My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ14H
- Part No.:
- SMCJ14H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14H.pdf
- Description:
- 1500W, 17.4V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:5,884
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ14H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 14 V working stand-off voltage (VWM), 15.6–19.1 V breakdown voltage (VBR), and 25.8 V maximum clamping voltage (VC) at 61 A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ14H datasheet, SMCJ14H pinout, SMCJ14H application, or SMCJ14H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, moisture sensitivity level (MSL 1), and real-world clamping performance under standardized 10/1000 µs surge waveforms.
Technical Context
The SMCJ14H uses a glass-passivated silicon junction to achieve fast response (<1.0 ps from 0 V to VBR min) and low leakage (<1 µA at 14 V). Its unidirectional configuration supports DC-biased lines where reverse polarity protection is not required.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing and complies with ISO 7637-2 for load-dump and switching transient immunity. Thermal performance includes RθJA = 55 °C/W and RθJC = 10 °C/W, enabling robust operation up to TJ = +150 °C.
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 / 19.1 V @ IT = 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 25.8 V @ 61 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling per single 1 ms transient |
| IR @ VWM | <1 µA - Minimal leakage at rated stand-off, preserving system efficiency |
| TJ max | +150 °C - Maximum junction temperature supporting under-hood automotive use |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance for PCB-level thermal design |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) |
| MSL Level 1 | No floor life limitation or bake requirement prior to reflow soldering |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 14 V. Use Value: Limits clamping voltage to 25.8 V, preventing damage to 36 V-rated regulators and microcontrollers downstream. | Use Scenario: Safeguarding 24 V digital input modules in factory automation systems exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff device absorbing inductive kick energy before it reaches isolation barriers or FPGA inputs. Use Value: Withstands 61 A peak impulse current and maintains <1 µA leakage at 14 V, ensuring signal integrity during normal operation. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Shielding PoE-powered equipment front-end circuits from lightning-induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Primary clamping element on DC input stage, coordinated with upstream fuses and common-mode chokes. Use Value: 1500 W peak power rating enables survival of multiple 10/1000 µs surges without degradation. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Fast-response TVS across motor terminals to prevent ESD coupling into MCU GPIOs. Use Value: Sub-1 ps response time ensures clamping initiates before sensitive logic sees voltage overshoot beyond 25.8 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Lower PPK (400 W), SMA package (smaller footprint, higher RθJA) | Not suitable for ISO 7637-2 Pulse 1 or high-energy load dump | Select SMCJ14H when 1500 W surge capacity and automotive qualification are mandatory |
| TPSMD14 | Same DO-214AB package, but lower VC (23.2 V) and tighter VBR tolerance (15.6–17.2 V) | Better clamping margin for 16 V tolerant ICs; identical AEC-Q101 and ISO 7637-2 compliance | Choose TPSMD14 if lower clamping voltage improves system safety margin without sacrificing surge rating |
Compared with SMAJ14A and TPSMD14, the SMCJ14H offers superior energy handling (1500 W vs. 400 W or 1500 W) and broader VBR range (15.6–19.1 V), making it optimal for harsh automotive environments where transient amplitude varies widely.
Availability
SMCJ14H is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC power feeds requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ14H 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, specializing in TVS diodes, rectifiers, MOSFETs, and bipolar transistors.
The SMCJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ14H under standard surge conditions?
The SMCJ14H has a maximum clamping voltage (VC) of 25.8 V at 61 A peak pulse current (IPPM), tested with the standardized 10/1000 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SMCJ14H suitable for automotive applications?
Yes, the SMCJ14H is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, supports junction temperatures up to +150 °C, and carries MSL Level 1 rating-making it appropriate for engine control units, body electronics, and ADAS power supplies.
What is the difference between SMCJ14H and SMCJ14AH?
The SMCJ14AH has a tighter breakdown voltage range (15.6–17.2 V) versus SMCJ14H (15.6–19.1 V), achieved via enhanced process control. Both share identical VWM (14 V), VC (25.8 V / 23.2 V), package (DO-214AB), and AEC-Q101 qualification. The SMCJ14H offers broader VBR tolerance for cost-sensitive designs where tighter regulation isn't required.
Does the SMCJ14H have polarity marking, and how is it oriented on the PCB?
Yes, the SMCJ14H features a cathode band (dark stripe) on the DO-214AB package body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the anode connects to ground. Reversing polarity disables clamping functionality and may cause catastrophic failure under reverse bias.
What is the thermal resistance profile of the SMCJ14H, and how does it affect PCB layout?
The SMCJ14H has RθJA = 55 °C/W and RθJC = 10 °C/W. To maintain TJ ≤ 150 °C under worst-case 1500 W pulses, PCB copper area and thermal vias beneath the anode/cathode pads must be optimized. Layout guidelines recommend ≥ 100 mm² of 2 oz copper per terminal and ≥ 4 thermal vias (0.3 mm diameter) per pad to approach datasheet RθJA values.
SMCJ14H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 61A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14H FAQ
1.How can I place an order for SMCJ14H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14H 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 SMCJ14H reliable?
The price and inventory of SMCJ14H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14H is usually 5 days.
3.What payment methods are accepted for SMCJ14H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14H?
SMCJ14H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14H 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 SMCJ14H?
For technical support, including SMCJ14H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14H requirements.
6.How does Aetrix verify that SMCJ14H is sourced from the original manufacturer or authorized distributors?
All SMCJ14H 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 SMCJ14H meets industry standards.
7.What is the process for return or replacement of SMCJ14H?
All SMCJ14H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14H, 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 SMCJ14H part is unused and in its original packaging.
Return procedure for SMCJ14H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14H 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…
