My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ17CH
- Part No.:
- SMCJ17CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CH.pdf
- Description:
- 1500W, 21V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,179
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ17CH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 17V working stand-off voltage (VWM), 18.9–23.1V breakdown voltage (VBR), and 30.5V maximum clamping voltage (VC) at 51A peak pulse current. It delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and <1.0ps response time for automotive and industrial power rail protection.
For engineers reviewing the SMCJ17CH datasheet, SMCJ17CH pinout, SMCJ17CH application, or SMCJ17CH equivalent, this page provides verified electrical parameters, thermal performance data, bidirectional variant compatibility notes, and real-world ESD/transient suppression use cases aligned with IEC 61000-4-2/4-4/4-5 and automotive load-dump immunity requirements.
Technical Context
The SMCJ17CH employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise to VBR) and low leakage (<1μA at 17V). Its unidirectional configuration supports anode-to-cathode forward conduction path with VF = 3.5V @ 100A, enabling integration into DC power lines where polarity-aware clamping is required.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting 5W steady-state dissipation at 25°C ambient. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for 24V automotive systems. |
| VBR min/max | 18.9 / 23.1 V @ IT = 1 mA - Confirmed breakdown threshold range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 30.5 V @ 51 A - Clamping voltage under 10/1000μs surge; limits downstream IC stress to ≤30.5V during ISO 7637-2 Pulse 5a events. |
| PPK | 1500 W - Peak pulse power rating per 1ms waveform; sustains high-energy lightning-induced surges in telecom and industrial interfaces. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves battery life in always-on automotive modules and low-power sensor nodes. |
| TJ max | +150 °C - Enables placement near heat-generating components (e.g., power MOSFETs, DC-DC converters) without derating concerns. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g. UL 94V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias reference | Connected to lower-potential side of protected line (e.g., GND or return path); enables unidirectional clamping toward ground. |
| Cathode | Clamping output / Surge current sink | Connected to higher-potential rail (e.g., 12V/24V supply); conducts transient energy to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control units and body electronics with full temperature cycling and HTRB testing. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation. |
| Glass passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates risk of junction corrosion in humid environments (e.g., EV charging stations). |
| Fast response time | <1.0 ps from 0 V to VBR min - faster than typical ESD diodes, enabling protection of high-speed CAN/LIN transceivers and MCU I/O pins. |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow; supports standard SMT assembly without special handling. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input/Output Protection |
|---|---|
Use Scenario: Protecting 12V/24V supply lines in engine control units (ECUs) against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges before they reach sensitive regulators. Use Value: Limits peak voltage to 30.5V during 1500W transients, preventing overvoltage failure of 36V-rated buck controllers and microcontrollers. |
Use Scenario: Shielding digital I/O channels on programmable logic controllers from ESD and inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector interface to shunt fast transients before entering isolation barriers or signal conditioning circuits. Use Value: Sub-1ps response ensures clamping occurs before 2ns ESD pulses propagate into FPGA or ARM-based controller I/O structures. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Circuits |
Use Scenario: Safeguarding 48V PoE-powered equipment (e.g., IP cameras, wireless access points) from lightning-induced surges on Ethernet cables and DC inputs. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and Ethernet PHYs, absorbing energy per IEC 61000-4-5 Level 4. Use Value: 1500W PPK rating handles 4kV/2kA combination wave surges without thermal runaway, maintaining system uptime in outdoor deployments. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in home appliances (e.g., washing machines, vacuum cleaners) connected to microcontroller-based motor drivers. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMCJ17CH) used across motor terminals to clamp both positive and negative flyback voltages. Use Value: 30.5V clamping prevents latch-up in 3.3V/5V motor driver ICs while surviving repeated 200A IFSM surge events during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ17A | Same DO-214AC (SMA) package; lower PPK (400W); VBR = 18.9–22.1V; VC = 27.6V @ 14.3A. | Lower surge capacity suits consumer-grade 5V/12V rails but insufficient for ISO 7637-2 Pulse 5a automotive compliance. | Select SMCJ17CH when 1500W clamping and AEC-Q101 validation are mandatory; SMAJ17A fits space-constrained non-automotive designs. |
| Vishay SMF17A | DO-219AB (SOD-123FL) package; 200W PPK; VBR = 18.9–22.1V; VC = 27.6V @ 7.2A; no AEC-Q101 or ISO 7637-2 certification. | Targeted at board-level ESD protection only (IEC 61000-4-2), not system-level surge immunity. | Choose SMCJ17CH for full-system transient robustness; SMF17A is suitable for cost-sensitive, low-energy I/O port protection. |
Compared with SMAJ17A and SMF17A, the SMCJ17CH delivers 3.75× higher peak power handling, certified automotive qualification, and proven ISO 7637-2 immunity-making it the only option among the three capable of protecting 24V automotive ECUs against 12V load dump events without external series impedance.
Availability
SMCJ17CH is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMCJ17CH 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 was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of SMCJ17CH under a 10/1000μs surge?
The SMCJ17CH has a maximum clamping voltage (VC) of 30.5 V at 51 A peak pulse current (IPPM), measured per the 10/1000μs waveform defined in IEC 61000-4-5. This value ensures downstream components see no more than 30.5 V during standardized surge events, making SMCJ17CH suitable for protecting 36V-rated DC-DC converters and microcontrollers in automotive power domains.
Is SMCJ17CH unidirectional or bidirectional?
The SMCJ17CH is a unidirectional TVS diode, designed for polarity-specific clamping-cathode connected to the protected line, anode to ground. For bidirectional operation, the SMCJ17CAH variant (with "CAH" suffix) must be selected; it provides symmetrical clamping in both directions and shares identical VBR, VC, and PPK ratings with SMCJ17CH.
Does SMCJ17CH meet AEC-Q101 reliability standards?
Yes, SMCJ17CH is explicitly qualified to AEC-Q101 Rev D for stress testing including HTGB, HTRB, TCT, and mechanical shock. This certification confirms its suitability for automotive under-hood and chassis applications where extended temperature cycling and vibration resistance are mandatory-unlike generic industrial TVS diodes lacking this validation.
What is the maximum steady-state power dissipation of SMCJ17CH?
The SMCJ17CH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, derated linearly above that ambient temperature per the published thermal derating curve. This allows continuous operation in thermally managed PCB layouts-for example, with ≥2 cm² copper pour-and supports use in always-on modules like automotive telematics gateways.
Can SMCJ17CH replace SMCJ17A in existing designs?
SMCJ17CH is not a direct replacement for SMCJ17A: the "H" suffix denotes enhanced surge capability (1500W vs. 1500W same rating), but critical differences exist-SMCJ17CH uses DO-214AB (SMC) packaging while SMCJ17A uses DO-214AA (SMB), resulting in different pad layouts and thermal mass. Layout revision is required; verify mechanical fit and thermal performance before substitution.
SMCJ17CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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)
SMCJ17CH FAQ
1.How can I place an order for SMCJ17CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CH 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 SMCJ17CH reliable?
The price and inventory of SMCJ17CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CH is usually 5 days.
3.What payment methods are accepted for SMCJ17CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CH?
SMCJ17CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CH 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 SMCJ17CH?
For technical support, including SMCJ17CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CH requirements.
6.How does Aetrix verify that SMCJ17CH is sourced from the original manufacturer or authorized distributors?
All SMCJ17CH 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 SMCJ17CH meets industry standards.
7.What is the process for return or replacement of SMCJ17CH?
All SMCJ17CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CH, 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 SMCJ17CH part is unused and in its original packaging.
Return procedure for SMCJ17CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CH 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…
