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Vishay General Semiconductor - Diodes Division P6SMB20AHE3_B/I
- Part No.:
- P6SMB20AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20AHE3_B/I.pdf
- Description:
- 600W,20V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,904
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Product details
Overview
P6SMB20AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 27.7 V clamping voltage at 21.7 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the P6SMB20AHE3_B/I datasheet, P6SMB20AHE3_B/I pinout, P6SMB20AHE3_B/I application, or P6SMB20AHE3_B/I equivalent, key selection criteria include unidirectional clamping behavior, 27.7 V max clamping under 21.7 A surge, SMB package thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with ≤1.0 μA leakage at 17.1 V, then rapidly avalanches when transient voltage exceeds 19.0–21.0 V (VBR at 1 mA). Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
It delivers 600 W peak pulse power per 10/1000 μs waveform with 0.01% duty cycle, derated above 25 °C per Fig. 2, and supports 100 A non-repetitive forward surge (8.3 ms half-sine) - critical for protecting MOSFET gates and IC power rails against load-switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 17.1 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold. |
| VBR (Breakdown) | 19.0–21.0 V at 1 mA - Confirmed avalanche initiation range; defines minimum overvoltage triggering point. |
| VC (Clamping) | 27.7 V at 21.7 A - Maximum voltage seen by protected circuit during 10/1000 μs transient; determines downstream component stress. |
| PPPM | 600 W - Peak transient energy absorption capability; validates protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" pads; informs derating for sustained power dissipation. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 molding compound. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional configuration; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to line being protected (e.g., 12 V rail); blocks normal operation up to 17.1 V, then conducts during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against high-energy transients like ISO 7637-2 Pulse 1/2a/5a without derating penalties. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 μA), and long-term reliability under thermal cycling. |
| AEC-Q101 qualified (HE3_B suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect field performance. |
| SMB (DO-214AA) package | Supports high-density PCB layouts and automated placement; thermal pad design (5.0 mm × 5.0 mm) optimizes surge energy dissipation. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream ICs-critical for 3.3 V/5 V logic and automotive microcontrollers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and inductive switching transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits voltage to ≤27.7 V during 10/1000 μs surges, preventing damage to 32-bit MCUs and CAN transceivers rated for 36 V absolute max. |
Use Scenario: Protecting analog outputs (e.g., 4–20 mA current loops) of industrial pressure sensors exposed to EFT and surge events. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy away from precision op-amp output stages and ADC inputs. Use Value: Maintains signal integrity with <1 μA leakage at 17.1 V and fast response (<1 ns), avoiding baseline shift or measurement error. |
| Consumer Device USB Port Protection | Telecom DC Power Input Protection |
|
Use Scenario: Safeguarding USB VBUS lines in portable chargers and docking stations against hot-plug and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 8 kV contact ESD (IEC 61000-4-2) and 10/1000 μs surges on 5 V supply rails. Use Value: Clamps to 27.7 V while delivering 600 W peak power-prevents latch-up in USB controller ICs without sacrificing efficiency. |
Use Scenario: Shielding -48 V DC telecom power inputs from lightning-induced surges in remote radio units and base station cabinets. IC Role / Device Role / Timing Role: Primary-stage unidirectional TVS in series with upstream fuse and downstream DC/DC converter. Use Value: Withstands repetitive 600 W pulses and operates up to +150 °C ambient-ensures uptime in sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/5B | Same VWM (17.1 V), identical SMB package, but only commercial-grade (not AEC-Q101 qualified); RθJA = 110 °C/W. | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and thermal margin allows higher RθJA. |
| 1.5SMC20A | Higher package thermal resistance (RθJA = 120 °C/W), same VWM/VC, but DO-214AB (SMC) package - 30% larger footprint than SMB. | Requires PCB layout change; better suited for high-temperature ambient designs needing lower power density. | Choose only if existing SMC footprint is fixed and thermal derating can accommodate 120 °C/W. |
Compared with SMAJ20A-E3/5B and 1.5SMC20A, P6SMB20AHE3_B/I uniquely combines AEC-Q101 qualification, SMB footprint compactness, and 100 °C/W thermal resistance-making it the preferred choice for space-constrained automotive modules requiring zero-defect field performance.
Availability
P6SMB20AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and high-volume SMT manufacturability.
Supply support for P6SMB20AHE3_B/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom systems-designed specifically for robust clamping performance in harsh environments with minimal PCB area.
FAQ
What is the clamping voltage of P6SMB20AHE3_B/I at its rated peak pulse current?
The P6SMB20AHE3_B/I has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB20AHE3_B/I maintains this clamping performance across its specified operating temperature range and is validated for repetitive surge duty cycles up to 0.01%.
Is P6SMB20AHE3_B/I suitable for automotive applications?
Yes, P6SMB20AHE3_B/I is AEC-Q101 qualified, as confirmed by the "HE3_B" suffix in its ordering code and documented in Vishay's P6SMB Series datasheet revision 09-Jan-2024. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and ESD-to meet automotive reliability standards. The P6SMB20AHE3_B/I is explicitly recommended for under-hood and body-control module applications where junction temperatures reach +150 °C.
What does the "_B/I" suffix mean in P6SMB20AHE3_B/I?
The "_B" denotes AEC-Q101 qualification for the P6SMB20AHE3_B/I series (applicable to 6.8 V–220 V variants), while "_I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This format supports high-speed SMT placement and is traceable per Vishay's manufacturing lot coding. The "HE3" portion confirms RoHS-compliant, AEC-Q101-qualified construction with matte tin plating meeting J-STD-002 solderability standards.
How does P6SMB20AHE3_B/I compare to bidirectional TVS diodes like P6SMB20CA?
P6SMB20AHE3_B/I is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward protected line), whereas P6SMB20CA is bidirectional and used in AC or floating signal paths. The P6SMB20AHE3_B/I offers lower leakage (<1 μA at 17.1 V) and higher surge current rating (21.7 A vs. 20.5 A for P6SMB20CA) due to optimized unidirectional junction design. Its clamping voltage remains identical (27.7 V), but polarity awareness must be maintained in layout.
What is the thermal resistance of P6SMB20AHE3_B/I, and how does it affect layout?
The P6SMB20AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay's datasheet Figure 2. This value assumes minimum recommended pad layout; reducing pad size increases RθJA and requires derating of peak pulse power above 25 °C. For reliable operation in automotive applications, maintain full copper pour under both terminals and avoid thermal isolation.
P6SMB20AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB20AHE3_B/I FAQ
1.How can I place an order for P6SMB20AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20AHE3_B/I 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 P6SMB20AHE3_B/I reliable?
The price and inventory of P6SMB20AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20AHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB20AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20AHE3_B/I?
P6SMB20AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20AHE3_B/I 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 P6SMB20AHE3_B/I?
For technical support, including P6SMB20AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20AHE3_B/I requirements.
6.How does Aetrix verify that P6SMB20AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20AHE3_B/I 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 P6SMB20AHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB20AHE3_B/I?
All P6SMB20AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20AHE3_B/I, 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 P6SMB20AHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB20AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20AHE3_B/I Tags
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