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Taiwan Semiconductor Corporation SMBJ54CH
- Part No.:
- SMBJ54CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CH.pdf
- Description:
- 600W, 66.7V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,251
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Product details
Overview
SMBJ54CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 54V working stand-off voltage (VWM), and 96.3V maximum clamping voltage (VC@IPP) at 6.5A peak impulse current. It protects automotive and industrial electronics against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ54CH datasheet, SMBJ54CH pinout, SMBJ54CH application, or SMBJ54CH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, <1.0ps response time, sub-1μA leakage above 10V, and compliance with IEC 61249-2-21 halogen-free requirements.
Technical Context
The SMBJ54CH is a unidirectional/bidirectional TVS diode configured as a single die in a glass-passivated junction structure. Its electrical behavior follows ANSI/IEEE C62.35 standards, with breakdown voltage (VBR) specified at 60.0–73.3V under 1mA test current and clamping performance validated using 10/1000µs waveform per Figure 3.
Thermal design relies on RθJC = 10°C/W and RθJA = 55°C/W, enabling operation from –55°C to +150°C junction temperature. Polarity is marked via cathode band; for bidirectional use, the "CH" suffix confirms symmetrical conduction in both directions without polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 60.0 / 73.3 V @ 1 mA - Ensures reliable turn-on margin above VWM with defined test condition |
| VC@IPP | 96.3 V @ 6.5 A - Clamped voltage during 10/1000µs surge, limiting downstream IC stress |
| PPK | 600 W - Peak pulse power handling capacity per single transient event |
| ID@VWM | ≤1 µA - Ultra-low leakage preserves signal integrity and battery life in standby |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-power industrial enclosures |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | For bidirectional operation, neither terminal is functionally anode/cathode; symmetric conduction enables clamp in either polarity |
| Cathode (banded end) | Current exit terminal in forward bias | Banding is omitted on SMBJ54CH per bidirectional marking convention; device has no polarity-dependent orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress |
| Response time <1.0 ps | Clamps ESD and fast transients before sensitive logic or analog circuitry is damaged |
| ISO 7637-2 compliance | Withstands standardized automotive load-dump and inductive-switching pulses without failure |
| Halogen-free (IEC 61249-2-21) | Meets RoHS and environmental regulations for green manufacturing and end-of-life disposal |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail (VBAT/GND) to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits clamped voltage to 96.3V, preventing latch-up or gate oxide damage in 5V/3.3V systems powered from 12V/24V rails. | Use Scenario: Shielding analog front-end circuits (e.g., RTD, thermocouple amplifiers) from EFT and cable discharge events. IC Role / Device Role / Timing Role: Placed at connector interface to shunt fast transients (<1ns rise) before reaching precision op-amps or ADC inputs. Use Value: Sub-1μA leakage avoids DC offset errors; 600W rating handles repeated 1kV/50Ω EFT bursts per IEC 61000-4-4. |
| LED Driver Input Stage Protection | Smart Meter Communication Port Protection |
Use Scenario: Safeguarding constant-current LED drivers in streetlight and automotive lighting against inductive switching spikes. IC Role / Device Role / Timing Role: Mounted across input terminals to absorb energy from relay coil flyback or MOSFET switching overshoot. Use Value: 96.3V clamping ensures driver ICs rated for ≤100V absolute maximum survive repeated 100V+ transients. | Use Scenario: Securing RS-485 or PLC communication ports in utility meters exposed to lightning-induced surges on long wiring runs. IC Role / Device Role / Timing Role: Bidirectional TVS connected line-to-line and line-to-ground to suppress common-mode and differential-mode transients. Use Value: Symmetrical VBR (60.0–73.3V) and low capacitance enable clean signal integrity while meeting IEC 61000-4-5 Level 3 (1kV/2Ω) immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA | Same VWM, VBR, and PPK; identical DO-214AA package; manufactured by Vishay | No AEC-Q101 qualification; not ISO 7637-2 tested | Preferred for cost-sensitive industrial designs where automotive qualification is unnecessary |
| P6SMB54CA | Same 54V VWM and bidirectional configuration; 600W rating; DO-214AA package; manufactured by ON Semiconductor | Higher VC = 97.5V; slightly higher leakage (≤5µA); no halogen-free certification | Acceptable where minor clamping voltage increase is tolerable and RoHS-only compliance suffices |
Compared with SMBJ54CH, SMBJ54CA offers identical electrical specs but lacks automotive qualification, while P6SMB54CA trades tighter leakage and halogen-free status for marginally higher clamping-making SMBJ54CH optimal for AEC-Q101–mandated automotive subsystems requiring full ISO 7637-2 immunity.
Availability
SMBJ54CH is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor interfaces, LED driver inputs, and smart meter communication ports requiring stable component supply across extended temperature ranges and high-reliability transients protection.
Supply support for SMBJ54CH 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, rectifiers, and MOSFETs, with global distribution and AEC-Q101–qualified product lines.
The SMBJH series was designed specifically for robust transient suppression in automotive and industrial environments, emphasizing fast response, low leakage, and full ISO 7637-2 compliance in compact surface-mount packages.
FAQ
What does the "CH" suffix indicate in SMBJ54CH?
The "CH" suffix in SMBJ54CH denotes a bidirectional configuration with symmetrical clamping characteristics in both polarities. Unlike unidirectional variants (e.g., SMBJ54H), SMBJ54CH has no cathode band marking and is intended for applications where voltage transients may occur with either polarity-such as across differential data lines or AC-coupled power rails. This eliminates the need for polarity-aware PCB layout.
Is SMBJ54CH AEC-Q101 qualified and what tests does that include?
Yes, SMBJ54CH is AEC-Q101 qualified. This certification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling (TC), highly accelerated stress test (HAST), and electrostatic discharge (ESD) per human-body model (HBM) ≥8kV and machine model (MM) ≥400V. These ensure reliability in automotive under-hood and cabin environments where thermal cycling and electrical noise are severe.
What is the maximum clamping voltage of SMBJ54CH and how is it measured?
The maximum clamping voltage of SMBJ54CH is 96.3 V, measured at 6.5 A peak impulse current (IPP) using a standardized 10/1000 µs double-exponential surge waveform per ANSI/IEEE C62.35. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring protection of 100V-rated components when used with appropriate current-limiting impedance.
Can SMBJ54CH replace unidirectional SMBJ54H in existing designs?
No-SMBJ54CH cannot directly replace unidirectional SMBJ54H without layout review. While both share identical VWM, VBR, and PPK, SMBJ54H requires correct cathode orientation and only clamps in one direction. Using SMBJ54CH in its place removes polarity constraints but may alter system-level surge path behavior, especially in DC-biased rails. Verify clamping symmetry and ground reference integrity before substitution.
Does SMBJ54CH meet halogen-free and RoHS requirements?
Yes, SMBJ54CH complies with both RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molding compound contains no brominated or chlorinated flame retardants, and all terminations use matte tin plating compliant with J-STD-002 solderability standards-ensuring environmental safety and compatibility with lead-free reflow processes.
SMBJ54CH 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
SMBJ54CH FAQ
1.How can I place an order for SMBJ54CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CH 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 SMBJ54CH reliable?
The price and inventory of SMBJ54CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CH is usually 5 days.
3.What payment methods are accepted for SMBJ54CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CH?
SMBJ54CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CH 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 SMBJ54CH?
For technical support, including SMBJ54CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CH requirements.
6.How does Aetrix verify that SMBJ54CH is sourced from the original manufacturer or authorized distributors?
All SMBJ54CH 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 SMBJ54CH meets industry standards.
7.What is the process for return or replacement of SMBJ54CH?
All SMBJ54CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CH, 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 SMBJ54CH part is unused and in its original packaging.
Return procedure for SMBJ54CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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