My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ14C
- Part No.:
- SMCJ14C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14C.pdf
- Description:
- 1500W, 17.4V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,101
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ14C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 14V working stand-off voltage (VWM), 15.6–19.1V breakdown voltage (VBR), and 25.8V maximum clamping voltage (VC) at 61A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ14C datasheet, SMCJ14C pinout, SMCJ14C application, or SMCJ14C equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on 12V battery-fed systems.
Technical Context
The SMCJ14C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (15.6–19.1V at 1mA test current); it clamps transients to ≤25.8V at 61A (10/1000μs waveform), limiting energy dissipation via thermal conduction through its DO-214AB case with RθJC = 10°C/W.
It meets ISO 7637-2 immunity requirements for automotive electronics, features glass-passivated junction for stable leakage (<1μA at 14V), and supports bidirectional variants via "CA" suffix - but SMCJ14C itself is unidirectional, with cathode band marking and polarity-sensitive mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; sets system rail margin for 12V automotive applications |
| VBR min/max | 15.6 / 19.1 V @ 1 mA - ensures reliable turn-on above nominal rail while avoiding false triggering during load dump overshoot |
| VC @ IPPM | 25.8 V @ 61 A - peak clamped voltage during 10/1000μs surge; defines worst-case stress on downstream ICs |
| PPK | 1500 W - peak pulse power handling capability per single 1ms event; enables compliance with ISO 7637-2 Pulse 5a |
| IR @ VWM | <1 μA - ultra-low leakage preserves battery life in always-on vehicle modules |
| TJ max | +150 °C - maximum junction temperature rating allows operation in engine bay environments with minimal heatsinking |
| RθJA | 55 °C/W - thermal resistance from junction to ambient; informs PCB copper area requirements for sustained surge duty |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, MSL Level 1, UL 94V-0 molding compound, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference | Connected to ground or low-voltage return; forms clamping path when cathode is at higher potential |
| Cathode | Transient voltage input / high-side connection | Connected to protected line (e.g., 12V rail); conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low IR across temperature and lifetime; eliminates passivation-related drift in harsh automotive environments |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) - critical for ECU front-end protection |
| Fast response time | <1.0 ps from 0 V to VBR min - enables clamping before sensitive logic or analog circuitry sustains damage |
| Automated placement compatibility | DO-214AB footprint and lead coplanarity meet J-STD-002 solderability standards for high-yield reflow assembly |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - required for global automotive OEM supply chains |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver power rails from alternator load dump and relay coil flyback in BCM units. IC Role / Device Role: Unidirectional TVS placed between 12V supply and ground, upstream of LDOs and interface ICs. Use Value: Limits transient voltage to ≤25.8V, preventing latch-up or gate oxide rupture in 3.3V/5V logic powered from buck-converted 12V. | Use Scenario: Safeguarding 24V DC digital input terminals of programmable logic controllers against field-wiring ESD and inductive kickback. IC Role / Device Role: Primary overvoltage clamp on isolated input stage, coordinated with series impedance and optocoupler input. Use Value: Absorbs up to 1500W surges without degradation, maintaining signal integrity during factory floor electromagnetic disturbances. |
| LED Headlamp Driver Supply | Telecom Power Interface |
Use Scenario: Clamping voltage spikes on constant-current LED driver inputs caused by hot-plug events or battery connection bounce. IC Role / Device Role: Front-end transient suppressor on main 12V input rail, ahead of buck controller and gate drivers. Use Value: Withstands repeated 10/1000μs pulses up to 61A, enabling robust headlamp operation in stop-start vehicles. | Use Scenario: Protecting -48V telecom power distribution boards from lightning-induced surges entering via external cabling. IC Role / Device Role: Secondary-level TVS on DC feed lines, used alongside primary GDTs and series inductors. Use Value: Provides precise 25.8V clamping threshold compatible with -48V system grounding schemes and telecom surge standards. |
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 (400W), smaller SMA package, VBR 15.6–17.2V, VC = 23.2V @ 17.3A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients in consumer or industrial non-automotive use | Select SMCJ14C when 1500W surge capacity and DO-214AB thermal mass are required for automotive-grade reliability |
| SMCJ14A | Same package and PPK, tighter VBR tolerance (15.6–17.2V vs. 15.6–19.1V), same VC = 23.2V @ 67A | Improved consistency in clamping onset; preferred where production VBR variation must be minimized across batches | Choose SMCJ14C for cost-sensitive designs accepting wider VBR spread; choose SMCJ14A for tighter parametric control |
Compared with SMAJ14A and SMCJ14A, the SMCJ14C offers identical package and thermal performance as SMCJ14A but with broader VBR tolerance - making it more tolerant of process variation while retaining full 1500W surge capability essential for automotive load-dump compliance.
Availability
SMCJ14C is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for SMCJ14C 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 for automotive, industrial, and computing markets.
The SMCJ series is part of TSC's high-power TVS platform engineered specifically for ISO 7637-2-compliant automotive transient suppression, emphasizing ruggedness, repeatable clamping, and MSL-1 manufacturability.
FAQ
What is the polarity configuration of the SMCJ14C?
The SMCJ14C is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts only when the cathode is positive relative to the anode - making it suitable for protecting positive-rail systems like 12V automotive supplies. Its electrical characteristics do not apply in forward bias beyond VF ≈ 3.5V.
Does the SMCJ14C meet ISO 7637-2 Pulse 5a requirements?
Yes, the SMCJ14C is rated for 1500W peak pulse power and has been validated to meet ISO 7637-2 Pulse 5a (load dump) requirements when mounted on appropriate PCB copper area. Its 25.8V clamping voltage at 61A ensures downstream components see controlled overvoltage stress during simulated alternator disconnection events.
What is the maximum steady-state power dissipation for the SMCJ14C?
The SMCJ14C has a steady-state power dissipation (PD) rating of 5W at TA = 25°C. This value decreases with rising ambient temperature per the derating curve in Figure 2 of the datasheet; at 100°C ambient, PD drops to approximately 2.5W due to thermal resistance limits and junction temperature constraints.
How does the SMCJ14C differ from the SMCJ14A variant?
The SMCJ14C and SMCJ14A share identical package, PPK, and thermal specs, but differ in VBR range: SMCJ14C is 15.6–19.1V, while SMCJ14A is tighter at 15.6–17.2V. Both have same VC = 23.2V at respective IPPM, but SMCJ14C's wider VBR reflects relaxed process control - offering cost advantage where clamping consistency is less critical than surge capacity.
Is the SMCJ14C suitable for bidirectional transient protection?
No - the SMCJ14C is unidirectional only. For bidirectional protection, select the SMCJ14CA variant, which uses symmetrical breakdown in both polarities and omits the cathode band marking. Using SMCJ14C in reverse-biased configurations risks permanent damage due to lack of reverse avalanche capability.
SMCJ14C 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:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14C FAQ
1.How can I place an order for SMCJ14C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14C 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 SMCJ14C reliable?
The price and inventory of SMCJ14C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14C is usually 5 days.
3.What payment methods are accepted for SMCJ14C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14C?
SMCJ14C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14C 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 SMCJ14C?
For technical support, including SMCJ14C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14C requirements.
6.How does Aetrix verify that SMCJ14C is sourced from the original manufacturer or authorized distributors?
All SMCJ14C 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 SMCJ14C meets industry standards.
7.What is the process for return or replacement of SMCJ14C?
All SMCJ14C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14C, 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 SMCJ14C part is unused and in its original packaging.
Return procedure for SMCJ14C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14C 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…
