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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

STMicroelectronics SM15T7V5AY

Name: SM15T7V5AY
Brand: STMicroelectronics
SKU: SM15T7V5AY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SM15T7V5AY

Manufacturer:: STMicroelectronics

Category:: TVS Diodes

Package:: DO-214AB, SMC

Datasheet:: SM15T7V5AY.pdf

Description:: TVS DIODE 6.4VWM 14.5VC SMC

Quantity:: RFQ Add To RFQ list

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Inventory:3,196

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Product details

Overview

SM15T7V5AY from STMicroelectronics is a unidirectional automotive-grade transient voltage suppression (TVS) diode in SMC package, designed to protect 12 V automotive electronics against ISO 7637-2 pulses (Pulse 1: −150 V; Pulse 2a: +112 V; Pulse 3a: −220 V; Pulse 3b: +150 V) and ESD per ISO 10605 (±30 kV air/contact). It features 7.5 V nominal breakdown voltage (V_BR), 14.5 V clamping voltage (V_CL) at 690 A (8/20 µs), and 1500 W peak pulse power (10/1000 µs).

For engineers reviewing the SM15T7V5AY datasheet, SM15T7V5AY pinout, SM15T7V5AY application, or SM15T7V5AY equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 3b, low leakage (<250 nA at 25 °C), junction temperature derating to 1250 W at T_j = 150 °C, and SMC footprint compatibility with IPC7531.

Technical Context

This TVS diode uses planar silicon technology to achieve low leakage current (250 nA max at 25 °C) and stable V_BR over temperature (α_T = 6.1 × 10⁻⁴/°C). Its unidirectional configuration provides asymmetric surge protection for DC-biased lines such as power supply rails and sensor inputs in automotive ECUs.

The device meets AEC-Q101 qualification and supports high-reliability operation up to T_j = 150 °C, with dynamic resistance (R_D) of 0.01 Ω at 8/20 µs, enabling fast response to sub-microsecond transients while maintaining low clamping voltage under high-current surges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min)	6.40 V - Ensures reliable conduction onset above normal 12 V system operating voltage with margin.
V_CL @ I_PP = 690 A	14.5 V - Clamps transients to safe levels for downstream 16 V-rated ICs in automotive power domains.
I_RM @ V_RM = 6.4 V	250 nA - Ultra-low leakage preserves battery life in always-on vehicle modules.
P_PP (10/1000 µs)	1500 W - Handles ISO 7637-2 Pulse 1 (−150 V) without failure on standard FR4 PCBs.
T_j max	150 °C - Enables placement near heat-generating components (e.g., power MOSFETs) without derating loss.
R_D	0.01 Ω - Minimizes voltage overshoot during fast-rising ESD events (IEC 61000-4-2).

Pinout & Package

SM15T7V5AY is housed in an SMC (DO-214AB) surface-mount package with two terminals: cathode (marked "MDGY") and anode. The package complies with JEDEC registered outline and IPC7531 footprint, featuring matte tin-plated leads qualified to J-STD-002 and JESD 22-B102 E3.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (marked side)	Surge current sink	Connected to protected line; conducts transient energy to ground when V_AK > V_BR.
Anode	Reference node	Typically tied to system ground or low-impedance return path for bidirectional clamping reference.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive underhood applications with thermal cycling, humidity, and mechanical shock compliance.
ISO 7637-2 Pulse 3b immunity	Withstands +150 V transient (12 V battery system) without degradation or parametric shift.
Low T_j-dependent leakage	Leakage remains ≤1 μA up to 85 °C, critical for always-on telematics and body control modules.
High-power derating capability	Maintains 1250 W surge rating at T_j = 150 °C, enabling compact layout without forced cooling.

Applications

Engine Control Unit (ECU) Power Input

Automotive Camera Module Supply Line

Use Scenario: 12 V battery feed to engine ECU exposed to load dump and alternator ripple.

IC Role / Device Role / Timing Role: Unidirectional TVS clamps negative transients (Pulse 1: −150 V) and positive spikes (Pulse 2a: +112 V) before they reach MCU power regulators.

Use Value: Prevents regulator latch-up and extends ECU lifetime by limiting input voltage to ≤14.5 V during 690 A surges.

Use Scenario: 5 V or 12 V rail powering rear-view camera in parking assist systems.

IC Role / Device Role / Timing Role: Fast-response surge suppressor for video signal integrity and image sensor protection against ESD during connector mating.

Use Value: Clamps ±30 kV contact discharge to <15 V within <1 ns, avoiding pixel corruption or sensor reset.

Body Control Module (BCM) LIN Bus Interface

ADAS Radar Power Distribution

Use Scenario: LIN transceiver power supply in door module subjected to cable harness coupling.

IC Role / Device Role / Timing Role: Low-leakage TVS on V_CC rail ensures no DC loading on 12 V supply while suppressing coupled transients from adjacent high-current wires.

Use Value: 250 nA leakage at 25 °C avoids battery drain in sleep mode; 14.5 V clamping protects LIN PHY ICs rated to 16 V.

Use Scenario: 12 V distribution to 77 GHz radar front-end modules mounted near engine bay.

IC Role / Device Role / Timing Role: High-temperature-stable TVS placed at radar module entry point to absorb ISO 7637-2 Pulse 3a (−220 V) induced by ignition noise.

Use Value: Maintains 1250 W surge capacity at 150 °C junction temperature, eliminating need for thermal derating margins.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional automotive TVS applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ7.5A	Lower peak power (400 W), higher V_CL (12.4 V @ 32.4 A), non-AEC-Q101 rated.	Restricted to non-automotive industrial use; insufficient for ISO 7637-2 Pulse 1/3b compliance.	Select only for cost-sensitive consumer-grade 12 V supplies where AEC-Q101 and 1500 W are not required.
TPSMA6L7.5A	Same V_BR (6.4–7.5 V), lower P_PP (600 W), higher R_D (0.025 Ω), AEC-Q101 qualified.	Limited to Pulse 2a and ESD; cannot sustain ISO 7637-2 Pulse 3b (+150 V) without failure.	Use where space constraints favor SMA package but full 1500 W automotive surge immunity is not needed.

Compared with SMAJ7.5A and TPSMA6L7.5A, SM15T7V5AY delivers 2.5× higher surge power, 0.01 Ω dynamic resistance for tighter clamping, and validated robustness across all ISO 7637-2 pulses-making it the only choice for front-end automotive power rail protection requiring full AEC-Q101 compliance.

Availability

SM15T7V5AY is available at Aetrix Electronics and suitable for engine control units, ADAS radar modules, automotive camera systems, and body control modules requiring stable component supply across extended temperature and surge stress conditions.

Supply support for SM15T7V5AY 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/Q101 qualification expertise.

The SM15TxxAY series belongs to ST's automotive-grade TVS portfolio, engineered specifically for robust protection of 12 V and 24 V vehicle electrical systems against ISO 7637-2 load dump, ISO 10605 ESD, and IEC 61000-4-4 EFT events.

FAQ

What is the maximum clamping voltage of SM15T7V5AY under ISO 7637-2 Pulse 3b?

The SM15T7V5AY clamps to 14.5 V at 690 A (8/20 µs), which directly covers ISO 7637-2 Pulse 3b (+150 V) when used with appropriate series impedance. Its dynamic resistance of 0.01 Ω ensures minimal voltage overshoot during the fast rise time of this pulse, maintaining protection margin for 16 V-rated downstream ICs.

Is SM15T7V5AY compatible with lead-free reflow soldering?

Yes, SM15T7V5AY uses matte tin-plated leads qualified to J-STD-020 MSL level 1 and supports ST's recommended reflow profile with peak temperature of 240–245 °C for 2–3 seconds. The package withstands thermal cycling without delamination or solder joint cracking, meeting IPC/JEDEC standards for automotive production.

How does SM15T7V5AY perform at elevated junction temperatures?

At T_j = 150 °C, SM15T7V5AY retains 1250 W peak pulse power (10/1000 µs), 83% of its room-temperature rating. Its V_BR increases predictably with α_T = 6.1 × 10⁻⁴/°C, and leakage stays ≤1 μA-enabling reliable operation in under-hood environments without external heatsinking.

Can SM15T7V5AY be used in bidirectional configurations?

No-SM15T7V5AY is unidirectional only. For bidirectional protection, ST offers the pin-compatible SM15T7V5CAY variant. Using SM15T7V5AY in reverse-biased configurations risks permanent damage due to lack of symmetric avalanche capability; correct polarity orientation must be maintained per marking ("MDGY" cathode band).

SM15T7V5AY 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:: 1

Bidirectional Channels:: -

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

SM15T7V5AY FAQ

1.How can I place an order for SM15T7V5AY through Aetrix?

Please submit a Request for Quotation (RFQ) for SM15T7V5AY 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 SM15T7V5AY reliable?

The price and inventory of SM15T7V5AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T7V5AY is usually 5 days.

3.What payment methods are accepted for SM15T7V5AY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T7V5AY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SM15T7V5AY?

SM15T7V5AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SM15T7V5AY 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 SM15T7V5AY?

For technical support, including SM15T7V5AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T7V5AY requirements.

6.How does Aetrix verify that SM15T7V5AY is sourced from the original manufacturer or authorized distributors?

All SM15T7V5AY 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 SM15T7V5AY meets industry standards.

7.What is the process for return or replacement of SM15T7V5AY?

All SM15T7V5AY units undergo pre-shipment inspection (PSI). If there is an issue with SM15T7V5AY, 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 SM15T7V5AY part is unused and in its original packaging.

Return procedure for SM15T7V5AY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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