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Taiwan Semiconductor Corporation SMCJ12H
- Part No.:
- SMCJ12H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12H.pdf
- Description:
- 1500W, 14.8V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:9,864
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Product details
Overview
SMCJ12H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 12V working stand-off voltage (VWM), 13.3–16.3V breakdown voltage (VBR), and 22.0V maximum clamping voltage (VC) at 71A peak pulse current. It provides robust ESD and surge protection for automotive power rails and industrial I/O interfaces.
For engineers reviewing the SMCJ12H datasheet, SMCJ12H pinout, SMCJ12H application, or SMCJ12H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification status, junction temperature range (–55°C to +150°C), and unidirectional polarity marking on DO-214AB package.
Technical Context
The SMCJ12H is a glass-passivated, single-die unidirectional TVS diode optimized for fast transient suppression in automotive and industrial environments. Its sub-1.0ps response time ensures clamping before sensitive downstream circuitry is exposed, while its 1500W peak pulse power rating supports high-energy surges per IEC 61000-4-5 and ISO 7637-2 standards.
Designed for surface-mount assembly and AEC-Q101 qualified, the device operates across –55°C to +150°C junction temperature and features <1μA reverse leakage at 12V (VWM), enabling low-power standby compatibility. Its DO-214AB package delivers 10°C/W junction-to-case thermal resistance for reliable power dissipation during repetitive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 13.3 V / 16.3 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 22.0 V - Clamped voltage seen by protected circuit at 71 A peak impulse current (10/1000 µs waveform) |
| PPK | 1500 W - Peak pulse power handling capability under standardized 1 ms surge conditions |
| IR @ VWM | <1 µA - Minimal leakage current at rated stand-off voltage, preserving low-power system integrity |
| TJ max | +150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 0.210 g mass and J-STD-002 solderability |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, UL 94V-0 flammability rating, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; supports J-STD-020 Level 1 MSL |
| Fast response time | <1.0 ps rise time from 0 V to VBR min ensures clamping activation before IC damage thresholds are exceeded |
| Low clamping ratio | VC/VWM = 22.0/12 ≈ 1.83 - Tight ratio minimizes overvoltage stress on protected components |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a/5b. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 12V. Use Value: Limits voltage excursion to ≤22.0V during 71A transients, preventing damage to LDOs, microcontrollers, and CAN transceivers. | Use Scenario: Shielding 24V digital input modules in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point to shunt energy before signal conditioning circuitry. Use Value: Withstands repeated 1500W pulses without degradation, maintaining <1µA leakage to preserve input threshold accuracy. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered equipment DC inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48V DC supply line, coordinated with secondary-stage MOVs and filters. Use Value: Sub-1ps response captures fast-rising edge of induced surges, reducing let-through energy to downstream DC-DC converters. | Use Scenario: Suppressing commutation spikes from brushed DC motors in home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Reverse-biased clamp across motor terminals to absorb inductive kickback during MOSFET switching. Use Value: 200A peak forward surge rating (IFSM) accommodates repeated motor startup currents without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600W peak power rating (vs. 1500W); SMB package (smaller footprint, higher RθJA = 75°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current load dump | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| 1.5KE12A | Through-hole DO-201 package; same 1500W rating but slower response (>1ns) and no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive under-hood use due to leaded construction and thermal limitations | Prefer for legacy through-hole designs where rework flexibility outweighs AEC compliance needs |
Compared with SMBJ12A and 1.5KE12A, the SMCJ12H delivers superior surge robustness in automotive-grade SMT form factor-enabling direct integration into AEC-compliant ECUs without derating or layout compromise.
Availability
SMCJ12H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and consistent DO-214AB packaging.
Supply support for SMCJ12H 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 consumer markets since 1979.
The SMCJ series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in harsh-environment applications including engine control units, body electronics, and factory automation I/O modules.
FAQ
What is the clamping voltage of SMCJ12H at its rated peak pulse current?
The SMCJ12H has a maximum clamping voltage (VC) of 22.0 V at 71 A peak pulse current (IPPM), measured using the standard 10/1000 µs double-exponential waveform. This value ensures protected circuitry remains below critical overvoltage thresholds during ISO 7637-2 Pulse 2b and Pulse 3b events. The SMCJ12H maintains this clamping performance across its full operating temperature range.
Is SMCJ12H unidirectional or bidirectional, and how is polarity identified?
The SMCJ12H is a unidirectional TVS diode, indicated by its "H" suffix and absence of "CH" or "CAH" designation. Polarity is marked by a cathode band on the DO-214AB package body-this band must be oriented toward the protected line (e.g., 12V rail), while the anode connects to ground. Bidirectional variants require explicit CH/CAH suffixes per TSC's ordering code convention.
Does SMCJ12H meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ12H is explicitly AEC-Q101 qualified per the provided datasheet (Version A2102). It has undergone stress testing including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D. This qualification confirms suitability for automotive powertrain, chassis, and body electronics where reliability under thermal and vibration stress is mandatory.
What is the maximum reverse leakage current for SMCJ12H at its working voltage?
The SMCJ12H exhibits a maximum reverse leakage current (IR) of less than 1 µA when biased at its 12 V working stand-off voltage (VWM), tested at TA = 25°C. This ultra-low leakage preserves battery life in always-on automotive modules and prevents false triggering in high-impedance sensing circuits. The SMCJ12H maintains IR < 5 µA up to 150°C junction temperature.
Can SMCJ12H be used in bidirectional surge protection applications?
No-SMCJ12H is strictly unidirectional and not rated for reverse conduction. For bidirectional protection, TSC specifies variants with "CH" or "CAH" suffixes (e.g., SMCJ12CH), which feature symmetrical breakdown in both polarities. Using SMCJ12H in bidirectional configurations risks catastrophic failure during negative transients, as it lacks reverse breakdown capability beyond its specified VWM.
SMCJ12H 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SMCJ12H FAQ
1.How can I place an order for SMCJ12H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12H 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 SMCJ12H reliable?
The price and inventory of SMCJ12H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ12H is usually 5 days.
3.What payment methods are accepted for SMCJ12H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12H?
SMCJ12H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12H 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 SMCJ12H?
For technical support, including SMCJ12H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12H requirements.
6.How does Aetrix verify that SMCJ12H is sourced from the original manufacturer or authorized distributors?
All SMCJ12H 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 SMCJ12H meets industry standards.
7.What is the process for return or replacement of SMCJ12H?
All SMCJ12H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12H, 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 SMCJ12H part is unused and in its original packaging.
Return procedure for SMCJ12H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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