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Taiwan Semiconductor Corporation SMBJ16CH
- Part No.:
- SMBJ16CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ16CH.pdf
- Description:
- 600W, 19.8V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,728
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Product details
Overview
SMBJ16CH from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 16 V working stand-off voltage (VWM), 17.8–21.8 V breakdown voltage (VBR), 28.8 V maximum clamping voltage (VC) at 21.8 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform - deployed to safeguard CAN transceivers and microcontroller I/O against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ16CH datasheet, SMBJ16CH pinout, SMBJ16CH application, or SMBJ16CH equivalent, key selection criteria include clamping performance under 10/1000 µs surges, leakage current ≤1 µA at 16 V, AEC-Q101 qualification, bidirectional marking compatibility (CH suffix), and thermal resistance (RθJA = 55 °C/W) for PCB-level thermal design validation.
Technical Context
The SMBJ16CH operates as a silicon avalanche diode with glass-passivated junction, enabling sub-1 ps response time and stable clamping during fast-rising EFT or load-dump events. Its unidirectional configuration uses cathode-band polarity marking and exhibits forward voltage of 3.5 V at 50 A only in uni-directional variants - not applicable here due to CH suffix indicating bidirectional capability.
As a member of the SMBJH series, SMBJ16CH supports bidirectional transient suppression without external polarity reversal, meeting ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery connection/disconnection), and Pulse 3a/3b (capacitive coupling) test profiles. Junction temperature range spans −55 °C to +150 °C, with moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 17.8 V / 21.8 V at IT = 1 mA - ensures reliable avalanche initiation above stand-off voltage |
| VC @ IPP | 28.8 V at IPP = 21.8 A (10/1000 µs) - defines worst-case voltage seen by protected IC during surge |
| PPK | 600 W - peak impulse power handling capacity under standardized surge waveform |
| ID @ VWM | ≤1 µA - ultra-low leakage preserves signal integrity and battery life in always-on systems |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 55 °C/W - determines required copper area and thermal vias for sustained power dissipation |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, UL 94V-0 molding compound, polarity marked by cathode band (bidirectional function implemented internally; no anode/cathode distinction in circuit role).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked end) | Transient return path | Connects to ground or low-impedance reference plane; carries full surge current during clamping |
| Cathode (banded end) | Protected line interface | Connects to line being protected (e.g., CAN_H, 12 V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Clamping voltage ≤28.8 V | Keeps downstream 3.3 V/5 V logic inputs below absolute maximum ratings during 21.8 A surge |
| Response time <1 ps | Activates before most system-level transients propagate into sensitive analog/digital circuitry |
| ISO 7637-2 compliance | Guarantees protection against real-world automotive electrical disturbances without additional filtering |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V battery line in engine control unit exposed to load dump (Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤28.8 V, preventing latch-up or gate oxide damage in upstream PMICs rated for 36 V abs max. | Use Scenario: High-speed CAN FD network in ADAS domain controller subjected to ESD and coupled noise. IC Role / Device Role / Timing Role: Bidirectional TVS across CAN_H–CAN_L differential pair, referenced to chassis ground. Use Value: Maintains signal integrity by clamping common-mode surges while adding <1 pF junction capacitance - no data rate degradation at 5 Mbps. |
| Industrial Sensor Interface Protection | LED Driver Input Stage Protection |
Use Scenario: 4–20 mA current loop sensor node powered from 24 V supply in factory automation cabinet. IC Role / Device Role / Timing Role: Unidirectional TVS on 24 V input rail upstream of LDO regulator and signal conditioner ASIC. Use Value: Absorbs 600 W surges from relay coil switching (Pulse 3b), limiting voltage excursion to safe levels for 30 V-rated regulators. | Use Scenario: Constant-current LED driver board in outdoor signage subjected to lightning-induced surges on AC input rectifier output. IC Role / Device Role / Timing Role: Bidirectional TVS placed across bulk capacitor terminals after bridge rectifier. Use Value: Clamps reverse-polarity transients and AC-coupled spikes to ≤28.8 V, preventing electrolytic capacitor overvoltage failure. |
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 SMAJ16CA | Same DO-214AC (SMA) package; VBR = 17.8–21.8 V; VC = 28.8 V; PPK = 400 W | Lower peak power rating reduces margin for repetitive surges in harsh environments | Select when footprint compatibility with SMA package is prioritized over 600 W surge headroom |
| ON Semiconductor SMCJ16CA | DO-214AB (SMC) package; VBR = 17.8–21.8 V; VC = 27.7 V; PPK = 1500 W | Larger SMC package offers superior thermal mass but requires PCB area increase | Choose for higher-reliability industrial designs where 1500 W surge capacity justifies larger layout footprint |
Compared with SMBJ16CH, SMAJ16CA trades 200 W peak power for smaller SMA footprint, while SMCJ16CA delivers 2.5× higher surge energy handling in a larger SMC package - enabling differentiated trade-offs between board space, thermal robustness, and transient margin.
Availability
SMBJ16CH is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, CAN FD networks, and LED driver input stages requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMBJ16CH 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 automotive and industrial certifications.
The SMBJH series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive subsystems and ruggedized industrial controls - emphasizing low clamping voltage, repeatable surge endurance, and JEDEC-standard packaging.
FAQ
What is the polarity configuration of SMBJ16CH?
SMBJ16CH is a bidirectional TVS diode, indicated by the "CH" suffix per TSC's ordering nomenclature. Unlike unidirectional variants (e.g., SMBJ16H), it provides symmetrical clamping for both positive and negative transients without requiring external polarity alignment. This makes SMBJ16CH ideal for differential signal lines like CAN or RS-485 where voltage reversals occur naturally during normal operation.
Does SMBJ16CH meet automotive qualification standards?
Yes, SMBJ16CH is AEC-Q101 qualified and explicitly tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its construction - glass-passivated junction, moisture sensitivity level 1, and −55 °C to +150 °C operating range - satisfies requirements for under-hood and body-control module deployments. The SMBJ16CH datasheet revision A2102 documents full qualification test reports.
What is the maximum clamping voltage of SMBJ16CH and at what current?
The maximum clamping voltage (VC) of SMBJ16CH is 28.8 V, measured at a peak pulse current (IPP) of 21.8 A using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage that will appear across the protected line during a worst-case surge event - critical for ensuring downstream ICs remain within their absolute maximum voltage ratings.
How does SMBJ16CH differ from SMBJ16H?
SMBJ16CH is bidirectional, whereas SMBJ16H is unidirectional. The "CH" suffix denotes symmetrical breakdown behavior in both directions, enabling use on AC-coupled or differential lines without polarity concerns. SMBJ16H has a defined anode/cathode and conducts only during positive surges relative to its cathode. Both share identical VWM (16 V), VBR (17.8–21.8 V), and VC (28.8 V), but SMBJ16CH eliminates risk of incorrect orientation during automated assembly.
Is SMBJ16CH RoHS and halogen-free compliant?
Yes, SMBJ16CH complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and terminals are matte tin plated per J-STD-002 solderability standards. These material specifications are confirmed in TSC's SMBJH Series datasheet Version A2102 and supported by TSC's official compliance declarations.
SMBJ16CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 21.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ16CH FAQ
1.How can I place an order for SMBJ16CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ16CH 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 SMBJ16CH reliable?
The price and inventory of SMBJ16CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ16CH is usually 5 days.
3.What payment methods are accepted for SMBJ16CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ16CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ16CH?
SMBJ16CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ16CH 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 SMBJ16CH?
For technical support, including SMBJ16CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ16CH requirements.
6.How does Aetrix verify that SMBJ16CH is sourced from the original manufacturer or authorized distributors?
All SMBJ16CH 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 SMBJ16CH meets industry standards.
7.What is the process for return or replacement of SMBJ16CH?
All SMBJ16CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ16CH, 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 SMBJ16CH part is unused and in its original packaging.
Return procedure for SMBJ16CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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