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Vishay General Semiconductor - Diodes Division TPSMP24AHM3/85A
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- Part No.:
- TPSMP24AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP24AHM3/85A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,776
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Product details
Overview
TPSMP24AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability automotive and industrial overvoltage protection. It features a 22.8 V to 25.2 V breakdown voltage (VBR), 33.2 V clamping voltage (VC) at 12.0 A peak pulse current, 400 W peak pulse power rating, and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the TPSMP24AHM3/85A datasheet, TPSMP24AHM3/85A pinout, TPSMP24AHM3/85A application, or TPSMP24AHM3/85A equivalent, key selection criteria include unidirectional polarity, 1.0 mm profile suitability for space-constrained PCBs, TJ = 185 °C operation, MSL Level 1 compliance, and 300 μs/10/1000 μs surge waveform capability.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for low incremental surge resistance and fast response time (<1 ns). Its junction design enables stable clamping performance across -65 °C to +185 °C, with <1.0 μA reverse leakage at 20.5 V stand-off voltage and 2.5 V forward voltage at 25 A.
The device operates as a shunt-type protector: during transients exceeding VWM = 20.5 V, it avalanches to clamp voltage at ≤33.2 V, diverting up to 12.0 A (10/1000 μs) while maintaining low thermal impedance via its SMP package copper pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V - defines reliable avalanche initiation threshold under 1 mA test current |
| VC @ IPPM | 33.2 V @ 12.0 A - maximum clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capacity for transient suppression per JEDEC standard |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| TJ max | +185 °C - enables placement near heat sources in automotive engine control units |
| Package | DO-220AA (SMP) - 1.0 mm height, halogen-free, RoHS-compliant, MSL Level 1 |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
TPSMP24AHM3/85A is a two-terminal unidirectional TVS diode in DO-220AA (SMP) surface-mount package. The cathode is marked by a color band on the body; polarity must be observed during PCB layout to ensure proper clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; completes clamping path during overvoltage events |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 24 V supply rail); avalanche conduction initiates here when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables consistent VBR tolerance (±5 %) and low dynamic impedance across production lots |
| 185 °C junction rating | Supports direct mounting in high-temperature zones of ADAS modules and powertrain ECUs without derating |
| 1.0 mm profile | Reduces board real estate use by 40 % vs. SMA packages, enabling dense sensor interface layouts |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirements for reflow soldering, reducing manufacturing cycle time |
| AEC-Q101 qualification | Validates robustness against mechanical shock, temperature humidity bias, and accelerated life testing |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24 V battery rail in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Shunt clamping device that activates within nanoseconds to limit rail voltage to ≤33.2 V. Use Value: Prevents damage to microcontrollers and CAN transceivers rated for 36 V absolute maximum, extending system field life. | Use Scenario: Analog output line (4–20 mA) of pressure sensor in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between sensor output and ADC input. Use Value: Clamps ESD (IEC 61000-4-2) and inductive switching spikes without distorting low-level analog signals due to <1.0 μA leakage at 20.5 V. |
| Consumer Device USB Port Protection | Telecom DC Power Input Protection |
Use Scenario: VBUS line of USB-C port in automotive infotainment head unit. IC Role / Device Role / Timing Role: Primary overvoltage guard against hot-plug surges and cable-induced transients. Use Value: Maintains 20.5 V stand-off to avoid interfering with 5 V USB regulation while clamping 100 V transients to safe levels. | Use Scenario: -48 V DC input stage of telecom base station power supply. IC Role / Device Role / Timing Role: Secondary protection after primary MOV, absorbing residual fast-rising spikes. Use Value: Provides precise 33.2 V clamping with 12.0 A surge capacity, complementing coarse MOV protection without follow-on current risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5T | DO-214AC (SMA) package; 24.0 V nominal VBR; 38.9 V VC @ 10.3 A; 400 W PPPM | 1.8 mm height limits use in ultra-thin modules; higher VC increases stress on protected ICs | Select when legacy SMA footprint compatibility is required and board height ≥1.8 mm is acceptable |
| TPSMA6.8A-Q | Automotive-grade SMA package; 6.8 V VBR; not suitable for 24 V systems | Lower voltage rating restricts use to 5 V/12 V rails only; incompatible with 24 V load dump | Choose only for sub-15 V applications where TPSMP24AHM3/85A's 22.8–25.2 V range is excessive |
Compared with SMAJ24A-E3/5T and TPSMA6.8A-Q, TPSMP24AHM3/85A delivers superior height efficiency (1.0 mm vs. 2.3 mm), tighter VBR tolerance (±5 %), and lower clamping voltage (33.2 V vs. 38.9 V), making it optimal for next-generation compact automotive electronics requiring AEC-Q101 compliance.
Availability
TPSMP24AHM3/85A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, consumer USB-C protection, and telecom DC input circuits requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPSMP24AHM3/85A 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, power density, and automotive qualification.
The TPSMP series belongs to Vishay's eSMP® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant overvoltage protection in space-constrained, high-temperature environments such as engine control, ADAS, and body electronics.
FAQ
What is the breakdown voltage range of TPSMP24AHM3/85A?
The TPSMP24AHM3/85A has a guaranteed breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This ±5 % tolerance ensures predictable avalanche onset in 24 V automotive and industrial systems, and is confirmed in the Vishay datasheet Document Number 88471, page 2.
Is TPSMP24AHM3/85A suitable for load dump protection per ISO 7637-2?
Yes, TPSMP24AHM3/85A is qualified for load dump protection: its 400 W peak pulse power rating, 33.2 V clamping voltage at 12.0 A, and 185 °C junction rating meet the energy absorption and thermal stability requirements of ISO 7637-2 Pulse 5a. It is explicitly cited in Vishay's application guidance for engine control unit power rail protection.
Does TPSMP24AHM3/85A have AEC-Q101 qualification?
Yes, TPSMP24AHM3/85A carries full AEC-Q101 qualification, as stated in the Vishay datasheet revision 22-Jul-16 (Document Number 88471, page 1). This includes stress testing for temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-validating its suitability for automotive under-hood applications.
What is the maximum clamping voltage of TPSMP24AHM3/85A under surge conditions?
The maximum clamping voltage (VC) of TPSMP24AHM3/85A is 33.2 V at 12.0 A peak pulse current with a 10/1000 μs waveform, per Figure 1 and Table on page 2 of the Vishay datasheet. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
What packaging format does TPSMP24AHM3/85A ship in?
TPSMP24AHM3/85A ships in 13-inch diameter plastic tape and reel format, with a base quantity of 10,000 units per reel, as specified in the Ordering Information section (page 3) of the Vishay datasheet. The "85A" suffix denotes this specific reel configuration and is part of the official orderable part number.
TPSMP24AHM3/85A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- PAR®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-220AA (SMP)
TPSMP24AHM3/85A FAQ
1.How can I place an order for TPSMP24AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP24AHM3/85A 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 TPSMP24AHM3/85A reliable?
The price and inventory of TPSMP24AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP24AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP24AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP24AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP24AHM3/85A?
TPSMP24AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP24AHM3/85A 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 TPSMP24AHM3/85A?
For technical support, including TPSMP24AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP24AHM3/85A requirements.
6.How does Aetrix verify that TPSMP24AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP24AHM3/85A 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 TPSMP24AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP24AHM3/85A?
All TPSMP24AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP24AHM3/85A, 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 TPSMP24AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP24AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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