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Taiwan Semiconductor Corporation 1.5SMC120H
- Part No.:
- 1.5SMC120H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120H.pdf
- Description:
- 1500W, 120V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,973
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Product details
Overview
1.5SMC120H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It delivers 1500W peak pulse power, 108–132V breakdown voltage (VBR), 97.2V working stand-off voltage (VWM), and clamps transients to ≤173V at 9.1A peak impulse current - used in automotive power supply rail protection and industrial I/O port hardening.
For engineers reviewing the 1.5SMC120H datasheet, 1.5SMC120H pinout, 1.5SMC120H application, or 1.5SMC120H equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
This TVS operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) and low leakage (<1 µA at 97.2V). Its DO-214AB (SMC) package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation up to TJ = 150°C. The device sustains 200A non-repetitive forward surge (IFSM) and exhibits a VBR temperature coefficient of 0.107%/°C - critical for stable clamping across automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 108 V / 132 V - defines minimum voltage at which avalanche conduction begins under 1 mA test current; ensures robust overvoltage threshold before clamping |
| VWM | 97.2 V - maximum continuous reverse operating voltage; must exceed system nominal voltage (e.g., 24V or 48V rails) with safety margin |
| VC@IPPM | ≤173 V at 9.1 A - clamping voltage during 10/1000 µs surge; determines maximum stress on downstream components |
| PPK | 1500 W - peak pulse power handling per ISO 7637-2 Pulse 5a; enables protection against load-dump transients |
| IR@VWM | ≤1 µA - ultra-low reverse leakage ensures minimal power loss and no interference with high-impedance sensing circuits |
| TJ max | +150 °C - junction temperature limit; supports under-hood automotive applications with sustained high-ambient exposure |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.3 mm height; compatible with standard SMT reflow profiles |
Pinout & Package
DO-214AB (SMC) package with two terminals: Cathode (marked band) and Anode. Designed for unidirectional suppression only; polarity must be observed during PCB layout to ensure correct biasing and clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path / reference node | Connected to protected line (e.g., +12V rail); conducts avalanche current to ground when VLINE exceeds VBR |
| Anode | Ground reference / common return | Connected to system ground plane; completes current path during transient events; must maintain low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - suitable for under-hood ECUs and ADAS modules |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - covers full automotive EMC immunity scope |
| Fast response time | <1.0 ps - enables clamping before sensitive downstream ICs (e.g., CAN transceivers, microcontrollers) experience overvoltage damage |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before SMT assembly - simplifies manufacturing and reduces handling cost |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure - improves field lifetime in harsh environments |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24V/48V battery-fed control modules from load dump and alternator surge events per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground; clamps transients within nanoseconds to prevent latch-up or burnout of PMICs and MCU power supplies. Use Value: Limits peak voltage to ≤173V during 1500W surges, preserving integrity of 36V-rated input stages without derating or oversized capacitors. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to field wiring transients and ESD. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel; absorbs induced surges from relay coil switching and cable coupling. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) while maintaining <1 µA leakage to avoid false triggering of optocoupler-based inputs. |
| Telecom DC Power Feeds | Motor Drive Control Signal Lines |
Use Scenario: Hardening -48V telecom power distribution boards against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary protection stage before DC-DC converters; shunts energy away from upstream rectifiers and downstream regulators. Use Value: Withstands repeated 10/1000 µs surges up to 9.1A without degradation, supporting >100,000 surge cycles in central office deployments. |
Use Scenario: Protecting isolated gate drive signals (e.g., PWM to IGBTs) from cross-talk and ground bounce in variable-frequency drives. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal paths between controller and isolation barrier; suppresses fast-rising edge transients without distorting timing. Use Value: Clamps sub-100 ns spikes to safe levels while adding <1 pF parasitic capacitance - preserves signal integrity for 100 kHz+ PWM frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Lower PPK = 600W; same VBR range but higher VC = 193V at 3.1A; SMB package (smaller footprint, lower thermal mass) | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients like ESD and EFT | Select only if system surge energy is ≤600W and board space is constrained; verify thermal dissipation with RθJA = 85°C/W |
| 1.5KE120A | Through-hole TO-204AA (DO-41); PPK = 1500W; VC = 185V at 8.1A; slower response (~1 ns); no AEC-Q101 qualification | Requires manual or wave soldering; unsuitable for automotive production; lacks moisture sensitivity level 1 rating | Use only for prototyping or non-automotive industrial applications where SMT is unavailable or thermal cycling is not required |
Compared with SMBJ120A and 1.5KE120A, the 1.5SMC120H provides superior automotive qualification, tighter clamping (173V vs. ≥185V), and surface-mount compatibility - making it the preferred choice for volume production of AEC-Q101-compliant systems requiring full ISO 7637-2 immunity.
Availability
1.5SMC120H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power distribution systems requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC120H 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers - with global ISO/TS 16949 and AEC-Q200 certified production lines.
The 1.5SMC series was engineered specifically for high-reliability automotive and industrial surge protection, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in compact SMC packages.
FAQ
What is the maximum clamping voltage of the 1.5SMC120H under standard test conditions?
The 1.5SMC120H has a maximum clamping voltage (VC) of 173 V when subjected to a 10/1000 µs waveform peak impulse current (IPPM) of 9.1 A at TA = 25°C. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC120H suitable for bidirectional transient suppression?
No, the 1.5SMC120H is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the protected line, anode to ground. For bidirectional applications, select the 1.5SMC120AH variant (marked GEJ), which provides symmetrical clamping in both directions and is rated for the same VBR and PPK specifications.
Does the 1.5SMC120H meet automotive qualification standards?
Yes, the 1.5SMC120H is AEC-Q101 qualified and tested for automotive-grade reliability, including temperature cycling, highly accelerated stress testing (HAST), and mechanical shock. It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b - making it suitable for engine control modules, body electronics, and ADAS subsystems.
What is the leakage current specification for the 1.5SMC120H at its working stand-off voltage?
The 1.5SMC120H exhibits a maximum blocking leakage current (IR) of 1 µA at its working stand-off voltage (VWM) of 97.2 V and TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance monitoring circuits such as those found in battery management or sensor front-ends.
How does thermal derating affect the 1.5SMC120H's peak pulse power capability above 25°C?
The 1.5SMC120H's peak pulse power (PPK) is derated linearly above TA = 25°C per Figure 2 in the datasheet, with RθJA = 50°C/W. At 85°C ambient, PPK drops to approximately 1050W - meaning design margins must account for reduced surge-handling capacity in high-temperature enclosures like under-hood automotive modules or sealed industrial cabinets.
1.5SMC120H 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):
- 97.2V
- Voltage - Breakdown (Min):
- 108V
- Voltage - Clamping (Max) @ Ipp:
- 173V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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)
1.5SMC120H FAQ
1.How can I place an order for 1.5SMC120H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120H 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 1.5SMC120H reliable?
The price and inventory of 1.5SMC120H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120H is usually 5 days.
3.What payment methods are accepted for 1.5SMC120H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120H?
1.5SMC120H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120H 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 1.5SMC120H?
For technical support, including 1.5SMC120H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120H requirements.
6.How does Aetrix verify that 1.5SMC120H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120H 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 1.5SMC120H meets industry standards.
7.What is the process for return or replacement of 1.5SMC120H?
All 1.5SMC120H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120H, 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 1.5SMC120H part is unused and in its original packaging.
Return procedure for 1.5SMC120H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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