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Taiwan Semiconductor Corporation 1.5SMC33CH
- Part No.:
- 1.5SMC33CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33CH.pdf
- Description:
- 1500W, 33V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,894
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Product details
Overview
1.5SMC33CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 33V working stand-off voltage (VWM), 29.7–36.3V breakdown voltage (VBR), 47.7V maximum clamping voltage (VC) at 33A peak impulse current, and 1500W peak pulse power rating per 10/1000μs waveform. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
For engineers reviewing the 1.5SMC33CH datasheet, 1.5SMC33CH pinout, 1.5SMC33CH application, or 1.5SMC33CH equivalent, key selection considerations include its bidirectional polarity, DO-214AB (SMC) package compatibility with automated SMT placement, sub-1ps response time, <1μA leakage above 26.8V, and suitability for ESD and load-switching transient suppression in automotive infotainment and body control modules.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1MΩ), but conducts heavily when transient voltage exceeds VBR, diverting surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across -55°C to +150°C operating range.
The device uses a single-die, bidirectional configuration-identical electrical behavior in both directions-enabling symmetric protection of AC-coupled or floating signal paths without polarity concerns. Thermal resistance values (RθJA = 50°C/W, RθJC = 15°C/W) support reliable power dissipation in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.8 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR min/max | 29.7 V / 36.3 V - Breakdown occurs within this band at 1mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 47.7 V at 33 A - Clamped voltage seen by protected circuit during worst-case 10/1000μs surge |
| PPK | 1500 W - Peak transient power it can absorb without failure (per standard IEC 61000-4-5 waveform) |
| IR @ VWM | <1 μA - Ensures negligible standby current draw in battery-powered or low-power systems |
| Response time | <1.0 ps - Enables effective suppression of fast-rising ESD events (e.g., IEC 61000-4-2 ±8kV contact discharge) |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and matte tin leads |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with cathode band marking for unidirectional variants; 1.5SMC33CH is bidirectional and marked with "ESJ" code only-no polarity band required. Leads are matte tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal serves as input/output; no fixed anode/cathode assignment-enables placement flexibility on differential or AC lines |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides thermal path to PCB copper and mechanical anchoring-requires adequate thermal pad for >1500W pulse handling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and cabin applications including temperature cycling, humidity, and mechanical shock |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line capacitance discharge) without degradation |
| Glass passivated junction | Ensures long-term stability of VBR and low IR drift over 10+ years in industrial environments |
| Moisture sensitivity level 1 | No floor life limitation or baking requirement before reflow-supports direct use from tape-and-reel packaging |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21, enabling use in green electronics manufacturing |
Applications
| Automotive Infotainment Power Rail | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting 12V supply inputs to head unit MCUs and audio amplifiers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient clamp placed upstream of LDO regulators and PMICs. Use Value: Limits voltage excursions to ≤47.7V during 1500W pulses, preventing latch-up or gate oxide damage in 28nm/40nm SoCs. |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042) against ESD and inductive kickback on vehicle chassis grounds. IC Role / Device Role / Timing Role: Bidirectional line protector on CAN_H/CAN_L differential pair. Use Value: Symmetric clamping ensures equal protection regardless of common-mode surge polarity-critical for fault-tolerant bus operation. |
| Telecom DSL Line Card | Smart Meter RS-485 Port |
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary-level surge arrestor mounted at board edge before transformer coupling. Use Value: Sub-1ps response captures fast-rising induced transients before they propagate into isolation transformers or PHY ICs. |
Use Scenario: Securing two-wire RS-485 communication between utility meter and concentrator against EFT and electrostatic discharge. IC Role / Device Role / Timing Role: Point-of-entry protector on A/B bus lines, paired with GDT or MOV for staged protection. Use Value: Low 1μA leakage preserves bus bias integrity and avoids false logic states in multi-drop networks with weak termination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA (Bourns) | Same DO-214AA (SMB) package; lower PPK (600W); higher VC (53.3V @ 12.3A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) | Select only if system-level surge testing confirms <600W requirements and space constraints favor SMB footprint |
| SMCJ33CA (Littelfuse) | Identical DO-214AB (SMC) package and 1500W rating; slightly higher VBR (31.4–34.7V) and VC (45.7V @ 34A) | Compatible drop-in replacement with tighter VBR tolerance and marginally better clamping | Preferred where tighter voltage matching and lower clamping are prioritized; verify marking and reel packaging compatibility |
Compared with 1.5SMC33CH, SMBJ33CA offers smaller size but reduced surge capability, while SMCJ33CA delivers identical form factor with improved clamping performance-making it the most direct functional alternative for automotive-grade designs requiring full ISO 7637-2 compliance.
Availability
1.5SMC33CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, telecom line cards, and smart metering platforms requiring stable component supply and AEC-Q101 assurance.
Supply support for 1.5SMC33CH 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 high-reliability protection devices, rectifiers, and power management components.
The 1.5SMCxxCH series was developed specifically for automotive and industrial applications demanding robust, AEC-Q101-qualified transient suppression in compact SMT packages-with emphasis on ISO 7637-2 compliance, low leakage, and stable parametric performance over temperature.
FAQ
What does the 'CH' suffix indicate in 1.5SMC33CH?
The 'CH' suffix denotes a bidirectional configuration with symmetrical clamping behavior in both polarities. Unlike unidirectional variants (e.g., 1.5SMC33H), the 1.5SMC33CH has no cathode band marking and provides identical VBR, VC, and IPPM characteristics whether voltage is applied positive-to-negative or negative-to-positive-ideal for protecting AC-coupled or floating signal lines such as CAN, RS-485, or Ethernet PHY interfaces.
Is 1.5SMC33CH compliant with AEC-Q101 and ISO 7637-2?
Yes, 1.5SMC33CH is fully AEC-Q101 qualified and certified to meet ISO 7637-2 test requirements for Pulses 1, 2a, 2b, 3a, and 3b. This validation covers standardized automotive transient waveforms including load dump (Pulse 1), supply interruption (Pulse 2a/2b), and capacitive coupling noise (Pulse 3a/3b), confirming its suitability for under-hood and cabin electronic modules.
What is the maximum clamping voltage of 1.5SMC33CH and at what current is it specified?
The maximum clamping voltage (VC) of 1.5SMC33CH is 47.7 V, measured at a peak impulse current (IPPM) of 33 A under the standard 10/1000 μs double-exponential surge waveform. This value represents the highest voltage that will appear across protected circuitry during a worst-case transient event, ensuring downstream components remain within safe operating limits.
How does the DO-214AB (SMC) package of 1.5SMC33CH compare to DO-214AA (SMB)?
The DO-214AB (SMC) package used by 1.5SMC33CH measures 7.11 × 6.22 mm-larger than DO-214AA (SMB) at 4.57 × 3.94 mm-enabling higher power handling (1500W vs. typically 600W). Its larger thermal mass and leadframe design support superior heat dissipation and surge robustness, making it preferred for automotive and industrial applications where energy levels exceed SMB ratings.
Can 1.5SMC33CH be used in place of unidirectional 1.5SMC33H in existing designs?
Yes, 1.5SMC33CH can replace unidirectional 1.5SMC33H in most cases, but layout review is essential: since 1.5SMC33CH lacks a cathode band, PCB silkscreen and assembly instructions must be updated to reflect bidirectional orientation. Electrical performance is otherwise compatible-same VWM (26.8V), VBR range (29.7–36.3V), and clamping (47.7V)-but polarity-sensitive circuits may require verification of signal integrity under reverse-bias conditions.
1.5SMC33CH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC33CH FAQ
1.How can I place an order for 1.5SMC33CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33CH 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 1.5SMC33CH reliable?
The price and inventory of 1.5SMC33CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC33CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33CH?
1.5SMC33CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33CH 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 1.5SMC33CH?
For technical support, including 1.5SMC33CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33CH requirements.
6.How does Aetrix verify that 1.5SMC33CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33CH 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 1.5SMC33CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC33CH?
All 1.5SMC33CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33CH, 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 1.5SMC33CH part is unused and in its original packaging.
Return procedure for 1.5SMC33CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33CH Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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