My Inquiry
My Account
STMicroelectronics SM6F23AY
- Part No.:
- SM6F23AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOD-128
- Datasheet:
-
SM6F23AY.pdf
- Description:
- TVS DIODE 23VWM 49.2VC SOD128FLT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6F23AY from STMicroelectronics is an AEC-Q101-qualified unidirectional 600 W transient voltage suppressor (TVS) diode in SOD128 Flat package, designed for automotive circuit protection against ISO 7637-2 pulses and IEC/ISO ESD events. It features a 23 V stand-off voltage (VRM), 27 V minimum breakdown voltage (VBR), clamping voltage of 37.8 V at 16.4 A (10/1000 µs), and operates up to 175 °C junction temperature.
For engineers reviewing the SM6F23AY datasheet, SM6F23AY pinout, SM6F23AY application, or SM6F23AY equivalent, this device is selected for high-reliability 12 V/24 V automotive power line surge suppression where low leakage (<1 µA at 85 °C), high-temperature stability, and ISO-compliant clamping performance are critical.
Technical Context
The SM6F23AY uses planar silicon technology to achieve stable VBR temperature coefficient (αT = 9.6 × 10⁻⁴ /°C) and low dynamic resistance (RD = 0.573 Ω at 10/1000 µs). Its unidirectional configuration enables asymmetric surge handling-blocking reverse surges while conducting forward transients into ground.
It meets stringent automotive immunity standards: ISO 10605 ±30 kV (air/contact), IEC 61000-4-2 ±30 kV (150 pF/330 Ω), and ISO 7637-2 Pulse 1 (−150 V), Pulse 2a (+112 V), Pulse 3a (−220 V), Pulse 3b (+150 V), with validated clamping behavior across full Tj range (−55 to +175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 23 V - Maximum continuous reverse operating voltage before significant leakage; sets threshold for system-level overvoltage detection. |
| Breakdown Voltage (VBR) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal bus voltage. |
| Clamping Voltage (VCL) | 37.8 V at 16.4 A (10/1000 µs) - Peak voltage seen by protected IC during surge; defines maximum stress on downstream components. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 240 W at 175 °C - Sustained energy-handling capability under worst-case thermal conditions. |
| Leakage Current (IRM) | 0.2 µA at 25 °C, 1 µA at 85 °C - Minimal standby current draw; avoids battery drain in always-on automotive modules. |
| Junction Temperature Range | −55 to +175 °C - Enables placement near hot engine-control units without derating or thermal shutdown. |
Pinout & Package
SOD128 Flat package: surface-mount, two-terminal, lead-free matte tin-plated leads, JEDEC-registered outline, IPC7531-compliant footprint, MSL Level 1, 260 °C max soldering temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Surge return path | Connected to system ground; conducts transient current during reverse-biased avalanche event. |
| Anode | Protected line input | Connected to automotive supply rail (e.g., battery or alternator output); blocks normal operation voltage but conducts during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity testing per JESD22. |
| Low dynamic resistance (RD) | 0.573 Ω enables tighter clamping control and reduced voltage overshoot during fast transients. |
| High-temperature power derating | Maintains 240 W peak pulse capability at Tj = 175 °C - critical for compact engine bay layouts with limited heatsinking. |
| ESD robustness | Exceeds ISO 10605 ±30 kV (330 pF/330 Ω) - eliminates need for secondary ESD protection in CAN/LIN/Camera power rails. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus Supply |
|---|---|
Use Scenario: Protection of 12 V supply rail feeding microcontroller, fuel injector drivers, and sensor interfaces in gasoline/diesel ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary bidirectional surge clamp on main battery input; absorbs ISO 7637-2 Pulse 1 (−150 V) and Pulse 3b (+150 V) without latch-up. Use Value: Prevents reset or latch-up of 3.3 V/5 V logic supplies by limiting rail voltage to ≤37.8 V during 16.4 A transients. | Use Scenario: Surge suppression on LIN bus VCC line powering door module actuators, mirror controls, and seat position sensors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN transceiver VCC and chassis ground; handles ESD and coupled noise from adjacent high-current loads. Use Value: Maintains <1 µA leakage at 85 °C to avoid battery drain in sleep mode while clamping ±30 kV ESD to <40 V. |
| ADAS Camera Power Rail | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Front-facing camera module powered from vehicle battery with minimal filtering; subject to ignition noise and jump-start transients. IC Role / Device Role / Timing Role: First-line protection on 12 V input to DC/DC converter; triggered within nanoseconds to limit voltage excursion before regulator overvoltage shutdown. Use Value: Clamps 10/1000 µs surges to 37.8 V at 16.4 A, preserving 5 V/3.3 V imaging SoC integrity without requiring oversized input capacitors. | Use Scenario: Protection of H-bridge gate driver supply in EPS systems experiencing frequent PWM switching and motor regeneration spikes. IC Role / Device Role / Timing Role: TVS placed across motor driver VDD and ground; absorbs repetitive 8/20 µs transients up to 49.2 A (8/20 µs) without degradation. Use Value: Enables 4 kW surge handling at 8/20 µs while maintaining <0.6 Ω RD - reduces thermal stress on MOSFETs during regenerative braking events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPP (400 W), higher VCL (43.5 V @ 9.8 A), same SOD-123 package | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 1 (−150 V) in 12 V systems | Select only if cost sensitivity outweighs surge margin and thermal robustness requirements. |
| TPSMD24A | Same VRM (24 V), higher VCL (42.1 V @ 16 A), 600 W rating but no AEC-Q101 certification | Not qualified for automotive under-hood use; requires additional qualification testing for OEM deployment | Acceptable for industrial or commercial 12 V systems where AEC-Q101 is not mandated. |
Compared with SMAJ24A and TPSMD24A, SM6F23AY delivers superior clamping (37.8 V vs ≥42.1 V), verified AEC-Q101 compliance, and guaranteed 240 W operation at 175 °C - making it the only choice for production automotive power rail protection where reliability and thermal margin are non-negotiable.
Availability
SM6F23AY is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SM6F23AY 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 broad IP portfolio.
The SM6FY series belongs to ST's automotive-grade transient protection product line, engineered specifically for ISO 7637-2 and ISO 10605 compliance in 12 V/24 V vehicle architectures - emphasizing thermal resilience, low leakage, and planar reliability for safety-critical power domains.
FAQ
What is the marking code for SM6F23AY on the device body?
The SM6F23AY is marked "5BPY" on the cathode end of the SOD128 Flat package, per Table 6 in DS13062 Rev 3. This 4-character alphanumeric code identifies the stand-off voltage (23 V), unidirectional type (A), and automotive grade (Y), and is laser-etched for readability after reflow.
Does SM6F23AY meet ISO 7637-2 Pulse 1 requirements for 12 V systems?
Yes - SM6F23AY is explicitly validated for ISO 7637-2 Pulse 1 (−150 V, 50 Ω, 2 Ω series impedance) in 12 V battery systems. Its 37.8 V clamping voltage at 16.4 A ensures downstream regulators see less than 40 V during the full −150 V transient, satisfying OEM immunity thresholds.
Can SM6F23AY be used in 24 V commercial vehicle applications?
No - SM6F23AY's 23 V VRM is optimized for 12 V nominal systems. For 24 V applications, ST recommends SM6F33AY (33 V VRM) or SM6F36AY (36 V VRM), which provide appropriate margin above 28 V float voltage and maintain clamping headroom during load dump events.
Is the SOD128 Flat package compatible with standard reflow profiles?
Yes - the SOD128 Flat package supports IPC/JEDEC J-STD-020 MSL Level 1 and is qualified for peak reflow temperatures up to 260 °C for 10 seconds. ST's recommended profile (Figure 24, DS13062) specifies 240–245 °C peak, 60–90 s above 217 °C, with controlled ramp rates to prevent tombstoning or solder voiding.
SM6F23AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOD-128
- Series:
- SM6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23V (Max)
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 49.2V
- Current - Peak Pulse (10/1000µs):
- 81A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD128Flat
SM6F23AY FAQ
1.How can I place an order for SM6F23AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6F23AY 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 SM6F23AY reliable?
The price and inventory of SM6F23AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6F23AY is usually 5 days.
3.What payment methods are accepted for SM6F23AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6F23AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6F23AY?
SM6F23AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6F23AY 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 SM6F23AY?
For technical support, including SM6F23AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6F23AY requirements.
6.How does Aetrix verify that SM6F23AY is sourced from the original manufacturer or authorized distributors?
All SM6F23AY 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 SM6F23AY meets industry standards.
7.What is the process for return or replacement of SM6F23AY?
All SM6F23AY units undergo pre-shipment inspection (PSI). If there is an issue with SM6F23AY, 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 SM6F23AY part is unused and in its original packaging.
Return procedure for SM6F23AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6F23AY Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
