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Taiwan Semiconductor Corporation SMDJ26AH
- Part No.:
- SMDJ26AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ26AH.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,101
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Product details
Overview
SMDJ26AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 26V working stand-off voltage, 28.9–31.9V breakdown voltage at 1mA test current, and 42.1V maximum clamping voltage at 71.3A peak pulse current. It features AEC-Q101 qualification, glass passivated junction, and DO-214AB (SMC) package for automotive and industrial surge protection.
For engineers reviewing the SMDJ26AH datasheet, SMDJ26AH pinout, SMDJ26AH application, or SMDJ26AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, moisture sensitivity level 1 compliance, fast sub-1ps response time, and unidirectional polarity marking for PCB layout verification.
Technical Context
The SMDJ26AH operates as a unidirectional avalanche diode, designed to clamp transient overvoltages by entering breakdown when reverse voltage exceeds VBR (28.9–31.9V). Its 3000W peak pulse power rating (1ms, 10/1000μs waveform) supports high-energy surge suppression in automotive load-dump and inductive switching events.
Thermal performance is defined by RθJA = 75°C/W and RθJL = 15°C/W, enabling reliable operation up to TJ = +175°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for harsh-environment mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR @ IT=1mA | 28.9–31.9 V - Confirmed breakdown range ensuring predictable turn-on during transients |
| VC @ IPPM=71.3A | 42.1 V - Clamped voltage limiting downstream circuit stress during 3000W surges |
| PPK | 3000 W - Peak pulse power handling per 1ms 10/1000μs waveform per Fig.5 |
| TJ max | +175 °C - Junction temperature limit supporting under-hood automotive placement |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band polarity marking |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by molded band on body. Matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Sub-1ps response time | Enables clamping before sensitive ICs experience damaging voltage overshoot |
| Glass passivated junction | Provides stable VBR tolerance and long-term leakage stability under thermal stress |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow, eliminating bake requirements in SMT assembly |
Applications
| Automotive Power Distribution | Industrial Motor Control |
|---|---|
Use Scenario: Protection of 24V CAN/LIN bus nodes and body control modules against load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground to clamp reverse-energy spikes. Use Value: Limits clamped voltage to 42.1V at 71.3A, preventing damage to 36V-rated microcontrollers and transceivers. | Use Scenario: Surge suppression on DC bus inputs of variable-frequency drives exposed to inductive kickback from contactors and solenoids. IC Role / Device Role / Timing Role: Primary front-end transient suppressor absorbing 3000W pulses without degradation. Use Value: Maintains <1µA leakage at 26V, avoiding unnecessary standby current draw in always-on systems. |
| Telecom Power Input | Consumer Equipment AC/DC Front-End |
Use Scenario: Input-stage protection for PoE-powered switches and base stations subjected to lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Secondary-level TVS after primary gas discharge tube, providing precise low-clamp voltage. Use Value: Achieves 42.1V clamping at 71.3A, reducing stress on downstream TVS arrays and DC-DC controllers. | Use Scenario: Overvoltage safeguard on 24V auxiliary rails in smart home hubs and set-top boxes with external adapters. IC Role / Device Role / Timing Role: Standoff-rated suppressor preventing latch-up in USB-C PD controllers and PMICs. Use Value: Operates within ±5% VBR tolerance (28.9–31.9V), ensuring consistent turn-on across production lots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC26 | Lower PPK = 1500W; VC = 45.7V @ 42.5A; same DO-214AB package | Not rated for ISO 7637-2 Pulse 1; limited to lower-energy consumer-grade transients | Select SMDJ26AH where full automotive surge immunity is required; SAC26 suits cost-sensitive non-automotive designs |
| 1.5SMC26A | Same VWM/VBR/VC specs; PPK = 1500W; RoHS-compliant but not AEC-Q101 qualified | Lacks automotive qualification and ISO 7637-2 validation; no moisture sensitivity level certification | Choose SMDJ26AH for AEC-Q101 and moisture-safe SMT lines; 1.5SMC26A acceptable for industrial prototypes without qualification mandates |
Compared with SAC26 and 1.5SMC26A, the SMDJ26AH delivers verified 3000W surge capacity, AEC-Q101 qualification, and ISO 7637-2 compliance-critical for production automotive ECUs where single-point failure must be avoided.
Availability
SMDJ26AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor control, telecom power input, and consumer equipment AC/DC front-end applications requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMDJ26AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and computing markets since 1979.
The SMDJ series was developed specifically for high-reliability transient suppression in automotive subsystems, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in DO-214AB packaging.
FAQ
What is the maximum clamping voltage of the SMDJ26AH under peak pulse conditions?
The SMDJ26AH has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 71.3 A (10/1000 μs waveform). This value is measured per JEDEC standards and ensures downstream components see no more than 42.1 V during a 3000W transient event. The SMDJ26AH maintains this clamping performance across its specified junction temperature range of –55°C to +175°C.
Is the SMDJ26AH suitable for bidirectional transient suppression?
No, the SMDJ26AH is a unidirectional TVS diode intended for suppression of positive transients only. For bidirectional protection, the SMDJ26CAH variant must be used-it shares the same VWM, VBR, and VC ratings but functions symmetrically in both polarities. The SMDJ26AH's cathode band marking and forward voltage characteristics confirm its unidirectional design, and using it in reverse-biased AC applications may result in failure.
Does the SMDJ26AH meet automotive qualification standards?
Yes, the SMDJ26AH is AEC-Q101 qualified and explicitly validated for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles, supports junction temperatures up to +175°C, and carries moisture sensitivity level 1 (MSL-1) per J-STD-020-enabling direct placement without baking. These qualifications are documented in Taiwan Semiconductor's official SMDJ10AH–SMDJ100AH datasheet Version B2104.
What is the thermal resistance from junction to ambient for the SMDJ26AH?
The SMDJ26AH has a typical junction-to-ambient thermal resistance (RθJA) of 75°C/W when mounted on a standard 1-inch² copper pad on a 1.6mm FR-4 PCB. Its junction-to-lead resistance (RθJL) is 15°C/W. These values assume proper PCB copper area and airflow; derating is required above 25°C ambient per Figure 2 in the datasheet. Thermal performance directly impacts sustained surge repetition rate and long-term reliability in enclosed automotive modules.
How does the SMDJ26AH compare to standard 1500W TVS diodes like 1.5SMC26A?
The SMDJ26AH provides double the peak pulse power (3000W vs. 1500W) and is AEC-Q101 qualified with ISO 7637-2 validation-features absent in the 1.5SMC26A. While both share DO-214AB packaging and similar VWM/VBR specs, only the SMDJ26AH guarantees performance in automotive load-dump scenarios. The SMDJ26AH also offers MSL-1 handling and JESD201 Class 2 whisker resistance, making it suitable for automated high-reliability SMT lines.
SMDJ26AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71.3A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ26AH FAQ
1.How can I place an order for SMDJ26AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ26AH 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 SMDJ26AH reliable?
The price and inventory of SMDJ26AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ26AH is usually 5 days.
3.What payment methods are accepted for SMDJ26AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ26AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ26AH?
SMDJ26AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ26AH 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 SMDJ26AH?
For technical support, including SMDJ26AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ26AH requirements.
6.How does Aetrix verify that SMDJ26AH is sourced from the original manufacturer or authorized distributors?
All SMDJ26AH 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 SMDJ26AH meets industry standards.
7.What is the process for return or replacement of SMDJ26AH?
All SMDJ26AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ26AH, 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 SMDJ26AH part is unused and in its original packaging.
Return procedure for SMDJ26AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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