My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA12AHE3_B/H
- Part No.:
- TPSMA12AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHE3_B/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,230
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA12AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 12.0 V nominal breakdown voltage (VBR), 24.0 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the TPSMA12AHE3_B/H datasheet, TPSMA12AHE3_B/H pinout, TPSMA12AHE3_B/H application, or TPSMA12AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C capability, low clamping ratio (VC/VBR ≈ 2.0), and compatibility with automated SMT assembly under J-STD-020 MSL Level 1.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to transient overvoltages. Its unidirectional configuration provides forward conduction only during reverse-biased surge events, enabling precise clamping without interfering with normal DC bias paths.
The device meets AEC-Q101 qualification requirements and is rated for repetitive 10/1000 µs waveform surges at 0.01 % duty cycle. Its thermal design supports operation up to +185 °C junction temperature, making it suitable for under-hood automotive environments and high-reliability industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - defines reliable avalanche initiation threshold across temperature and unit variation |
| VWM | 10.20 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 24.0 V at 5.0 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling per single transient event under standard test conditions |
| TJ max. | +185 °C - enables use in high-ambient-temperature locations such as engine control units |
| Polarity | Unidirectional - protects against negative-going transients only; requires correct cathode orientation |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline compatible with automated placement and reflow |
Pinout & Package
SMA (DO-214AC) package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path during surge | Connected to protected line's lower-potential side (e.g., ground or return); conducts when Vcathode – Vanode ≥ VBR |
| Cathode | Clamping reference node | Connected to protected line's higher-potential side (e.g., supply rail or signal); defines clamping level relative to this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR drift < ±5 % over lifetime at TJ = 150 °C |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing per stress test plan |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak, no dry-pack or baking required |
| Low incremental surge resistance | Enables tight VC control during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| High-temperature operation | Full electrical performance guaranteed from -65 °C to +185 °C junction temperature |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in engine compartments. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between signal line and ground, activated within < 1 ns of overvoltage onset. Use Value: Limits transient voltage to ≤24.0 V, preventing damage to 12 V-rated transceivers and preserving signal integrity during ISO 16750-2 pulses. | Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input lines, absorbing repetitive 400 W surges without degradation. Use Value: Maintains VWM = 10.20 V margin above 24 V system noise floor while delivering 5.0 A clamping current per IEC 61000-4-5 Level 3. |
| Consumer Power Adapter Output | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage protection on 12 V DC output rails of wall-mounted AC/DC adapters subject to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage clamp after primary regulation, shunting energy to ground during fast-rising transients. Use Value: Achieves 24.0 V clamping at 5.0 A with < 1.0 µA leakage at 10.20 V, minimizing standby power loss. | Use Scenario: Protecting Ethernet PHY interfaces and PoE injectors from induced surges on twisted-pair data lines in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional-capable protection network component (used in unidirectional pair configuration with series impedance). Use Value: Delivers consistent 12.0 V VBR tolerance and 0.070 %/°C tempco for stable clamping across -40 °C to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same VBR range (11.4–12.6 V) but SMB (DO-214AA) package; 600 W PPPM; higher VC = 19.9 V @ 6.4 A | Higher peak power but larger footprint; less suitable for space-constrained automotive modules | Select when higher surge margin is needed and PCB area allows SMB outline |
| 1.5SMC12A | Same VBR and polarity; SMC (DO-214AB) package; 1500 W PPPM; VC = 19.2 V @ 78.1 A | Designed for higher-energy transients (e.g., IEC 61000-4-5 Level 4); not AEC-Q101 qualified | Prefer for industrial mains-connected equipment where automotive qualification is unnecessary |
Compared with SMBJ12A and 1.5SMC12A, the TPSMA12AHE3_B/H offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and precise 24.0 V clamping - critical for automotive sensor nodes and space-limited industrial edge devices requiring long-term reliability at +185 °C.
Availability
TPSMA12AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and consumer power supply designs requiring stable component supply, AEC-Q101 qualification, and high-temperature operational assurance.
Supply support for TPSMA12AHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The TPSMA series belongs to Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for robust, high-temperature surge protection in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of the TPSMA12AHE3_B/H and how is it measured?
The TPSMA12AHE3_B/H has a maximum clamping voltage (VC) of 24.0 V at 5.0 A peak pulse current using a 10/1000 µs waveform. This value is measured per JEDEC standards with the device mounted on a PCB having 0.2" × 0.2" copper pads per terminal. The clamping voltage directly limits the maximum voltage seen by downstream circuitry during surge events, ensuring protection of 12 V-rated ICs and interfaces.
Is the TPSMA12AHE3_B/H AEC-Q101 qualified and what does that mean for automotive use?
Yes, the TPSMA12AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 23-Jan-2024. This qualification validates its reliability under automotive stress conditions including high-temperature operating life, temperature cycling, and humidity testing. It enables direct use in engine control units, body electronics, and ADAS sensors without additional qualification effort.
What is the difference between TPSMA12AHE3_B/H and TPSMA12AHM3_B/H?
The TPSMA12AHE3_B/H is RoHS-compliant and AEC-Q101 qualified, while TPSMA12AHM3_B/H adds halogen-free construction in addition to RoHS compliance and AEC-Q101 qualification. Both share identical electrical characteristics, thermal ratings, and packaging. The HM3 variant is selected when halogen-free material content is mandated by end-equipment environmental policies or regional regulations.
Can the TPSMA12AHE3_B/H be used in bidirectional protection circuits?
No, the TPSMA12AHE3_B/H is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts only when the cathode is positive relative to the anode beyond VBR. For bidirectional protection, two TPSMA12AHE3_B/H devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMAJ12A should be selected instead.
What is the thermal derating behavior of the TPSMA12AHE3_B/H above 25 °C ambient?
The TPSMA12AHE3_B/H follows standard thermal derating per Figure 2 in the datasheet: peak pulse power (PPPM) decreases linearly above TA = 25 °C, reaching ~50 % of 400 W at ~125 °C case temperature. Its +185 °C maximum junction temperature allows sustained operation in high-ambient environments when board-level thermal design maintains adequate heat spreading via copper pads and traces.
TPSMA12AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- 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):
- 24A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA12AHE3_B/H FAQ
1.How can I place an order for TPSMA12AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHE3_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 TPSMA12AHE3_B/H reliable?
The price and inventory of TPSMA12AHE3_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 TPSMA12AHE3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA12AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHE3_B/H?
TPSMA12AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHE3_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 TPSMA12AHE3_B/H?
For technical support, including TPSMA12AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA12AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHE3_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 TPSMA12AHE3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA12AHE3_B/H?
All TPSMA12AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHE3_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 TPSMA12AHE3_B/H part is unused and in its original packaging.
Return procedure for TPSMA12AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA12AHE3_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 …
