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Taiwan Semiconductor Corporation SMCJ14AH
- Part No.:
- SMCJ14AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14AH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,861
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Product details
Overview
SMCJ14AH 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), 15.6–17.2V breakdown voltage (VBR), and 23.2V maximum clamping voltage (VC) at 67A peak pulse current. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ14AH datasheet, SMCJ14AH pinout, SMCJ14AH application, or SMCJ14AH equivalent, this page delivers verified electrical parameters, thermal performance data, clamping behavior under 10/1000μs surge, polarity marking, and RoHS/halogen-free compliance - all critical for automotive power rail and industrial I/O interface protection design.
Technical Context
The SMCJ14AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (15.6–17.2V @ 1mA). Its glass-passivated junction ensures stable breakdown and low leakage (<1μA @ 14V), while fast response (<1.0ps) enables effective suppression of ESD and switching transients.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting 150°C max junction temperature. It sustains 200A non-repetitive forward surge (8.3ms half-sine) and delivers 1500W peak pulse power (1ms, 10/1000μs waveform), with clamping voltage tightly controlled at 23.2V @ 67A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC bias margin. |
| VBR min/max | 15.6 / 17.2 V @ 1 mA - Verified avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 23.2 V @ 67 A - Clamped voltage during 10/1000μs surge; determines protected circuit's maximum transient stress. |
| PPK | 1500 W - Peak pulse power handling per single 1ms event; supports ISO 7637-2 Pulse 5a load-dump immunity. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off; avoids signal path loading in high-impedance interfaces. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| RθJA | 55 °C/W - Thermal resistance to ambient; informs PCB copper area requirements for sustained 5W steady-state dissipation. |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 12V rail); voltage clamps to ≤23.2V when transients exceed VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan. |
| Glass passivated junction | Ensures stable VBR over time and humidity exposure; eliminates parameter drift in harsh industrial environments. |
| ISO 7637-2 compliance | Guarantees protection against real-world automotive transients: Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump), Pulse 3a/3b (capacitive coupling). |
| Fast response time | <1.0 ps rise-to-VBR enables sub-nanosecond clamping - critical for safeguarding CAN, LIN, and sensor interfaces. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive; supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body control modules, and lighting drivers from load-dump spikes up to 35V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges before they reach LDOs or microcontrollers. Use Value: Limits transient voltage to ≤23.2V, preserving downstream ICs rated for 28V absolute maximum, with no additional series impedance required. | Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) on PLC I/O cards from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point, shunting fast transients (<1ns) directly to chassis ground. Use Value: Sub-1μA leakage avoids measurement offset in µA-level sensor current loops; 23.2V clamping prevents ADC input saturation. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power rails and PoE injectors against lightning-induced surges per IEC 61000-4-5 Level 3 (1kV/2kV). IC Role / Device Role / Timing Role: Primary surge clamp on +3.3V/+5V supply lines feeding communication ICs; coordinated with upstream GDT or MOV. Use Value: 1500W peak power rating handles multi-kA induced currents; DO-214AB footprint allows dense layout near connectors. | Use Scenario: Input-stage transient suppression on AC-DC adapter primary-side DC bus (e.g., post-bridge rectifier, pre-PFC stage). IC Role / Device Role / Timing Role: Unidirectional clamp referenced to bulk capacitor ground, absorbing switching noise and line surges. Use Value: 14V VWM aligns with 12V nominal bus; 23.2V VC ensures MOSFET gate drivers and controller ICs remain within safe operating area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Lower PPK (400W), smaller SMA package, higher VC (24.4V @ 25.5A) | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD or IEC 61000-4-2. | Select SMCJ14AH where 1500W surge capability and automotive qualification are mandatory. |
| TPSMD14A | Same PPK (1500W), identical DO-214AB package, but VBR range 15.6–17.8V and VC = 23.2V @ 67A - matches SMCJ14AH closely. | Also AEC-Q101 qualified and ISO 7637-2 compliant; differs only in minor leakage and thermal resistance specs. | TPSMD14A is a functionally aligned alternative with comparable clamping and qualification; verify board-level thermal layout compatibility. |
Compared with SMAJ14A, SMCJ14AH delivers >2.7× higher surge energy handling and automotive-grade validation; versus TPSMD14A, it offers nearly identical clamping and qualification, differing mainly in manufacturer-specific process control and traceability documentation.
Availability
SMCJ14AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom line card designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMCJ14AH 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 certification capabilities.
The SMCJ14AH belongs to TSC's high-power SMCJ(A)H family, engineered specifically for robust transient suppression in automotive and industrial systems where ISO 7637-2 and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ14AH and how is it measured?
The SMCJ14AH has a maximum clamping voltage (VC) of 23.2 V, measured at 67 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform per Fig.5 in the datasheet. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring protected components remain within their absolute maximum ratings.
Is SMCJ14AH unidirectional or bidirectional, and how is polarity identified?
The SMCJ14AH is a unidirectional TVS diode. Polarity is marked by a cathode band on the DO-214AB package body - the banded end connects to the protected line (e.g., 12V rail), while the anode connects to ground. Bidirectional variants use "CH" or "CAH" suffixes; SMCJ14AH does not support symmetrical clamping in both directions.
Does SMCJ14AH meet automotive qualification standards?
Yes, SMCJ14AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction - glass-passivated junction, moisture sensitivity level 1, and halogen-free molding compound - satisfies automotive reliability and environmental mandates.
What is the maximum steady-state power dissipation for SMCJ14AH?
The SMCJ14AH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C. This value applies to continuous DC or low-frequency reverse-bias conditions and must be derated linearly above 25°C using the specified thermal resistance (RθJA = 55°C/W) to avoid exceeding the 150°C maximum junction temperature.
How does SMCJ14AH differ from SMCJ14H?
The SMCJ14AH has a tighter breakdown voltage range (15.6–17.2 V) compared to SMCJ14H (15.6–19.1 V), resulting in more consistent clamping behavior and lower parametric spread. Both share identical VWM (14 V), VC (23.2 V / 25.8 V), and PPK (1500 W), but SMCJ14AH is optimized for applications demanding tighter VBR tolerance and improved lot-to-lot stability.
SMCJ14AH 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:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 67A
- 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)
SMCJ14AH FAQ
1.How can I place an order for SMCJ14AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14AH 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 SMCJ14AH reliable?
The price and inventory of SMCJ14AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14AH is usually 5 days.
3.What payment methods are accepted for SMCJ14AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14AH?
SMCJ14AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14AH 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 SMCJ14AH?
For technical support, including SMCJ14AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14AH requirements.
6.How does Aetrix verify that SMCJ14AH is sourced from the original manufacturer or authorized distributors?
All SMCJ14AH 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 SMCJ14AH meets industry standards.
7.What is the process for return or replacement of SMCJ14AH?
All SMCJ14AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14AH, 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 SMCJ14AH part is unused and in its original packaging.
Return procedure for SMCJ14AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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