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Vishay General Semiconductor - Diodes Division P6SMB20AHM3_A/H
- Part No.:
- P6SMB20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20AHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB20AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), and 27.7 V clamping voltage (VC) at 21.7 A peak pulse current (IPPM), designed to protect power rails and signal lines in automotive and industrial electronics against ESD and inductive switching transients.
For engineers reviewing the P6SMB20AHM3_A/H datasheet, P6SMB20AHM3_A/H pinout, P6SMB20AHM3_A/H application, or P6SMB20AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a unidirectional clamp with cathode-band polarity marking, leveraging glass-passivated junction technology for stable reverse leakage (<1.0 μA at 17.1 V) and fast response time (<1.0 ns). Its 600 W peak pulse power rating (10/1000 μs waveform) is derated above 25 °C per Fig. 2, with maximum junction temperature of +150 °C and MSL Level 1 moisture sensitivity.
The device meets JESD201 Class 2 whisker resistance and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - indicated by the HM3 suffix and revision code "A/H". It is not bidirectional; no CA suffix is present, and electrical characteristics apply only in reverse-biased (clamping) mode.
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 DC/AC rail margin. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA test current - Voltage at which device enters avalanche conduction; tight tolerance ensures predictable turn-on. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 21.7 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines downstream IC survivability. |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capability under standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 threats. |
| ID (Reverse Leakage) | <1.0 μA at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; requires minimum 0.2" × 0.2" copper pads for rated power dissipation. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients like ISO 7637-2 Pulse 5a without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where long-term reliability under thermal stress is mandatory. |
| Glass passivated junction | Ensures stable VBR and low leakage across -65 °C to +150 °C operating range; resists humidity-induced parameter drift. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and chassis ground to limit voltage excursions below IC absolute maximum ratings. Use Value: Clamps to 27.7 V at 21.7 A, ensuring downstream regulators and microcontrollers remain within safe operating area during 100 V/50 ms load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential or single-ended signal lines upstream of ADC inputs. Use Value: Sub-1 μA leakage at 17.1 V preserves signal integrity; fast <1 ns response prevents latch-up in precision front-end amplifiers. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras) against surges entering via 48 V DC input ports. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail, coordinated with upstream fuse and secondary filtering. Use Value: 600 W rating handles repeated 10/1000 μs surges up to 21.7 A without degradation; RθJA = 100 °C/W allows thermal design with minimal copper area. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Flyback energy diversion device across motor terminals or H-bridge outputs. Use Value: 100 A IFSM rating withstands repetitive 8.3 ms half-sine surges; unidirectional polarity avoids forward conduction during normal commutation. |
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), VC = 32.4 V at 18.5 A; lower PPPM (400 W); non-AEC-Q101; SMA package (larger footprint). | Limited to commercial-grade industrial or consumer use; unsuitable for automotive under-hood environments. | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable. |
| 1.5SMC20A | Same VWM/VC specs but in larger SMC (DO-214AB) package; RθJA = 60 °C/W; AEC-Q101 not specified; 1.5 kW PPPM rating. | Better thermal performance but incompatible with dense SMB-layout PCBs; requires layout redesign. | Choose when board space permits and higher surge margin (1.5 kW) is needed for harsher environments. |
Compared with SMAJ20A-E3/5B and 1.5SMC20A, P6SMB20AHM3_A/H delivers AEC-Q101 assurance in the smallest qualified SMB footprint, with optimized clamping (27.7 V) and thermal behavior (RθJA = 100 °C/W) for space-constrained automotive modules.
Availability
P6SMB20AHM3_A/H is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB20AHM3_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, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, with design focus on AEC-Q101 compliance, low-profile SMT compatibility, and precise clamping performance across wide temperature ranges.
FAQ
What is the clamping voltage of P6SMB20AHM3_A/H at its rated peak pulse current?
The P6SMB20AHM3_A/H has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is critical for ensuring protected ICs remain below their absolute maximum voltage ratings during surge events, and it is verified per Figure 1 and Table on page 2 of Vishay document 88370.
Is P6SMB20AHM3_A/H suitable for automotive applications?
Yes, P6SMB20AHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix and revision code "A/H" in the ordering information (page 3 of document 88370). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC standards, making it appropriate for under-hood and body-control module applications.
What does the "HM3" suffix indicate in P6SMB20AHM3_A/H?
The "HM3" suffix in P6SMB20AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering guide (page 3), HM3 parts meet JESD201 Class 2 whisker resistance and are rated for peak reflow temperatures up to 260 °C, distinguishing them from commercial-grade E3/M3 variants.
How does the SMB (DO-214AA) package of P6SMB20AHM3_A/H affect thermal performance?
The SMB package of P6SMB20AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per Figure 5 and Table on page 3. This requires careful PCB layout with adequate copper area to maintain junction temperature ≤150 °C under sustained 5.0 W power dissipation or repetitive surge conditions.
Can P6SMB20AHM3_A/H be used in bidirectional configurations?
No, P6SMB20AHM3_A/H is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number and explicit listing under "unidirectional" in the PRIMARY CHARACTERISTICS table (page 1). Bidirectional variants (e.g., P6SMB20CA) have different breakdown symmetry and are marked separately; using P6SMB20AHM3_A/H in reverse-biased AC paths would result in forward conduction and failure.
P6SMB20AHM3_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:
- 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/H FAQ
1.How can I place an order for P6SMB20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20AHM3_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 P6SMB20AHM3_A/H reliable?
The price and inventory of P6SMB20AHM3_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 P6SMB20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20AHM3_A/H?
P6SMB20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20AHM3_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 P6SMB20AHM3_A/H?
For technical support, including P6SMB20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20AHM3_A/H requirements.
6.How does Aetrix verify that P6SMB20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB20AHM3_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 P6SMB20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB20AHM3_A/H?
All P6SMB20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20AHM3_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 P6SMB20AHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20AHM3_A/H Tags
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