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Taiwan Semiconductor Corporation 1.5SMC33C
- Part No.:
- 1.5SMC33C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33C.pdf
- Description:
- 1500W, 33V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,021
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Product details
Overview
1.5SMC33C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 33V breakdown voltage (29.7–36.3V), 26.8V working stand-off voltage, and 47.7V clamping voltage at 33A peak pulse current - used to protect power rails and I/O lines in telecom and industrial power supplies.
For engineers reviewing the 1.5SMC33C datasheet, 1.5SMC33C pinout, 1.5SMC33C application, or 1.5SMC33C equivalent, key selection criteria include clamping performance under 10/1000μs surge, junction temperature limits up to +150°C, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and moisture sensitivity level 1 handling.
Technical Context
The 1.5SMC33C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (29.7–36.3V at 1mA test current), clamping transients to ≤47.7V at 33A. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at 26.8V).
Thermal design relies on RθJA = 50°C/W and RθJC = 15°C/W, supporting continuous operation from –55°C to +150°C ambient. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for SMT reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 29.7V / 36.3V - defines minimum and maximum voltage at which avalanche conduction begins reliably at 1mA |
| VWM | 26.8V - maximum DC or continuous AC voltage the device blocks without significant leakage |
| VC @ IPPM | 47.7V at 33A - peak clamped voltage during 10/1000μs surge, limiting downstream component stress |
| PPK | 1500W - peak pulse power handling per single 1ms transient, derated above 25°C ambient |
| IR @ VWM | <1μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - maximum junction temperature enabling use in enclosed or thermally constrained industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; terminals are anode (unmarked end) and cathode (banded end); designed for automated placement and reflow soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts forward surge only in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to higher-potential rail; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal cycling and humidity exposure |
| Fast response time <1.0ps | Clamps ESD and lightning-induced transients before sensitive ICs experience overvoltage damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive and industrial load-dump and coupling transient immunity per international standard |
| Moisture sensitivity level 1 | Enables direct placement without baking or dry-pack handling, reducing manufacturing overhead |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant production |
Applications
| Telecom Power Input Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protects 24V DC input rails of VoIP gateways and base station power modules from induced surges and load switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between input and ground, absorbing energy before it reaches DC-DC converters. Use Value: Limits voltage excursion to ≤47.7V during 10/1000μs 33A surge, preventing latch-up or burnout of upstream rectifiers and regulators. | Use Scenario: Shields digital input channels of programmable logic controllers from field-wiring transients caused by relay coil de-energization. IC Role / Device Role / Timing Role: Standoff protector across 24V sensor supply and return, activated only during overvoltage events. Use Value: Maintains <1μA leakage at 26.8V, avoiding false triggering of optocouplers or microcontroller inputs during normal operation. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Installed on LIN bus power lines in body control units to survive battery disconnect and jump-start pulses. IC Role / Device Role / Timing Role: Bidirectional-capable variant (C suffix) enables dual-rail protection without polarity constraints. Use Value: Withstands ISO 7637-2 Pulse 2b (inductive switch-off) up to 100V, clamping within safe margin for 3.3V/5V MCU interfaces. | Use Scenario: Mounted across H-bridge supply rails in washing machine motor drivers to suppress back-EMF spikes during PWM commutation. IC Role / Device Role / Timing Role: Energy-absorbing clamp parallel to bulk capacitor, diverting inductive kickback away from MOSFETs. Use Value: 1500W peak power rating handles repetitive 33A transients without degradation, extending system lifetime beyond 100,000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA (Bourns) | Same DO-214AA (SMB) package, bidirectional, 33V VBR, 49.9V VC @ 30.1A, 600W PPK | Lower peak power rating and smaller package limit energy absorption in high-surge environments | Select SMBJ33CA only where space is constrained and surge energy remains below 600W |
| 1.5KE33C (ON Semiconductor) | Through-hole DO-15 package, unidirectional, same 33V VBR, 53.3V VC @ 28.2A, 1500W PPK | Requires PCB through-hole mounting and reflow-incompatible assembly process | Choose 1.5KE33C only for legacy through-hole designs or prototyping with manual assembly |
Compared with SMBJ33CA and 1.5KE33C, the 1.5SMC33C delivers identical 1500W surge capability in a surface-mount DO-214AB package with tighter clamping (47.7V vs. 49.9V/53.3V), enabling robust protection for space-constrained industrial and telecom PCBs without sacrificing energy handling.
Availability
1.5SMC33C is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC I/O protection, automotive body control modules, and consumer appliance motor drive applications requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC33C 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, and power devices for industrial and automotive markets.
The 1.5SMC series was developed to deliver high-power, surface-mount transient suppression for harsh-environment applications where reliability, moisture resistance, and standardized SMT compatibility are critical.
FAQ
What is the clamping voltage of the 1.5SMC33C under a standard 10/1000μs surge?
The 1.5SMC33C has a maximum clamping voltage (VC) of 47.7V at 33A peak pulse current (IPPM) under the 10/1000μs waveform defined in IEC 61000-4-5 and ISO 7637-2. This value is measured at TA = 25°C and represents the upper bound of voltage seen by protected circuitry during worst-case transient events. The 1.5SMC33C maintains this clamping performance across its rated junction temperature range.
Is the 1.5SMC33C unidirectional or bidirectional?
The 1.5SMC33C is a unidirectional TVS diode, indicated by the "C" suffix per Taiwan Semiconductor's ordering convention - where "C" denotes unidirectional and "CA" denotes bidirectional variants. Its cathode band marks the terminal that must be connected toward the higher-potential side of the protected line. The 1.5SMC33C does not conduct or clamp in forward bias beyond its specified VF (~3.5V at 50A), unlike bidirectional types.
What is the maximum steady-state power dissipation for the 1.5SMC33C?
The 1.5SMC33C has a steady-state power dissipation (PD) rating of 6.5W at TA = 25°C, as specified in its Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency AC conditions - not transient surges. Derating is required above 25°C ambient per the pulse derating curve (Fig.2), with RθJA = 50°C/W defining thermal resistance to ambient air.
Does the 1.5SMC33C meet automotive transient immunity standards?
Yes, the 1.5SMC33C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (inductive switch-off), Pulse 3a (capacitive coupled noise), and Pulse 3b (supply line noise), making it suitable for automotive body electronics such as BCMs and lighting modules. Its 1500W peak power rating and fast <1.0ps response ensure reliable suppression of these standardized transients.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for the 1.5SMC33C?
The 1.5SMC33C is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and subjected to standard lead-free reflow profiles (peak 260°C) without preconditioning or baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB molding compound meets UL 94V-0 flammability requirements - confirming full compatibility with automated SMT assembly lines.
1.5SMC33C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC33C FAQ
1.How can I place an order for 1.5SMC33C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33C 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 1.5SMC33C reliable?
The price and inventory of 1.5SMC33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33C is usually 5 days.
3.What payment methods are accepted for 1.5SMC33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33C?
1.5SMC33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33C 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 1.5SMC33C?
For technical support, including 1.5SMC33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33C requirements.
6.How does Aetrix verify that 1.5SMC33C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33C 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 1.5SMC33C meets industry standards.
7.What is the process for return or replacement of 1.5SMC33C?
All 1.5SMC33C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33C, 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 1.5SMC33C part is unused and in its original packaging.
Return procedure for 1.5SMC33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33C Tags
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