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Texas Instruments ESD652DBZR
- Part No.:
- ESD652DBZR
- Manufacturer:
- Texas Instruments
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ESD652DBZR.pdf
- Description:
- 18V TWO-CHANNEL BIDIRECTIONAL ES
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ESD652DBZR from Texas Instruments is a bidirectional transient voltage suppression (TVS) diode designed for I/O line ESD and surge protection in industrial communication interfaces. It features ±30kV IEC 61000-4-2 contact/air discharge rating, 5.5A 8/20μs surge current capability, 4pF typical line capacitance, 18V working voltage, and low 22–32V clamping voltage at 1–5.5A. It protects two signal lines with a single SOT-23 package in battery management systems and factory automation interfaces.
For engineers reviewing the ESD652DBZR datasheet, ESD652DBZR pinout, ESD652DBZR application, or ESD652DBZR equivalent, key selection criteria include bidirectional clamping performance under ±30kV ESD stress, low 4pF capacitance for high-speed signal integrity, thermal robustness up to 125°C ambient, and compatibility with automated optical inspection (AOI) due to its leaded SOT-23 (DBZ) footprint.
Technical Context
The ESD652DBZR implements a silicon avalanche diode architecture optimized for fast response to sub-nanosecond ESD transients and sustained 8/20μs surge events. Its symmetrical bidirectional structure enables protection of AC-coupled or differential signal pairs without polarity constraints.
Clamping behavior is defined by dynamic resistance (0.32Ω) and snapback characteristics, delivering VCLAMP = 22–32V across ±1A to ±5.5A surge currents. The device operates within –40°C to +125°C ambient and maintains <50nA leakage at ±18V reverse bias, ensuring minimal impact on signal DC biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating (IEC 61000-4-2) | ±30kV contact & air discharge - meets highest industrial immunity class without external shielding |
| Surge Rating (IEC 61000-4-5) | 5.5A (8/20μs) - handles lightning-induced surges in grid infrastructure and HVAC control lines |
| Working Voltage (VRWM) | ±18V - supports 12V/24V industrial bus systems including CAN FD, RS-485, and analog sensor inputs |
| Line Capacitance (CLINE) | 4pF typical at 1MHz - preserves signal integrity up to ~200Mbps in USB 2.0 or LVDS applications |
| Clamping Voltage (VCLAMP) | 22–32V at ±1A–±5.5A - limits downstream IC stress below 3.3V/5V logic rail damage thresholds |
| Leakage Current (ILEAK) | ≤50nA at ±18V - avoids loading of high-impedance sensor or reference circuits |
| Dynamic Resistance (RDYN) | 0.32Ω - ensures low voltage overshoot during fast transient conduction |
Pinout & Package
ESD652DBZR is housed in a leaded 3-pin SOT-23 (DBZ) package measuring 2.92mm × 2.37mm with maximum height of 1.12mm, compatible with standard AOI and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IO) | I/O terminal | Protected signal line input/output - connects to upstream data line (e.g., RS-485 A/B or CAN H/L) |
| Pin 2 (IO) | I/O terminal | Second protected signal line - enables dual-line protection (e.g., differential pair) with single device |
| Pin 3 (GND) | Ground reference | Low-inductance path to system ground plane - critical for effective transient energy shunting |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating signal lines without polarity concerns - essential for RS-485, CAN, and analog sensor interfaces |
| 4pF typical capacitance | Minimizes signal distortion and timing skew on high-speed lines - validated for use with 100Mbps+ industrial Ethernet PHYs |
| 22–32V clamping range | Keeps protected ICs within safe operating area during ±5.5A surges - prevents latch-up or gate oxide rupture in 3.3V/5V microcontrollers |
| SOT-23 (DBZ) package | Supports automated optical inspection and high-yield SMT assembly - eliminates need for custom stencil or placement calibration |
| –40°C to +125°C operation | Validated for deployment in uncontrolled environments including outdoor grid substations and HVAC duct-mounted controllers |
Applications
| Factory Automation I/O Protection | Building Automation Sensors |
|---|---|
Use Scenario: Protecting digital input modules receiving 24VDC discrete signals from PLCs in manufacturing cells. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between field wiring and optocoupler input stage. Use Value: Prevents false triggering and optocoupler degradation caused by ESD from operator touch or relay coil flyback. |
Use Scenario: Shielding temperature/humidity sensor analog outputs (0–10V or 4–20mA) in HVAC control panels exposed to maintenance personnel handling. IC Role / Device Role / Timing Role: Low-capacitance TVS diode connected across sensor output and ground before ADC input. Use Value: Maintains measurement accuracy by limiting ESD-induced offset drift while adding <0.1% gain error at full scale. |
| Grid Infrastructure Communication | Energy Storage System BMS |
Use Scenario: Securing RS-485 communication lines between smart meters and distribution automation controllers in outdoor substations. IC Role / Device Role / Timing Role: Bidirectional ESD clamp on differential A/B lines, placed immediately after connector. Use Value: Survives repeated ±30kV contact discharges during field technician servicing without parameter shift or failure. |
Use Scenario: Protecting isolated SPI or UART lines between battery cell monitor ICs and main BMS controller in lithium-ion packs. IC Role / Device Role / Timing Role: Dual-channel TVS on serial interface lines to prevent latch-up in isolated digital isolators. Use Value: Ensures uninterrupted cell voltage reporting during ESD events - avoids false fault flags or safety shutdowns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Unidirectional, 18V VRWM, 100pF capacitance, 27.7V VCLAMP @ 5.5A | Requires separate devices per signal polarity; unsuitable for AC-coupled or differential lines | Select only when protecting DC-biased single-ended lines where polarity is fixed and capacitance >4pF is acceptable |
| TPD2E001DRSR | Bidirectional, 5V VRWM, 12pF capacitance, 12V VCLAMP @ 1A | Limited to low-voltage interfaces (USB, I²C); insufficient for 18V industrial bus operation | Prefer for consumer-grade 3.3V/5V interfaces; not rated for ±30kV ESD or 5.5A surge in industrial settings |
Compared with SMAJ18A and TPD2E001DRSR, the ESD652DBZR uniquely combines bidirectional ±18V operation, 4pF capacitance, and ±30kV/5.5A ratings - making it the only option qualified for dual-line protection in 24V industrial networks without compromising speed or reliability.
Availability
ESD652DBZR is available at Aetrix Electronics and suitable for factory automation I/O modules, building automation sensor interfaces, and grid infrastructure communication nodes requiring stable component supply across extended product lifecycles.
Supply support for ESD652DBZR 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 specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in industrial and automotive electronics.
The ESD652DBZR belongs to TI's industrial-grade ESD protection portfolio, engineered specifically for robustness in harsh electromagnetic environments - targeting battery management systems, programmable logic controllers, and smart grid equipment.
FAQ
What is the maximum operating temperature for ESD652DBZR?
The ESD652DBZR is rated for continuous operation from –40°C to +125°C ambient temperature. Its thermal resistance (RθJA = 249.2°C/W) and junction-to-board metric (RθJB = 83.1°C/W) ensure reliable performance in enclosed industrial enclosures without forced airflow, provided PCB copper area meets recommended layout guidelines in the datasheet.
Does ESD652DBZR support bidirectional signal lines like RS-485 or CAN?
Yes, ESD652DBZR is explicitly designed for bidirectional protection and supports differential interfaces including RS-485, CAN, and LIN. Its symmetrical clamping characteristic (VCLAMP = 22–32V in both polarities) ensures equal protection for positive and negative transients on either line - confirmed in TI's SLVSHP4 datasheet Figure 5-1 and Figure 5-2 waveforms.
How does the 4pF capacitance of ESD652DBZR affect high-speed signal integrity?
The 4pF typical line capacitance of ESD652DBZR introduces negligible loading on signals up to 200Mbps - verified via eye diagram testing in TI application notes. At 100MHz, capacitive reactance remains >400Ω, preserving rise/fall times and minimizing jitter in industrial Ethernet and USB 2.0 applications where ESD652DBZR is deployed.
Can ESD652DBZR replace older ESD protection diodes like PESD5V0S1BA in industrial designs?
No - ESD652DBZR is not a drop-in replacement for PESD5V0S1BA. While both are bidirectional, PESD5V0S1BA has 5V VRWM and 12pF capacitance, making it suitable only for 3.3V/5V logic. ESD652DBZR's ±18V rating and 4pF capacitance target higher-voltage industrial buses; substituting requires redesign of voltage margining and layout spacing.
Is ESD652DBZR compliant with RoHS and REACH requirements?
Yes, ESD652DBZR is RoHS-compliant (lead finish: NiPdAu) and REACH-conformant, as documented in TI's PACKAGE OPTION ADDENDUM dated 9-Nov-2025. The device carries MSL Level-1 rating (260°C peak reflow, unlimited floor life) and is qualified for lead-free soldering per J-STD-020.
ESD652DBZR 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:
- 2
- Voltage - Reverse Standoff (Typ):
- 18V (Max)
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 32V
- Current - Peak Pulse (10/1000µs):
- 5.5A (8/20µs)
- Power - Peak Pulse:
- 176W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- 4pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ESD652DBZR FAQ
1.How can I place an order for ESD652DBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for ESD652DBZR 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 ESD652DBZR reliable?
The price and inventory of ESD652DBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESD652DBZR is usually 5 days.
3.What payment methods are accepted for ESD652DBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESD652DBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESD652DBZR?
ESD652DBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESD652DBZR 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 ESD652DBZR?
For technical support, including ESD652DBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESD652DBZR requirements.
6.How does Aetrix verify that ESD652DBZR is sourced from the original manufacturer or authorized distributors?
All ESD652DBZR 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 ESD652DBZR meets industry standards.
7.What is the process for return or replacement of ESD652DBZR?
All ESD652DBZR units undergo pre-shipment inspection (PSI). If there is an issue with ESD652DBZR, 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 ESD652DBZR part is unused and in its original packaging.
Return procedure for ESD652DBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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