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Vishay General Semiconductor - Diodes Division P6SMB20CAHM3_A/H
- Part No.:
- P6SMB20CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
P6SMB20CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 20 V standoff voltage (VWM), 22.8–25.2 V breakdown voltage (VBR) at 1 mA test current, 27.7 V maximum clamping voltage at 21.7 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P6SMB20CAHM3_A/H datasheet, P6SMB20CAHM3_A/H pinout, P6SMB20CAHM3_A/H application, or P6SMB20CAHM3_A/H equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification status, SMB (DO-214AA) package compatibility, thermal resistance (RθJA = 100 °C/W), and compliance with J-STD-020 MSL level 1 reflow profile.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering consistent clamping behavior during positive and negative transients without polarity marking. Its glass-passivated junction ensures stable leakage and fast response time (<1 ns), while low incremental surge resistance enables effective energy diversion under repetitive 0.01% duty cycle surges.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2 of the datasheet. It meets JESD201 Class 2 whisker resistance and is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirming suitability for automotive-grade PCBs requiring long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - guaranteed voltage range where device enters avalanche conduction; ensures predictable turn-on timing. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 21.7 A - peak voltage seen by protected circuit during 10/1000 μs transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy dissipation capability with standard 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 immunity. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient air on standard 0.2" × 0.2" copper pads; informs board-level thermal design requirements. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm length, 3.94 mm width, and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No functional distinction between terminals; either lead conducts during positive or negative overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| 600 W peak pulse power | Supports robust IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly designed layouts. |
| AEC-Q101 qualification | Validates reliability for automotive environments including temperature cycling, humidity bias, and mechanical shock. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green electronics. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to limit transient voltage before reaching sensitive IC inputs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ±8 kV contact discharge without latch-up or parametric shift. |
Use Scenario: Safeguarding RS-485/RS-232 communication ports and PLC analog input channels against lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Primary front-end TVS on field-side traces, coordinated with GDT or MOV for staged protection architecture. Use Value: Limits clamped voltage to ≤27.7 V during 10/1000 μs surges up to 21.7 A, preventing damage to TI THVD1550 or Analog Devices ADM3485E transceivers. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on 12–24 V DC outputs of wall adapters and USB-C PD power supplies. IC Role / Device Role / Timing Role: Fast-response clamp parallel to output capacitor, absorbing residual transients escaping primary-side MOVs. Use Value: Prevents overvoltage stress on downstream DC-DC converters (e.g., TPS54332) during hot-plug or cable discharge events. |
Use Scenario: Protection of Ethernet PHY interfaces and DSL line drivers exposed to induced surges on outdoor telecom wiring. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed before magnetics or transformer-coupled inputs. Use Value: Delivers <100 pF junction capacitance at zero bias (per Fig. 4), preserving signal integrity up to 100 Mbps Ethernet bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (20 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (32.4 V at 12.3 A); SMB package identical. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification or 600 W surge headroom. |
| SMCJ20CA | Higher PPPM (1500 W), same VWM and bidirectional function, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm). | Requires PCB layout change; suited for high-energy industrial mains coupling or rail applications. | Choose when system-level surge testing exceeds 600 W and board space allows larger footprint. |
Compared with SMAJ20CA and SMCJ20CA, P6SMB20CAHM3_A/H uniquely balances AEC-Q101 qualification, 600 W surge capacity, and compact SMB footprint - making it optimal for space-constrained automotive and industrial edge nodes where qualification and reliability are non-negotiable.
Availability
P6SMB20CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB20CAHM3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for robustness under repetitive surge stress and extended temperature operation.
FAQ
What does the "CA" suffix mean in P6SMB20CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB20CAHM3_A/H provides symmetrical clamping for both positive and negative voltage transients without polarity orientation constraints. This differs from unidirectional variants (e.g., P6SMB20A), which require correct cathode/anode placement and only protect one polarity.
Is P6SMB20CAHM3_A/H suitable for automotive applications?
Yes, P6SMB20CAHM3_A/H is AEC-Q101 qualified (indicated by the "HM3" suffix), confirming validation across temperature cycling, humidity bias, mechanical shock, and other stress tests required for automotive electronics. It is commonly deployed in body control modules, ADAS sensor interfaces, and infotainment power rails.
What is the maximum clamping voltage of P6SMB20CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of P6SMB20CAHM3_A/H is 27.7 V at a peak pulse current (IPPM) of 21.7 A with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuits during transient events.
Does P6SMB20CAHM3_A/H require special PCB layout considerations?
Yes - Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal performance and 600 W pulse power. Smaller pads increase junction temperature and reduce surge capability; thermal vias under pads further improve heat dissipation in high-reliability designs.
How does the "HM3" suffix differ from "E3" or "M3" in P6SMB20CAHM3_A/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from "E3" (RoHS-compliant commercial grade) and "M3" (halogen-free RoHS-compliant commercial grade). Only HM3 and HE3 variants carry automotive qualification, confirmed in the ordering information table on page 3 of document 88370.
P6SMB20CAHM3_A/H 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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB20CAHM3_A/H FAQ
1.How can I place an order for P6SMB20CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHM3_A/H 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 P6SMB20CAHM3_A/H reliable?
The price and inventory of P6SMB20CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHM3_A/H?
P6SMB20CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHM3_A/H 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 P6SMB20CAHM3_A/H?
For technical support, including P6SMB20CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB20CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHM3_A/H 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 P6SMB20CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHM3_A/H?
All P6SMB20CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHM3_A/H, 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 P6SMB20CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB20CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CAHM3_A/H Tags
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