My Inquiry
My Account
Taiwan Semiconductor Corporation 3KSMC26AH
- Part No.:
- 3KSMC26AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KSMC26AH.pdf
- Description:
- 3000W, 25.7V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,197
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KSMC26AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 25.7V typical breakdown voltage (VBR), 35.5V maximum clamping voltage (VC) at 84.5A peak pulse current, and 175°C maximum junction temperature - deployed for overvoltage protection in automotive BLDC motor drives.
For engineers reviewing the 3KSMC26AH datasheet, 3KSMC26AH pinout, 3KSMC26AH application, or 3KSMC26AH equivalent, key selection criteria include unidirectional polarity, 24.4–27.0V VBR range, 3000W PPPM rating, thermal resistance (RθJL = 17°C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The 3KSMC26AH operates as a silicon avalanche diode optimized for fast-response transient suppression using a 10/1000µs waveform. Its unidirectional configuration enables reverse-biased clamping only, with VBR specified at 1mA test current and VC measured at 84.5A IPPM.
Thermal performance is characterized with RθJL = 17°C/W and RθJA = 50°C/W on a 16mm × 16mm Cu pad PCB, supporting sustained operation up to TJ = 175°C. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b and IEC 61000-4-2 Level 4 ESD immunity standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 24.4V / 25.7V / 27.0V - defines minimum voltage at which avalanche conduction begins reliably at 1mA; critical for threshold alignment with protected circuit's max operating voltage |
| VC @ IPPM | 35.5V - maximum clamped voltage during 3000W 10/1000µs surge; ensures downstream ICs see <35.5V under worst-case transients |
| IPPM | 84.5A - peak pulse current corresponding to 3000W rating; determines minimum trace width and PCB layout robustness needed |
| RD | 0.116Ω - dynamic resistance derived from VC–VBR/IPPM; lower value improves clamping linearity and energy handling consistency |
| TJ max | 175°C - maximum allowable junction temperature; supports high-ambient environments like engine bay or power inverter enclosures |
| αT | 9.6×10−4/°C - temperature coefficient of VBR; used to calculate VBR drift across operating temperature range |
| Polarity | Unidirectional - blocks forward current until VF ~1.2V, clamps reverse surges above VBR; requires correct cathode-band orientation in layout |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band, weight ≈0.210g, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or low-side rail); must be routed with adequate current-carrying capacity for 300A IFSM |
| Cathode | Clamping terminal | Connected to protected line (e.g., 24V supply rail); cathode band marks this terminal - incorrect orientation disables protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, UHAST - enables use in safety-critical vehicle subsystems |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 compliance | Withstands ±8kV contact / ±15kV air discharge ESD events without degradation - eliminates need for external ESD filters in infotainment or body control modules |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity | Survives load-dump, inductive switching, and battery disconnect transients common in 12V/24V automotive systems - reduces risk of MCU reset or sensor latch-up |
| Moisture sensitivity level 1 (J-STD-020) | No floor-life limitation or bake requirement before reflow - simplifies SMT assembly and avoids moisture-induced popcorn failure |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 halogen limits and EU RoHS Directive 2011/65/EU - supports environmental compliance for global OEM programs |
Applications
| Automotive Power Distribution | BLDC Motor Control |
|---|---|
Use Scenario: Protection of 24V supply lines feeding body control modules (BCM), lighting controllers, or ADAS sensors against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed in parallel with input rail to clamp surges above 27V while maintaining low leakage (<3µA at 22V). Use Value: Prevents damage to 24V-rated DC-DC converters and microcontrollers during ISO 7637-2 Pulse 5a events up to 35V/100ms. | Use Scenario: Input rail protection for 3-phase inverter gate drivers and current-sense amplifiers in electric power steering (EPS) or HVAC blower systems. IC Role / Device Role / Timing Role: Fast-clamping device absorbing commutation spikes induced by MOSFET switching in H-bridge configurations. Use Value: Limits voltage overshoot to ≤35.5V during 84.5A transients, preserving gate oxide integrity and analog front-end accuracy. |
| Battery Management Systems | Industrial Switching Power Supplies |
Use Scenario: Overvoltage safeguard on cell-balancing IC inputs and fuel-gauge communication lines in 24V Li-ion packs for commercial vehicles. IC Role / Device Role / Timing Role: Transient suppressor between battery stack monitor IC and high-side FET gate drive path. Use Value: Clamps ESD and inductive kickback to <35.5V, preventing latch-up in precision ADCs and I²C interfaces operating near 24V nominal. | Use Scenario: Secondary-side output rail protection in telecom rectifiers and industrial AC-DC supplies where 24V/48V outputs interface with PLC I/O modules. IC Role / Device Role / Timing Role: Standoff diode absorbing line transients coupled through transformer leakage inductance or secondary-side EMI filters. Use Value: Maintains regulated output stability during 3000W surges without derating output capacitance or requiring additional crowbar circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A (Bourns) | Same DO-214AA (SMB) package; 3000W rating; VBR = 28.9–32.0V; VC = 42.1V @ 71.3A; higher clamping voltage than 3KSMC26AH | Less effective clamping margin for 24V systems due to +6.6V higher VC; suitable where board space allows larger footprint | Select if existing SMB footprint is fixed and higher VC is acceptable for system-level margin |
| SMCJ26A (Littelfuse) | DO-214AB (SMC) package identical to 3KSMC26AH; VBR = 28.9–32.0V; VC = 42.1V @ 71.3A; same thermal specs but no AEC-Q101 documentation publicly available | Lacks AEC-Q101 validation; not recommended for automotive production unless customer-qualified separately | Prefer for industrial non-automotive use where cost or lead time favors Littelfuse sourcing |
Compared with SMBJ26A and SMCJ26A, the 3KSMC26AH offers tighter VBR (24.4–27.0V) and lower VC (35.5V), delivering superior clamping headroom for 24V systems - especially critical in AEC-Q101-compliant automotive designs where voltage margin directly impacts functional safety compliance.
Availability
3KSMC26AH is available at Aetrix Electronics and suitable for automotive power distribution, BLDC motor control, battery management systems, and industrial switching power supplies requiring stable component supply and long-term lifecycle support.
Supply support for 3KSMC26AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers since 1979.
The 3KSMCxxAH series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting high-reliability 12V/24V systems with stringent thermal and ESD immunity requirements.
FAQ
What is the breakdown voltage tolerance for 3KSMC26AH?
The 3KSMC26AH has a guaranteed breakdown voltage (VBR) range of 24.4V (min) to 27.0V (max) at 1mA test current, with 25.7V typical. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable design margining against 24V nominal rails.
Does 3KSMC26AH meet automotive qualification standards?
Yes, the 3KSMC26AH is AEC-Q101 qualified and tested per JESD22-A108 for temperature cycling, JESD22-A104 for HTOL, and JESD22-A110 for HAST. It also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b and IEC 61000-4-2 Level 4 - making it suitable for under-hood and chassis-mounted automotive applications.
What is the maximum clamping voltage of 3KSMC26AH under surge conditions?
The 3KSMC26AH exhibits a maximum clamping voltage (VC) of 35.5V when subjected to an 84.5A peak pulse current (IPPM) with a 10/1000µs waveform. This value is measured at TA = 25°C and is critical for ensuring downstream components remain within safe operating voltage limits during transients.
Can 3KSMC26AH be used in bidirectional protection circuits?
No, the 3KSMC26AH is a unidirectional TVS diode and provides clamping only in reverse bias. For bidirectional protection (e.g., data lines or AC-coupled signals), a dedicated bidirectional part such as 3KSMC26A (dual-diode configuration) or separate back-to-back unidirectional devices would be required instead of 3KSMC26AH.
What is the thermal resistance from junction to lead (RθJL) for 3KSMC26AH?
The junction-to-lead thermal resistance (RθJL) of the 3KSMC26AH is 17°C/W when mounted on a standard 16mm × 16mm copper pad PCB. This low value enables efficient heat transfer to the PCB plane, supporting continuous operation at elevated ambient temperatures up to 125°C with appropriate board layout.
3KSMC26AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V (Max)
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- DO-214AB (SMC)
3KSMC26AH FAQ
1.How can I place an order for 3KSMC26AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KSMC26AH 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 3KSMC26AH reliable?
The price and inventory of 3KSMC26AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KSMC26AH is usually 5 days.
3.What payment methods are accepted for 3KSMC26AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KSMC26AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KSMC26AH?
3KSMC26AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KSMC26AH 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 3KSMC26AH?
For technical support, including 3KSMC26AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KSMC26AH requirements.
6.How does Aetrix verify that 3KSMC26AH is sourced from the original manufacturer or authorized distributors?
All 3KSMC26AH 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 3KSMC26AH meets industry standards.
7.What is the process for return or replacement of 3KSMC26AH?
All 3KSMC26AH units undergo pre-shipment inspection (PSI). If there is an issue with 3KSMC26AH, 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 3KSMC26AH part is unused and in its original packaging.
Return procedure for 3KSMC26AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KSMC26AH 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
