My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC6.8C
- Part No.:
- 1.5SMC6.8C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8C.pdf
- Description:
- 1500W, 6.8V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,031
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC6.8C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 6.12–7.48 V at 10 mA, working stand-off voltage 5.5 V, clamping voltage 10.8 V at 145 A peak pulse current, and junction temperature range −55 °C to +150 °C. It protects telecom line interfaces against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC6.8C datasheet, 1.5SMC6.8C pinout, 1.5SMC6.8C application, or 1.5SMC6.8C equivalent, this page delivers verified electrical specs, thermal performance data, bidirectional variant clarification, and real-world protection use cases for industrial and consumer electronics design.
Technical Context
The 1.5SMC6.8C is a glass-passivated, single-die unidirectional TVS diode optimized for fast clamping response (<1.0 ps) and low leakage (<1000 µA at 5.5 V). Its 1500 W peak pulse power rating per 1 ms waveform meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements for automotive and industrial surge immunity.
Thermal design is supported by RθJA = 50 °C/W and RθJC = 15 °C/W, enabling reliable operation up to 150 °C junction temperature. The device uses a standard cathode-banded DO-214AB package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.12 V / 7.48 V at 10 mA - defines minimum and maximum guaranteed breakdown threshold under standardized test conditions |
| VWM | 5.5 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 10.8 V at 145 A - clamping voltage during worst-case 1 ms transient, limiting downstream IC stress |
| PPK | 1500 W - peak pulse power handling capability per 1 ms waveform, critical for lightning surge compliance |
| IR @ VWM | 1000 µA - maximum blocking leakage at rated stand-off voltage, ensuring minimal standby power loss |
| TJ max | +150 °C - maximum allowable junction temperature, supporting high-ambient industrial deployments |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance, used to calculate safe power derating above 25 °C ambient |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-indicated by molded band on case body. Weight: 0.210 g. Molding compound meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., DC bias fault) |
| Cathode | Reverse clamping terminal | Marked with band; connected to higher-potential side; initiates avalanche clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Clamping speed | <1.0 ps response - enables suppression of ultrafast ESD events before sensitive ICs are damaged |
| Glass passivation | Stable junction reliability - prevents moisture ingress and long-term parameter drift in humid environments |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b immunity - validated for automotive load-dump and inductive switching transient protection |
| Moisture sensitivity | Level 1 per J-STD-020 - allows unlimited floor life without dry-pack or baking prior to reflow |
| RoHS & halogen-free | Compliant per IEC 61249-2-21 - meets global environmental regulations for consumer and industrial end equipment |
Applications
| Telecom Line Interface Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting RS-485 transceivers and Ethernet PHYs from induced surges on outdoor cabling exposed to lightning. IC Role / Device Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach the transceiver ESD structure. Use Value: Limits clamped voltage to 10.8 V, well below the 16 V absolute maximum rating of common RS-485 drivers, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding 4–20 mA current-loop sensor inputs in factory automation PLC modules subjected to relay coil flyback. IC Role / Device Role: Reverse-biased TVS across input terminals, absorbing 1500 W inductive spikes without degrading loop accuracy. Use Value: With only 1000 µA leakage at 5.5 V, it avoids introducing offset error into precision analog front-ends. |
| Consumer USB Port ESD Guard | Automotive Body Control Module (BCM) Power Input |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer-based TVS, meeting IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role: Fast-response silicon TVS providing low-clamp backup to slower polymer devices during multi-pulse ESD events. Use Value: Sub-nanosecond response ensures clamping occurs within first 100 ps of ESD strike, reducing energy delivered to downstream USB PHY. |
Use Scenario: Protecting 12 V supply rail of BCM microcontroller from load dump pulses per ISO 7637-2 Pulse 5a (75 V/400 ms). IC Role / Device Role: Unidirectional TVS placed between battery rail and ground, activated only during overvoltage transients. Use Value: 1500 W rating sustains 75 V × 20 A = 1500 W surge for 400 ms, matching ISO 7637-2 Pulse 5a energy profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Same DO-214AA (SMB) package but lower 600 W PPK; VBR = 7.13–7.88 V; VC = 11.3 V @ 53 A | Lower power handling limits suitability to sub-1 kV lightning surges or ESD-only roles | Select SMBJ6.8A only when board space constraints prevent SMC placement or when system-level testing confirms 600 W suffices. |
| 1.5KE6.8C | Through-hole DO-15 package; identical VBR/VC specs but higher RθJA (~65 °C/W); same 1500 W rating | Requires wave soldering or hand assembly; unsuitable for fully SMT production lines | Choose 1.5KE6.8C only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ6.8A and 1.5KE6.8C, the 1.5SMC6.8C uniquely balances high 1500 W surge capacity with SMT manufacturability and low thermal resistance (RθJA = 50 °C/W), making it optimal for automated production of compact, high-reliability industrial and automotive modules.
Availability
1.5SMC6.8C is available at Aetrix Electronics and suitable for telecom line interface protection, industrial sensor signal conditioning, consumer USB port ESD guard, and automotive body control module power input requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC6.8C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial, automotive, and consumer markets.
The 1.5SMC series was designed specifically for high-power, surface-mount transient suppression in space-constrained applications demanding robust ISO 7637-2 and IEC 61000-4-5 compliance without sacrificing automated assembly yield.
FAQ
What does the 'C' suffix indicate in 1.5SMC6.8C?
The 'C' suffix in 1.5SMC6.8C denotes unidirectional configuration - meaning it functions as a single-polarity TVS diode with cathode band marking, clamping only in reverse bias. This distinguishes it from bidirectional variants (e.g., 1.5SMC6.8CA), which suppress transients in both directions and lack polarity marking. The 1.5SMC6.8C is intended for DC-biased lines like power rails or single-ended signal paths.
How does 1.5SMC6.8C differ from 1.5SMC6.8A?
The 1.5SMC6.8A has tighter breakdown voltage tolerance (6.46–7.14 V vs. 6.12–7.48 V for 1.5SMC6.8C) and slightly lower clamping voltage (10.5 V vs. 10.8 V at rated current), reflecting improved process control. Both share identical package, power rating, and thermal specs, but 1.5SMC6.8A is preferred where precise VBR matching is critical - such as in redundant protection schemes or calibrated sensor front-ends.
Is 1.5SMC6.8C suitable for protecting AC-coupled signals?
No - the 1.5SMC6.8C is unidirectional and must not be used on AC-coupled or bipolar signal lines without external biasing. Its cathode-banded construction blocks conduction in one direction only. For AC applications like Ethernet or audio lines, a bidirectional variant (e.g., 1.5SMC6.8CA) or back-to-back diode configuration is required to ensure symmetrical clamping above and below ground.
What is the maximum surge current 1.5SMC6.8C can handle?
The 1.5SMC6.8C supports a maximum peak impulse current (IPPM) of 145 A under the standard 1 ms exponential waveform defined in Fig.5 of its datasheet. This value is derived from its 1500 W peak power rating and 10.8 V clamping voltage (I = P/V). Derating applies above 25 °C ambient per Fig.2, reducing usable IPPM by ~1.2% per °C rise.
Does 1.5SMC6.8C meet automotive qualification standards?
Yes - the 1.5SMC6.8C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in automotive electronic modules. While not AEC-Q200 qualified as a standalone component, its electrical and mechanical specifications align with automotive-grade surge protection needs when implemented per manufacturer layout guidelines and system-level validation.
1.5SMC6.8C 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):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 145A
- 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)
1.5SMC6.8C FAQ
1.How can I place an order for 1.5SMC6.8C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8C 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 1.5SMC6.8C reliable?
The price and inventory of 1.5SMC6.8C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8C is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8C?
1.5SMC6.8C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8C 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 1.5SMC6.8C?
For technical support, including 1.5SMC6.8C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8C requirements.
6.How does Aetrix verify that 1.5SMC6.8C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8C 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 1.5SMC6.8C meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8C?
All 1.5SMC6.8C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8C, 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 1.5SMC6.8C part is unused and in its original packaging.
Return procedure for 1.5SMC6.8C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8C Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
