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Texas Instruments TSM24CADBZRQ1
- Part No.:
- TSM24CADBZRQ1
- Manufacturer:
- Texas Instruments
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TSM24CADBZRQ1.pdf
- Description:
- AUTOMOTIVE, 24-V, 30-A, BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,688
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Product details
Overview
TSM24CADBZRQ1 from Texas Instruments is a bidirectional automotive-grade TVS diode in SOT-23 (DBZ) package, designed for surge and ESD protection of CAN/LIN signal lines in 12-V EV charging systems. It delivers ±24 V working voltage, 40 V clamping at 24 A (8/20 µs), 12 pF typical line capacitance, and ±30-kV IEC 61000-4-2 ESD rating - enabling robust EMC compliance in CHAdeMO/CCS/GB/T communication interfaces.
For engineers reviewing the TSM24CADBZRQ1 datasheet, TSM24CADBZRQ1 pinout, TSM24CADBZRQ1 application, or TSM24CADBZRQ1 equivalent, key selection criteria include low-capacitance protection for high-speed automotive networks, IEC 61000-4-5 (1 kV/42 Ω) surge survivability, bidirectional polarity support for miswiring resilience, and AEC-Q101 qualification for powertrain environments.
Technical Context
The TSM24CADBZRQ1 operates as a snapback-type bidirectional TVS diode with symmetrical breakdown at ±25.5 V (10 mA), triggering into low-dynamic-resistance conduction to clamp transients. Its design targets fast response to sub-microsecond ESD events and sustained 8/20 µs surges up to 30 A without degradation.
It integrates dual-level protection: primary surge shunting per IEC 61000-4-5 and secondary ESD suppression per IEC 61000-4-2 and ISO 10605. The device connects across signal line and ground (pins 1–2 to GND), with pin 3 unconnected - requiring no biasing or control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | ±24 V - matches nominal 12-V system rail with ±100% swing tolerance for CANH/CANL differential signaling. |
| Clamping Voltage (VCLAMP) | 40 V at 24 A (8/20 µs) - limits stress on downstream CAN transceivers during lightning-induced surges. |
| Peak Pulse Current (IPPM) | 30 A (8/20 µs) - sustains IEC 61000-4-5 Level 4 surge immunity (1 kV open-circuit, 42 Ω source impedance). |
| Line Capacitance (CLINE) | 12 pF at 1 MHz - preserves signal integrity on >1 Mbps CAN FD buses without edge distortion or timing jitter. |
| Leakage Current (ILEAK) | 75 nA max at ±24 V - avoids loading of high-impedance LIN or sensor input nodes in sleep-mode vehicle networks. |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - exceeds AEC-Q101 requirements and eliminates need for external ESD staging. |
| Operating Temperature | –55 °C to +150 °C - qualified for under-hood and battery-pack locations in HEV/EV powertrain modules. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 2.37 mm footprint, 1.12 mm max height, leaded 3-pin configuration compatible with AOI and standard reflow profiles (MSL Level-1, 260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 and 2 | I/O (bidirectional) | Surge/ESD protected signal terminal - connect one pin to protected line (e.g., CANH), the other to GND; symmetric operation enables polarity-agnostic placement. |
| 3 | No Connect (NC) | Must remain floating - internal connection absent; soldering or routing to this pin degrades clamping performance and thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge clamping | Enables single-device protection of differential bus lines (CANH/CANL) without polarity-sensitive layout or additional components. |
| 12 pF line capacitance | Minimizes signal rise-time degradation on 500 kbps–2 Mbps automotive networks, preserving bit error rate in CCS/CHAdeMO handshaking. |
| ±30-kV IEC 61000-4-2 ESD | Eliminates need for cascaded ESD diodes in EV charging port interfaces, reducing BOM count and PCB area by ≥30% vs. discrete solutions. |
| 30 A IEC 61000-4-5 surge rating | Meets ISO 16750-2 pulse 5b (load dump) and IEC 61000-4-5 Ed. 4 requirements for DC fast-charging infrastructure connectivity. |
| AEC-Q101 qualified | Validated for automotive powertrain use with HBM ±2.5 kV / CDM ±1 kV, ensuring reliability across 15-year vehicle lifecycles. |
Applications
| EV Battery Charging CAN Bus | HEV On-Board Charger Control |
|---|---|
Use Scenario: Protecting CANH/CANL lines between EVSE and vehicle during CHAdeMO/CCS handshake under outdoor lightning-prone conditions. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector interface, clamping surges before they reach isolated CAN transceiver. Use Value: 40 V clamping ensures downstream CAN PHY remains within absolute maximum ratings (typically ±40 V), preventing latch-up or permanent damage during 1-kV/42-Ω coupled surges. |
Use Scenario: Shielding LIN or PWM control signals between OBC microcontroller and DC-DC converter in hybrid powertrain modules. IC Role / Device Role / Timing Role: Low-leakage (75 nA max) TVS diode guarding digital inputs against ESD during service port access or assembly handling. Use Value: 12 pF capacitance avoids signal delay skew on 20 kHz–200 kHz control loops, maintaining closed-loop stability in OBC voltage regulation. |
| Automotive LIN Network Node | 24-V Digital I/O Protection |
Use Scenario: Securing LIN slave nodes (e.g., door module sensors) exposed to harness-induced transients in 12-V battery systems with 24-V jump-start capability. IC Role / Device Role / Timing Role: Standalone bidirectional protector on LIN bus line, mounted adjacent to connector to minimize inductance in surge path. Use Value: ±24 V VRWM accommodates 24-V jump-start transients while 40 V clamping prevents LIN transceiver overvoltage beyond its 36 V abs max rating. |
Use Scenario: Safeguarding 24-V digital inputs (e.g., ignition sense, brake switch) in ADAS domain controllers subjected to load dump pulses. IC Role / Device Role / Timing Role: Primary surge diverter on 24-V supply rail input, shunting 30 A peak current away from LDO regulators and MCU GPIOs. Use Value: 1200 W peak pulse power rating handles ISO 16750-2 pulse 5a (12 V system, 100 V/10 ms) without thermal runaway or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-Q1 | Unidirectional, SMA package (4.5 × 2.7 mm), 500 W PPPM, 27.8 V VBR, 38.9 V VCLAMP @ 22.5 A | Larger footprint, higher clamping, unsuitable for bidirectional buses like CAN without dual-device implementation | Select only for unidirectional 24-V power rail protection where board space allows SMA and polarity is fixed. |
| TPD2E001DRYR | 2-channel unidirectional, X2SON-6, 12 pF, ±8-kV ESD, 12 V VRWM, not surge-rated | Designed for board-level ESD only; lacks IEC 61000-4-5 surge capability and automotive temperature range | Use only for non-safety-critical consumer-grade data lines - not approved for AEC-Q101 or EV charging infrastructure. |
Compared with SMAJ24A-Q1 and TPD2E001DRYR, the TSM24CADBZRQ1 uniquely combines bidirectional operation, 30-A surge rating, AEC-Q101 qualification, and SOT-23 size - making it the only drop-in solution for space-constrained, high-reliability CAN/LIN protection in automotive electrification systems.
Availability
TSM24CADBZRQ1 is available at Aetrix Electronics and suitable for EV battery charging communication (CHAdeMO/CCS/GB/T), HEV on-board charger control, and automotive LIN network node protection requiring stable component supply across multi-year production programs.
Supply support for TSM24CADBZRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in automotive, industrial, and power management technologies.
The TSM24CADBZRQ1 belongs to TI's AEC-Q101-qualified surge protection portfolio, engineered specifically for EMC-hardened signal-line protection in electric vehicle powertrain and charging subsystems.
FAQ
What is the primary circuit role of the TSM24CADBZRQ1 in automotive networks?
The TSM24CADBZRQ1 serves as a bidirectional transient voltage suppressor (TVS) that shunts high-energy surges and ESD events from signal lines (e.g., CANH/CANL, LIN) to ground. Its snapback behavior clamps transients to 40 V at 24 A while maintaining low leakage (<75 nA) and minimal capacitance (12 pF), ensuring signal integrity and IC safety without disrupting normal bus operation. This function is critical in the TSM24CADBZRQ1's deployment at EV charging port interfaces and powertrain control modules.
Does the TSM24CADBZRQ1 require external biasing or control signals to operate?
No, the TSM24CADBZRQ1 is a passive, self-triggering TVS diode requiring no external power, biasing, or control logic. It operates solely based on voltage threshold: when transient voltage exceeds ±25.5 V (breakdown), it enters low-impedance conduction mode to divert current to ground. Pin 3 is NC and must remain unconnected; pins 1 and 2 form the bidirectional I/O pair. This autonomy makes the TSM24CADBZRQ1 ideal for retrofitting into existing CAN/LIN layouts without redesign.
How does the TSM24CADBZRQ1 meet automotive EMC requirements for EV charging systems?
The TSM24CADBZRQ1 meets IEC 61000-4-5 Level 4 (1 kV open-circuit, 42 Ω source) and IEC 61000-4-2 ±30-kV ESD standards out-of-the-box, eliminating need for external filtering or staged protection. Its 30 A surge rating and 40 V clamping ensure downstream CAN transceivers survive lightning-induced coupling in CHAdeMO/CCS infrastructure. Combined with AEC-Q101 qualification and –55 °C to +150 °C operation, the TSM24CADBZRQ1 satisfies ISO 11452 and CISPR 25 requirements for EV charging communication subsystems.
Can the TSM24CADBZRQ1 be used on 24-V power rails, or is it limited to signal lines?
The TSM24CADBZRQ1 is rated for ±24 V working voltage and supports 30 A IEC 61000-4-5 surges, making it suitable for both 24-V digital I/O lines and low-current 24-V power rails (e.g., sensor supply, actuator enable). However, its 1200 W peak pulse power is optimized for short-duration transients-not continuous overvoltage. For sustained 24-V rail protection, pairing the TSM24CADBZRQ1 with upstream current limiting or using it alongside a dedicated power TVS (e.g., SMAJ24A-Q1) is recommended. Its role remains defined by the TSM24CADBZRQ1's core specification: transient suppression, not steady-state regulation.
What is the significance of the NC (pin 3) designation in the TSM24CADBZRQ1 pinout?
Pin 3 of the TSM24CADBZRQ1 is internally unconnected (NC) and must remain floating-no soldering, routing, or grounding is permitted. TI's datasheet explicitly states that connecting pin 3 degrades clamping performance and thermal reliability due to parasitic coupling and altered current paths during surge events. This NC requirement is verified in the DBZ package mechanical drawings and thermal characterization data. Maintaining pin 3 as a true no-connect is essential to achieving the published 40 V clamping and 30 A surge rating of the TSM24CADBZRQ1.
TSM24CADBZRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 25.5V
- Voltage - Clamping (Max) @ Ipp:
- 35V (Typ)
- Current - Peak Pulse (10/1000µs):
- 30A (8/20µs)
- Power - Peak Pulse:
- 1200W (1.2kW)
- Power Line Protection:
- No
- Applications:
- CAN, Telecom
- Capacitance @ Frequency:
- 14pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TSM24CADBZRQ1 FAQ
1.How can I place an order for TSM24CADBZRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM24CADBZRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TSM24CADBZRQ1 reliable?
The price and inventory of TSM24CADBZRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM24CADBZRQ1 is usually 5 days.
3.What payment methods are accepted for TSM24CADBZRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM24CADBZRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM24CADBZRQ1?
TSM24CADBZRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM24CADBZRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TSM24CADBZRQ1?
For technical support, including TSM24CADBZRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM24CADBZRQ1 requirements.
6.How does Aetrix verify that TSM24CADBZRQ1 is sourced from the original manufacturer or authorized distributors?
All TSM24CADBZRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSM24CADBZRQ1 meets industry standards.
7.What is the process for return or replacement of TSM24CADBZRQ1?
All TSM24CADBZRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TSM24CADBZRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TSM24CADBZRQ1 part is unused and in its original packaging.
Return procedure for TSM24CADBZRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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