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STMicroelectronics ESDA051-1JY
- Part No.:
- ESDA051-1JY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
ESDA051-1JY.pdf
- Description:
- TVS DIODE 5VWM 12.8VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:61,663
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Product details
Overview
ESDA051-1JY from STMicroelectronics is a unidirectional single-channel TVS diode designed for automotive-grade ESD and EOS surge protection in battery monitoring systems and high-voltage vehicle electronics. It delivers 30 kV contact/air discharge immunity (IEC 61000-4-2, ISO 10605), clamps at ≤12.8 V under 20 A 8/20 µs pulse, exhibits ≤50 nA leakage at 3.6 V, and operates from –55 °C to +150 °C in SOD323 package.
For engineers reviewing the ESDA051-1JY datasheet, ESDA051-1JY pinout, ESDA051-1JY application, or ESDA051-1JY equivalent, key selection criteria include clamping voltage under transient current, leakage compatibility with precision BMS voltage sensing, AEC-Q101 qualification, and SOD323 footprint suitability for space-constrained automotive PCB layouts.
Technical Context
This device implements a silicon avalanche diode structure optimized for fast response (<1 ns) to ESD events and robust handling of ISO 7637-3 transient pulses (±150 V fast, ±85 V slow). Its unidirectional configuration protects only the positive rail relative to ground, requiring correct polarity placement in series with protected IC inputs.
Clamping behavior follows VCL(max) = VBR(max) + RD × IPP, where VBR(max) = 6.8 V and dynamic resistance RD = 0.3 Ω enable low-voltage clamping even at 20 A peak pulse current. The 190 pF capacitance at 0 V supports signal integrity in DC-biased lines like cell voltage sense traces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.2 V / 6.8 V - Ensures reliable turn-on above 5 V system rail while limiting overshoot during transients |
| VCL @ 20 A | 12.8 V - Clamps surges below IC absolute maximum ratings for microcontrollers and ADCs in BMS |
| IRM @ 3.6 V | 50 nA max - Prevents measurement error in high-impedance cell voltage sensing circuits |
| CJ @ 0 V | 190 pF - Low enough to avoid signal distortion on DC-coupled battery monitor inputs |
| ESD rating | ±30 kV air/contact (IEC 61000-4-2, ISO 10605) - Exceeds automotive level 4 immunity requirements |
| Operating temp | –55 °C to +150 °C - Supports placement near battery packs and power electronics in EV/HEV environments |
| Package | SOD323 - 1.8 mm × 1.45 mm footprint enables dense layout in compact BMS modules |
Pinout & Package
The ESDA051-1JY is housed in a surface-mount SOD323 package with two terminals: anode and cathode. Cathode is marked with a band; polarity must be observed for unidirectional protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side (protected line) | Connected to the signal or power line requiring ESD protection; referenced to system ground via cathode |
| Cathode | Ground reference terminal | Must be connected to low-impedance chassis or battery ground; determines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and battery-pack environments per stress test requirements |
| Low clamping voltage | 12.8 V at 20 A ensures protected ICs remain within safe operating area during EOS events |
| Ultra-low leakage | ≤50 nA at 3.6 V avoids bias current errors in precision 16-bit ADC-based cell voltage measurements |
| ECOPACK2 compliance | Meets RoHS and halogen-free requirements for global automotive supply chain traceability |
| ISO 7637-3 transient immunity | Withstands ±150 V fast pulses and ±85 V slow pulses without degradation in BMS front-end circuits |
Applications
| Battery Management System (BMS) Cell Monitoring | Automotive Infotainment Power Rail Protection |
|---|---|
Use Scenario: Protecting analog front-end inputs of 16-bit ADCs measuring individual Li-ion cell voltages in EV traction batteries. IC Role / Device Role / Timing Role: Unidirectional TVS placed in series with each cell sense line to clamp ESD/EOS before reaching precision amplifier inputs. Use Value: 50 nA leakage prevents offset drift in high-gain instrumentation amplifiers; 12.8 V clamping preserves ADC input stage integrity during load dump or jump-start events. | Use Scenario: Safeguarding 5 V power rails feeding USB-C controllers and display drivers in dashboard head units. IC Role / Device Role / Timing Role: TVS diode mounted at power entry point to suppress conducted transients from vehicle harness coupling. Use Value: 30 kV ESD immunity meets OEM EMC specifications; SOD323 size allows placement adjacent to connectors without increasing board area. |
| Hybrid Electric Vehicle (HEV) 12 V Auxiliary System | e-Bike Motor Controller Signal Interface |
Use Scenario: Protecting CAN transceiver VCC pins and logic-level inputs against ignition noise and alternator ripple in HEV auxiliary 12 V networks. IC Role / Device Role / Timing Role: Unidirectional TVS on 5 V regulator output supplying isolated CAN PHYs. Use Value: –55 °C to +150 °C operation accommodates under-hood temperature cycling; 190 pF capacitance avoids CAN bit timing skew. | Use Scenario: Shielding hall-effect sensor inputs and gate driver enable lines in compact e-bike motor control modules exposed to vibration and moisture. IC Role / Device Role / Timing Role: Point-of-load TVS on low-voltage logic signals interfacing with BLDC motor commutation circuitry. Use Value: SOD323 package withstands mechanical shock per AEC-Q200; 0.3 Ω dynamic resistance minimizes voltage overshoot during MOSFET switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Higher VBR (6.4–7.0 V), higher VCL (9.2 V @ 10 A), larger SMA package (4.5 mm × 2.7 mm) | Less suitable for space-constrained BMS PCBs; higher leakage (~1 µA) impacts precision sensing | Preferable only when higher surge current rating (400 W) is required and board area permits |
| TPD1E05U06DPYR | Lower VBR (5.0 V typ), lower VCL (7.5 V @ 5 A), same SOD-323, but rated only to 12 kV ESD | Insufficient for ISO 10605 level 4 (30 kV); not AEC-Q101 qualified | Select only for non-automotive consumer applications where cost and ultra-low capacitance (12 pF) outweigh automotive compliance needs |
Compared with SMAJ5.0A and TPD1E05U06DPYR, ESDA051-1JY uniquely balances AEC-Q101 qualification, 30 kV ESD immunity, 50 nA leakage, and SOD323 footprint-making it the only option validated for precision, high-reliability BMS cell monitoring in EV/HEV platforms.
Availability
ESDA051-1JY is available at Aetrix Electronics and suitable for battery management systems, automotive infotainment power rails, HEV auxiliary networks, and e-bike motor controller interfaces requiring stable component supply across multi-year production cycles.
Supply support for ESDA051-1JY 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, specializing in automotive, industrial, and power discrete technologies with vertical manufacturing capability.
The ESDA051-1JY belongs to ST's automotive-qualified TVS diode portfolio, engineered specifically for robust transient suppression in high-accuracy battery sensing and vehicle network interfaces.
FAQ
Is ESDA051-1JY suitable for bidirectional signal line protection?
No. ESDA051-1JY is unidirectional and protects only positive-going transients relative to ground. For bidirectional protection (e.g., USB data lines), ST recommends ESDALC6V1-1U2 or ESDA6V1SC6.
What is the maximum recommended trace length between ESDA051-1JY and protected IC input?
Trace inductance directly impacts clamping performance. ST specifies ≤3 mm total path length (anode-to-IC + cathode-to-ground) to maintain sub-15 V clamping under 20 A transients; longer traces increase overshoot due to L·di/dt.
Does ESDA051-1JY require derating at elevated ambient temperatures?
Yes. Peak pulse current rating drops linearly above 25 °C ambient: at 125 °C, IPP is reduced to ~12 A (per Figure 2). Designers must verify worst-case junction temperature using thermal resistance and power dissipation models.
Can ESDA051-1JY replace older ESDA051-1WY in existing designs?
Yes-ESDA051-1JY supersedes ESDA051-1WY with identical electrical specs and SOD323 footprint. The "JY" suffix denotes updated ECOPACK2 compliance and reflow profile alignment; no layout or schematic changes are needed.
ESDA051-1JY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SC-76, SOD-323
- Series:
- ESDA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 12.8V
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
ESDA051-1JY FAQ
1.How can I place an order for ESDA051-1JY through Aetrix?
Please submit a Request for Quotation (RFQ) for ESDA051-1JY 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 ESDA051-1JY reliable?
The price and inventory of ESDA051-1JY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESDA051-1JY is usually 5 days.
3.What payment methods are accepted for ESDA051-1JY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESDA051-1JY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESDA051-1JY?
ESDA051-1JY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESDA051-1JY 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 ESDA051-1JY?
For technical support, including ESDA051-1JY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESDA051-1JY requirements.
6.How does Aetrix verify that ESDA051-1JY is sourced from the original manufacturer or authorized distributors?
All ESDA051-1JY 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 ESDA051-1JY meets industry standards.
7.What is the process for return or replacement of ESDA051-1JY?
All ESDA051-1JY units undergo pre-shipment inspection (PSI). If there is an issue with ESDA051-1JY, 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 ESDA051-1JY part is unused and in its original packaging.
Return procedure for ESDA051-1JY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESDA051-1JY Tags
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