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Vishay General Semiconductor - Diodes Division P6SMB20AHM3_A/I
- Part No.:
- P6SMB20AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20AHM3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,704
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Product details
Overview
P6SMB20AHM3_A/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 a 17.1 V stand-off voltage (VWM), 21.0 V minimum breakdown voltage (VBR), 27.7 V maximum clamping voltage (VC) at 21.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P6SMB20AHM3_A/I datasheet, P6SMB20AHM3_A/I pinout, P6SMB20AHM3_A/I application, or P6SMB20AHM3_A/I equivalent, this part delivers AEC-Q101 qualified transient suppression in compact SMB packaging with verified thermal resistance (RθJA = 100 °C/W), low leakage (<1.0 μA at VWM), and halogen-free RoHS compliance - critical for high-reliability board-level ESD and surge protection design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging glass-passivated junction technology for stable avalanche behavior under repetitive surge conditions. Its 10/1000 μs waveform response supports IEC 61000-4-5 Level 3 surge immunity requirements when mounted on 5.0 mm × 5.0 mm copper pads.
The P6SMB20AHM3_A/I exhibits a temperature coefficient of VBR of +0.090 %/°C and is rated for continuous operation from −65 °C to +150 °C junction temperature. It meets MSL level 1 per J-STD-020 with peak reflow temperature up to 260 °C, enabling compatibility with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Min) | 19.0 V - Minimum breakdown voltage at 1.0 mA test current; ensures consistent avalanche initiation across production lots. |
| VC (Max @ IPPM) | 27.7 V - Maximum clamped voltage at 21.7 A peak pulse current; determines worst-case overvoltage seen by protected circuitry. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports single-event surge energy absorption without failure. |
| IPPM | 21.7 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs derating curves above 25 °C ambient for sustained power dissipation. |
| TJ max | +150 °C - Maximum junction temperature; sets upper limit for thermal design margin in enclosed or high-temperature environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; forms current path during reverse-biased clamping event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail or signal input); carries full surge current into anode during transient. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - enables use in engine control and ADAS modules. |
| 600 W peak pulse power | Supports IEC 61000-4-5 1 kV/2 Ω surge testing on 24 V systems without degradation after repeated events. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement into reflow ovens without baking - reduces manufacturing overhead. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD 22-B102, supporting lead-free assembly with consistent wetting and joint integrity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp spikes up to ±120 V. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤27.7 V, preventing latch-up or gate oxide damage. |
Use Scenario: Protecting analog inputs of 4–20 mA current-loop sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated clamping device on signal line to shunt induced transients before reaching precision amplifier inputs. Use Value: Maintains signal integrity by limiting excursion to <28 V while adding <1.0 μA leakage at 17.1 V - no impact on loop accuracy. |
| Consumer Power Adapter Output Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding USB-C PD port output stages against ESD and accidental AC coupling events. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor on VBUS line, positioned upstream of load switch. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within <1 ns, with VC well below MOSFET drain-source breakdown ratings. |
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element on DC bias lines feeding magnetics or data transformers. Use Value: Absorbs 600 W surge energy without thermal runaway, validated for 0.01 % duty cycle repetitive operation per spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/5B | Same VWM (17.1 V), identical SMB package, but non-AEC-Q101 and not halogen-free; RθJA = 110 °C/W. | Limited to commercial-grade consumer/industrial designs where automotive qualification is not required. | Select when cost sensitivity outweighs automotive reliability requirements and thermal margin permits higher RθJA. |
| 1.5SMC20A | Higher package thermal resistance (RθJA = 125 °C/W), same VWM/VC, but DO-214AB (SMC) package - 30 % larger footprint. | Requires PCB redesign due to larger SMC outline; suitable only where space allows and higher surge margin is needed. | Choose only if legacy SMC footprint compatibility is mandatory and 600 W rating must be retained in larger form factor. |
Compared with SMAJ20A-E3/5B and 1.5SMC20A, the P6SMB20AHM3_A/I provides tighter thermal performance, automotive qualification, and halogen-free compliance in the smallest standardized SMB footprint - making it optimal for space-constrained, high-reliability 24 V system designs.
Availability
P6SMB20AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.
Supply support for P6SMB20AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets robust transient suppression in automotive, industrial, and telecom infrastructure - engineered for high-energy surge handling, low clamping voltage, and seamless integration into automated SMT production lines.
FAQ
What is the maximum clamping voltage of the P6SMB20AHM3_A/I under specified surge conditions?
The P6SMB20AHM3_A/I has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated 21.7 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with device mounted on 5.0 mm × 5.0 mm copper pads per datasheet condition. The P6SMB20AHM3_A/I maintains this clamping performance across its full operating temperature range, supporting predictable overvoltage protection in demanding environments.
Is the P6SMB20AHM3_A/I qualified for automotive applications?
Yes, the P6SMB20AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB series datasheet (Rev. 09-Jan-2024, Doc. #88370). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and surge endurance per automotive reliability standards. The P6SMB20AHM3_A/I is approved for use in engine control units, body electronics, and ADAS subsystems where transient immunity and long-term stability are critical.
What does the "HM3" suffix indicate in P6SMB20AHM3_A/I?
The "HM3" suffix in P6SMB20AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates halogen-free molding compound, "M3" confirms RoHS compliance and JESD201 Class 2 whisker resistance, and the "_A/I" specifies tape-and-reel packaging in 13-inch reels (3200 units per reel). This distinguishes the P6SMB20AHM3_A/I from commercial-grade variants like E3 or M3 without automotive qualification.
How does the thermal resistance of the P6SMB20AHM3_A/I affect its surge capability?
The P6SMB20AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, which directly impacts its ability to sustain repetitive surges. At elevated ambient temperatures, its peak pulse power must be derated per Figure 2 in the datasheet - for example, at 85 °C ambient, usable PPPM drops to ~420 W. This thermal behavior is integral to designing reliable protection circuits, and the P6SMB20AHM3_A/I's low RθJA enables higher duty-cycle operation than alternatives with higher thermal resistance.
Can the P6SMB20AHM3_A/I replace bidirectional TVS diodes in circuit designs?
No, the P6SMB20AHM3_A/I is strictly unidirectional and must not be substituted for bidirectional TVS diodes such as P6SMB20CA without circuit revision. Its cathode-band polarity requires correct orientation relative to DC bias direction; reverse installation causes forward conduction and failure. Bidirectional variants have symmetric breakdown in both directions and no polarity marking. Using the P6SMB20AHM3_A/I in place of a bidirectional device would leave the circuit unprotected during positive-going transients on grounded lines.
P6SMB20AHM3_A/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:
- Obsolete
- 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)
P6SMB20AHM3_A/I FAQ
1.How can I place an order for P6SMB20AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20AHM3_A/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 P6SMB20AHM3_A/I reliable?
The price and inventory of P6SMB20AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB20AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20AHM3_A/I?
P6SMB20AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20AHM3_A/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 P6SMB20AHM3_A/I?
For technical support, including P6SMB20AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB20AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20AHM3_A/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 P6SMB20AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB20AHM3_A/I?
All P6SMB20AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20AHM3_A/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 P6SMB20AHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB20AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20AHM3_A/I Tags
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