My Inquiry
My Account
Taiwan Semiconductor Corporation SMDJ14AH
- Part No.:
- SMDJ14AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ14AH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,523
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ14AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 14V working stand-off voltage, 15.6–17.2V breakdown voltage at 1mA, and 23.2V clamping voltage at 129.3A peak pulse current. It is AEC-Q101 qualified and designed for automotive and industrial surge protection in power rails and I/O lines.
For engineers reviewing the SMDJ14AH datasheet, SMDJ14AH pinout, SMDJ14AH application, or SMDJ14AH equivalent, key selection criteria include its DO-214AB (SMC) package, 175°C junction temperature rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and unidirectional ESD/transient suppression capability in space-constrained PCB layouts.
Technical Context
The SMDJ14AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient response (<1.0ps) and stable clamping under high-energy surges. Its thermal design supports 75°C/W junction-to-ambient resistance and 15°C/W junction-to-lead resistance, enabling reliable operation up to 175°C junction temperature.
It meets stringent automotive immunity standards including ISO 7637-2 for load dump and switching transients, with a 3000W peak pulse power rating at 1ms and 129.3A maximum peak impulse current. The device exhibits 1µA max reverse leakage at 14V and 3.5V forward voltage at 100A, confirming low conduction loss during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 15.6 V / 17.2 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 23.2 V - Clamped voltage across device at 129.3 A peak pulse, limiting downstream stress |
| PPK | 3000 W - Peak pulse power handling per 1 ms waveform, critical for lightning/ESD robustness |
| TJ max | 175 °C - Maximum allowable junction temperature, supporting under-hood automotive use |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height |
| Response time | <1.0 ps - Enables effective suppression of ultrafast ESD events (IEC 61000-4-2) |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Weight: 0.290 g. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return in unidirectional configuration |
| Cathode | Clamping node / Protected line connection | Connected to the line being protected (e.g., 12V rail); conducts when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees immunity to real-world automotive transients: Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), Pulse 3a/3b (switching noise) |
| Moisture sensitivity level 1 | Enables direct placement without baking, reducing manufacturing cost and process complexity |
| Halogen-free construction | Complies with IEC 61249-2-21, supporting RoHS and environmental compliance requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body control modules, and lighting drivers from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power input and ground to shunt surge energy before it reaches downstream regulators or microcontrollers. Use Value: Limits voltage to ≤23.2V during 3000W transients, preventing damage to 3.3V/5V logic and ensuring ASIL-B system integrity. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in PLCs and motor drives from ESD and inductive kickback. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to absorb ±8kV contact ESD (IEC 61000-4-2) without signal distortion. Use Value: Sub-1ps response ensures clamping before sensitive op-amps or ADC front-ends are overstressed, preserving measurement accuracy. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Line Protection |
Use Scenario: Securing 48V DC input stages of PoE-powered switches and base station radios against lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge arrestor on main DC bus, coordinated with upstream fuses and downstream TVS arrays. Use Value: 3000W rating handles multi-kA induced surges per IEC 61000-4-5, while DO-214AB footprint enables high-current PCB trace routing. | Use Scenario: Adding secondary-level surge protection on 5V/9V/15V USB PD power paths in portable docking stations and monitors. IC Role / Device Role / Timing Role: Fast-clamping unidirectional TVS placed after buck converter output to protect connected devices from supply-side transients. Use Value: 23.2V clamping prevents overvoltage damage to USB PD controllers and Type-C port ICs during hot-plug or adapter fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14 | Same 14V VWM, but lower PPK = 1500W; smaller DO-214AA (SMB) package | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or automotive load dump | Select only for cost-sensitive consumer applications with <1.5kW surge exposure |
| SMLJ14A | Identical VWM/VBR/VC specs and DO-214AB package; same 3000W rating but not AEC-Q101 qualified | Not validated for automotive temperature cycling or humidity testing; requires additional qualification effort | Use where automotive qualification is not mandated but mechanical and electrical compatibility is required |
Compared with SAC14 and SMLJ14A, the SMDJ14AH delivers certified automotive reliability, higher surge margin, and guaranteed ISO 7637-2 immunity-making it the preferred choice for Tier-1 automotive subsystems and industrial equipment requiring zero-field-failure performance.
Availability
SMDJ14AH is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMDJ14AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 validation capabilities.
The SMDJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing robust clamping, fast response, and standardized SMC packaging for automated assembly.
FAQ
What is the maximum clamping voltage of the SMDJ14AH under surge conditions?
The SMDJ14AH has a maximum clamping voltage (VC) of 23.2 V at 129.3 A peak pulse current (IPPM), measured per the 10/1000 µs waveform defined in IEC 61000-4-5. This value ensures downstream circuitry remains within safe operating limits during high-energy transients such as ISO 7637-2 Pulse 1, and is verified across production lots per TSC's qualification testing protocol for the SMDJ14AH.
Is the SMDJ14AH suitable for bidirectional transient protection?
No-the SMDJ14AH is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications, the SMDJ14CAH variant must be used. The SMDJ14AH features a cathode band marking and conducts only in reverse bias above VBR; using it in AC or floating configurations risks failure due to forward conduction during negative transients.
Does the SMDJ14AH require derating at elevated ambient temperatures?
Yes-the SMDJ14AH's peak pulse power rating decreases linearly above 25°C ambient, following the derating curve in Figure 2 of the datasheet. At 100°C ambient, its 3000W rating drops to approximately 1500W. Designers must apply thermal modeling and ensure adequate PCB copper area or airflow to maintain TJ ≤ 175°C during repetitive surge events, especially in enclosed automotive environments.
What is the forward voltage drop of the SMDJ14AH at high current?
The SMDJ14AH exhibits a forward voltage (VF) of 3.5 V at 100 A, per the Absolute Maximum Ratings table. This value applies only during forward conduction (e.g., accidental reverse PCB orientation or fault conditions), and is relevant for fuse coordination and short-circuit energy calculations-not normal operation, since the device is intended to conduct only in reverse breakdown during transients.
How does the SMDJ14AH compare to standard SMAJ-series TVS diodes?
The SMDJ14AH offers 3× higher peak pulse power (3000W vs. 400W for SMAJ14A) and uses the larger DO-214AB (SMC) package versus DO-214AC (SMA), enabling greater thermal mass and surge endurance. Its AEC-Q101 qualification, ISO 7637-2 compliance, and 175°C TJ rating further distinguish the SMDJ14AH for mission-critical automotive and industrial use cases where the SMAJ14A would be insufficient.
SMDJ14AH 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 129.3A
- 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)
SMDJ14AH FAQ
1.How can I place an order for SMDJ14AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ14AH 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 SMDJ14AH reliable?
The price and inventory of SMDJ14AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ14AH is usually 5 days.
3.What payment methods are accepted for SMDJ14AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ14AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ14AH?
SMDJ14AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ14AH 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 SMDJ14AH?
For technical support, including SMDJ14AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ14AH requirements.
6.How does Aetrix verify that SMDJ14AH is sourced from the original manufacturer or authorized distributors?
All SMDJ14AH 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 SMDJ14AH meets industry standards.
7.What is the process for return or replacement of SMDJ14AH?
All SMDJ14AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ14AH, 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 SMDJ14AH part is unused and in its original packaging.
Return procedure for SMDJ14AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ14AH 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…
