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Vishay General Semiconductor - Diodes Division TPSMP43AHM3/85A
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- Part No.:
- TPSMP43AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP43AHM3/85A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,710
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Product details
Overview
TPSMP43AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-energy surge protection on DC power rails and signal lines. It features 40.9 V to 45.2 V breakdown voltage (VBR), 36.8 V stand-off voltage (VWM), 59.3 V clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating - enabling robust protection of automotive ECUs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the TPSMP43AHM3/85A datasheet, TPSMP43AHM3/85A pinout, TPSMP43AHM3/85A application, or TPSMP43AHM3/85A equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C junction temperature rating, low-profile 1.0 mm height, MSL Level 1 reflow compatibility, and uni-directional clamping behavior for DC-biased lines.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-reliability transient suppression. Its unidirectional architecture provides forward conduction capability while clamping reverse transients above VWM, with fast response time (<1 ns) and low incremental surge resistance ensuring minimal let-through energy during ESD or lightning-induced surges.
The device operates across -65 °C to +185 °C junction temperature range and is rated for 40 A non-repetitive forward surge current (IFSM). Its DO-220AA package supports automated placement and meets UL 94 V-0 flammability requirements, with matte tin-plated terminals compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V - defines precise breakdown threshold for reliable triggering above normal operating voltage |
| VWM | 36.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA, ensuring no false triggering in 36 V systems |
| VC @ IPPM | 59.3 V at 6.7 A - clamping voltage under 10/1000 μs surge, limiting downstream voltage stress to safe levels |
| PPPM | 400 W - peak pulse power handling capacity for transient events per IEC 61000-4-5 Level 4 compliance |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without thermal derating penalties |
| Package | DO-220AA (SMP) - 1.0 mm typical height, 2.67 mm × 1.88 mm footprint, optimized for space-constrained PCB layouts |
Pinout & Package
TPSMP43AHM3/85A 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 correct clamping direction on DC-biased lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to lower-potential side (e.g., ground or negative rail) in uni-directional configuration |
| Cathode | Reverse surge input / forward current exit | Connected to protected line (e.g., 36 V supply or CAN-H); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| 185 °C junction rating | Enables direct placement near heat sources (e.g., power MOSFETs or motor drivers) without external thermal management |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
| Low-profile 1.0 mm height | Reduces board-level mechanical interference in stacked or shielded assemblies, especially in ADAS camera modules |
| Uni-directional clamping | Provides forward conduction path for DC bias while suppressing only negative-going transients - ideal for single-supply sensor interfaces |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 36 V supply lines feeding microcontroller peripherals and LIN transceivers against load dump and ISO 7637-2 pulses. IC Role / Device Role: Uni-directional TVS clamp placed between fused 36 V rail and local decoupling capacitor. Use Value: Limits transient voltage to ≤59.3 V, preventing latch-up or gate oxide damage in 40 V-rated logic ICs and transceivers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role: Primary surge suppression element on field-side input traces, upstream of optocoupler isolation barrier. Use Value: Absorbs 400 W surges without degradation, maintaining <1 μA leakage at 24 V to preserve input logic thresholds over lifetime. |
| Automotive Camera Power Rail | Automotive HVAC Blower Motor Driver |
Use Scenario: Shielding image sensor power pins from ESD and switching noise generated by adjacent DC-DC converters in rear-view camera modules. IC Role / Device Role: Localized TVS on 3.3 V or 5 V LDO output, placed within 2 mm of sensor VDD pin. Use Value: 1.0 mm profile avoids interference with lens housing; 185 °C rating ensures stability during prolonged engine-off cabin heating. |
Use Scenario: Clamping voltage spikes induced by PWM commutation of 12 V/24 V blower motors in climate control systems. IC Role / Device Role: Parallel-connected TVS across motor terminals to suppress back-EMF exceeding 36 V during rapid deceleration. Use Value: Withstands 40 A IFSM, enabling direct placement without series fusing - reducing BOM count and failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5AT | DO-214AC (SMA) package, 4.5 mm height, 400 W PPPM, VC = 69.4 V @ 5.8 A | Higher clamping voltage and larger footprint; less suitable for ultra-low-profile automotive modules | Select when legacy SMA footprint compatibility is required and board height >4.5 mm is acceptable |
| TPSMA6.8A-Q | Same DO-220AA package but lower VBR (6.45–7.14 V); AEC-Q101 qualified; VC = 10.5 V @ 500 A | Designed for 5 V rail protection; not interchangeable due to 30 V+ VBR mismatch | Choose only for sub-12 V systems requiring identical package and automotive qualification |
Compared with SMAJ43A-E3/5AT, TPSMP43AHM3/85A offers 3.5 mm lower profile and tighter clamping (59.3 V vs. 69.4 V), improving system-level surge margin; versus TPSMA6.8A-Q, it delivers 3× higher VBR and 36 V system compatibility - making it uniquely suited for 24–36 V automotive and industrial power rail protection.
Availability
TPSMP43AHM3/85A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and ADAS camera power systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for TPSMP43AHM3/85A 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The TPSMP43AHM3/85A belongs to Vishay's eSMP® Series PAR® TVS family, engineered specifically for high-power-density transient suppression in space-constrained, high-temperature automotive and industrial environments.
FAQ
What is the exact breakdown voltage range for TPSMP43AHM3/85A?
The TPSMP43AHM3/85A has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent triggering behavior across production lots and temperature extremes, critical for protecting 36 V nominal systems where overvoltage margin must be precisely controlled - a key specification confirmed in Vishay Document Number 88471, page 2.
Is TPSMP43AHM3/85A suitable for 24 V automotive power rail protection?
Yes, TPSMP43AHM3/85A is explicitly designed for 24 V and 36 V automotive power rails. Its 36.8 V stand-off voltage (VWM) exceeds typical 24 V system transients (e.g., ISO 16750-2 cold crank), while its 59.3 V clamping voltage limits stress on downstream 40 V-rated components. AEC-Q101 qualification and 185 °C junction rating further validate its suitability for under-hood deployment - as documented in the "PRIMARY CHARACTERISTICS" table of Vishay's 88471 datasheet.
Does TPSMP43AHM3/85A have a bidirectional variant?
No, TPSMP43AHM3/85A is strictly unidirectional. The "A" suffix in the part number denotes the tighter 5 % VBR tolerance version, not polarity - all TPSMPx.xA devices in this family are unidirectional. For bidirectional protection, Vishay offers separate part numbers such as TPSP43AHM3/85A (not listed in this datasheet), which requires explicit verification via Vishay's official parametric search or distributor cross-reference tools.
What is the maximum peak pulse current rating for TPSMP43AHM3/85A?
The TPSMP43AHM3/85A is rated for 6.7 A peak pulse current (IPPM) under the standard 10/1000 μs waveform, corresponding to its 400 W peak pulse power (PPPM) rating for VBR ≥13 V. This value is validated with 5.0 mm × 5.0 mm copper pads per terminal on FR-4 PCB, as specified in the "MAXIMUM RATINGS" table on page 2 of Vishay Document Number 88471.
How does the DO-220AA package of TPSMP43AHM3/85A compare to SMA (DO-214AC) in thermal performance?
The DO-220AA (SMP) package of TPSMP43AHM3/85A achieves comparable thermal resistance to SMA when mounted on optimized 5.0 mm × 5.0 mm copper pads, despite its 1.0 mm height. Its smaller footprint (2.67 mm × 1.88 mm vs. SMA's 4.5 mm × 2.7 mm) concentrates heat into a denser copper area, enabling efficient lateral conduction - a design advantage confirmed in Vishay's thermal derating curves (Fig. 6, page 4 of 88471) and validated by AEC-Q101 thermal cycling tests.
TPSMP43AHM3/85A 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
TPSMP43AHM3/85A FAQ
1.How can I place an order for TPSMP43AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP43AHM3/85A 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 TPSMP43AHM3/85A reliable?
The price and inventory of TPSMP43AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP43AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP43AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP43AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP43AHM3/85A?
TPSMP43AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP43AHM3/85A 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 TPSMP43AHM3/85A?
For technical support, including TPSMP43AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP43AHM3/85A requirements.
6.How does Aetrix verify that TPSMP43AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP43AHM3/85A 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 TPSMP43AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP43AHM3/85A?
All TPSMP43AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP43AHM3/85A, 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 TPSMP43AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP43AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP43AHM3/85A Tags
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