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Texas Instruments ESDS452DBZRQ1
- Part No.:
- ESDS452DBZRQ1
- Manufacturer:
- Texas Instruments
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ESDS452DBZRQ1.pdf
- Description:
- AUTOMOTIVE 5.5V TWO-CHANNEL SURG
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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Product details
Overview
ESDS452DBZRQ1 from Texas Instruments is a bidirectional transient voltage suppression (TVS) diode designed for I/O line protection in industrial systems. It provides ±30kV IEC 61000-4-2 ESD protection, 18A 8/20μs surge capability per IEC 61000-4-5, 5.5V working voltage, 3pF typical line capacitance, and 1nA typical leakage current - enabling robust signal integrity in factory automation and energy storage interfaces.
For engineers reviewing the ESDS452DBZRQ1 datasheet, ESDS452DBZRQ1 pinout, ESDS452DBZRQ1 application, or ESDS452DBZRQ1 equivalent, this page delivers verified electrical specs, SOT-23 (DBZ) package details, clamping behavior under 1A–15A surges, thermal resistance metrics (RθJA = 309.5°C/W), and real-world implementation guidance for high-reliability industrial ESD/surge co-protection.
Technical Context
The ESDS452DBZRQ1 implements a symmetric bidirectional TVS structure with matched positive/negative breakdown at 7–9V (±1mA), enabling full-swing signal line protection without polarity constraints. Its ultra-low 3pF capacitance and 0.29Ω dynamic resistance ensure minimal signal distortion while maintaining sub-12V clamping at 15A surge current.
Designed for placement directly at connectors or IC inputs, it operates across –40°C to +125°C and leverages the SOT-23 (DBZ) package's 2.92mm × 2.37mm footprint and leaded construction for AOI-compatible assembly. The device meets automotive-grade AEC-Q100 requirements as the Q1 variant, though ESDS452DBZRQ1 itself is the qualified automotive version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | ±5.5 V - defines maximum continuous DC or peak AC signal voltage before conduction begins; ensures compatibility with 5V logic and sensor interfaces. |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - exceeds Level 4 immunity standard, protecting against human-body ESD events in harsh industrial environments. |
| Surge Current (IEC 61000-4-5) | 18 A (8/20 μs) - sustains high-energy transients from lightning-induced coupling or inductive switching without failure. |
| Clamping Voltage (VCLAMP) | 7.5 V @ 1 A / 11.5 V @ 15 A - limits downstream IC stress during fast transients; low differential clamping enables safe interface with 3.3V/5V MCUs. |
| Line Capacitance (CLINE) | 3 pF (typical at 1 MHz) - preserves signal rise time and bandwidth on high-speed lines such as RS-485, CAN, or analog sensor outputs. |
| Leakage Current (ILEAK) | 1 nA (typical at ±5.5 V) - avoids loading of high-impedance sensor nodes or battery-powered circuits over temperature. |
| Dynamic Resistance (RDYN) | 0.29 Ω - minimizes voltage overshoot during surge onset by reducing IR drop across the diode during conduction. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin, leaded, 2.92 mm × 2.37 mm footprint, 1.12 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IO) | I/O terminal | Bidirectional protected node - connects to signal line requiring ESD/surge suppression; symmetrical with Pin 2. |
| 2 (IO) | I/O terminal | Bidirectional protected node - mirrors Pin 1; enables dual-line protection (e.g., differential pair) using single device. |
| 3 (GND) | Ground reference | Low-inductance return path for transient current; must be connected to clean system ground plane near protected interface. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity | Supports AC-coupled or bipolar signal lines (e.g., RS-485, CAN, analog sensors) without external biasing or polarity selection. |
| 2-channel integration | Single DBZ package protects two independent I/O paths - reduces BOM count and PCB area vs. discrete diodes per line. |
| Ultra-low capacitance | 3 pF typical enables use on data lines up to 100 Mbps without signal integrity degradation or timing skew. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C) ensures reliability in engine control, battery management, and charging infrastructure. |
| AOI-compatible leads | Leaded SOT-23 allows automated optical inspection - improves manufacturing yield and traceability in high-volume industrial production. |
Applications
| Factory Automation Interface | Building Management System Sensor Hub |
|---|---|
|
Use Scenario: Protecting RS-485 communication lines between PLCs and remote I/O modules exposed to motor drive noise and grounding differences. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed at connector entry point to shunt ESD and surge energy to ground before reaching transceiver IC. Use Value: Prevents lockup or damage to isolated RS-485 transceivers during field maintenance or cable hot-plug events, maintaining uptime in 24/7 operation. |
Use Scenario: Shielding analog temperature/humidity sensor inputs in HVAC controllers from ESD during technician handling and HVAC actuator switching transients. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5V or 4–20mA sensor inputs to clamp fast transients without distorting slow-varying signals. Use Value: Maintains measurement accuracy and eliminates false alarms caused by transient-induced ADC offset shifts or microcontroller resets. |
| Grid-Tied Energy Storage Monitor | Battery Management System (BMS) Cell Monitoring |
|
Use Scenario: Safeguarding CAN FD communication lines between inverters and energy storage controllers in solar/wind installations subject to lightning-induced surges. IC Role / Device Role / Timing Role: Dual-channel TVS on CAN_H/CAN_L differential pair to suppress common-mode surges while preserving signal symmetry. Use Value: Ensures uninterrupted grid synchronization commands and state-of-charge reporting during thunderstorms or utility fault events. |
Use Scenario: Protecting voltage sense lines connecting BMS monitor ICs to individual Li-ion cells against ESD during module assembly and service. IC Role / Device Role / Timing Role: Low-leakage (1nA) TVS on high-impedance cell voltage inputs to avoid measurement error while blocking ±30kV discharge paths. Use Value: Guarantees <±1mV cell voltage accuracy critical for balancing algorithms and prevents false overvoltage trips during field servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-Q | Unidirectional, 5.0V VRWM, 400W peak power, SMA package (larger, surface-mount only) | Requires separate devices per polarity; unsuitable for AC/differential lines without redesign | Select only when unidirectional protection suffices and board space permits larger SMA footprint. |
| TPD2E001DRYR | 2-channel, 5.5V VRWM, 3pF, but rated only to ±8kV IEC 61000-4-2 (not ±30kV) | Limited to consumer-grade ESD protection; fails to meet industrial surge immunity requirements | Use only in cost-sensitive non-industrial applications where 18A surge rating and ±30kV ESD are not required. |
Compared with SMAJ5.0A-Q and TPD2E001DRYR, the ESDS452DBZRQ1 uniquely combines automotive-grade bidirectionality, ±30kV ESD, 18A surge, and SOT-23 size - making it the sole option for space-constrained, high-immunity industrial I/O protection without layout or component-count penalties.
Availability
ESDS452DBZRQ1 is available at Aetrix Electronics and suitable for factory automation interfaces, building management sensor hubs, and grid-tied energy storage monitors requiring stable component supply across extended product lifecycles.
Supply support for ESDS452DBZRQ1 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 for industrial, automotive, and personal electronics markets.
The ESDS452DBZRQ1 belongs to TI's automotive-qualified ESD protection portfolio, engineered specifically for high-reliability signal line hardening in battery management, grid infrastructure, and industrial control systems.
FAQ
What is the primary protection function of the ESDS452DBZRQ1?
The ESDS452DBZRQ1 functions as a bidirectional transient voltage suppressor that clamps ESD and surge events on signal or power lines. It conducts only during overvoltage transients - holding the protected line at ≤11.5V during 15A 8/20μs surges - while remaining high-impedance (<1nA leakage) during normal operation. This dual-mode behavior makes ESDS452DBZRQ1 ideal for safeguarding sensitive inputs in industrial interfaces without affecting baseline performance.
Does the ESDS452DBZRQ1 meet automotive qualification standards?
Yes, the ESDS452DBZRQ1 is AEC-Q100 qualified (Grade 1, –40°C to +125°C), with full test documentation including HTOL, TC, and ESD stress validation. Its DBZ package, NIPDAU lead finish, and MSL Level-1 rating support reflow soldering in automotive production lines. Unlike standard ESDS452 variants, the "Q1" suffix confirms formal automotive qualification - essential for use in battery management systems and vehicle charging infrastructure.
How does the ESDS452DBZRQ1 differ from unidirectional TVS diodes like SMAJ5.0A?
The ESDS452DBZRQ1 uses a symmetric bidirectional structure, allowing protection of AC-coupled or differential lines (e.g., RS-485, CAN) with a single device. Unidirectional diodes like SMAJ5.0A require two units per line or external biasing to handle negative transients - increasing cost, board area, and complexity. ESDS452DBZRQ1's 3pF capacitance and 0.29Ω RDYN also provide superior high-speed signal fidelity compared to SMAJ5.0A's ~10pF and higher dynamic impedance.
Can the ESDS452DBZRQ1 protect both power and signal lines?
ESDS452DBZRQ1 is optimized for signal line protection (e.g., RS-485, CAN, analog sensors) due to its 5.5V VRWM and low clamping voltage. While it can suppress transients on low-current power rails (e.g., 5V bias lines), it is not rated for high-energy power rail surges. For main power input protection, dedicated high-power TVS arrays or MOVs are recommended - but ESDS452DBZRQ1 remains effective for secondary power domains feeding sensitive analog or digital ICs.
What layout practices maximize ESDS452DBZRQ1 effectiveness?
To maximize ESDS452DBZRQ1 performance, place it within 2 mm of the protected connector with short, direct traces to the I/O line and ground. Use a solid ground plane beneath the device, minimize loop area between Pins 1/2 and Pin 3, and avoid routing other signals under the DBZ pad. TI's recommended land pattern (DBZ0003A) and 0.125mm stencil aperture ensure reliable solder joints - critical for maintaining low-inductance transient paths in ESDS452DBZRQ1 applications.
ESDS452DBZRQ1 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):
- 5.5V (Max)
- Voltage - Breakdown (Min):
- 7V
- Voltage - Clamping (Max) @ Ipp:
- 14V
- Current - Peak Pulse (10/1000µs):
- 18A (8/20µs)
- Power - Peak Pulse:
- 172W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ESDS452DBZRQ1 FAQ
1.How can I place an order for ESDS452DBZRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDS452DBZRQ1 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 ESDS452DBZRQ1 reliable?
The price and inventory of ESDS452DBZRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDS452DBZRQ1 is usually 5 days.
3.What payment methods are accepted for ESDS452DBZRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDS452DBZRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDS452DBZRQ1?
ESDS452DBZRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDS452DBZRQ1 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 ESDS452DBZRQ1?
For technical support, including ESDS452DBZRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDS452DBZRQ1 requirements.
6.How does Aetrix verify that ESDS452DBZRQ1 is sourced from the original manufacturer or authorized distributors?
All ESDS452DBZRQ1 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 ESDS452DBZRQ1 meets industry standards.
7.What is the process for return or replacement of ESDS452DBZRQ1?
All ESDS452DBZRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ESDS452DBZRQ1, 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 ESDS452DBZRQ1 part is unused and in its original packaging.
Return procedure for ESDS452DBZRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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