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Taiwan Semiconductor Corporation SMCJ30H
- Part No.:
- SMCJ30H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30H.pdf
- Description:
- 1500W, 37V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,643
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Product details
Overview
SMCJ30H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 33.3V minimum breakdown voltage (VBR), 30V working stand-off voltage (VWM), and 53.5V maximum clamping voltage (VC) at 29A peak pulse current - designed for automotive-grade ESD and load-switching surge protection in power rails and I/O lines.
For engineers reviewing the SMCJ30H datasheet, SMCJ30H pinout, SMCJ30H application, or SMCJ30H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, ISO 7637-2 compliance, thermal resistance values (RθJA = 55°C/W), and real-world clamping performance under 10/1000μs transients.
Technical Context
The SMCJ30H employs a glass-passivated silicon junction optimized for fast response (<1.0 ps rise time from 0 V to VBR min) and low leakage (<1 μA at 30 V). Its unidirectional configuration provides asymmetric clamping - forward conduction only during reverse overvoltage events - making it suitable for DC power line protection where polarity is fixed.
Thermally, it features RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, supporting lead-free reflow assembly without popcorn risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 33.3 V / 40.7 V @ 1 mA - Ensures predictable turn-on margin above VWM with ±11% tolerance |
| VC @ IPPM | 53.5 V @ 29 A - Limits downstream voltage stress during 10/1000μs surge per IEC 61000-4-5 |
| PPK | 1500 W - Peak pulse power handling capability for short-duration transients |
| IR @ VWM | <1 μA - Negligible standby leakage, critical for battery-backed or low-power systems |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| RθJA | 55 °C/W - Defines PCB thermal design requirement: ≥250 mm² 2-oz copper pad needed for full 1500W rating at 25°C ambient |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; dual-leaded, gull-wing geometry; matte tin-plated terminals compliant with J-STD-002 solderability; 0.210 g typical weight; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 30V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime; eliminates surface contamination sensitivity |
| Fast response time | <1.0 ps from 0 V to VBR min - faster than most microcontroller I/O protection needs |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V/30V supply inputs in body control modules against load-dump spikes and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to clamp surges exceeding 30V. Use Value: Limits peak voltage to ≤53.5V during 10/1000μs 29A surge, preventing damage to downstream DC-DC converters and MCU power supplies. | Use Scenario: Safeguarding analog input channels (e.g., 4–20 mA sensors) from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal conditioning PCB, mounted adjacent to connector. Use Value: Sub-1ps response ensures clamping occurs before sensitive op-amps or ADCs experience overvoltage stress. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Supply |
Use Scenario: Securing PoE-powered device DC inputs (e.g., IP cameras) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC isolation and filtering. Use Value: 1500W peak power rating handles high-energy transients while maintaining <1μA leakage at nominal 30V operation. | Use Scenario: Protecting BLDC motor driver VDD rails from commutation-induced voltage spikes in smart home appliances. IC Role / Device Role / Timing Role: Clamp device across bulk capacitor on gate driver supply rail. Use Value: 53.5V clamping voltage prevents overvoltage shutdown of half-bridge drivers rated for 60V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | 600W rating, SMA package (smaller footprint), higher RθJA (~85°C/W), VC = 48.4V @ 12.3A | Lower power handling limits use to sub-1kW surge environments; less robust for ISO 7637-2 Pulse 1 | Select when board space is constrained and peak surge energy is ≤600W; verify thermal derating at elevated ambient. |
| 1.5KE30A | Through-hole DO-201 package, 1500W rating, VC = 48.4V @ 31A, slower response (~1ns), no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive under-hood use; requires wave solder or hand-soldering | Choose for legacy through-hole designs or cost-sensitive industrial applications where AEC-Q101 is not required. |
Compared with SMAJ30A and 1.5KE30A, the SMCJ30H offers superior surge robustness in surface-mount form factor, guaranteed AEC-Q101 reliability, and tighter thermal management via lower RθJA, making it optimal for next-generation automotive and industrial SMT platforms requiring high-reliability transient immunity.
Availability
SMCJ30H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O safeguarding, and telecom DC interface surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ30H 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 power management devices.
The SMCJ series belongs to TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for automotive and industrial applications demanding high-energy clamping, fast response, and long-term reliability under harsh thermal and electrical stress.
FAQ
What is the clamping voltage of the SMCJ30H under standard 10/1000μs surge conditions?
The SMCJ30H has a maximum clamping voltage (VC) of 53.5 V at 29 A peak pulse current (IPPM) under the standardized 10/1000μs double-exponential waveform defined in IEC 61000-4-5. This value is measured with the device mounted on a standard JEDEC test board and represents worst-case voltage seen by downstream circuitry during surge events.
Is the SMCJ30H suitable for bidirectional transient protection?
No - the SMCJ30H is a unidirectional TVS diode, intended for DC circuits with fixed polarity. For bidirectional protection, Taiwan Semiconductor offers the SMCJ30CH variant (with CH suffix), which provides symmetrical clamping in both directions and uses the same DO-214AB package but different internal die configuration.
Does the SMCJ30H meet automotive qualification standards?
Yes, the SMCJ30H is AEC-Q101 qualified and tested per the full stress test schedule including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model ESD (HBM ≥ 8 kV). It also complies with ISO 7637-2 for automotive transient immunity.
What is the maximum steady-state power dissipation for the SMCJ30H?
The SMCJ30H has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C. This value applies only to continuous DC or low-frequency reverse-bias conditions - not transient events. Derating is required above 25°C ambient per the published thermal curve (Fig.2 in datasheet).
How does the SMCJ30H compare to the SMCJ30AH variant?
The SMCJ30AH has tighter VBR tolerance (33.3–36.8 V vs. 33.3–40.7 V for SMCJ30H), lower clamping voltage (48.4 V vs. 53.5 V), and identical packaging and ratings. The SMCJ30H offers broader voltage spread for cost-sensitive applications where precise clamping threshold is less critical than absolute surge energy handling.
SMCJ30H 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
SMCJ30H FAQ
1.How can I place an order for SMCJ30H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30H 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 SMCJ30H reliable?
The price and inventory of SMCJ30H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ30H is usually 5 days.
3.What payment methods are accepted for SMCJ30H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30H?
SMCJ30H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30H 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 SMCJ30H?
For technical support, including SMCJ30H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30H requirements.
6.How does Aetrix verify that SMCJ30H is sourced from the original manufacturer or authorized distributors?
All SMCJ30H 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 SMCJ30H meets industry standards.
7.What is the process for return or replacement of SMCJ30H?
All SMCJ30H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30H, 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 SMCJ30H part is unused and in its original packaging.
Return procedure for SMCJ30H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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