ESD2CAN24DCKRQ1 - 24V Dual CAN Bus ESD Protection | TI
料号： ESD2CAN24DCKRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ESD2CAN24DCKRQ1 概述
An ESD protection diode (also called a TVS diode or transient voltage suppressor) is a discrete semiconductor protection device that clamps electrostatic discharge and cable-transient events to a safe level before they reach sensitive transceiver pins. Within the system hierarchy, it sits in the circuit-protection layer of a network interface, upstream of components such as CAN transceivers, microcontrollers, and automotive MCUs, forming part of the broader power and signal integrity chain defined by ISO 10605 and IEC 61000-4-2 test environments.
Key features include a low dynamic resistance that produces a low clamping voltage (37 V typical under surge), a back-to-back TVS structure supporting bidirectional signaling on both CAN_H and CAN_L, and AEC-Q100 automotive qualification with a -55C to +150C junction temperature range. Per the TI datasheet (ESD2CANxx24-Q1, Rev. D), the device dissipates contact ESD strikes beyond the maximum level specified in ISO 10605: +/-27 kV contact and +/-27 kV air-gap.
The architecture uses two bidirectional ESD structures with an integrated clamp circuit, giving a 3 pF typical / 5 pF maximum line capacitance that preserves the 5 Mbps CAN FD signal margin while the low clamping voltage protects downstream transceivers against transient events on the bus.
Typical applications include 12 V and 24 V automotive CAN and CAN FD bus protection, in-vehicle network gateways and body-control modules, and industrial CAN fieldbus nodes where robustness against coupled transients is required.
Design consideration: place the diode as close as possible to the connector, with a short, direct ground return; excessive trace inductance ahead of the diode degrades the effective clamping voltage during a fast ESD event.
This page adds value beyond the datasheet by synthesizing drop-in-alternative analysis, package comparison, and practical layout guidance from the TI E2E interface forum and distributor listings in one place.
直接替换替代料： ESD2CAN24DCKRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ESD2CAN24DCKRQ1 （相同外形与封装尺寸） ——差异在于 Application, Package, Product Type.
快速对比工具——选择替代料号进行并排对比：
该产品暂无直接替换替代料。
请求替代料ESD2CAN24DCKRQ1 规格参数
| Product Type | Bidirectional dual-channel ESD protection TVS diode |
| Application | CAN / CAN FD and in-vehicle network protection |
| Reverse Stand-off / Working Voltage | +/-24 V |
| Clamping Voltage (typ) | 37 V |
| Peak Pulse Current Ipp | 5.7 A (8/20 us) |
| ESD Protection (system level) | +/-30 kV |
| ESD per ISO 10605 | +/-27 kV contact, +/-27 kV air-gap |
| Line Capacitance | 3 pF typical, 5 pF maximum |
| Configuration | 2-channel bidirectional (back-to-back TVS) |
| Polarity | Bidirectional |
| Qualification | AEC-Q100 automotive qualified |
| 工作结温 | -55C to +150C |
| 封装 | SC-70 (SOT-323, DCK), 3 pins |
| 安装类型 | Surface Mount |
| Marking Convenience | Leaded package convenient for automatic optical inspection |
ESD2CAN24DCKRQ1 引脚配置
| 引脚 1 | CAN_H / I/O 1 — Channel 1 bidirectional I/O - connect to CAN_H bus line |
| 引脚 2 | GND — Ground reference (common cathode node) |
| 引脚 3 | CAN_L / I/O 2 — Channel 2 bidirectional I/O - connect to CAN_L bus line |
安全工作区
典型应用
ESD2CAN24DCKRQ1 适用于 6 应用s: 24V CAN Bus Protection, 12V Passenger Car In-Vehicle Networks, CAN FD Network Nodes, Industrial CAN Fieldbus Nodes, Automotive Gateway and Body Control Modules, In-Cabin Radar and Sensor Modules.
24V CAN Bus Protection
In 24 V truck, commercial-vehicle, and agricultural CAN networks, the ESD2CAN24DCKRQ1 protects the CAN_H and CAN_L lines with its dual-channel bidirectional topology matching the differential pair exactly. Its +/-24 V working voltage accommodates the higher bus swings of 24 V systems, while the low dynamic resistance holds clamping to 37 V typical, keeping transceiver bus-pin stress within limits. With 3 pF typical capacitance it preserves CAN FD signal margin at 5 Mbps. Placed directly at the connector with a short ground return, it withstands ISO 10605 +/-27 kV contact and air-gap strikes that connectors on externally exposed harnesses routinely encounter during assembly and service.
推荐
12V Passenger Car In-Vehicle Networks
For 12 V passenger-car body, chassis, and gateway modules, the ESD2CAN24DCKRQ1 provides headroom above the nominal 12 V bus while remaining clamped well below transceiver absolute maximum ratings during ISO 10605 ESD events. Its +/-30 kV system-level rating exceeds the powered and unpowered discharge levels demanded by OEM validation plans, and the AEC-Q100 qualification with -55C to +150C junction range matches under-hood and engine-bay temperature profiles. The 3-pin SC-70 package fits the dense routing near the vehicle connector where the differential pair enters the PCB, and the leaded SC-70 body supports automatic optical inspection in high-volume ECU assembly lines.
推荐
CAN FD Network Nodes
CAN FD raises the bit rate to 5 Mbps during the data phase, so bus capacitance budgets are tight; the ESD2CAN24DCKRQ1's 3 pF typical (5 pF maximum) line capacitance keeps edge degradation minimal even with two ESD diodes and a transceiver on the line. The back-to-back TVS clamp structure supports the bidirectional signaling of the differential pair without polarity concerns, and the 5.7 A (8/20 us) Ipp rating absorbs coupled transient energy from cable dumps and coupled switching noise. Its 37 V typical clamping voltage under surge stays compatible with 5 V CAN FD transceiver bus-pin absolute maximum ratings, protecting FD-capable nodes on mixed-speed networks.
推荐
Industrial CAN Fieldbus Nodes
Industrial CAN installations in factory automation and motor-control cabinets face cable-induced transients and hot-plug ESD whenever operators connect service tools. The ESD2CAN24DCKRQ1's 5.7 A Ipp surge rating and low 37 V typical clamp absorb these events before the transceiver, and its industrial-relevant -55C to +150C rating covers unconditioned electrical cabinets. Although automotive-qualified, AEC-Q100 parts are commonly used in industrial designs for their extended reliability screening. Its 3 pF capacitance is well within the CAN 1 Mbps classical-frame timing budget, and the tiny SC-70 footprint suits compact I/O modules where connector-edge board space is the most constrained routing region on the PCB.
推荐
Automotive Gateway and Body Control Modules
Gateways aggregate multiple CAN channels, so a single design may place a dozen ESD2CAN24DCKRQ1 devices across its connector bank. The SC-70's 2.0 mm x 1.25 mm body scale keeps the protection bank from dominating connector-side routing on multilayer ECU boards, and identical per-channel behavior simplifies compliance documentation because one part number covers every CAN port. The bidirectional +/-24 V rating tolerates inductive transients superimposed on the bus in addition to ESD, and the 150C maximum junction rating allows use near hot gateway mounting locations. TI notes the leaded package is convenient for automatic optical inspection, aiding zero-defect automotive manufacturing flows.
推荐
In-Cabin Radar and Sensor Modules
TI's E2E forum documents customers reviewing the ESD2CAN24DCKRQ1 for in-cabin RADAR products installed in vehicles, where a CAN interface connects the sensor to the vehicle network and must survive connector ESD during service. In this role the diode protects the transceiver bus pins while the module's sensitive power rails (5 V, 3.3 V, 1.8 V, 1.2 V, 1.0 V) are protected by separate lower-voltage ESD devices in the same SC-70 footprint family, allowing one land pattern to serve the entire protection scheme. The -55C to +150C range and AEC-Q100 qualification satisfy the automotive qualification plan for cabin-mounted electronics near heat sources.
推荐
推荐产品汇总
工程参考数据： ESD2CAN24DCKRQ1 ——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 | ESD2CAN24DBZRQ1 |
|---|---|---|
| Package | SC-70 (SOT-323, DCK), 3 pins | SOT-23 (DBZ), 3 pins - different footprint |
| Brand | Texas Instruments | Texas Instruments |
| Working Voltage | +/-24 V | +/-24 V |
| Line Capacitance | 3 pF typ / 5 pF max | 3 pF typ |
| System-level ESD | +/-30 kV | +/-30 kV |
| Temperature Range | -55C to +150C | -55C to +150C |
| Automotive Grade | Yes (AEC-Q100, Q1 suffix) | Yes (AEC-Q100, Q1 suffix) |
关键差异点
- Smaller footprint within the same electrical family （对比 ESD2CAN24DBZRQ1)
- Purpose-built CAN protection vs generic TVS （对比 Generic 24 V TVS array)
- Trade-off: capacitance maximum is higher than some competitors （对比 ST CAN protection parts (per TI E2E forum))
设计说明
Place the ESD2CAN24DCKRQ1 within a few millimeters of the CAN connector, with the ground pin connected to the chassis/ground plane through a short, low-inductance via or trace. During an ISO 10605 +/-27 kV strike, every nanohenry of series trace inductance ahead of the diode adds to the effective clamping voltage seen by the transceiver (V = L * di/dt), so a long stub can negate the low 37 V clamp advantage. Route CAN_H to pin 1 and CAN_L to pin 3 symmetrically to preserve differential balance.
The SC-70 (DCK) package allows routing the differential pair straight through pins 1 and 3 with the ground pad on the center line, avoiding via stubs. Keep a solid ground pour under the device. Because this is a leaded package intended for automatic optical inspection, orient the marking consistently across the connector bank in gateway designs with many channels to simplify AOI programming and reduce false-reject rates in production.
Do not substitute the SOT-23 (DBZ) variant onto an SC-70 land pattern - although electrically identical (+/-24 V, 3 pF, +/-30 kV), the footprints are not interchangeable. Also, note from TI's E2E forum that the family's maximum capacitance is 5 pF versus 3.5 pF for some competitor parts; in very large multi-node CAN FD networks the worst-case capacitance accumulation matters, so verify the 5 pF maximum against your network timing budget rather than designing to the 3 pF typical figure.
合规信息
AEC-Q100 automotive qualification is indicated by the Q1 suffix per the TI product page. RoHS/REACH/lead-free status was not stated in the provided data and should be confirmed on the TI product page.
