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Vishay General Semiconductor - Diodes Division P6SMB20AHM3/I
- Part No.:
- P6SMB20AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20AHM3/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,478
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Product details
Overview
P6SMB20AHM3/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 and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB20AHM3/I datasheet, P6SMB20AHM3/I pinout, P6SMB20AHM3/I application, or P6SMB20AHM3/I equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C, unidirectional polarity alignment with DC rail orientation, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The P6SMB20AHM3/I operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to ESD and surge events. Its unidirectional configuration requires cathode-band alignment toward the positive rail, and it exhibits 0.090 %/°C temperature coefficient of VBR, ensuring predictable voltage shift over -65 °C to +150 °C operating range.
It is rated for 100 A non-repetitive forward surge current (IFSM) and dissipates 5.0 W under continuous operation at 50 °C ambient on infinite heatsink. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) and 20 °C/W junction-to-lead (RθJL), supporting PCB pad-based thermal management per 0.2" × 0.2" copper layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; sets upper limit for safe DC bias without conduction. |
| VBR (Breakdown min) | 19.0 V - Minimum voltage at which device enters avalanche conduction at 1 mA test current; defines lower bound of clamping onset. |
| VC (Clamping max) | 27.7 V - Maximum voltage across device during 21.7 A 10/1000 μs surge; must stay below protected IC's absolute max rating. |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against IEC 61000-4-5 Level 4 surges (4 kV line-earth). |
| IPPM | 21.7 A - Peak pulse current corresponding to VC; used to size series impedance for current limiting in protection circuits. |
| TJ max | +150 °C - Maximum junction temperature; constrains power cycling and long-term reliability in high-ambient environments. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronics; suffix HM3 denotes halogen-free, RoHS-compliant, AEC-Q101 grade. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lowest potential rail; completes current path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surges up to 4 kV without degradation in standard PCB layouts. |
| Glass-passivated junction | Ensures stable leakage performance and long-term reliability under humidity and thermal cycling stress. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-induced popcorn failure. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules and ADAS sensor interfaces requiring extended lifetime under vibration and temperature extremes. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving margin for 3.3 V and 5 V logic-level ICs. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V DC input rails of PLC I/O modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach upstream DC-DC converters. Use Value: Clamps transients to ≤27.7 V, maintaining safe margin below 36 V absolute max rating of typical buck controller ICs. |
Use Scenario: Safeguarding LIN bus or analog sensor outputs (e.g., temperature, pressure) in engine bay ECUs exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp TVS on signal line with cathode to signal, anode to ground, suppressing ±100 V spikes within nanoseconds. Use Value: Sub-1 ns response and 27.7 V clamping prevent latch-up or gate oxide damage in automotive-grade op-amps and transceivers. |
| Consumer Device USB Port Protection | Telecom Equipment DC Feeder Protection |
|
Use Scenario: Adding secondary surge immunity to 5 V USB VBUS lines in smart home hubs after primary fuse and common-mode choke. IC Role / Device Role / Timing Role: Final-stage unidirectional TVS shunting transient energy to ground while preserving 5 V regulation integrity. Use Value: 17.1 V VWM avoids false triggering during 5 V ±5 % tolerance operation; 27.7 V VC stays below USB 2.0 PHY IC's 30 V abs max rating. |
Use Scenario: Protecting -48 V DC feeder inputs in remote radio units (RRUs) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Reverse-biased unidirectional TVS (cathode to -48 V rail) clamping negative-going transients toward ground reference. Use Value: 600 W rating sustains multiple 10/1000 μs surges up to 1.2 kV without parameter drift; halogen-free HM3 construction meets telecom flame-safety standards. |
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 rated for 400 W PPPM and 13.9 A IPPM; no AEC-Q101 qualification. | Lower power handling limits use in high-energy surge environments like industrial motor drives. | Select when cost sensitivity outweighs automotive qualification or 600 W requirement. |
| 1.5SMC20A | Same electrical specs (VWM, VBR, VC), but in larger SMC (DO-214AB) package; higher RθJA (75 °C/W) and 1.5 g weight. | Requires larger PCB footprint and may not fit space-constrained consumer designs. | Choose only if legacy SMC footprint compatibility is mandatory and thermal budget allows. |
Compared with SMAJ20A-E3/5B and 1.5SMC20A, the P6SMB20AHM3/I delivers higher surge robustness in a compact, automotive-qualified package - making it optimal for next-generation embedded systems where board area, reliability, and compliance are co-constrained.
Availability
P6SMB20AHM3/I is available at Aetrix Electronics and suitable for industrial power supply protection, automotive sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 traceability.
Supply support for P6SMB20AHM3/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 high-energy transient suppression in automotive, industrial, and telecom infrastructure, engineered for robustness under repetitive surge stress and stringent environmental qualification.
FAQ
What is the clamping voltage of P6SMB20AHM3/I at its rated peak pulse current?
The P6SMB20AHM3/I has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and ensures predictable overvoltage limiting for downstream components. The P6SMB20AHM3/I maintains this clamping performance across its full operating temperature range when mounted per recommended 0.2" × 0.2" copper pad layout.
Is P6SMB20AHM3/I suitable for automotive applications?
Yes, P6SMB20AHM3/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It undergoes stress testing for temperature cycling, humidity, mechanical shock, and surge endurance required for automotive use - including engine control units, body electronics, and ADAS sensor interfaces. The P6SMB20AHM3/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the P6SMB family.
How does the thermal resistance of P6SMB20AHM3/I affect its surge handling capability?
The P6SMB20AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. At elevated ambient temperatures, its peak pulse power must be derated per Figure 2 in the datasheet - e.g., at 85 °C ambient, PPPM drops to ~420 W. Proper PCB copper pad sizing (0.2" × 0.2") is essential to maintain the P6SMB20AHM3/I within safe thermal limits during repetitive surge events.
What is the meaning of the "HM3/I" suffix in P6SMB20AHM3/I?
In P6SMB20AHM3/I, "HM3" indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction; "I" denotes packaging in 13-inch diameter tape-and-reel format with 3200 units per reel. This differs from "H" (7-inch reel, 750 units) and confirms full compliance with automotive and green electronics directives. The P6SMB20AHM3/I is traceable to Vishay's qualified manufacturing lot records for automotive-grade sourcing.
Can P6SMB20AHM3/I be used in bidirectional configurations?
No, P6SMB20AHM3/I is a unidirectional TVS diode - its cathode band must be oriented toward the positive side of the protected line. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., P6SMB20CA). Using P6SMB20AHM3/I in reverse bias beyond its 17.1 V stand-off voltage risks permanent damage, as it lacks symmetrical avalanche characteristics. Always verify polarity alignment before integrating the P6SMB20AHM3/I into circuit designs.
P6SMB20AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for P6SMB20AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20AHM3/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/I reliable?
The price and inventory of P6SMB20AHM3/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/I is usually 5 days.
3.What payment methods are accepted for P6SMB20AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20AHM3/I?
P6SMB20AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20AHM3/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/I?
For technical support, including P6SMB20AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20AHM3/I requirements.
6.How does Aetrix verify that P6SMB20AHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20AHM3/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/I meets industry standards.
7.What is the process for return or replacement of P6SMB20AHM3/I?
All P6SMB20AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20AHM3/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/I part is unused and in its original packaging.
Return procedure for P6SMB20AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20AHM3/I Tags
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