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Taiwan Semiconductor Corporation P6SMB120A
- Part No.:
- P6SMB120A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB120A.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,822
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Product details
Overview
P6SMB120A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 102 V, breakdown voltage range of 114–126 V, and clamping voltage of 165 V at 3.8 A peak pulse current. It protects DC power rails in switching mode power supplies and adapters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P6SMB120A datasheet, P6SMB120A pinout, P6SMB120A application, or P6SMB120A equivalent, this page delivers verified electrical parameters, DO-214AA package details, clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 55 °C/W), and bidirectional variant compatibility (P6SMB120CA).
Technical Context
The P6SMB120A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown voltage (114 V) at 1 mA test current. Its glass-passivated junction ensures stable leakage (<1 µA at 102 V) and fast response (<1.0 ps rise time from 0 V to VBR(min)).
Designed for automotive and industrial DC line protection, it meets ISO 7637-2 immunity requirements and supports steady-state power dissipation up to 3 W at 25 °C ambient, with junction temperature rated from –55 °C to +150 °C and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 102 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 114 V / 126 V - Breakdown occurs within this range at 1 mA, defining overvoltage trip threshold |
| VC @ IPPM | 165 V at 3.8 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPSM | 600 W - Peak non-repetitive pulse power handling capability |
| IR @ VWM | <1 µA - Ultra-low leakage preserves efficiency in high-impedance bias networks |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance determines derating above 25 °C ambient |
| TJ(max) | +150 °C - Maximum allowable junction temperature for reliable long-term operation |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; polarity is unidirectional, marked by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); conducts avalanche current when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5% for 'A' grade) and low parameter drift over temperature and life |
| ISO 7637-2 compliance | Validated for automotive load-dump and supply-transient immunity (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0 ps rise time enables suppression before sensitive ICs experience overstress |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant manufacturing |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow; simplifies SMT assembly planning |
Applications
| Switching Mode Power Supply (SMPS) | Automotive Infotainment System |
|---|---|
Use Scenario: Protection of 12 V input stage against load dump and battery reversal transients in AC/DC adapters. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and ground to clamp surges before they reach primary-side controller ICs. Use Value: Limits peak voltage to 165 V during 10/1000 µs pulses, preventing damage to MOSFETs and PWM controllers rated ≤200 V. | Use Scenario: Input rail protection in head-unit power modules exposed to ISO 7637-2 Pulse 2b (alternator switch-off) events. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing energy from inductive kickback without forward conduction during normal operation. Use Value: With VWM = 102 V and VC = 165 V, it safeguards 100 V-rated DC-DC converters while maintaining <1 µA leakage at nominal 12 V system voltage. |
| Industrial Motor Drive Control Board | Point-of-Sale (POS) Terminal Power Input |
Use Scenario: DC bus protection in 24 V control logic powering relay drivers and optocouplers. IC Role / Device Role / Timing Role: Fast-acting shunt device that diverts surge current away from microcontroller I/O and isolated gate drivers. Use Value: 600 W peak power rating handles repetitive 500 V/10 µs spikes common in brushed motor commutation noise environments. | Use Scenario: Surge suppression on 5 V/12 V auxiliary power inputs subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary-level transient suppressor mounted at board edge, upstream of LDO regulators and USB interface ICs. Use Value: Low clamping voltage (165 V) and sub-µA leakage ensure no impact on 5 V rail regulation while meeting IEC 61000-4-5 Level 3 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Same DO-214AA package, identical VWM/VBR/VC specs, but from STMicroelectronics; RθJA = 50 °C/W vs. 55 °C/W | Marginally better thermal performance allows slightly higher ambient operation in confined layouts | Select SMBJ120A if tighter thermal budget exists and ST sourcing is preferred |
| P6SMB120CA | Bidirectional variant with same VWM (102 V), symmetrical VBR (±114–126 V), and VC (165 V) | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose P6SMB120CA only when bidirectional clamping is mandated by circuit topology |
Compared with SMBJ120A and P6SMB120CA, the P6SMB120A offers optimal cost-performance balance for unidirectional DC rail protection, with verified ISO 7637-2 compliance and industry-standard DO-214AA footprint-no layout change needed when migrating from legacy SMB series.
Availability
P6SMB120A is available at Aetrix Electronics and suitable for switching mode power supplies, automotive infotainment systems, and industrial motor drive control boards requiring stable component supply and full traceability.
Supply support for P6SMB120A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and MOSFETs since 1979.
The P6SMB series belongs to TSC's high-power surface-mount TVS portfolio, engineered specifically for robust transient immunity in automotive, industrial, and consumer power electronics where reliability under ISO 7637-2 stress is mandatory.
FAQ
What is the maximum clamping voltage of the P6SMB120A under standard 10/1000 µs surge conditions?
The P6SMB120A has a maximum clamping voltage (VC) of 165 V when subjected to its rated peak pulse current of 3.8 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The P6SMB120A maintains this clamping performance across its specified junction temperature range.
Is the P6SMB120A suitable for bidirectional transient protection?
No-the P6SMB120A is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications such as AC lines or floating data buses, the P6SMB120CA variant must be used instead. The P6SMB120A will conduct heavily in forward bias above ~3.5 V, making it unsuitable for symmetrical surge suppression.
What is the standoff voltage (VWM) of the P6SMB120A, and how does it relate to system operating voltage?
The P6SMB120A has a standoff voltage (VWM) of 102 V, meaning it remains non-conductive up to this DC or RMS voltage level. It is designed for use on systems with nominal voltages ≤85 V DC (e.g., 72 V industrial buses or 48 V telecom), providing ≥20% margin above operating voltage to avoid leakage-induced power loss or false triggering.
Does the P6SMB120A meet automotive transient immunity standards?
Yes-the P6SMB120A is explicitly rated to meet ISO 7637-2 for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (alternator field decay), and Pulses 3a/3b (switching noise). Its 600 W peak power rating and fast response (<1.0 ps) make it suitable for front-end protection in automotive ECUs, infotainment units, and body control modules.
What is the thermal resistance and maximum junction temperature specification for the P6SMB120A?
The P6SMB120A has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and a maximum junction temperature (TJ(max)) of +150 °C. These values define its safe operating area: at 25 °C ambient, it can dissipate up to 3 W continuously; derating is required above 25 °C per the published pulse derating curve. The P6SMB120A must be mounted on adequate copper area to maintain thermal performance.
P6SMB120A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB120A FAQ
1.How can I place an order for P6SMB120A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB120A 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 P6SMB120A reliable?
The price and inventory of P6SMB120A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB120A is usually 5 days.
3.What payment methods are accepted for P6SMB120A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB120A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB120A?
P6SMB120A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB120A 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 P6SMB120A?
For technical support, including P6SMB120A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB120A requirements.
6.How does Aetrix verify that P6SMB120A is sourced from the original manufacturer or authorized distributors?
All P6SMB120A 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 P6SMB120A meets industry standards.
7.What is the process for return or replacement of P6SMB120A?
All P6SMB120A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB120A, 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 P6SMB120A part is unused and in its original packaging.
Return procedure for P6SMB120A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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