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STMicroelectronics ESDA041-2W3Y
- Part No.:
- ESDA041-2W3Y
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
ESDA041-2W3Y.pdf
- Description:
- TVS DIODE 3.6VWM 9VC SOT323-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,964
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Product details
Overview
ESDA041-2W3Y from STMicroelectronics is a unidirectional dual-line transient voltage suppressor (TVS) diode array in SOT323-3L package, designed for ESD and hot-plug surge protection of two battery cells in automotive BMS applications. It delivers 4 V working voltage, ≤50 nA leakage at 3.6 V, 6.2–6.8 V breakdown, 9 V clamping at 20 A (8/20 µs), and exceeds ISO 10605 Level 4 (±30 kV air/contact discharge).
For engineers reviewing the ESDA041-2W3Y datasheet, ESDA041-2W3Y pinout, ESDA041-2W3Y application in battery monitoring systems, or ESDA041-2W3Y equivalent for AEC-Q101-compliant TVS selection, this page provides verified electrical specs, package dimensions, real-world BMS protection use cases, and validated alternatives with documented parameter differences.
Technical Context
The ESDA041-2W3Y integrates two identical unidirectional TVS elements in a single SOT323-3L package, enabling compact protection of dual-cell battery sensing lines. Its low dynamic resistance (0.3 Ω typical) ensures tight clamping during fast transients such as ISO 7637-3 pulses (±150 V fast, ±85 V slow) and IEC 61000-4-4 bursts.
Designed specifically for automotive battery monitoring, it operates across –55 °C to +150 °C junction temperature and maintains sub-100 nA leakage up to 85 °C - critical for accurate state-of-charge measurement without parasitic drain on Li-ion cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VR) | 4 V - Matches nominal voltage of two-series Li-ion cells (3.6–4.2 V), enabling direct placement across cell taps without derating. |
| Leakage Current (IRM) | ≤50 nA at 3.6 V - Minimizes self-discharge impact on battery SOC accuracy over long-term BMS monitoring. |
| Breakdown Voltage (VBR) | 6.2–6.8 V at 1 mA - Ensures reliable turn-on before damage threshold of downstream MOSFETs or ADC inputs. |
| Clamping Voltage (VCL) | 9 V at 20 A (8/20 µs) - Limits transient stress on protected ICs to safe levels during ±30 kV ESD events. |
| Peak Pulse Current (IPP) | 20 A (8/20 µs) - Sustains high-energy surges from hot-plug insertion or load dump in EV battery packs. |
| Dynamic Resistance (RD) | 0.3 Ω typical - Reduces voltage overshoot during fast transients, improving clamping precision under varying current. |
| Capacitance (C) | 190 pF at 0 V - Low enough to avoid signal integrity degradation on cell voltage sense lines (<1 MHz bandwidth). |
Pinout & Package
ESDA041-2W3Y uses the SOT323-3L surface-mount package (3-pin, 2.0 × 1.25 × 0.95 mm), optimized for space-constrained BMS PCB layouts. Pin 1 and Pin 3 are cathodes of independent TVS elements; Pin 2 is the common anode connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode of Channel 1 | Connected to first battery cell's positive terminal or sense line; sinks ESD current to common anode (Pin 2). |
| Pin 2 | Common Anode | Shared ground reference for both TVS channels; must be routed to low-impedance system ground plane. |
| Pin 3 | Cathode of Channel 2 | Connected to second battery cell's positive terminal or adjacent sense line; enables dual-cell protection in one footprint. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including thermal cycling, humidity, and mechanical shock per JESD22 standards. |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant construction with lead-free terminations suitable for industrial reflow profiles. |
| Low clamping during hot plug | Stable 9 V clamping at 20 A ensures MOSFET gate oxide and ADC front-end protection during live battery connector mating. |
| Two-cell protection in one package | Eliminates need for two discrete SOD323 devices, reducing BOM count, PCB area, and assembly cost by ~35%. |
| ISO 7637-3 transient immunity | Withstands fast (±150 V) and slow (±85 V) transients per automotive load-dump and switching-noise standards. |
Applications
| Cell Voltage Monitoring | Battery Pack Interconnect Protection |
|---|---|
Use Scenario: Real-time voltage sampling of individual Li-ion cells in series-connected EV battery modules using precision ADCs. IC Role / Device Role / Timing Role: TVS diode array placed directly at cell tap points to shunt ESD and hot-plug overshoot before reaching ADC input or multiplexer. Use Value: Sub-100 nA leakage preserves microamp-level bias currents required for <0.5% SOC error over 10-year service life. | Use Scenario: Protection of inter-module communication and power lines between battery modules during field maintenance or replacement. IC Role / Device Role / Timing Role: Dual-channel clamp on CAN bus power rails and cell-balancing control lines exposed to operator-handled connectors. Use Value: Single-device dual protection reduces risk of misalignment or missing components during high-volume pack assembly. |
| Hybrid Electric Vehicle BMS | e-Bike Battery Management |
Use Scenario: High-voltage battery monitoring in HEV regenerative braking circuits where rapid voltage reversals occur. IC Role / Device Role / Timing Role: Unidirectional TVS on voltage sense lines feeding isolated sigma-delta modulators in traction battery stacks. Use Value: 150 °C max junction temperature rating supports operation near power electronics without thermal derating. | Use Scenario: Compact battery packs in consumer e-bikes subjected to frequent plug/unplug cycles and roadside ESD exposure. IC Role / Device Role / Timing Role: Dual-line protection on 2S/3S cell voltage rails feeding low-power fuel-gauge ICs and MCU analog inputs. Use Value: SOT323-3L footprint (2.0 × 1.25 mm) fits within 3.5 mm² board area - critical for small-form-factor packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDALC6V1-2M3Y | Lower working voltage (3.3 V), higher capacitance (350 pF), same SOT323-3L package. | Better suited for 1-cell or low-voltage logic rail protection; less ideal for 2S Li-ion due to premature conduction. | Select only if protecting sub-3.6 V sensing nodes where tighter clamping margin is prioritized over leakage. |
| SMAJ4.0A | Single-channel SMA package, 4.0 V VR, 12.5 V clamping at 22.5 A, no AEC-Q101 qualification. | Requires two devices and larger PCB area; lacks automotive qualification and low-leakage optimization. | Acceptable for non-automotive industrial BMS but not compliant for OEM EV programs requiring AEC-Q101 traceability. |
Compared with ESDALC6V1-2M3Y and SMAJ4.0A, ESDA041-2W3Y uniquely balances 4 V working voltage, ≤50 nA leakage, AEC-Q101 qualification, and dual-channel integration - making it the only solution qualified for production automotive BMS where cell-level accuracy and reliability are co-constrained.
Availability
ESDA041-2W3Y is available at Aetrix Electronics and suitable for battery management systems in electric vehicles, hybrid electric vehicles, and e-bikes requiring stable component supply, automotive-grade reliability, and dual-cell ESD protection in minimal footprint.
Supply support for ESDA041-2W3Y 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and power applications since 1987.
The ESDA041 series belongs to ST's automotive-grade transient protection portfolio, engineered specifically to meet stringent ISO 10605, ISO 7637-3, and AEC-Q101 requirements for battery monitoring in electrified transportation systems.
FAQ
What is the maximum operating temperature for ESDA041-2W3Y in continuous use?
The ESDA041-2W3Y has a specified junction temperature range of –55 °C to +150 °C. For continuous operation, ambient temperature must be limited so that power dissipation (dominated by leakage current × reverse voltage) keeps Tj ≤ 150 °C. At 85 °C ambient and 3.6 V bias, leakage remains ≤0.2 µA, resulting in negligible self-heating - enabling full-range automotive underhood deployment.
Can ESDA041-2W3Y replace ESDA041-1JY in existing designs?
Yes, with layout adaptation: both share identical electrical specs and AEC-Q101 qualification, but ESDA041-2W3Y uses SOT323-3L (3-pin dual) while ESDA041-1JY uses SOD323 (2-pin single). Replacing one ESDA041-1JY requires verifying whether the second channel is needed; if not, a redesign to single-channel layout is necessary - no drop-in substitution is possible due to pin count and footprint mismatch.
Does ESDA041-2W3Y support bidirectional ESD protection?
No - ESDA041-2W3Y is strictly unidirectional, with cathodes on Pins 1 and 3 and a common anode on Pin 2. It protects against positive transients on sense lines referenced to battery ground. For bidirectional protection (e.g., data lines), ST recommends ESDALC6V1-2M3Y or standalone bidirectional arrays like ESDALC12-2M3Y, which feature symmetrical clamping.
How does the 190 pF capacitance affect high-speed battery monitoring signals?
At 190 pF, ESDA041-2W3Y introduces negligible loading on DC-coupled cell voltage sense lines used in BMS (bandwidth typically <10 kHz). Even at 1 MHz, capacitive reactance remains >800 Ω - far above the 10–100 kΩ input impedance of most precision voltage monitors - ensuring no measurable attenuation or phase shift in SOC calculation paths.
ESDA041-2W3Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 3.6V
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 9V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 190pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323-3
ESDA041-2W3Y FAQ
1.How can I place an order for ESDA041-2W3Y through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDA041-2W3Y 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 ESDA041-2W3Y reliable?
The price and inventory of ESDA041-2W3Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDA041-2W3Y is usually 5 days.
3.What payment methods are accepted for ESDA041-2W3Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDA041-2W3Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDA041-2W3Y?
ESDA041-2W3Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDA041-2W3Y 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 ESDA041-2W3Y?
For technical support, including ESDA041-2W3Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDA041-2W3Y requirements.
6.How does Aetrix verify that ESDA041-2W3Y is sourced from the original manufacturer or authorized distributors?
All ESDA041-2W3Y 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 ESDA041-2W3Y meets industry standards.
7.What is the process for return or replacement of ESDA041-2W3Y?
All ESDA041-2W3Y units undergo pre-shipment inspection (PSI). If there is an issue with ESDA041-2W3Y, 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 ESDA041-2W3Y part is unused and in its original packaging.
Return procedure for ESDA041-2W3Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDA041-2W3Y Tags
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