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Taiwan Semiconductor Corporation 1.5SMC30AH
- Part No.:
- 1.5SMC30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30AH.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
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Product details
Overview
1.5SMC30AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 30V breakdown voltage (28.5–31.5V), and 41.4V maximum clamping voltage at 38A peak impulse current. It protects automotive and industrial power rails against ESD, lightning surges, and load-switching transients.
For engineers reviewing the 1.5SMC30AH datasheet, 1.5SMC30AH pinout, 1.5SMC30AH application, or 1.5SMC30AH equivalent, this device offers AEC-Q101 qualification, <1.0ps response time, <1μA leakage above 25.6V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and glass-passivated junction reliability for high-reliability DC power line protection.
Technical Context
The 1.5SMC30AH operates as a unidirectional avalanche clamp, with cathode-marked polarity and a single-die DO-214AB construction. Its 28.5–31.5V breakdown range is tested at 1mA, and it delivers 41.4V clamping at 38A (10/1000μs waveform), enabling robust overvoltage suppression on 24V systems.
Thermal performance includes 15°C/W junction-to-case and 50°C/W junction-to-ambient resistance, supporting continuous operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, ensuring compatibility with standard SMT reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 28.5V / 31.5V - Ensures reliable turn-on before damage to downstream 24V-rated ICs or MOSFETs |
| VWM | 25.6V - Maximum continuous reverse working voltage; sets safe operating margin below VBR |
| VC @ IPPM | 41.4V at 38A - Clamping level limits transient overshoot to protect 42V-tolerant components |
| PPK | 1500W - Handles high-energy transients per ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b |
| IR @ VWM | <1μA - Negligible standby leakage, critical for low-power always-on circuits |
| TJ Max | +150°C - Enables use in under-hood automotive environments and enclosed industrial enclosures |
| Response Time | <1.0ps - Faster than most semiconductor switching events, ensuring clamping precedes device failure |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded epoxy case with matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance return plane; must handle 38A surge without trace fusing |
| Cathode | Protected line connection | Connected to 24V rail or signal line; marked with band; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements (HTOL, TCT, ESD, etc.) |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Guarantees survivability against standardized automotive transients including load dump (Pulse 5a/b) and coupling noise (Pulse 1/2a/2b) |
| Fast response <1.0ps | Clamps before voltage rise exceeds safe thresholds of sensitive gate drivers or microcontroller I/O pins |
| Moisture sensitivity Level 1 | Eliminates need for dry-packaging or baking prior to SMT assembly, reducing manufacturing cost and risk |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units (ECUs) and body control modules (BCMs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and point-of-load regulator input. Use Value: Limits transient voltage to ≤41.4V, preventing latch-up or gate oxide rupture in downstream DC-DC controllers rated for 42V max input. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end protection element on 24V optocoupler input circuitry. Use Value: Absorbs 1500W pulses without degradation, maintaining signal integrity and eliminating false triggering during electromagnetic interference events. |
| Telecom Power Feeds | Renewable Energy Charge Controllers |
Use Scenario: Safeguarding PoE-powered remote radio units and base station backhaul interfaces from induced lightning surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24–48V DC feed lines entering outdoor enclosures. Use Value: Withstands repeated 10/1000μs transients up to 38A while maintaining sub-μA leakage, preserving system efficiency and uptime. | Use Scenario: Protecting MPPT charge controller inputs connected to solar panel strings exposed to lightning-prone rural installations. IC Role / Device Role / Timing Role: Bidirectional-capable variant support (via CAH suffix) enables symmetrical clamping across floating PV+ and PV− lines. Use Value: Though 1.5SMC30AH is unidirectional, its 28.5–31.5V VBR aligns with 30V nominal PV string configurations, enabling precise overvoltage cutoff before panel bypass diode activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | 600W rating, DO-214AA (SMB) package, 48.4V clamping at 12.3A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5 (load dump) | Select when space-constrained layouts require smaller SMB footprint and surge energy is ≤600W |
| 1.5KE30A | Through-hole TO-204AE (DO-41), 1500W, 48.4V clamping at 31A | Not AEC-Q101 qualified; lacks automotive-grade reliability testing and moisture sensitivity certification | Choose for cost-sensitive industrial prototypes where automated SMT is not required and automotive qualification is unnecessary |
Compared with SMBJ30A and 1.5KE30A, the 1.5SMC30AH uniquely combines AEC-Q101 qualification, 1500W capability in a surface-mount DO-214AB package, and verified ISO 7637-2 compliance-making it the preferred choice for production automotive and high-reliability industrial designs requiring zero layout change for upgrade paths.
Availability
1.5SMC30AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power feeds, and renewable energy charge controllers requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC30AH 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 1.5SMC series was engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 reliability, fast clamping response, and robust thermal performance in compact SMD packages.
FAQ
What is the clamping voltage of the 1.5SMC30AH under standard 10/1000μs surge conditions?
The 1.5SMC30AH has a maximum clamping voltage (VC) of 41.4V at 38A peak impulse current (IPPM) under the standardized 10/1000μs double-exponential waveform. This value is guaranteed across temperature and process variation, and ensures protected circuits remain within safe operating limits during ISO 7637-2 Pulse 1 and Pulse 2b events. The 1.5SMC30AH achieves this clamping performance while maintaining sub-μA leakage at its 25.6V working stand-off voltage.
Is the 1.5SMC30AH suitable for bidirectional transient protection?
No-the 1.5SMC30AH is a unidirectional TVS diode, designed for protection of DC power rails where polarity is fixed. For bidirectional applications such as AC lines or differential data buses, Taiwan Semiconductor specifies the 1.5SMC30CAH variant (with "CAH" suffix), which provides symmetrical clamping in both directions. Using the 1.5SMC30AH in reverse-biased configurations risks permanent breakdown, as its anode-cathode structure is optimized only for forward conduction during clamping.
Does the 1.5SMC30AH meet AEC-Q101 requirements for automotive use?
Yes-the 1.5SMC30AH is explicitly AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), electrostatic discharge (HBM/MM), and mechanical shock/vibration per the AEC-Q101 standard. This qualification confirms suitability for automotive powertrain, chassis, and body electronics applications where reliability under harsh environmental conditions is mandatory. The 1.5SMC30AH also complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, further validating its automotive readiness.
What is the thermal resistance profile of the 1.5SMC30AH, and how does it affect PCB layout?
The 1.5SMC30AH has a junction-to-case thermal resistance (RθJC) of 15°C/W and junction-to-ambient resistance (RθJA) of 50°C/W under standard JEDEC test conditions. To maintain TJ ≤150°C during repetitive surges, PCB layout must include ≥25 mm² of 1-oz copper connected to both terminals-especially the cathode-to act as a heat spreader. Insufficient copper area will cause RθJA to exceed 50°C/W, risking thermal runaway during sustained transient activity. The 1.5SMC30AH's DO-214AB package supports this via its large solderable tab area.
How does the 1.5SMC30AH compare to the 1.5SMC30H in terms of breakdown voltage tolerance?
The 1.5SMC30AH has a tighter breakdown voltage tolerance: 28.5V to 31.5V (±5%) at 1mA test current, whereas the 1.5SMC30H spans 27.0V to 33.0V (±10%). This narrower distribution improves design margin predictability in safety-critical applications-for example, ensuring clamping initiates reliably before 31.5V in a 24V system with ±10% regulation. Both share identical 1500W rating, 41.4V/43.5V clamping, and DO-214AB packaging, but the 1.5SMC30AH's tighter VBR makes it preferable for precision overvoltage cutoff schemes.
1.5SMC30AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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)
1.5SMC30AH FAQ
1.How can I place an order for 1.5SMC30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30AH 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 1.5SMC30AH reliable?
The price and inventory of 1.5SMC30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30AH?
1.5SMC30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30AH 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 1.5SMC30AH?
For technical support, including 1.5SMC30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30AH requirements.
6.How does Aetrix verify that 1.5SMC30AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30AH 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 1.5SMC30AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC30AH?
All 1.5SMC30AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30AH, 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 1.5SMC30AH part is unused and in its original packaging.
Return procedure for 1.5SMC30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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