuses or PTCs to handle the 1 A IFSM rating during capacitive-load inrush events on connection.
推荐
DC-DC Buck Converter Freewheeling
In low-power buck converters switching at 100 kHz to 1 MHz, the CH320BPT can serve as a freewheeling diode in place of a synchronous MOSFET when simplicity and BOM cost outweigh peak efficiency. Its approximately 1 ns reverse recovery time keeps switching losses low, while the 0.6 V forward drop at 200 mA produces manageable conduction loss below 350 mA load. The 40 V VRRM rating provides ample margin for 12 V input rails. Pair the CH320BPT with a small ferrite inductor and verify that peak inductor current plus ripple stays below 350 mA average.
推荐
Solar Panel Blocking Diode
The CH320BPT functions as a low-loss blocking diode in small photovoltaic or solar charging circuits where reverse current leakage from the battery into the panel at night must be prevented. Its 0.6 V forward drop at 200 mA minimizes power wasted in the blocking element, and the 40 V rating comfortably handles 12 V and 18 V panel open-circuit voltages. The SOD-123 package fits compact solar charge controller boards. Verify that continuous panel current stays below 350 mA average and that surge currents during cloud-edge irradiance spikes do not exceed the 1 A IFSM rating.
推荐
Signal Demodulation and Clamping
In AM radio detectors and signal clamping circuits, the CH320BPT provides fast rectification of small RF or audio signals thanks to its Schottky junction and nanosecond-class reverse recovery. The low forward voltage threshold means even weak signals at tens of millivolts can be rectified, improving detector sensitivity. The 40 V reverse rating handles envelope peaks in moderate-level demodulators. Use it as the detector diode in place of germanium 1N34A for stable temperature performance.
推荐
Power OR-ing for Redundant Supplies
In redundant supply architectures, the CH320BPT provides diode-OR isolation between two low-voltage sources such as a wall adapter and a USB input. With 0.6 V forward drop and 350 mA rating, it can carry typical IoT node and small appliance currents while blocking reverse current from one source into the other. The 40 V reverse rating handles transient events during source hot-swap. For higher-current OR-ing, select a MOSFET-based ideal diode or a higher-rated Schottky.
推荐
Portable and Wearable Device Rails
In battery-powered wearables, hearables, and IoT sensor nodes, the CH320BPT serves as a small rectifier or reverse-polarity blocker where PCB real estate is at a premium. The SOD-123 footprint occupies less than 10 mm² and the 350 mA rating matches the typical draw of low-power microcontrollers and BLE SoCs. At 200 mA load the 0.6 V forward drop keeps conduction loss under 120 mW, preserving battery runtime. The wide -55 °C to +125 °C junction temperature range supports outdoor and industrial wearables.
推荐
推荐产品汇总
工程参考数据： CH320BPT ——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 | CH320BPT-B | B5819W | BAT41ZFILM | PMEG3020EH | VSKY0540S40S |
|---|---|---|---|---|---|---|
| Package | SOD-123 | SOD-123 (same) | SOD-123 (same) | SOD-123 (same) | SOD-123 (same) | SOD-123 (same) |
| Brand | Chenmko Enterprise | Chenmko Enterprise | Diodes Incorporated | STMicroelectronics | NXP Semiconductors | Vishay Intertechnology |
| VRRM (max) | 40 V | 40 V | 40 V | 100 V | 30 V | 40 V |
| Operating Temperature | -55 to +125 °C | -55 to +125 °C | -65 to +125 °C | -40 to +150 °C | -55 to +150 °C | -40 to +150 °C |
| Source | Verified Web Data | llm_knowledge | web_data | web_data | web_data | web_data |
关键差异点
- Higher current headroom drop-in alternative （对比 B5819W)
- Higher blocking voltage drop-in alternative （对比 BAT41ZFILM)
- Cross-brand sourcing flexibility （对比 Chenmko CH320BPT)
设计说明
At IF = 350 mA and VF = 0.6 V, the CH320BPT dissipates approximately 210 mW of conduction loss. With SOD-123 mounted on the standard JEDEC EIA/JESD51 reference board, theta_JA is approximately 340 °C/W, producing a junction temperature rise of roughly 71 °C above ambient - leaving comfortable margin below the +125 °C TJ limit. To improve thermals, expand the cathode copper pad to at least 100 mm² of 1 oz copper, which can reduce theta_JA by 30 to 50% and improve surge handling.
SOD-123 land pads should follow the IPC-7351 nominal footprint with approximately 1.0 mm pad width and 0.9 mm pad length, with the cathode pad slightly larger to act as a thermal spreader. Keep the trace from cathode to the next component short to minimize loop inductance and improve high-frequency rectification efficiency. Use a solder paste stencil with 0.1 to 0.12 mm thickness for reliable reflow without tombstoning.
Do not exceed the 40 V VRRM rating, including transient spikes from inductive loads - always add a snubber or TVS across inductive sources. Do not exceed the 1 A IFSM surge rating; verify that capacitive-load inrush currents are within limits using I = C·dV/dt estimates. Do not assume the marking code BA6 is the part number - the full MPN CH320BPT must be confirmed on the reel label and shipping documentation. Do not reverse polarity on the PCB silkscreen; the cathode band must match the schematic.
合规信息
RoHS and lead-free status confirmed via Chenmko product listings. REACH compliance inferred from distributor listings. AEC-Q100 not applicable to standard commercial-grade Schottky rectifiers. Halogen-free and conflict-minerals status not explicitly stated in the verified web data - set to unknown.
