My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB300AHM3_A/I
- Part No.:
- P6SMB300AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB300AHM3_A/I.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,769
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB300AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 300 V standoff voltage (VWM), 414 V clamping voltage (VC) at 1.45 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial power supplies and automotive control modules.
For engineers reviewing the P6SMB300AHM3_A/I datasheet, P6SMB300AHM3_A/I pinout, P6SMB300AHM3_A/I application, or P6SMB300AHM3_A/I equivalent, key selection criteria include clamping voltage margin relative to protected device breakdown, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This TVS diode operates as a unidirectional clamping device with a glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its 300 V stand-off voltage ensures compatibility with 277 VAC mains-derived DC rails and 28 V automotive systems after derating.
The device uses a low-inductance SMB package with matte tin-plated leads solderable per J-STD-002, and meets MSL Level 1 (260 °C peak reflow). Its 150 °C maximum junction temperature and 0.110 %/°C VBR temperature coefficient support stable operation across extended industrial and automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system operating margin above nominal rail. |
| VBR (Breakdown) | 285–315 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on within ±5 % tolerance. |
| VC (Clamping) | 414 V at IPPM = 1.45 A - Peak voltage seen by protected circuit during 10/1000 μs surge; defines worst-case stress on downstream components. |
| PPPM | 600 W - Sustained transient energy handling capability under standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 3 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; determines required PCB copper area for thermal management. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT; suffix HM3 denotes qualification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); mounting pad layout per Vishay spec: 5.59 mm × 2.159 mm (length × width).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential node; defines polarity for unidirectional clamping action. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 277 VDC bus); conducts surge current to ground when V > VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 2 Ω/12 Ω coupling network surges without parallel staging. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive and industrial environmental compliance mandates without compromising thermal or electrical performance. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero-defect reliability over 15+ year lifetimes. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., relay coil flyback), improving protected IC survival rate. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements prior to assembly. |
Applications
| Industrial AC/DC Power Supply Protection | Automotive 24 V System Surge Clamping |
|---|---|
|
Use Scenario: Protecting rectified 277 VAC input stages and DC-link capacitors against lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor terminals to clamp transients before they reach primary-side controller ICs. Use Value: Limits voltage excursion to ≤414 V during 600 W surges, preventing overvoltage failure of 600 V MOSFETs and electrolytic capacitors rated at 450 V. |
Use Scenario: Safeguarding CAN transceiver power rails and microcontroller I/O lines in commercial vehicle ECUs exposed to ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Standoff-rated TVS on 28 V supply rail upstream of LDO regulators, absorbing repetitive 100 V/500 ms pulses. Use Value: Maintains rail integrity below 414 V clamping threshold while surviving >1000 surge cycles due to AEC-Q101 qualification and low RθJL (20 °C/W). |
| Telecom Base Station DC Feeder Protection | Sensor Signal Line ESD & Surge Suppression |
|
Use Scenario: Shielding -48 V DC feeder inputs in outdoor telecom cabinets from induced surges caused by nearby lightning strikes. IC Role / Device Role / Timing Role: Primary-level TVS on input fuse block, coordinated with secondary GDT or MOV stages for staged energy absorption. Use Value: Provides precise 300 V standoff to avoid nuisance tripping on nominal -48 V × 6 = -288 V float, while clamping to 414 V during 10/1000 μs threats. |
Use Scenario: Guarding analog outputs of pressure/temperature sensors in factory automation PLC modules against cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at 0 V) placed directly at connector interface to suppress ESD and fast transients. Use Value: Delivers sub-1 ns response and 414 V clamping without distorting 4–20 mA loop signals or introducing measurable offset error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ300A-E3/5B | Same VWM (300 V), VC = 488 V at 1.23 A; higher clamping voltage; non-AEC-Q101; RoHS-compliant only (no halogen-free claim). | Lacks automotive qualification and halogen-free certification; suitable for commercial industrial use where AEC-Q101 is not mandated. | Select SMAJ300A-E3/5B only if cost sensitivity outweighs automotive compliance and tighter clamping is acceptable. |
| 1.5SMC300A | Same VWM (300 V), VC = 430 V at 1.4 A; slightly higher clamping; DO-214AB (SMA) package; RθJA = 110 °C/W; no AEC-Q101 option. | Uses larger SMA package (5.3 mm × 4.1 mm), requiring PCB layout change; lower thermal efficiency limits sustained surge duty cycle. | Choose 1.5SMC300A only if existing design uses SMA footprint and AEC-Q101 is unnecessary. |
Compared with SMAJ300A-E3/5B and 1.5SMC300A, P6SMB300AHM3_A/I delivers lower clamping voltage (414 V vs. 430–488 V), superior thermal performance (RθJA = 100 °C/W), and full AEC-Q101/halogen-free compliance-making it the optimal choice for space-constrained, thermally demanding, and automotive-qualified designs.
Availability
P6SMB300AHM3_A/I is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, automotive 24 V control modules, and telecom DC feeder systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for P6SMB300AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and application-specific optimization.
The P6SMB Series is designed for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial, automotive, and telecom systems where robustness, consistency, and regulatory compliance are critical.
FAQ
What is the clamping voltage of P6SMB300AHM3_A/I and how does it protect downstream components?
The P6SMB300AHM3_A/I has a maximum clamping voltage (VC) of 414 V at 1.45 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during a surge event. By limiting transient voltage to ≤414 V, the P6SMB300AHM3_A/I ensures that downstream components-such as 600 V MOSFETs or 450 V electrolytic capacitors-remain within their absolute maximum ratings, preventing catastrophic overvoltage failure. The low incremental surge resistance further minimizes voltage overshoot during fast-rising transients.
Is P6SMB300AHM3_A/I qualified for automotive applications?
Yes, P6SMB300AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB series datasheet (Document Number: 88370, Revision: 09-Jan-2024). The "HM3" designation indicates halogen-free, RoHS-compliant construction combined with full AEC-Q101 stress testing-including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). This makes P6SMB300AHM3_A/I suitable for under-hood and chassis-mounted automotive electronics where zero-defect reliability is mandatory.
What package type does P6SMB300AHM3_A/I use and what are its key mechanical features?
P6SMB300AHM3_A/I uses the SMB (DO-214AA) surface-mount package, measuring 4.57 mm × 3.94 mm × 2.20 mm with a cathode band marking. Key mechanical features include matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, UL 94 V-0 flammability-rated molding compound, and MSL Level 1 rating allowing unlimited floor life and standard 260 °C peak reflow. The recommended mounting pad layout is 5.59 mm × 2.159 mm per terminal, enabling efficient heat dissipation with RθJA = 100 °C/W.
How does the temperature coefficient of VBR affect P6SMB300AHM3_A/I performance in wide-temperature environments?
The P6SMB300AHM3_A/I has a VBR temperature coefficient of +0.110 %/°C, meaning its breakdown voltage increases linearly with junction temperature. At 125 °C, VBR rises ~10.5 % above its 25 °C value (285–315 V), shifting to approximately 315–348 V. This positive drift improves noise immunity at high temperatures but requires verifying that the elevated VBR remains safely below the protected circuit's absolute maximum rating. The coefficient is fully characterized and stable across the -65 °C to +150 °C operating range, ensuring predictable clamping behavior in automotive and industrial deployments.
Can P6SMB300AHM3_A/I be used in bidirectional configurations?
No, P6SMB300AHM3_A/I is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and absence of bidirectional VWM/VBR ranges in its electrical characteristics table. Its cathode band marking and forward conduction capability (VF = 3.5 V at 50 A) confirm polarity-sensitive operation. For bidirectional protection at 300 V, Vishay offers the P6SMB300CA variant-but that part has different VWM (256 V) and VC (430 V) values and is not pin-compatible or functionally interchangeable with P6SMB300AHM3_A/I. Using P6SMB300AHM3_A/I in reverse-biased configurations risks permanent damage.
P6SMB300AHM3_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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 1.45A
- 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)
P6SMB300AHM3_A/I FAQ
1.How can I place an order for P6SMB300AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB300AHM3_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 P6SMB300AHM3_A/I reliable?
The price and inventory of P6SMB300AHM3_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 P6SMB300AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB300AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB300AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB300AHM3_A/I?
P6SMB300AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB300AHM3_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 P6SMB300AHM3_A/I?
For technical support, including P6SMB300AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB300AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB300AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB300AHM3_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 P6SMB300AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB300AHM3_A/I?
All P6SMB300AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB300AHM3_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 P6SMB300AHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB300AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB300AHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
