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Vishay General Semiconductor - Diodes Division TPSMP24HM3/85A
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- Part No.:
- TPSMP24HM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP24HM3/85A.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,450
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Product details
Overview
TPSMP24HM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability automotive and industrial circuit protection. It features a 21.6 V to 26.4 V breakdown voltage (VBR), 34.7 V clamping voltage (VC) at 11.5 A peak pulse current, 400 W peak pulse power rating, and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the TPSMP24HM3/85A datasheet, TPSMP24HM3/85A pinout, TPSMP24HM3/85A application, or TPSMP24HM3/85A equivalent, key selection criteria include unidirectional polarity, 1.0 mm profile height, 185 °C junction temperature capability, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on FR-4 PCBs.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and lightning-induced transients per IEC 61000-4-2/4-5. Its unidirectional configuration provides forward conduction path during overvoltage events while maintaining low leakage (<1 μA at 19.4 V) at stand-off voltage.
The device operates across -65 °C to +185 °C junction temperature range and is rated for 40 A non-repetitive forward surge current (IFSM). Thermal derating follows a defined curve up to 75 °C ambient, with 2.5 W steady-state power dissipation on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 21.6 V / 26.4 V - ensures reliable triggering above normal operating voltage while accommodating manufacturing tolerance |
| VC @ IPPM | 34.7 V at 11.5 A - clamps induced surges to safe levels for downstream 24 V logic and power ICs |
| PPPM | 400 W (10/1000 μs waveform) - handles automotive load-dump and ISO 7637-2 pulse 5a energy |
| VWM | 19.4 V - provides 20 % margin above nominal 24 V rail, minimizing leakage during normal operation |
| TJ max | +185 °C - supports under-hood placement without thermal derating penalties in engine control units |
| Package | DO-220AA (SMP) - 1.0 mm typical height enables compact layout in space-constrained modules |
| AEC-Q101 | Qualified - meets stress test requirements for automotive-grade reliability and lifetime validation |
Pinout & Package
TPSMP24HM3/85A uses the DO-220AA (SMP) surface-mount package with two terminals: anode and cathode. The cathode is marked by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal or power line; conducts during reverse-biased transient clamp |
| Cathode | Output/load side terminal | Connected to ground or return path; color band identifies polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR performance and low leakage over temperature and lifetime |
| 185 °C junction rating | Supports direct mounting near heat sources in automotive ECUs without external thermal management |
| 1.0 mm typical height | Reduces board stack height in multi-layer modules such as ADAS camera housings and motor drivers |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirement before reflow, streamlining high-volume SMT assembly |
| Uni-directional configuration | Provides DC blocking and surge clamping in polarized circuits like 24 V supply rails and CAN bus lines |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and sensor interface lines from load dump and alternator ripple in 24 V vehicle systems. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between 24 V supply rail and ground, clamping spikes within nanoseconds. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V logic ICs during ISO 7637-2 Pulse 5a events up to 400 W. | Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS connected in parallel with optocoupler input, absorbing inductive kickback from solenoid feedback. Use Value: Maintains signal integrity and extends optocoupler lifetime by limiting reverse voltage to ≤34.7 V during 11.5 A transients. |
| Automotive Body Control Module (BCM) | Medical Infusion Pump Power Supply |
Use Scenario: Safeguarding LIN bus transceivers and window motor drivers against ESD and battery reversal transients. IC Role / Device Role / Timing Role: TVS diode mounted at connector entry point, shunting fast transients before reaching ASIC-level protection. Use Value: Achieves >30 kV contact ESD immunity per IEC 61000-4-2 while preserving 19.4 V stand-off for normal LIN communication. | Use Scenario: Protecting isolated DC-DC converter inputs from mains-coupled surges in Class II medical equipment. IC Role / Device Role / Timing Role: Primary-side TVS on 24 V auxiliary rail, coordinated with Y-capacitor and common-mode choke filtering. Use Value: Limits surge energy to <10 mJ during 1.2/50 μs transients, preventing transformer insulation breakdown and ensuring 2×MOPP compliance. |
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-E3/61 | DO-214AC (SMA) package; 24 V nominal VBR; 400 W PPPM; 38.9 V VC at 10.3 A | Higher clamping voltage and 2.2 mm height limit space-constrained automotive modules | Preferred where legacy SMA footprint exists and height >1.0 mm is acceptable |
| TPSMA6.8A-Q | Automotive-grade SMA package; lower VBR (6.45–7.14 V); 600 W PPPM; 11.3 V VC | Designed for 5 V/12 V systems; not suitable for 24 V rail protection due to insufficient VWM margin | Select only for sub-15 V applications requiring higher surge robustness |
Compared with SMAJ24A-E3/61 and TPSMA6.8A-Q, the TPSMP24HM3/85A delivers superior height efficiency (1.0 mm vs. 2.2 mm), tighter VBR tolerance (±10 % vs. ±5 %), and optimized thermal performance for sustained 185 °C operation-making it the preferred choice for next-generation compact automotive electronics.
Availability
TPSMP24HM3/85A is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump power supplies requiring stable component supply and long-term lifecycle support.
Supply support for TPSMP24HM3/85A 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, and protection devices with emphasis on reliability and automotive qualification.
The TPSMP series belongs to Vishay's eSMP® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant 12 V/24 V automotive and harsh-environment industrial applications.
FAQ
What is the breakdown voltage range of the TPSMP24HM3/85A?
The TPSMP24HM3/85A has a guaranteed breakdown voltage (VBR) range of 21.6 V to 26.4 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots while providing adequate margin above the 19.4 V stand-off voltage (VWM) for 24 V system applications. The TPSMP24HM3/85A maintains this specification across its full operating temperature range.
Is the TPSMP24HM3/85A suitable for automotive under-hood use?
Yes, the TPSMP24HM3/85A is AEC-Q101 qualified and rated for continuous operation up to +185 °C junction temperature, making it suitable for under-hood environments including engine control units and transmission control modules. Its DO-220AA package passes MSL Level 1 reflow requirements, and its passivated anisotropic rectifier structure ensures stable performance under thermal cycling and humidity exposure. The TPSMP24HM3/85A is explicitly listed in Vishay's automotive-grade product portfolio.
What is the clamping voltage of the TPSMP24HM3/85A at maximum rated surge current?
The TPSMP24HM3/85A clamps to a maximum of 34.7 V at its rated peak pulse current (IPPM) of 11.5 A, using the standard 10/1000 μs double-exponential waveform. This clamping voltage is measured under specified test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The TPSMP24HM3/85A achieves this performance with low incremental surge resistance, critical for protecting sensitive 24 V-rated ICs.
Does the TPSMP24HM3/85A have bidirectional capability?
No, the TPSMP24HM3/85A is a unidirectional TVS diode, meaning it functions as a Zener-like clamp only in reverse bias and conducts forward current like a standard diode. Its polarity is marked by a cathode band, and it must be oriented correctly on the PCB to protect against negative-going transients on positive rails. Bidirectional variants are not offered in the TPSMP24x family; the TPSMP24HM3/85A is strictly unidirectional per Vishay's datasheet specifications.
What packaging option does TPSMP24HM3/85A use and how many units are supplied per reel?
The TPSMP24HM3/85A is supplied in 13-inch diameter plastic tape and reel packaging, with a base quantity of 10,000 units per reel. The "85A" suffix in the part number explicitly denotes this delivery format, distinguishing it from the 7-inch reel variant (e.g., TPSMP24HM3/84A). The DO-220AA (SMP) package is compatible with standard high-speed pick-and-place equipment, and the matte tin-plated leads meet J-STD-002 solderability requirements for lead-free reflow.
TPSMP24HM3/85A 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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)
TPSMP24HM3/85A FAQ
1.How can I place an order for TPSMP24HM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP24HM3/85A 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 TPSMP24HM3/85A reliable?
The price and inventory of TPSMP24HM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP24HM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP24HM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP24HM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP24HM3/85A?
TPSMP24HM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP24HM3/85A 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 TPSMP24HM3/85A?
For technical support, including TPSMP24HM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP24HM3/85A requirements.
6.How does Aetrix verify that TPSMP24HM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP24HM3/85A 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 TPSMP24HM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP24HM3/85A?
All TPSMP24HM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP24HM3/85A, 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 TPSMP24HM3/85A part is unused and in its original packaging.
Return procedure for TPSMP24HM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP24HM3/85A Tags
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