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Taiwan Semiconductor Corporation SMBJ17H
- Part No.:
- SMBJ17H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17H.pdf
- Description:
- 600W, 21V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,362
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Product details
Overview
SMBJ17H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 17 V working stand-off voltage (VWM), 18.9–23.1 V breakdown voltage (VBR @ 1 mA), 30.5 V maximum clamping voltage (VC) at 20 A peak pulse current, and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ17H datasheet, SMBJ17H pinout, SMBJ17H application, or SMBJ17H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification for automotive use, low leakage (<1 µA @ 17 V), and compatibility with automated SMT assembly on 12 V–24 V DC systems.
Technical Context
The SMBJ17H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (18.9–23.1 V). Its glass-passivated junction ensures stable breakdown behavior and low leakage across temperature (-55°C to +150°C).
It delivers 600 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal resistance of 10°C/W (junction-to-case) and 55°C/W (junction-to-ambient), enabling reliable operation in constrained PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets system rail margin for 12 V nominal circuits. |
| VBR min/max | 18.9 V / 23.1 V @ 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPP | 30.5 V @ 20 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels in 24 V systems. |
| PPK | 600 W - Peak pulse power handling per single transient; meets ISO 7637-2 Pulse 1 (inductive load dump) requirements. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off; minimizes standby power loss in battery-backed modules. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement without derating. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; enables unidirectional clamping from rail to GND. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply); conducts surge current to ground when VRAIL > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Glass-passivated junction | Ensures stable VBR tolerance and low IR drift over lifetime; eliminates passivation-related failure modes in humid environments. |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry can be damaged; critical for CAN/LIN bus node protection. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump coupling), and Pulse 3a/3b (capacitive coupling) waveforms. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤30.5 V during 600 W surges, protecting LDOs and microcontrollers rated for 36 V absolute max. |
Use Scenario: 4–20 mA current loop transmitters interfacing with PLC analog inputs. IC Role / Device Role / Timing Role: Primary surge clamp on signal line before precision op-amp input stage. Use Value: Sub-1 ps response prevents latch-up in instrumentation amplifiers during EFT bursts per IEC 61000-4-4. |
| LED Lighting Driver Input Protection | Automotive LIN Bus Node Protection |
Use Scenario: Constant-current LED drivers powered from vehicle battery with PWM dimming. IC Role / Device Role / Timing Role: Front-end TVS on DC input before buck controller IC. Use Value: Withstands repetitive 10/1000 µs pulses up to 600 W without degradation, maintaining luminance stability. |
Use Scenario: LIN transceiver ICs in door modules subjected to cable discharge events. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ17H used in unidirectional rail-to-ground configuration. Use Value: Low 17 V VWM allows clamping before LIN PHY damage threshold (~40 V), while <1 µA leakage avoids bias error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ17A | Same DO-214AC (SMA) package; 17 V VWM, but 33.2 V VC @ 17.3 A; 400 W PPK rating. | Lower peak power handling reduces margin against severe ISO 7637-2 Pulse 1 events. | Select when board space permits SMA footprint and system surge energy is ≤400 W. |
| ON Semiconductor 1.5SMC17A | DO-214AB (SMC) package; 17 V VWM, 33.2 V VC @ 17.3 A; 1500 W PPK rating. | Larger SMC package occupies ~2.5× PCB area; higher clamping voltage increases downstream stress. | Choose for higher-energy transients where layout allows larger footprint and thermal mass. |
Compared with SMAJ17A and 1.5SMC17A, the SMBJ17H offers optimal balance of 600 W surge capacity, compact DO-214AA footprint, and AEC-Q101 qualification-making it preferred for space-constrained automotive modules requiring validated reliability.
Availability
SMBJ17H is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, LED driver inputs, and LIN bus node designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ17H 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 developed specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive subsystems, emphasizing robust clamping, low leakage, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBJ17H at its rated peak pulse current?
The SMBJ17H has a maximum clamping voltage (VC) of 30.5 V when subjected to a 10/1000 µs surge waveform at 20 A peak pulse current (IPP). This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during standardized transients such as ISO 7637-2 Pulse 1, ensuring downstream components remain within safe operating limits.
Is SMBJ17H suitable for bidirectional transient protection?
No, SMBJ17H is a unidirectional TVS diode intended for rail-to-ground clamping only. For bidirectional applications, Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., SMBJ17CH). Using SMBJ17H in reverse-biased configurations risks permanent breakdown due to lack of symmetric avalanche capability.
Does SMBJ17H meet automotive qualification standards?
Yes, SMBJ17H is AEC-Q101 qualified and tested per the full stress test schedule, including HTGB, H3TRB, temperature cycling, and ESD. It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements, making it suitable for under-hood and body-control module deployments.
What is the maximum leakage current of SMBJ17H at its working voltage?
At its 17 V working stand-off voltage (VWM), the SMBJ17H exhibits a maximum blocking leakage current (ID) of 1 µA at TA = 25°C. This ultra-low leakage preserves battery life in always-on automotive modules and avoids signal offset errors in precision analog front-ends.
What package type does SMBJ17H use, and is it compatible with standard SMT processes?
SMBJ17H uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads that comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Its dimensions and lead finish are fully compatible with standard reflow profiles and high-speed pick-and-place equipment.
SMBJ17H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SMBJ17H FAQ
1.How can I place an order for SMBJ17H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17H 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 SMBJ17H reliable?
The price and inventory of SMBJ17H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17H is usually 5 days.
3.What payment methods are accepted for SMBJ17H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17H?
SMBJ17H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17H 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 SMBJ17H?
For technical support, including SMBJ17H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17H requirements.
6.How does Aetrix verify that SMBJ17H is sourced from the original manufacturer or authorized distributors?
All SMBJ17H 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 SMBJ17H meets industry standards.
7.What is the process for return or replacement of SMBJ17H?
All SMBJ17H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17H, 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 SMBJ17H part is unused and in its original packaging.
Return procedure for SMBJ17H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17H Tags
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