My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T12AHE3_B/H
- Part No.:
- SM6T12AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12AHE3_B/H.pdf
- Description:
- 600W,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,855
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T12AHE3_B/H 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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1.0 mA), 16.7 V maximum clamping voltage (VC) at 36.0 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T12AHE3_B/H datasheet, SM6T12AHE3_B/H pinout, SM6T12AHE3_B/H application, or SM6T12AHE3_B/H equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage, low clamping ratio (VC/VBR ≈ 1.4), RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity rating.
Technical Context
The SM6T12AHE3_B/H operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response to ESD and surge events. Its clamping behavior is defined by a 10/1000 μs waveform, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C.
Designed for surface-mount automated placement, it meets JESD 201 Class 2 whisker test requirements and supports soldering per J-STD-002 and JESD 22-B102. The cathode band denotes polarity, and its SMB package conforms to DO-214AA mechanical outline with 0.220" × 0.205" footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1.0 mA - defines precise avalanche onset for predictable clamping threshold |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5.0 μA |
| VC @ IPPM | 16.7 V at 36.0 A - limits downstream voltage during 600 W transient, protecting 12 V rail ICs |
| PPPM | 600 W (10/1000 μs) - handles automotive load dump and inductive switching surges |
| TJ max. | +150 °C - enables under-hood deployment in automotive ECUs and power modules |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply or signal trace); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation in automotive power nets |
| Glass passivated chip junction | Ensures stable VBR over time and temperature, minimizing parameter drift in harsh environments |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without pre-baking or special handling |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive-grade reliability: HTOL, TC, UHAST, and bond wire strength testing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules (e.g., body control units) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 16.7 V. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers by limiting transient voltage to safe levels per ISO 16750-2. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure or temperature sensors) in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted across differential or single-ended signal traces to suppress ESD and cable discharge events. Use Value: Maintains signal integrity with <1 nF junction capacitance and sub-100 ps response, avoiding distortion of slow-varying sensor signals. |
| Consumer Power Adapter Input Stage | Telecom DC Power Interface |
Use Scenario: Input-side protection in wall adapters and USB-C PD power supplies exposed to AC line surges. IC Role / Device Role / Timing Role: First-line clamping device on primary-side DC bus after rectification. Use Value: Absorbs 600 W pulses without failure, meeting IEC 61000-4-5 Level 3 immunity requirements. | Use Scenario: Protection of -48 V telecom power distribution boards against lightning-induced surges on backplane feeds. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V rail and return, leveraging 10.2 V stand-off for system margin. Use Value: Enables robust field deployment with 150 °C junction rating and halogen-free option (HM3 variant available). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but 400 W PPPM; no AEC-Q101 qualification in standard grade | Limited to commercial/industrial use; not certified for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification requirement |
| 1.5SMC12A | Higher 1.5 kW PPPM, larger SMC (DO-214AB) package; VC = 19.9 V at 75.5 A | Requires PCB area increase (~30% larger footprint); suited for higher-energy surge environments | Choose when system-level surge tests exceed 600 W, e.g., industrial motor drives |
Compared with SMAJ12A and 1.5SMC12A, the SM6T12AHE3_B/H delivers optimal balance of automotive qualification, compact SMB footprint, and 600 W capability-making it preferred for space-constrained, high-reliability 12 V rail protection where AEC-Q101 compliance is mandatory.
Availability
SM6T12AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power distribution systems requiring stable component supply and long-term lifecycle support.
Supply support for SM6T12AHE3_B/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 SM6T Series is engineered for robust transient suppression in automotive, industrial, and consumer power systems-designed to meet stringent AEC-Q101, IEC 61000-4-2/4-5, and ISO 16750 standards with consistent clamping and low inductance.
FAQ
What is the breakdown voltage tolerance for SM6T12AHE3_B/H?
The SM6T12AHE3_B/H has a specified breakdown voltage range of 11.4 V to 12.6 V at 1.0 mA test current, representing ±5% tolerance around the nominal 12 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise circuit margining in 12 V systems.
Is SM6T12AHE3_B/H suitable for bidirectional transient protection?
No, SM6T12AHE3_B/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SM6T12CA variant with "CA" suffix. Using SM6T12AHE3_B/H in bidirectional applications would result in forward conduction during negative transients, potentially causing failure.
What does the "HE3_B/H" suffix mean in SM6T12AHE3_B/H?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "B" indicates revision level; "H" specifies 7" tape-and-reel packaging with 750 units per reel. This full suffix confirms automotive-grade reliability, environmental compliance, and standardized SMT handling-critical for Tier 1 automotive supply chain traceability.
How does SM6T12AHE3_B/H perform under elevated ambient temperatures?
SM6T12AHE3_B/H derates linearly above 25 °C ambient: peak pulse power drops per Figure 2 in the datasheet, maintaining 50% of rated 600 W at ~100 °C board temperature. Its 150 °C max junction temperature and 100 °C/W RθJA allow operation in under-hood environments when mounted on recommended 0.2" × 0.2" copper pads.
Can SM6T12AHE3_B/H replace older SM6T12A-E3 parts in existing designs?
Yes, SM6T12AHE3_B/H is a direct replacement for SM6T12A-E3 with identical electrical specs and SMB package dimensions. The "HE3" adds AEC-Q101 qualification and updated material compliance (per doc# 99912), while retaining the same 10.2 V VWM, 16.7 V VC, and 36.0 A IPPM-enabling drop-in upgrade for automotive programs without layout changes.
SM6T12AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM6T12AHE3_B/H FAQ
1.How can I place an order for SM6T12AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12AHE3_B/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 SM6T12AHE3_B/H reliable?
The price and inventory of SM6T12AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T12AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12AHE3_B/H?
SM6T12AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12AHE3_B/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 SM6T12AHE3_B/H?
For technical support, including SM6T12AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12AHE3_B/H requirements.
6.How does Aetrix verify that SM6T12AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T12AHE3_B/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 SM6T12AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T12AHE3_B/H?
All SM6T12AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12AHE3_B/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 SM6T12AHE3_B/H part is unused and in its original packaging.
Return procedure for SM6T12AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12AHE3_B/H 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 …
