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Taiwan Semiconductor Corporation SMCJ22H
- Part No.:
- SMCJ22H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22H.pdf
- Description:
- 1500W, 27.1V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:5,114
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Product details
Overview
SMCJ22H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 22V working stand-off voltage (VWM), 24.4–29.8V breakdown voltage (VBR @ 1mA), and 39.4V maximum clamping voltage (VC @ 39A). It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection in power rails.
For engineers reviewing the SMCJ22H datasheet, SMCJ22H pinout, SMCJ22H application, or SMCJ22H equivalent, this part supports high-reliability DC power line protection where fast clamping (<1.0 ps response), low leakage (<1 µA @ 22V), and robust 1500W surge handling are required - especially in automotive ECUs, industrial PLCs, and telecom power interfaces.
Technical Context
The SMCJ22H employs a glass-passivated silicon junction optimized for unidirectional transient suppression, with thermal resistance RθJC = 10°C/W enabling effective heat transfer to the PCB pad during 1ms surges. Its clamping behavior follows standardized 10/1000µs waveform per REA, delivering predictable VC under defined IPPM conditions.
Designed for automotive-grade reliability, it operates across –55°C to +150°C junction temperature range, complies with JESD201 Class 2 whisker resistance, and features matte tin-plated leads solderable per J-STD-002. Polarity is marked by cathode band on the DO-214AB body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24V systems. |
| VBR min/max | 24.4 V / 29.8 V @ 1 mA - Confirmed breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 39.4 V @ 39 A - Clamping voltage under 10/1000µs surge defines worst-case overvoltage seen by downstream ICs. |
| PPK | 1500 W - Peak pulse power rating at TA = 25°C; derates linearly above 25°C per Fig.2. |
| IR @ VWM | <1 µA - Reverse leakage at 22V ensures negligible standby current drain in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210g mass and UL 94V-0 molding compound. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with axial-leaded configuration adapted for surface mounting; cathode indicated by band on body; terminals are matte tin-plated for reliable reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts during forward surge events (e.g., reverse polarity). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24V rail); initiates avalanche breakdown when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST - suitable for ECU, ADAS, and body control modules. |
| Clamping response time | <1.0 ps - Enables protection of high-speed digital interfaces and microcontrollers against ESD-induced latch-up. |
| ISO 7637-2 compliance | Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), Pulse 3a/3b (capacitive coupling) - certified for 12V/24V vehicle networks. |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; supports MSL Level 1 per J-STD-020. |
| Low forward voltage | VF = 3.5 V @ 100 A - Minimizes power loss during high-current forward surges such as reverse-battery events. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units against load-dump transients up to 35V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBAT and GND, clamping surges within 39.4V to safeguard PMICs and MCU power inputs. Use Value: Prevents permanent damage to 3.3V/5V logic rails by limiting peak overvoltage below 40V while sustaining 1500W surge energy. |
Use Scenario: Shielding analog input channels of programmable logic controllers from field-wiring induced transients during maintenance or lightning coupling. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, absorbing fast-rising common-mode spikes before signal conditioning circuitry. Use Value: Maintains <1 µA leakage at 22V to avoid offset errors in precision 4–20mA receivers while responding in sub-picosecond time. |
| Telecom DC Power Interface | Consumer Equipment Surge Immunity |
Use Scenario: Securing -48V DC power feeds in base station remote radio units exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; SMCJ22H deployed in unidirectional configuration with series fuse for fail-safe open-circuit behavior. Use Value: Delivers 39.4V clamping at 39A without degradation after repeated 10/1000µs pulses - verified per IEC 61000-4-5 Ed.3 Annex B. |
Use Scenario: Hardening USB-C PD power delivery paths in smart home hubs against ESD events exceeding ±15kV contact discharge (IEC 61000-4-2). IC Role / Device Role / Timing Role: Primary-level TVS on VBUS line upstream of buck converter, activated before internal MOSFET gate oxide breakdown occurs. Use Value: Sub-1ps response ensures clamping initiates prior to 1ns rise-time ESD pulses, preventing latch-up in companion USB PD controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | 600W rating, SMB package (smaller footprint), lower IPPM (21.5A), higher VC (37.5V) | Lower surge capacity; suitable only for non-automotive, low-energy interfaces like sensor nodes | Select SMCJ22H when 1500W surge immunity and AEC-Q101 compliance are mandatory. |
| 1.5KE22A | Through-hole DO-201 package, same 1500W rating but slower response (>1ns), higher IR (5µA @ 22V) | Not suitable for automated SMT assembly; incompatible with space-constrained PCB layouts | Choose SMCJ22H for surface-mount compatibility, faster clamping, and automotive qualification. |
Compared with SMBJ22A and 1.5KE22A, the SMCJ22H provides superior surge robustness in compact SMT form factor, guaranteed sub-picosecond response, and full automotive qualification - making it the preferred choice for safety-critical 24V rail protection where layout density and reliability are co-prioritized.
Availability
SMCJ22H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power interface designs requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMCJ22H 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 distribution and AEC-Q101 validation capability.
The SMCJ22H belongs to TSC's high-power surface-mount TVS family engineered specifically for automotive and industrial transient immunity - emphasizing low clamping ratio, repeatable surge endurance, and process-controlled glass passivation.
FAQ
What is the clamping voltage of the SMCJ22H under a standard 10/1000µs surge?
The SMCJ22H has a maximum clamping voltage (VC) of 39.4 V when subjected to its rated peak pulse current (IPPM) of 39 A using the 10/1000µs waveform defined in REA standards. This value is measured at TJ = 25°C and represents the upper limit of overvoltage imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMCJ22H suitable for bidirectional transient protection?
No, the SMCJ22H is a unidirectional TVS diode intended for DC power line protection where polarity is fixed. For bidirectional applications such as AC lines or data bus protection, TSC offers the SMCJ22CH variant (with CH suffix), which provides symmetrical clamping in both directions and identical VBR/VWM specifications.
Does the SMCJ22H meet automotive qualification standards?
Yes, the SMCJ22H is AEC-Q101 qualified and tested for automotive use, including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements for 12V and 24V vehicle networks - confirming suitability for ECU, body control, and ADAS subsystems.
What is the thermal resistance from junction to ambient for the SMCJ22H?
The SMCJ22H has a typical junction-to-ambient thermal resistance (RθJA) of 55°C/W under standard JEDEC PCB mounting conditions (2s2p copper). This value assumes minimal copper area; actual RθJA improves significantly with larger thermal pads or internal plane connections - essential for sustaining repeated surges in thermally constrained enclosures.
How does the SMCJ22H compare to the SMCJ22AH variant?
The SMCJ22AH differs from the SMCJ22H in tighter breakdown voltage tolerance: SMCJ22H specifies VBR = 24.4–29.8 V, while SMCJ22AH narrows it to 24.4–26.9 V. Both share identical VWM (22 V), VC (35.5 V), and PPK (1500 W), but the 'A' suffix indicates enhanced binning for applications demanding tighter VBR consistency - such as precision crowbar circuits or matched array designs.
SMCJ22H 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ22H FAQ
1.How can I place an order for SMCJ22H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22H 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 SMCJ22H reliable?
The price and inventory of SMCJ22H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22H is usually 5 days.
3.What payment methods are accepted for SMCJ22H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22H?
SMCJ22H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22H 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 SMCJ22H?
For technical support, including SMCJ22H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22H requirements.
6.How does Aetrix verify that SMCJ22H is sourced from the original manufacturer or authorized distributors?
All SMCJ22H 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 SMCJ22H meets industry standards.
7.What is the process for return or replacement of SMCJ22H?
All SMCJ22H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22H, 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 SMCJ22H part is unused and in its original packaging.
Return procedure for SMCJ22H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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