My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T150A-E3/5B
;;2.jpg)
- Part No.:
- SM6T150A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150A-E3/5B.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,669
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T150A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 128 V stand-off voltage (VWM), 143–158 V breakdown voltage (VBR at 1 mA), 207 V maximum clamping voltage (VC) at 2.9 A peak pulse current, 600 W peak pulse power (10/1000 μs), and operates from −65 °C to +150 °C junction temperature - used for protecting MOSFETs and sensor interfaces in automotive power systems.
For engineers reviewing the SM6T150A-E3/5B datasheet, SM6T150A-E3/5B pinout, SM6T150A-E3/5B application, or SM6T150A-E3/5B equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, peak pulse current capability under system-level surge stress (e.g., ISO 7637-2 Pulse 1/2a/5a), thermal resistance (RθJA = 100 °C/W), and AEC-Q101 qualification status for automotive deployment.
Technical Context
The SM6T150A-E3/5B is a unidirectional silicon avalanche diode optimized for fast response (<1 ps typical) to transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the SMB package provides low inductance and compatibility with automated SMT placement.
It operates as a shunt-clamping device: during normal operation it presents high impedance (≤1 μA reverse leakage at 128 V), but conducts heavily when reverse voltage exceeds VBR, limiting downstream voltage to ≤207 V at 2.9 A (10/1000 μs). Derating applies above 25 °C ambient per Fig. 2, with TJmax = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 128 V - Maximum continuous reverse operating voltage before significant conduction begins; sets upper limit for normal circuit operation. |
| VBR (Breakdown) | 143–158 V at 1 mA - Confirmed avalanche onset range; defines minimum clamping threshold under standardized test conditions. |
| VC (Clamping) | 207 V at IPPM = 2.9 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case transient; must be below IC's absolute max rating. |
| PPPM | 600 W - Peak pulse power handling capacity; determines survivability against standardized surges like IEC 61000-4-5 (10/1000 μs). |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; governs steady-state power dissipation limits (PD = 5.0 W). |
| TJmax | +150 °C - Maximum allowable junction temperature; supports under-hood automotive use with appropriate board layout and airflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Molding compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges without failure. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream components - critical for 12 V/24 V automotive electronics with tight voltage margins. |
| MSL Level 1 (J-STD-020), 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualified option available | While SM6T150A-E3/5B is commercial-grade, HE3/HM3 variants are AEC-Q101 qualified - enabling direct upgrade path for automotive programs. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails feeding body control modules (BCM) and lighting drivers from load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Shunt-clamping TVS diode placed at input filter stage, directly across rail and ground. Use Value: Limits transient voltage to ≤207 V, well below 36 V absolute max rating of most automotive PMICs and microcontrollers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part protects DC-biased sensor lines referenced to ground. Use Value: Clamps induced spikes to <207 V with sub-nanosecond response, preserving ADC accuracy and preventing latch-up in signal conditioning ICs. |
| Telecom DC Power Input | Consumer Appliance Motor Drive |
|
Use Scenario: Guarding 48 V PoE-powered equipment inputs against lightning-induced surges (IEC 61000-4-5, 2 kV line-earth). IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converter input stage. Use Value: Withstands 600 W pulses and maintains <1 μA leakage at 128 V, ensuring minimal standby power loss and reliable surge shutdown. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Unidirectional TVS placed across motor terminals or H-bridge supply rail. Use Value: Fast avalanche response prevents gate oxide damage to MOSFETs; 150 °C TJmax accommodates enclosed thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Same VWM (128 V), identical SMB package, but lower PPPM = 400 W and higher VC = 243 V at 2.5 A. | Limited to less severe surge environments (e.g., IEC 61000-4-4 EFT only); insufficient for ISO 7637-2 Pulse 5a. | Select SMAJ150A only if system-level testing confirms 400 W margin is adequate and layout allows tighter thermal management. |
| SMCJ150A | Same electrical specs (VWM, VBR, VC, PPPM), but larger SMC (DO-214AB) package with RθJA = 40 °C/W and higher IFSM = 200 A. | Better thermal performance and surge endurance; suitable for high-reliability industrial power supplies. | Choose SMCJ150A when board space permits and long-term reliability under repeated surges is prioritized over footprint size. |
Compared with SMAJ150A and SMCJ150A, the SM6T150A-E3/5B delivers optimal balance of 600 W surge capability, compact SMB footprint, and commercial-grade cost structure - making it ideal for space-constrained automotive and industrial designs where full AEC-Q101 qualification is not mandated.
Availability
SM6T150A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom DC input applications requiring stable component supply, RoHS-compliant packaging, and consistent tape-and-reel delivery.
Supply support for SM6T150A-E3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against inductive switching and lightning surges is mission-critical.
FAQ
What is the maximum clamping voltage of the SM6T150A-E3/5B under standard test conditions?
The SM6T150A-E3/5B has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 2.9 A. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 88385, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during surge events. The SM6T150A-E3/5B maintains this clamping performance across its specified operating temperature range.
Is the SM6T150A-E3/5B AEC-Q101 qualified?
No, the SM6T150A-E3/5B is a commercial-grade part with RoHS compliance (E3 suffix) and does not carry AEC-Q101 qualification. However, Vishay offers AEC-Q101-qualified versions under ordering codes SM6T150AHE3_B/I and SM6T150AHM3_B/I (halogen-free). For automotive applications requiring qualification, those variants - not the SM6T150A-E3/5B - must be selected and validated per customer requirements.
What is the thermal resistance and power derating behavior of the SM6T150A-E3/5B?
The SM6T150A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. Its steady-state power dissipation (PD) is rated at 5.0 W at 50 °C ambient, with linear derating above that temperature per Figure 2 in the datasheet. At 125 °C ambient, usable PD drops to approximately 2.5 W. The SM6T150A-E3/5B must be thermally managed accordingly in enclosed or high-temperature environments.
How does the SM6T150A-E3/5B differ from bidirectional TVS diodes in the same series?
The SM6T150A-E3/5B is unidirectional and features a cathode band for polarity identification; it conducts only in reverse bias during transients. Bidirectional equivalents (e.g., SM6T150CA) omit the band and suppress surges in both directions, making them suitable for AC lines or floating differential signals. The SM6T150A-E3/5B is not interchangeable with bidirectional types without circuit redesign - especially in grounded DC systems where forward conduction must be avoided.
What is the reverse leakage current specification for the SM6T150A-E3/5B at its stand-off voltage?
The SM6T150A-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage (VWM) of 128 V, measured at 25 °C ambient. This low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing nodes. Leakage remains within specification up to +125 °C, with gradual increase governed by semiconductor physics - confirmed in Vishay's Electrical Characteristics table (Document 88385, page 2).
SM6T150A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 2.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T150A-E3/5B FAQ
1.How can I place an order for SM6T150A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150A-E3/5B 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 SM6T150A-E3/5B reliable?
The price and inventory of SM6T150A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T150A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T150A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150A-E3/5B?
SM6T150A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150A-E3/5B 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 SM6T150A-E3/5B?
For technical support, including SM6T150A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150A-E3/5B requirements.
6.How does Aetrix verify that SM6T150A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T150A-E3/5B 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 SM6T150A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T150A-E3/5B?
All SM6T150A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150A-E3/5B, 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 SM6T150A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T150A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150A-E3/5B 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 …
