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Vishay T15B12AHM3/H
- Part No.:
- T15B12AHM3/H
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
T15B12AHM3/H.pdf
- Description:
- 1.5KW,12V 5%,SMB PAR
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
T15B12AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching transients and lightning-induced surges in automotive sensor signal lines and MOSFET gate protection circuits. It delivers 1500 W peak pulse power (10/1000 μs), features a 12 V nominal breakdown voltage (VBR = 11.4–12.6 V at IT = 1 mA), operates up to TJ = 185 °C, and is AEC-Q101 qualified for under-hood automotive use.
For engineers reviewing the T15B12AHM3/H datasheet, T15B12AHM3/H pinout, T15B12AHM3/H application, or T15B12AHM3/H equivalent, this page provides verified electrical specs, SMB (DO-214AA) package details, clamping performance at 91.2 A IPPM, thermal derating curves, and direct alternatives for high-reliability transient suppression in automotive ECUs and industrial control modules.
Technical Context
The T15B12AHM3/H uses passivated anisotropic rectifier technology to achieve stable breakdown voltage with ±5% tolerance and low temperature coefficient (αT = 0.070 %/°C). Its unidirectional architecture enables precise reverse-biased clamping without forward conduction during normal operation.
It sustains 17.0 V maximum clamping voltage (VC) at 91.2 A peak pulse current (IPPM) under 10/1000 μs waveform, with <1 ps response time and junction capacitance of ~1000 pF at zero bias - optimized for protecting low-speed analog and digital signal paths against ESD and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at IT = 1 mA - ensures reliable turn-on before downstream IC damage threshold |
| VWM | 10.2 V - maximum continuous reverse working voltage without leakage degradation |
| VC @ IPPM | 17.0 V at 91.2 A - clamps surge energy within safe margin for 12 V rail systems |
| PPPM | 1500 W (10/1000 μs) - handles automotive load-dump and ISO 7637-2 pulse 5a/b energy |
| TJ max | +185 °C - supports placement near power stages or in engine compartment environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| ESD immunity | ±30 kV contact/air per IEC 61000-4-2 - protects against human-body-model discharge events |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VIN exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stabilizes VBR drift over lifetime and temperature, critical for long-term automotive field reliability |
| 185 °C junction rating | Enables placement in high-ambient zones (e.g., near power converters or motor drivers) without derating |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V vehicle systems |
| Unidirectional configuration | Prevents forward conduction during normal operation, eliminating DC loading on protected signal lines |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns or baking preconditioning |
Applications
| Automotive Sensor Protection | MOSFET Gate Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver input pins and analog sensor outputs (e.g., pressure, temperature) from ESD and inductive kickback in body control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector or IC input pin. Use Value: Limits clamped voltage to ≤17.0 V, preventing latch-up or oxide breakdown in 3.3 V/5 V interface ICs while surviving ≥30 kV ESD events. |
Use Scenario: Shielding N-channel MOSFET gate-source terminals from voltage spikes caused by fast-switching inductive loads (e.g., solenoids, relays). IC Role / Device Role / Timing Role: Unidirectional TVS connected between gate and source to clamp negative transients only. Use Value: Prevents gate oxide rupture with sub-nanosecond response and maintains VGS integrity below absolute maximum rating (±20 V typical). |
| Engine Control Unit (ECU) Power Input | Industrial PLC Digital I/O Protection |
|
Use Scenario: Safeguarding 12 V supply inputs of engine management ECUs against ISO 7637-2 Pulse 5a (load dump) transients up to 60 V. IC Role / Device Role / Timing Role: Primary clamping device upstream of input filter and LDO regulator. Use Value: Absorbs 1500 W peak energy without failure, limiting input rail overshoot to ≤17.0 V for downstream 24 V tolerant regulators. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers exposed to field wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each channel input, referenced to common ground. Use Value: Maintains VWM = 10.2 V compatibility with 12 V logic thresholds while clamping >90 A surges to safe levels for optocoupler inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same SMB package, 12 V VBR, but lower PPPM = 600 W and TJ max = 150 °C | Limited to non-automotive or lower-energy surge environments (e.g., consumer IoT) | Select when cost sensitivity outweighs AEC-Q101 and 185 °C requirements |
| SMCJ12A | Higher PPPM = 1500 W, same VBR, but larger SMC (DO-214AB) package (7.11 × 6.22 mm vs. 4.57 × 3.94 mm) | Requires PCB area increase; better suited for higher-current industrial power rails | Choose when board space allows and higher IPPM margin (>100 A) is needed |
Compared with SMBJ12A and SMCJ12A, the T15B12AHM3/H uniquely combines AEC-Q101 qualification, 185 °C operation, and SMB footprint - enabling drop-in replacement in space-constrained automotive modules where reliability and thermal headroom are non-negotiable.
Availability
T15B12AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, MOSFET gate safeguarding, and ECU power input conditioning requiring stable component supply across production lifecycles.
Supply support for T15B12AHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The T15B12AHM3/H belongs to Vishay's PAR® family of transient voltage suppressors engineered specifically for robust surge immunity in harsh automotive and industrial environments - prioritizing thermal stability, ESD hardness, and AEC-Q101 compliance.
FAQ
What is the maximum clamping voltage of the T15B12AHM3/H at its rated peak pulse current?
The T15B12AHM3/H exhibits a maximum clamping voltage (VC) of 17.0 V when subjected to its rated peak pulse current of 91.2 A under the standard 10/1000 μs waveform. This value is measured per Figure 3 in the Vishay datasheet 98360 and defines the upper voltage limit imposed on protected circuitry during surge events - ensuring compatibility with 12 V system components and downstream ICs rated for ≤20 V absolute maximum.
Is the T15B12AHM3/H suitable for automotive under-hood applications?
Yes, the T15B12AHM3/H is explicitly AEC-Q101 qualified and rated for TJ = –65 °C to +185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and body electronics. Its passivated anisotropic rectifier structure and MSL Level 1 reflow capability further ensure reliability in thermally aggressive, vibration-prone environments where the T15B12AHM3/H must maintain stable VBR and low leakage over 15+ years.
What does the "HM3/H" suffix indicate in T15B12AHM3/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards, plus JESD 201 Class 2 whisker resistance. The trailing "/H" specifies packaging: 750-unit quantity on 7-inch plastic tape and reel. This full designation confirms that the T15B12AHM3/H meets automotive material and assembly requirements while enabling automated SMT placement.
How does the T15B12AHM3/H compare to bidirectional TVS diodes in signal-line protection?
The T15B12AHM3/H is unidirectional, meaning it clamps only reverse-polarity transients and blocks forward current - ideal for DC-biased signal lines like sensor outputs or MOSFET gates where forward conduction would disrupt normal operation. Bidirectional variants (e.g., T15B12AYM3/H) conduct in both directions and are used for AC-coupled or floating lines. For 12 V rail or grounded-signal protection, the unidirectional T15B12AHM3/H offers tighter VC and avoids unintended forward biasing.
Does the T15B12AHM3/H require external series impedance for optimal protection?
No, the T15B12AHM3/H functions as a shunt protector and does not require external series impedance to operate - it clamps directly across the protected node and ground. However, in high-frequency ESD scenarios or when protecting fast digital signals, a small series resistor (e.g., 10–100 Ω) may be added to limit di/dt and reduce ringing; this is a system-level design choice, not a requirement of the T15B12AHM3/H itself, which remains fully functional with direct placement.
T15B12AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- DO-214AA, SMB
- 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:
- 17V
- Current - Peak Pulse (10/1000µs):
- 91.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AA (SMB)
T15B12AHM3/H FAQ
1.How can I place an order for T15B12AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for T15B12AHM3/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 T15B12AHM3/H reliable?
The price and inventory of T15B12AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T15B12AHM3/H is usually 5 days.
3.What payment methods are accepted for T15B12AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T15B12AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T15B12AHM3/H?
T15B12AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T15B12AHM3/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 T15B12AHM3/H?
For technical support, including T15B12AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T15B12AHM3/H requirements.
6.How does Aetrix verify that T15B12AHM3/H is sourced from the original manufacturer or authorized distributors?
All T15B12AHM3/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 T15B12AHM3/H meets industry standards.
7.What is the process for return or replacement of T15B12AHM3/H?
All T15B12AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with T15B12AHM3/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 T15B12AHM3/H part is unused and in its original packaging.
Return procedure for T15B12AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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