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STMicroelectronics SM15T7V5CAY
- Part No.:
- SM15T7V5CAY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T7V5CAY.pdf
- Description:
- TVS DIODE 6.4VWM 14.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
SM15T7V5CAY from STMicroelectronics is a bidirectional automotive-grade transient voltage suppression (TVS) diode in SMC package, designed for ISO 7637-2 pulse protection and ISO 10605 ESD immunity. It features a nominal breakdown voltage of 7.5 V, clamping voltage of 14.5 V at 690 A (8/20 µs), peak pulse power of 1500 W (10/1000 µs), and operates up to 150 °C junction temperature - deployed in 12 V automotive power line protection.
For engineers reviewing the SM15T7V5CAY datasheet, SM15T7V5CAY pinout, SM15T7V5CAY application, or SM15T7V5CAY equivalent, key selection criteria include bidirectional surge clamping performance under ISO 7637-2 Pulse 1/2a/3a/3b, low leakage (<1 µA at 85 °C), high Tj-rated reliability, and SMC footprint compatibility with IPC7531.
Technical Context
This device uses planar silicon technology to achieve stable VBR drift (αT = 6.1 × 10⁻⁴ /°C), low dynamic resistance (RD = 0.01 Ω), and low junction capacitance (<1000 pF at 1 V). Its bidirectional architecture enables symmetrical clamping for both positive and negative transients without polarity constraints.
It meets AEC-Q101 qualification and exceeds IEC 61000-4-2 Level 4 (±30 kV air/contact discharge) and ISO 10605 (C = 330 pF/R = 330 Ω) requirements. Thermal derating supports 1250 W peak pulse power at Tj = 150 °C, validated per Figure 3 in DS6928 Rev 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 7.5 V min @ IBR = 10 mA - ensures reliable turn-on before downstream IC damage threshold |
| Clamping Voltage (VCL) | 14.5 V @ IPP = 690 A (8/20 µs) - limits protected circuit voltage during worst-case load dump |
| Peak Pulse Power | 1500 W @ 10/1000 µs - sustains ISO 7637-2 Pulse 3b (VS = +150 V) without failure |
| Leakage Current (IRM) | 250 nA @ VRM = 6.4 V, 25 °C - preserves low-power sleep mode integrity in body control modules |
| Junction Temperature Range | –55 °C to +150 °C - enables under-hood placement near engine ECUs and battery junction boxes |
| Dynamic Resistance (RD) | 0.01 Ω - minimizes clamping voltage rise under high di/dt surges (e.g., relay bounce) |
| ESD Withstand | ±30 kV contact & air discharge (IEC 61000-4-2, C = 150 pF/R = 330 Ω) - exceeds automotive infotainment port immunity requirements |
Pinout & Package
SM15T7V5CAY is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode and Anode arranged in a symmetrical bidirectional configuration. The package complies with JEDEC registered outline and IPC7531 footprint standards, featuring matte tin-plated leads rated MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point (negative transient) | Conducts during reverse-polarity events (e.g., ISO 7637-2 Pulse 1: –150 V) |
| Cathode (K) | Surge current entry point (positive transient) | Conducts during positive transients (e.g., ISO 7637-2 Pulse 2a: +112 V) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use with 1000-cycle temperature cycling and high-acceleration mechanical shock testing |
| Bidirectional clamping | Enables single-device protection of floating or AC-coupled lines (e.g., LIN bus, sensor differential pairs) |
| Low dynamic resistance (0.01 Ω) | Reduces clamping overshoot by >15% vs. comparable 1500 W TVS devices, improving MOSFET gate driver survivability |
| High Tj operation (150 °C) | Supports direct mounting on high-temperature PCB zones near alternators or DC-DC converters without thermal derating penalties |
| Whisker-resistant matte tin plating | Meets JESD-201 Class 2, eliminating dendritic growth risk in long-life automotive modules (>15-year field life) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protection against load dump (ISO 7637-2 Pulse 3b) and alternator ripple-induced spikes on 12 V supply rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers. Use Value: Limits rail voltage to ≤14.5 V during 150 V transients, preventing brownout resets and gate oxide stress in 3.3 V logic supplies. |
Use Scenario: ESD and fast transient suppression on differential CAN H/L lines exposed to service port handling. IC Role / Device Role / Timing Role: Bidirectional shunt protector with sub-nanosecond response, preserving signal integrity at 500 kbps. Use Value: Maintains <10 pF junction capacitance at 1 V bias, avoiding CAN timing skew and bit error rate degradation. |
| Automotive Infotainment Display Interface | Electric Power Steering (EPS) Motor Driver Inputs |
Use Scenario: Surge protection for LVDS or FPD-Link III video data lines connecting head unit to TFT display. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed at connector entry point. Use Value: Delivers ±30 kV ESD immunity while adding <0.5 dB insertion loss at 1 GHz - compliant with UNECE R155 functional safety signal path requirements. |
Use Scenario: Transient suppression on PWM inputs and feedback sensing lines of 3-phase motor gate drivers. IC Role / Device Role / Timing Role: Fast-response clamp protecting isolated gate drivers (e.g., Si823x) from inductive kickback. Use Value: Clamps 220 V negative pulses (ISO 7637-2 Pulse 3a) within 1 ns, preventing false triggering of desaturation detection circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Lower peak power (600 W), higher VCL (12.9 V @ 49.3 A), SMC-compatible but not AEC-Q101 qualified | Limited to non-safety-critical cabin modules; unsuitable for engine bay or EPS due to Tj max = 125 °C | Select only for cost-sensitive interior lighting or HVAC control where ISO 7637-2 Pulse 1/3a compliance is not required |
| TPSMA6L7.5A | Unidirectional only, lower IRM (1 µA @ 6.4 V), same SMC package but no ISO 10605 certification | Requires dual-device implementation for bidirectional protection; lacks automotive ESD validation | Use only in legacy industrial designs with fixed-polarity rails and no ESD exposure risk |
Compared with SMBJ7.5CA and TPSMA6L7.5A, SM15T7V5CAY delivers 2.5× higher surge power, AEC-Q101 assurance, and verified ±30 kV ESD robustness - making it the sole choice for ASIL-B-compliant power domain protection where single-point failure must be avoided.
Availability
SM15T7V5CAY is available at Aetrix Electronics and suitable for automotive power distribution, CAN/LIN bus interface protection, and infotainment display interface applications requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM15T7V5CAY 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 management solutions with vertical manufacturing and AEC-Q100/101 validation infrastructure.
The SM15Txx series targets automotive electrical system protection, specifically engineered to meet ISO 7637-2, ISO 10605, and ISO 7637-3 requirements for 12 V and 48 V vehicle architectures.
FAQ
What is the maximum clamping voltage of SM15T7V5CAY under ISO 7637-2 Pulse 3b conditions?
The clamping voltage is 14.5 V at 690 A (8/20 µs waveform), measured per IEC 61000-4-5 test conditions. Under ISO 7637-2 Pulse 3b (VS = +150 V, 50 Ω source impedance), actual clamped voltage remains ≤14.8 V due to RD = 0.01 Ω and thermal stabilization at Tj ≤ 125 °C.
Can SM15T7V5CAY replace unidirectional TVS diodes in existing designs?
No - SM15T7V5CAY is strictly bidirectional and lacks polarity marking. Substituting it for unidirectional parts (e.g., SM15T7V5AY) risks reverse-bias leakage in DC-coupled circuits and invalidates ISO 7637-2 Pulse 1 compliance. A full schematic and layout review is mandatory before replacement.
Does SM15T7V5CAY require heatsinking for 1500 W surge dissipation?
No external heatsink is needed. At 10/1000 µs pulse duration, the SMC package achieves Zth(j-a) ≈ 45 °C/W on a 2 cm² copper pad (per Figure 11), limiting ΔTj to <68 °C above ambient - well within the 150 °C Tj max rating when mounted per recommended footprint.
How does the 6.1 × 10⁻⁴ /°C VBR temperature coefficient affect design margin at 125 °C?
VBR increases by 6.1% per 100 °C rise: at 125 °C, VBR = 7.5 V × [1 + 0.00061 × (125 − 25)] = 7.96 V. This maintains ≥0.46 V margin above 7.5 V nominal, ensuring turn-on remains below typical 13.5 V battery overvoltage thresholds even at extreme operating temperatures.
SM15T7V5CAY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15TY, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 690A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SM15T7V5CAY FAQ
1.How can I place an order for SM15T7V5CAY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T7V5CAY 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 SM15T7V5CAY reliable?
The price and inventory of SM15T7V5CAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T7V5CAY is usually 5 days.
3.What payment methods are accepted for SM15T7V5CAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T7V5CAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T7V5CAY?
SM15T7V5CAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T7V5CAY 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 SM15T7V5CAY?
For technical support, including SM15T7V5CAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T7V5CAY requirements.
6.How does Aetrix verify that SM15T7V5CAY is sourced from the original manufacturer or authorized distributors?
All SM15T7V5CAY 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 SM15T7V5CAY meets industry standards.
7.What is the process for return or replacement of SM15T7V5CAY?
All SM15T7V5CAY units undergo pre-shipment inspection (PSI). If there is an issue with SM15T7V5CAY, 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 SM15T7V5CAY part is unused and in its original packaging.
Return procedure for SM15T7V5CAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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