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Vishay General Semiconductor - Diodes Division P6SMB20AHM3_B/I
- Part No.:
- P6SMB20AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20AHM3_B/I.pdf
- Description:
- 600W,20V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,404
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Product details
Overview
P6SMB20AHM3_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) at 1 mA test current, 27.7 V clamping voltage at 21.7 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the P6SMB20AHM3_B/I datasheet, P6SMB20AHM3_B/I pinout, P6SMB20AHM3_B/I application, or P6SMB20AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device in reverse-biased configuration, triggering when transient voltage exceeds its breakdown threshold (VBR = 19.0–21.0 V). Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1.0 ps), enabling effective suppression of ESD and inductive switching spikes.
The device is rated for 100 A non-repetitive forward surge current (IFSM), supports 5.0 W steady-state power dissipation at 50 °C ambient, and exhibits 0.090 %/°C temperature coefficient of VBR - critical for thermal stability in automotive under-hood environments where junction temperature reaches 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at IT = 1.0 mA - precise voltage threshold at which device transitions to low-impedance clamping state. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 21.7 A - maximum voltage seen by protected circuit during 10/1000 μs transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 μs surge; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | 150 °C - maximum allowable junction temperature; supports operation in AEC-Q101 automotive environments including engine control units. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient; informs PCB pad design (0.2" × 0.2" copper required for rated derating). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (reflow peak 260 °C). Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient voltage clamp output | Connected to protected line; conducts during overvoltage to shunt current to ground or rail. |
| Anode (unbanded end) | Reference node | Typically tied to ground (unidirectional) or floating reference; defines polarity and clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Glass passivated junction | Ensures long-term reliability and stable leakage (<1.0 μA) across temperature and humidity stress conditions. |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment (0.180" × 0.130"). |
| 600 W peak pulse rating | Withstands repeated 10/1000 μs transients at 0.01% duty cycle - sufficient for ISO 7637-2 pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges. |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD events in vehicle cabins and powertrain zones. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and ground, responding within picoseconds to suppress transients above 17.1 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining signal integrity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Safeguarding AC-DC and DC-DC converter inputs against lightning-induced surges and inductive kickback from relays/motors in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V input rail, triggered before upstream regulators or controllers experience overvoltage stress. Use Value: Limits peak voltage to 27.7 V during 21.7 A transients, ensuring downstream components operate within absolute maximum ratings without derating. |
| Consumer Device USB Port | Telecom Line Interface |
Use Scenario: ESD protection on USB 2.0 VBUS and D+/D− lines in portable medical monitors and smart home hubs exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS connected between VBUS and ground, absorbing ±15 kV HBM pulses per IEC 61000-4-2. Use Value: Maintains <1.0 μA leakage at 17.1 V, preventing battery drain in always-on devices while clamping to 27.7 V during discharge events. |
Use Scenario: Surge protection on Ethernet PHY power rails and RS-485 data lines in base station remote radio units subjected to induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level TVS on 3.3 V/5 V bias rails, coordinated with primary GDT or MOV protection to handle residual energy. Use Value: Provides precise 17.1 V clamping threshold and 600 W pulse handling - complements coarse protection without over-clamping sensitive PHY ICs. |
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 not AEC-Q101 qualified; RθJA = 110 °C/W vs. 100 °C/W. | Limited to commercial-grade industrial and consumer use; unsuitable for automotive under-hood deployment. | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs automotive qualification requirements. |
| 1.5SMC20A | Higher package thermal resistance (RθJA = 125 °C/W); same VWM/VBR but lower IPPM (21.2 A vs. 21.7 A); no AEC-Q101 option available. | Designed for legacy through-hole designs; lacks halogen-free and MSL Level 1 reflow compatibility. | Choose only for backward-compatible board replacements where SMB footprint is unavailable and reflow profile constraints do not apply. |
Compared with SMAJ20A-E3/5B and 1.5SMC20A, P6SMB20AHM3_B/I delivers superior thermal performance, automotive qualification, and halogen-free compliance - making it the preferred choice for new AEC-Q101-compliant designs requiring reliable SMT integration and extended temperature operation.
Availability
P6SMB20AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power supplies, consumer USB interfaces, and telecom line protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P6SMB20AHM3_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, precision, and automotive-grade validation.
The P6SMB Series targets high-energy transient suppression in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, automated assembly, and robust performance across -65 °C to +150 °C.
FAQ
What is the clamping voltage of P6SMB20AHM3_B/I at its rated peak pulse current?
The P6SMB20AHM3_B/I has a maximum clamping voltage (VC) of 27.7 V at its rated peak pulse current (IPPM) of 21.7 A under the standard 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 P6SMB20AHM3_B/I maintains this clamping performance across its specified operating temperature range.
Is P6SMB20AHM3_B/I qualified for automotive applications?
Yes, P6SMB20AHM3_B/I is AEC-Q101 qualified, as confirmed by the "HM3_B" suffix and documentation in Vishay's ordering information table (page 3, Document Number 88370). This qualification covers stress tests including temperature cycling, high-temperature operating life, and ESD, validating its use in automotive powertrain, chassis, and body electronics. The P6SMB20AHM3_B/I meets all requirements for under-hood and cabin-mounted modules.
What does the "HM3_B/I" suffix indicate in P6SMB20AHM3_B/I?
The "HM3" denotes halogen-free, RoHS-compliant construction; "B" indicates AEC-Q101 qualification for the 6.8 V to 220 V voltage range; and "I" specifies packaging in 13-inch diameter plastic tape and reel (3200 units per reel). This full suffix confirms P6SMB20AHM3_B/I is a halogen-free, automotive-qualified, high-volume SMT-ready variant - distinct from commercial-grade "E3" or non-AEC "M3" versions.
What is the maximum junction temperature rating for P6SMB20AHM3_B/I?
The P6SMB20AHM3_B/I has a maximum junction temperature (TJ max.) of +150 °C, as specified in the Maximum Ratings table (page 1, Document Number 88370). This rating enables operation in demanding environments such as automotive engine control units and industrial motor drives. Derating curves (Figure 2) define allowable power reduction above 25 °C ambient, and the P6SMB20AHM3_B/I must be mounted on minimum 0.2" × 0.2" copper pads to achieve full thermal performance.
How does P6SMB20AHM3_B/I differ from bidirectional variants like P6SMB20CA?
P6SMB20AHM3_B/I is unidirectional, with cathode marked and intended for clamping between a positive rail and ground; P6SMB20CA is bidirectional, symmetric, and used for AC line or differential signal protection. The P6SMB20AHM3_B/I has VWM = 17.1 V and VBR = 19.0–21.0 V, while P6SMB20CA has VWM = 17.1 V and VBR = ±19.0–21.0 V. Their pinouts are identical, but polarity assignment and application topology differ fundamentally - P6SMB20AHM3_B/I cannot substitute for P6SMB20CA in AC-coupled circuits.
P6SMB20AHM3_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)
P6SMB20AHM3_B/I FAQ
1.How can I place an order for P6SMB20AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20AHM3_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 P6SMB20AHM3_B/I reliable?
The price and inventory of P6SMB20AHM3_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 P6SMB20AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB20AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20AHM3_B/I?
P6SMB20AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20AHM3_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 P6SMB20AHM3_B/I?
For technical support, including P6SMB20AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB20AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20AHM3_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 P6SMB20AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB20AHM3_B/I?
All P6SMB20AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20AHM3_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 P6SMB20AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB20AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20AHM3_B/I Tags
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