My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ110A
- Part No.:
- SMCJ110A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ110A.pdf
- Description:
- TVS DIODE 110VWM 177VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ110A from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 110V working stand-off voltage (VWM), 122–135V breakdown voltage (VBR), and 177V maximum clamping voltage (VC) at 8.9A peak impulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ110A datasheet, SMCJ110A pinout, SMCJ110A application, or SMCJ110A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 2b/5a, thermal derating above 25°C, unidirectional polarity marking, and compatibility with automated SMT placement on high-reliability industrial PCBs.
Technical Context
The SMCJ110A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (122–135V @ IT = 1mA). It clamps transients to ≤177V within <1.0ps response time, sustaining 1500W peak pulse power (tp = 1ms) per Fig.5 waveform while maintaining <1μA leakage at 110V.
Its DO-214AB package delivers RθJA = 55°C/W and RθJC = 10°C/W, enabling operation from –55°C to +150°C junction temperature. The device meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 122V / 135V @ IT = 1mA - Ensures reliable turn-on margin above VWM for robust surge detection |
| VC @ IPPM | 177V @ 8.9A - Clamped voltage during 10/1000μs transient, limiting downstream IC stress |
| PPK | 1500W - Peak pulse power handling per single 1ms surge, per IEC 61000-4-5 & ISO 7637-2 |
| IR @ VWM | <1μA - Minimal leakage ensures low standby power loss in always-on systems |
| TJ max | +150°C - Enables use in under-hood automotive and industrial power converters |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with IPC-7351B land pattern |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking on one end; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability; polarity marked by molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference | Connected to system ground or low-side return; defines conduction direction during clamping |
| Cathode | Transient voltage input / High-side connection | Connected to protected line (e.g., 12V rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure |
| Fast response time <1.0ps | Enables suppression of ESD and fast-rising transients before sensitive downstream logic is damaged |
| Meets ISO 7637-2 Pulse 2b/5a | Validated for automotive load-dump and alternator-induced surges up to 120V/100ms |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| J-STD-020 Level 1 MSL | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load-dump transients up to 120V during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within 177V to protect LDOs and microcontrollers. Use Value: Prevents latch-up or permanent damage in automotive control modules by limiting peak voltage below 180V during ISO 7637-2 Pulse 5a events. | Use Scenario: Digital input channels on programmable logic controllers subjected to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: TVS connected across input terminals to shunt flyback energy from 24V relay coils into common ground. Use Value: Eliminates false triggering and contact arcing by clamping transients to ≤177V within sub-nanosecond response, preserving signal integrity. |
| LED Driver Overvoltage Clamp | Telecom Power Interface Protection |
Use Scenario: Constant-current LED drivers in street lighting systems experiencing lightning-induced surges on AC/DC front-end rails. IC Role / Device Role / Timing Role: SMCJ110A placed across bulk capacitor output to clamp overvoltage spikes before they reach driver ICs. Use Value: Maintains LED system uptime by absorbing 1500W transient energy without degradation, supporting >100,000 surge cycles per JEDEC JESD22-A114. | Use Scenario: 48V DC power interface on telecom base station equipment exposed to EFT bursts and surge coupling from nearby lightning strikes. IC Role / Device Role / Timing Role: TVS installed at power entry point to limit incoming transients before reaching DC-DC converters and PMICs. Use Value: Achieves IEC 61000-4-4 Level 4 (4kV EFT) and IEC 61000-4-5 Level 3 (2kV surge) compliance with single-device solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC110A | Same VWM (110V), lower PPK (1000W), higher VC (187V @ 7.1A) | Less robust for ISO 7637-2 Pulse 5a; suitable only for lower-energy EFT environments | Select when cost sensitivity outweighs peak surge margin and thermal derating headroom is limited |
| 1.5SMC110A | Identical VWM/VBR/VC specs, same DO-214AB package, but from ON Semiconductor | No functional or layout change required; validated for identical automotive and industrial standards | Preferred for dual-sourcing programs requiring second-source qualification without redesign |
Compared with SAC110A and 1.5SMC110A, the SMCJ110A offers superior 1500W surge capacity and tighter clamping (177V vs. 187V), making it optimal for high-stress automotive and industrial power rails where transient energy exceeds 1kJ.
Availability
SMCJ110A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED drivers, and telecom power interfaces requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SMCJ110A 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 SMCJ series is part of TSC's high-power transient suppression product line, engineered specifically for automotive-grade load-dump immunity, industrial surge resilience, and compliance with ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the clamping voltage of the SMCJ110A under standard test conditions?
The SMCJ110A has a maximum clamping voltage (VC) of 177V at 8.9A peak impulse current (IPPM), measured using the 10/1000μs waveform defined in Fig.5 of the datasheet. This value ensures downstream components see no more than 177V during worst-case transients, critical for protecting 200V-rated capacitors and 160V-input DC-DC converters in automotive applications.
Is the SMCJ110A unidirectional or bidirectional, and how is polarity identified?
The SMCJ110A is a unidirectional TVS diode, with polarity indicated by a molded cathode band on the DO-214AB package. The cathode terminal connects to the protected line (e.g., 12V rail), and the anode connects to ground. Bidirectional variants use "CA" suffix (e.g., SMCJ110CA), which are not interchangeable with the SMCJ110A due to different IV characteristics.
Does the SMCJ110A meet automotive transient immunity standards?
Yes, the SMCJ110A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, including Pulse 2b (inductive switch-off) and Pulse 5a (load dump). Its 1500W peak power rating and 177V clamping enable compliance with OEM-level surge specifications for engine control units and body electronics modules.
What is the maximum junction temperature and thermal resistance of the SMCJ110A?
The SMCJ110A has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case). These values allow operation in under-hood environments up to +125°C ambient when mounted on ≥1 sq-in copper area, with full 1500W rating only at TA = 25°C.
Can the SMCJ110A be used in place of the SMCJ110 without modification?
No - the SMCJ110A has tighter VBR tolerance (122–135V) versus SMCJ110 (122–149V) and lower clamping voltage (177V vs. 196V), resulting in earlier conduction and reduced stress on downstream components. While both share the same DO-214AB package and pinout, substituting SMCJ110A for SMCJ110 may alter system-level surge margin and requires validation of clamping behavior in the target application.
SMCJ110A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ110A FAQ
1.How can I place an order for SMCJ110A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ110A 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 SMCJ110A reliable?
The price and inventory of SMCJ110A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ110A is usually 5 days.
3.What payment methods are accepted for SMCJ110A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ110A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ110A?
SMCJ110A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ110A 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 SMCJ110A?
For technical support, including SMCJ110A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ110A requirements.
6.How does Aetrix verify that SMCJ110A is sourced from the original manufacturer or authorized distributors?
All SMCJ110A 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 SMCJ110A meets industry standards.
7.What is the process for return or replacement of SMCJ110A?
All SMCJ110A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ110A, 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 SMCJ110A part is unused and in its original packaging.
Return procedure for SMCJ110A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ110A 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…
