My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ22CH
- Part No.:
- SMCJ22CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CH.pdf
- Description:
- 1500W, 27.1V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ22CH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) in DO-214AB (SMC) package, with 22V working stand-off voltage (VWM), 24.4–29.8V breakdown voltage (VBR @ IT = 1 mA), and 39.4V maximum clamping voltage (VC @ IPPM = 39 A). It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients and ESD.
For engineers reviewing the SMCJ22CH datasheet, SMCJ22CH pinout, SMCJ22CH application, or SMCJ22CH equivalent, this device is selected for high-energy surge immunity in 24V systems where bidirectional clamping, AEC-Q101 qualification, and sub-1ps response time are required - especially in engine control units, body electronics, and CAN/LIN bus protection circuits.
Technical Context
The SMCJ22CH uses a glass-passivated silicon junction optimized for fast transient suppression, achieving typical response time under 1.0 ps from 0 V to VBR min. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity concerns.
It meets ISO 7637-2 test requirements for automotive load-dump and switching transients, with peak pulse power rating of 1500 W at tp = 1 ms and junction temperature range of –55°C to +150°C. Thermal resistance is RθJA = 55°C/W and RθJC = 10°C/W, supporting reliable operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold for 24V nominal rails. |
| VBR min/max | 24.4 V / 29.8 V @ IT = 1 mA - Confirmed breakdown window ensures predictable turn-on across process variation and temperature. |
| VC @ IPPM | 39.4 V @ 39 A - Clamping voltage during 10/1000 µs surge defines worst-case stress on downstream ICs like microcontrollers or transceivers. |
| PPK | 1500 W - Peak pulse power handling capacity determines survivability against ISO 7637-2 Pulse 5a (load dump) events. |
| IR @ VWM | <1 µA - Ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensing paths. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline enabling automated placement and compatibility with IPC-7351B land patterns. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation means both terminals are functionally symmetric; no anode/cathode distinction in circuit use).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side) | Transient return path (bidirectional) | Functions identically to cathode terminal; both pins clamp equally in either polarity - no directional bias required in layout. |
| Cathode (band side) | Transient return path (bidirectional) | Same electrical role as anode pin; marking band is retained for mechanical orientation only per JEDEC DO-214AB standard. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for under-hood ECUs without additional qualification. |
| ISO 7637-2 compliance | Tested to Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) - eliminates need for external test validation. |
| Glass passivated junction | Enables stable VBR and low IR over lifetime and humidity exposure, critical for long-life industrial equipment deployed in humid environments. |
| Fast response time <1.0 ps | Clamps before sensitive logic or analog circuitry can be damaged by ESD or lightning-induced surges - essential for protecting USB, LIN, or sensor interfaces. |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; compatible with standard SMT assembly lines without special handling or dry-pack protocols. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting 24V supply input and CAN_H/CAN_L lines from load dump and inductive kickback during relay switching. IC Role / Device Role / Timing Role: Bidirectional TVS diode providing primary overvoltage clamping at board entry point and bus interface level. Use Value: Limits transient voltage to ≤39.4 V during 1500 W surges, preventing latch-up or permanent damage to CAN transceivers (e.g., TJA1042) and MCU power domains. |
Use Scenario: Shielding analog input channels (4–20 mA, 0–10 V) and digital outputs from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor placed directly at connector interface before signal conditioning circuitry. Use Value: Maintains <1 µA leakage at 22 V, avoiding measurement drift in precision current loops while clamping 39 A surges within 1 ps. |
| Telecom Power Supply Input | Smart Building HVAC Controller |
Use Scenario: Safeguarding 24/48 V DC input stage of PoE-powered base stations and remote radio units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end TVS in multi-stage protection architecture, coordinated with GDT and MOV. Use Value: 1500 W peak power rating absorbs energy from 10/1000 µs waveforms without thermal runaway, enabling compact, single-device solution. |
Use Scenario: Securing RS-485 communication lines and 24 V auxiliary power in wall-mounted thermostats exposed to HVAC motor noise and building ground shifts. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential bus lines, referenced to local ground plane. Use Value: Symmetrical VBR (24.4–29.8 V) ensures equal positive/negative clamping margin, preserving signal integrity on half-duplex RS-485 links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Lower PPK = 400 W; VBR = 24.4–27.0 V; DO-214AC (SMA) package. | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients in consumer-grade 24V systems. | Select SMAJ22CA only when space constraints prohibit SMC footprint and surge energy is ≤400 W. |
| 1.5KE22CA | Higher PPK = 1500 W but through-hole DO-15 package; VBR = 23.1–25.6 V; slower thermal response. | Requires manual or wave soldering; incompatible with fully automated SMT lines and high-density automotive PCBs. | Choose 1.5KE22CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ22CA and 1.5KE22CA, the SMCJ22CH delivers identical 22 V standoff and bidirectional clamping in a surface-mount AEC-Q101-qualified package with full ISO 7637-2 coverage - making it the only option that satisfies automotive production requirements without layout or process compromise.
Availability
SMCJ22CH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom power supply engineering requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SMCJ22CH 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 automotive-qualified components.
The SMCJ series was developed specifically for AEC-Q101-compliant transient protection in 12 V/24 V/48 V automotive and industrial systems, emphasizing high PPK density, fast response, and robust packaging for harsh-environment reliability.
FAQ
What is the polarity configuration of SMCJ22CH?
The SMCJ22CH is a bidirectional TVS diode, meaning it clamps voltage transients equally in both directions. Its DO-214AB package includes a cathode band for mechanical orientation only - both terminals perform identically in circuit operation, eliminating polarity-dependent layout constraints. This makes SMCJ22CH ideal for AC-coupled lines, differential buses like CAN or RS-485, and floating power domains where polarity reversal may occur.
Does SMCJ22CH meet AEC-Q101 requirements for automotive use?
Yes, SMCJ22CH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It has undergone stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥8 kV, CDM ≥1 kV), confirming suitability for under-hood and chassis-mounted automotive applications. The qualification applies directly to the SMCJ22CH part number, not just the family.
What is the maximum clamping voltage of SMCJ22CH under surge conditions?
The maximum clamping voltage (VC) of SMCJ22CH is 39.4 V at a peak impulse current (IPPM) of 39 A, measured using the standard 10/1000 µs double-exponential waveform. This value represents the worst-case voltage seen by protected circuitry during a full-energy 1500 W transient, and is guaranteed across temperature and process variation per the datasheet specification table.
Can SMCJ22CH replace unidirectional SMCJ22H in existing designs?
No - SMCJ22CH and SMCJ22H are electrically distinct: SMCJ22CH is bidirectional with symmetrical clamping, while SMCJ22H is unidirectional and conducts forward current above ~3.5 V. Substituting SMCJ22CH for SMCJ22H in DC-biased circuits may cause unintended conduction or failure to clamp correctly. Always verify circuit topology and bias conditions before interchange.
What is the moisture sensitivity level (MSL) of SMCJ22CH and its reflow implications?
SMCJ22CH has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not moisture-sensitive and requires no baking or dry-pack handling prior to reflow soldering. It supports standard lead-free reflow profiles (peak ≤260°C) without popcorn risk or delamination, simplifying manufacturing for high-volume SMT lines.
SMCJ22CH 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMCJ22CH FAQ
1.How can I place an order for SMCJ22CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CH 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 SMCJ22CH reliable?
The price and inventory of SMCJ22CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CH is usually 5 days.
3.What payment methods are accepted for SMCJ22CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CH?
SMCJ22CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CH 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 SMCJ22CH?
For technical support, including SMCJ22CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CH requirements.
6.How does Aetrix verify that SMCJ22CH is sourced from the original manufacturer or authorized distributors?
All SMCJ22CH 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 SMCJ22CH meets industry standards.
7.What is the process for return or replacement of SMCJ22CH?
All SMCJ22CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CH, 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 SMCJ22CH part is unused and in its original packaging.
Return procedure for SMCJ22CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CH 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…
