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Taiwan Semiconductor Corporation SMBJ170H
- Part No.:
- SMBJ170H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170H.pdf
- Description:
- 600W, 210V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,724
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Product details
Overview
SMBJ170H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a 170V working stand-off voltage (VWM), 189–231V breakdown voltage (VBR), and 304V maximum clamping voltage (VC) at 2.0A peak pulse current (IPP); designed for automotive-grade inductive load and ESD protection in power supply rails and interface lines.
For engineers reviewing the SMBJ170H datasheet, SMBJ170H pinout, SMBJ170H application, or SMBJ170H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, DO-214AA (SMB) package compatibility, and forward voltage of 5.0V at 50A surge.
Technical Context
The SMBJ170H implements a glass-passivated silicon junction optimized for fast transient suppression with sub-1.0ps response time and <1μA blocking leakage above 10V. Its thermal design supports 150°C max junction temperature and 10°C/W junction-to-case resistance, enabling reliable operation in high-ambient automotive and industrial environments.
Rated for 600W non-repetitive peak impulse power (10/1000µs waveform), it delivers 304V clamping at 2.0A IPP while maintaining 170V DC stand-off - balancing high-voltage tolerance with low-leakage stability across -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR min/max | 189–231V @ 1mA - Verified breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPP | 304V @ 2.0A - Clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 1/2a/2b events. |
| PPK | 600W - Peak pulse power rating (10/1000µs) determines survivability against high-energy surges. |
| VF @ 50A | 5.0V - Forward voltage under 50A 8.3ms half-sine surge confirms robust surge handling for unidirectional use. |
| ID @ VWM | <1μA - Ultra-low leakage preserves system efficiency and prevents false triggering in high-impedance circuits. |
| TJ max | +150°C - Enables deployment in under-hood automotive modules and industrial motor drives without derating. |
Pinout & Package
Package: DO-214AA (SMB) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected circuit ground or low-side return path during surge conduction. |
| Cathode | Current exit point in forward bias; marked side | Connected to protected line (e.g., 12V rail, CAN-H, LIN bus); defines unidirectional clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; resists moisture-induced degradation. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) immunity thresholds. |
| Fast response time | <1.0ps - Limits voltage overshoot before clamping engages, protecting sensitive gate drivers and microcontrollers. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related delamination risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach PMICs or MCU power inputs. Use Value: 304V clamping at 2.0A IPP limits rail excursion below 320V, preserving 36V-rated input stages in automotive-grade power management ICs. |
Use Scenario: Analog sensor outputs (e.g., pressure, temp) routed through long harnesses in factory automation. IC Role / Device Role / Timing Role: TVS on signal line (e.g., 0–5V analog output) referenced to local ground to absorb EFT bursts and contact discharge. Use Value: Sub-1.0ps response and <1μA leakage prevent signal distortion and offset drift while meeting IEC 61000-4-4 Level 4 immunity. |
| LED Driver Output Protection | Motor Control Gate Drive Clamp |
Use Scenario: Constant-current LED driver outputs driving high-brightness arrays in outdoor signage. IC Role / Device Role / Timing Role: TVS placed across LED string terminals to suppress inductive kickback from open-circuit faults or hot-plug events. Use Value: 600W PPK rating absorbs single-event energy up to 600mJ (10/1000µs), preventing catastrophic failure of MOSFET switches and current sense resistors. |
Use Scenario: Half-bridge gate drive lines in BLDC motor controllers subjected to shoot-through and Miller-induced spikes. IC Role / Device Role / Timing Role: TVS on high-side gate node (e.g., between HO and VS) to clamp dv/dt-induced voltage overshoot during switching transitions. Use Value: 170V VWM allows safe operation with 100V bus designs while 304V VC prevents gate oxide breakdown in 600V-class IGBTs/MOSFETs. |
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 SMAJ170A | Same DO-214AC (SMA) package; 304V VC @ 2.0A IPP; 170V VWM; but lower PPK (400W) and no AEC-Q101 qualification. | Not suitable for automotive under-hood use; limited to commercial/industrial PCBs with lower surge exposure. | Select when cost sensitivity outweighs automotive qualification and 600W surge headroom is unnecessary. |
| ON Semiconductor 1.5SMC170A | DO-214AB (SMC) package; 304V VC @ 2.0A IPP; 170V VWM; 600W PPK; AEC-Q101 qualified; but 0.09g weight vs. SMBJ170H's 0.090g and higher RθJA (65°C/W vs. 55°C/W). | Requires larger PCB footprint; less thermally efficient in confined spaces; same functional clamping performance. | Choose only if existing SMC footprint is fixed and thermal margin exceeds 10°C/W requirement. |
Compared with SMAJ170A and 1.5SMC170A, SMBJ170H uniquely combines AEC-Q101 qualification, DO-214AA (SMB) compactness, 55°C/W thermal resistance, and full ISO 7637-2 compliance - making it the optimal choice for space-constrained, thermally demanding automotive and industrial TVS deployments.
Availability
SMBJ170H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver output surge suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMBJ170H 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 SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and surface-mount manufacturability in the DO-214AA package.
FAQ
What is the clamping voltage of SMBJ170H and how is it measured?
The SMBJ170H has a maximum clamping voltage (VC) of 304V at 2.0A peak pulse current (IPP), tested with a 10/1000µs waveform per ANSI/IEEE C62.35. This value represents the upper voltage limit imposed on protected circuitry during standardized surge events, ensuring downstream components remain within safe operating limits. The SMBJ170H consistently achieves this clamping performance across its full operating temperature range.
Is SMBJ170H suitable for bidirectional transient protection?
No - SMBJ170H is a unidirectional TVS diode, indicated by the absence of "CH" or "CAH" suffix. It conducts only during reverse-biased overvoltage events and blocks forward current above 5.0V. For bidirectional protection, Taiwan Semiconductor specifies variants such as SMBJ170CH, which provide symmetrical clamping in both polarities and are explicitly designated for bipolar applications.
Does SMBJ170H meet automotive qualification standards?
Yes - SMBJ170H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its construction includes glass-passivated junctions, J-STD-020 Level 1 moisture sensitivity, and 150°C maximum junction temperature - all validated for under-hood and chassis-mounted automotive electronics per industry stress-test protocols.
What is the forward voltage specification for SMBJ170H and why does it matter?
The SMBJ170H has a forward voltage (VF) of 5.0V at 50A, per the 8.3ms single half-sine surge test. This parameter confirms robust surge-handling capability in unidirectional configurations, especially critical when used across DC power rails where forward conduction may occur during severe load-dump events. It distinguishes SMBJ170H from lower-voltage variants (e.g., SMBJ90H, VF = 3.5V) and validates its suitability for high-energy automotive transients.
How does the DO-214AA (SMB) package of SMBJ170H compare to similar TVS packages?
The DO-214AA (SMB) package of SMBJ170H offers a 4.58mm × 3.94mm footprint - smaller than DO-214AB (SMC) and larger than DO-214AC (SMA). It provides optimal balance of surge power handling (600W), thermal resistance (55°C/W), and automated placement compatibility. Unlike SMA, SMB supports higher PPK; unlike SMC, it saves board area while maintaining sufficient copper pad thermal mass for automotive-grade reliability.
SMBJ170H 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 2A
- 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)
SMBJ170H FAQ
1.How can I place an order for SMBJ170H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170H 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 SMBJ170H reliable?
The price and inventory of SMBJ170H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170H is usually 5 days.
3.What payment methods are accepted for SMBJ170H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170H?
SMBJ170H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170H 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 SMBJ170H?
For technical support, including SMBJ170H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170H requirements.
6.How does Aetrix verify that SMBJ170H is sourced from the original manufacturer or authorized distributors?
All SMBJ170H 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 SMBJ170H meets industry standards.
7.What is the process for return or replacement of SMBJ170H?
All SMBJ170H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170H, 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 SMBJ170H part is unused and in its original packaging.
Return procedure for SMBJ170H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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