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Vishay General Semiconductor - Diodes Division TPSMA24AHM3_B/I
- Part No.:
- TPSMA24AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA24AHM3_B/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,438
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Product details
Overview
TPSMA24AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 24 V breakdown voltage (VBR = 22.8–25.2 V at 1 mA), 400 W peak pulse power (10/1000 µs), 33.2 V clamping voltage at 12 A, and 185 °C maximum junction temperature - deployed for robust overvoltage protection of MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the TPSMA24AHM3_B/I datasheet, TPSMA24AHM3_B/I pinout, TPSMA24AHM3_B/I application, or TPSMA24AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, 1.0 W steady-state power dissipation, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range. Its 0.085 %/°C temperature coefficient of VBR enables predictable voltage threshold drift under thermal stress, critical for automotive engine control units and industrial motor drives.
The device operates exclusively in unidirectional mode with cathode band marking, exhibits <1 ns response time to transients, and maintains low incremental surge resistance to minimize voltage overshoot during 40 A IFSM (8.3 ms half-sine) events - validated per ANSI/IEEE C62.35 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 22.8 V / 24.0 V / 25.2 V at 1 mA - defines precise reverse conduction onset for reliable circuit-level overvoltage triggering |
| VWM | 20.5 V - maximum continuous reverse working voltage before leakage exceeds 1 μA, ensuring no false triggering in nominal operation |
| VC @ IPPM | 33.2 V at 12.0 A - clamped voltage during 400 W transient, limiting downstream component stress to safe levels |
| PPPM | 400 W (10/1000 µs waveform) - energy-handling capacity sufficient for lightning-induced surges and inductive switching spikes |
| TJ max. | +185 °C - enables use in under-hood automotive environments and high-power industrial enclosures without derating |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct orientation relative to protected line polarity |
| MSL Level | Level 1 (J-STD-020) - supports standard SMT reflow without baking, reducing manufacturing complexity |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected circuit; carries full surge current during clamping |
| Cathode | Current exit point during forward conduction; marked with band | Connected to higher-potential side (e.g., VCC rail or signal line); determines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces long-term parameter drift and leakage growth under thermal cycling and humidity exposure |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing per JEDEC standards |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive CMOS inputs |
| Excellent clamping capability | Clamps within 33.2 V at 12 A, delivering >30% lower clamping voltage than generic 24 V TVS diodes in same package |
| Very fast response time | Sub-nanosecond turn-on ensures suppression before transient energy couples into protected ICs or MOSFET gates |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver pins from load-dump and alternator ripple transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground, clamping positive surges above 20.5 V while remaining high-impedance below that threshold. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/5a test requirements and extends ECU field life beyond 15 years in harsh thermal environments. | Use Scenario: Shields encoder feedback lines and gate driver inputs from commutation-induced voltage spikes in 3-phase inverters. IC Role / Device Role / Timing Role: Standoff protection element on differential analog inputs, absorbing repetitive 400 W pulses without degradation over 100,000+ cycles. Use Value: Prevents false position reporting and gate driver latch-up, maintaining SIL-2 functional safety integrity in servo motion control systems. |
| Telecom Power Supply Input | Consumer Sensor Hub Protection |
Use Scenario: Safeguards primary-side controller ICs and optocoupler inputs against AC line surges and lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary-side transient clamp on DC bus input, coordinated with MOV and fuse for staged overvoltage defense. Use Value: Reduces required MOV energy rating by 40%, lowering thermal stress and enabling compact 25 mm² board area allocation. | Use Scenario: Guards I²C and UART lines connecting environmental sensors (temperature, humidity, gas) to host MCU in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) unidirectional clamp on bidirectional data lines, preserving signal integrity up to 400 kHz. Use Value: Eliminates ESD-induced sensor reset events per IEC 61000-4-2 Level 4 (8 kV contact), achieving >99.99% uptime in field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3_A/H | Same VBR range (22.8–25.2 V), but 400 W rating uses 10/1000 µs waveform; not AEC-Q101 qualified; MSL Level 1 confirmed | Lacks automotive qualification; suitable for commercial/industrial use only; identical footprint and soldering profile | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability |
| TPSMA24AHM3_B/H | Identical electrical specs and AEC-Q101 qualification; differs only in packaging - 7" tape/reel (1800 pcs) vs. 13" tape/reel (7500 pcs) | No functional or application difference; used interchangeably where volume and reel size align with SMT line constraints | Select when smaller reels match production batch sizing or feeder compatibility requirements |
Compared with SMAJ24AHE3_A/H and TPSMA24AHM3_B/H, the TPSMA24AHM3_B/I offers identical protection performance and automotive qualification, with the sole distinction being its 13" tape-and-reel delivery format - enabling longer uninterrupted SMT runs and reduced changeover frequency in high-volume manufacturing.
Availability
TPSMA24AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive interfaces, telecom power supply inputs, and consumer sensor hub protection requiring stable component supply and AEC-Q101 traceability.
Supply support for TPSMA24AHM3_B/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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive-grade validation.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature stability and repeatable clamping in mission-critical automotive and industrial power electronics.
FAQ
What is the exact breakdown voltage range for TPSMA24AHM3_B/I at 1 mA test current?
The TPSMA24AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1 mA test current, with a typical value of 24.0 V. This specification is measured per ANSI/IEEE C62.35 and verified during 100% production testing. The narrow tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in automotive and industrial circuits.
Is TPSMA24AHM3_B/I qualified to AEC-Q101, and what does the HM3 suffix indicate?
Yes, TPSMA24AHM3_B/I is fully AEC-Q101 qualified. The HM3 suffix denotes halogen-free, RoHS-compliant construction with whisker-resistant matte tin plating and JESD 201 Class 2 whisker test compliance. It confirms qualification across high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (uHAST), making it suitable for under-hood automotive applications per ISO/TS 16949 requirements.
What is the maximum clamping voltage of TPSMA24AHM3_B/I and at what current is it specified?
The maximum clamping voltage (VC) of TPSMA24AHM3_B/I is 33.2 V, specified at 12.0 A peak pulse current (IPPM) using the standard 10/1000 µs double-exponential waveform. This value represents worst-case clamping under full-rated 400 W transient conditions and is used to verify safe voltage margins for downstream components such as 3.3 V or 5 V logic interfaces and gate drivers.
Can TPSMA24AHM3_B/I be used in bidirectional protection configurations?
No, TPSMA24AHM3_B/I is strictly unidirectional and must be used with correct polarity - cathode toward the higher-potential node. For bidirectional protection, two TPSMA24AHM3_B/I devices may be connected in series opposing configuration, but this is not recommended due to increased capacitance and layout complexity. Vishay offers dedicated bidirectional variants (e.g., TPSMA24CA) for such applications.
What is the thermal derating behavior of TPSMA24AHM3_B/I above 25 °C ambient temperature?
TPSMA24AHM3_B/I follows linear derating per Figure 2 in Vishay document 88405: peak pulse power (PPPM) decreases from 400 W at 25 °C to zero at 185 °C junction temperature. At 125 °C ambient (assuming θJA ≈ 120 °C/W), PPPM is reduced to approximately 220 W. Derating is calculated using the formula provided in the datasheet and must be applied in thermally constrained PCB layouts.
TPSMA24AHM3_B/I 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA24AHM3_B/I FAQ
1.How can I place an order for TPSMA24AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA24AHM3_B/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 TPSMA24AHM3_B/I reliable?
The price and inventory of TPSMA24AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA24AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA24AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA24AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA24AHM3_B/I?
TPSMA24AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA24AHM3_B/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 TPSMA24AHM3_B/I?
For technical support, including TPSMA24AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA24AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA24AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA24AHM3_B/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 TPSMA24AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA24AHM3_B/I?
All TPSMA24AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA24AHM3_B/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 TPSMA24AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA24AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA24AHM3_B/I Tags
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