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Vishay General Semiconductor - Diodes Division TPSMA27AHM3_B/H
- Part No.:
- TPSMA27AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27AHM3_B/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,190
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Product details
Overview
TPSMA27AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 10.7 A, 400 W peak pulse power (10/1000 µs), 185 °C max junction temperature, and SMA (DO-214AC) package - used in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMA27AHM3_B/H datasheet, TPSMA27AHM3_B/H pinout, TPSMA27AHM3_B/H application, or TPSMA27AHM3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), 1.0 W steady-state power dissipation, low incremental surge resistance, and compatibility with reflow profiles up to 260 °C (MSL Level 1).
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response (<1 ns). Its clamping behavior is defined by a 10/1000 µs waveform with 0.01% duty cycle, and it operates across -65 °C to +185 °C junction temperature range.
The device exhibits a typical VBR temperature coefficient of +0.087 %/°C and maintains stable reverse leakage (<1 µA at VWM = 23.1 V, TJ = 150 °C), enabling reliable operation in under-hood automotive environments and thermally demanding industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 V / 27.0 V / 28.4 V at 1 mA - defines precise voltage threshold where avalanche conduction begins under transient stress |
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capability without failure |
| TJ max | +185 °C - enables use in high-ambient-temperature locations like engine compartments |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes terminal orientation |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pad layout requirement |
Pinout & Package
SMA (DO-214AC) package with molded epoxy body, matte tin-plated leads, and cathode identification via color band. Designed for PCB mounting with minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche diode structure | Connected to protected line (e.g., 24 V rail); conducts when transient exceeds VBR |
| Anode (non-banded end) | Cathode of internal avalanche diode structure | Typically tied to ground or lower-potential reference; completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114 |
| 185 °C junction rating | Supports operation in under-hood electronics without derating up to ambient 150 °C |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow soldering without moisture sensitivity concerns |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage margin required for protected ICs, improving system robustness |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance requirements for global automotive and industrial OEMs |
Applications
| Automotive Sensor Protection | Industrial Power Input Stage |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role: Primary clamping element placed between sensor supply line and chassis ground. Use Value: Limits transient voltage to ≤37.5 V, preventing damage to 3.3 V/5 V interface ICs while maintaining AEC-Q101 qualification. | Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules and motor drives against inductive kickback from solenoids and contactors. IC Role / Device Role: Standoff protector parallel to bulk input capacitor, absorbing repetitive 400 W surges. Use Value: Enables >100,000 surge cycles with no parameter shift due to 185 °C TJ rating and low incremental resistance. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 transceiver VCC from EFT/burst events per IEC 61000-4-4. IC Role / Device Role: Secondary-level TVS on board-level power distribution net. Use Value: Delivers sub-1 ns response and <1 µA leakage at 23.1 V, preserving signal integrity and standby current budgets. | Use Scenario: Guarding microcontroller reset and communication lines in washing machine main boards exposed to relay switching noise. IC Role / Device Role: Point-of-load transient suppressor adjacent to MCU VDD pins. Use Value: Halogen-free HM3 construction meets regional appliance safety regulations while providing 37.5 V clamping at 10.7 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same VBR range (25.7–28.4 V), but SMB package (DO-214AA); 600 W PPPM, higher IPPM (17.3 A) | Larger footprint; better suited for higher-energy surges where board space allows | Select SMBJ27A when surge energy exceeds 400 W or thermal pad area supports larger package |
| TPSMA27AHE3_B/H | Identical electrical specs and SMA package, but HE3 suffix: RoHS-compliant and AEC-Q101 qualified, not halogen-free | No halogen-free certification; may not meet strict automotive material declarations | Choose TPSMA27AHE3_B/H if halogen content is not restricted in target application |
Compared with SMBJ27A and TPSMA27AHE3_B/H, the TPSMA27AHM3_B/H uniquely combines halogen-free construction, AEC-Q101 qualification, and compact SMA footprint - making it optimal for space-constrained, environmentally regulated automotive and industrial designs requiring full material compliance.
Availability
TPSMA27AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power input stage hardening, and telecom line interface surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA27AHM3_B/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and high-temperature performance.
The TPSMA series belongs to Vishay's PAR® transient voltage suppressor product line, engineered specifically for robust, high-temperature-stable clamping in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance for TPSMA27AHM3_B/H?
The TPSMA27AHM3_B/H has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tolerance is verified per ANSI/IEEE C62.35 and applies at TA = 25 °C; actual VBR shifts predictably with temperature using αT = +0.087 %/°C. The TPSMA27AHM3_B/H datasheet confirms this range in Table 1 under ELECTRICAL CHARACTERISTICS.
Is TPSMA27AHM3_B/H suitable for bidirectional transient protection?
No, the TPSMA27AHM3_B/H is unidirectional only, as explicitly stated in the Vishay datasheet Features section. It protects against positive-going transients on the cathode side relative to anode (ground). For bidirectional protection, a separate device such as the SMBJ27CA or a dual-diode configuration would be required. The TPSMA27AHM3_B/H marking code "BPP" and polarity designation confirm single-anode/cathode architecture.
Does TPSMA27AHM3_B/H meet automotive qualification standards?
Yes, the TPSMA27AHM3_B/H carries the HM3 suffix, indicating full AEC-Q101 qualification per the Vishay datasheet. It satisfies stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock - validated for use in automotive powertrain, body, and chassis modules. The TPSMA27AHM3_B/H also meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements.
What is the maximum clamping voltage of TPSMA27AHM3_B/H at rated surge current?
The TPSMA27AHM3_B/H has a maximum clamping voltage (VC) of 37.5 V at its rated peak pulse current (IPPM) of 10.7 A, measured with a 10/1000 µs waveform. This value is guaranteed across the operating temperature range and reflects worst-case device behavior under standardized surge conditions. The TPSMA27AHM3_B/H achieves this with low incremental surge resistance, ensuring consistent clamping performance in repeated transient events.
How does the HM3 suffix differ from HE3 in TPSMA27A variants?
The HM3 suffix on TPSMA27AHM3_B/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 indicates RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both share identical electrical parameters and SMA packaging, but HM3 meets stricter material declarations required by Tier 1 automotive suppliers and EU environmental directives. The TPSMA27AHM3_B/H datasheet specifies HM3 compliance in the MECHANICAL DATA section.
TPSMA27AHM3_B/H 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
TPSMA27AHM3_B/H FAQ
1.How can I place an order for TPSMA27AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27AHM3_B/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 TPSMA27AHM3_B/H reliable?
The price and inventory of TPSMA27AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA27AHM3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA27AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27AHM3_B/H?
TPSMA27AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27AHM3_B/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 TPSMA27AHM3_B/H?
For technical support, including TPSMA27AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27AHM3_B/H requirements.
6.How does Aetrix verify that TPSMA27AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA27AHM3_B/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 TPSMA27AHM3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA27AHM3_B/H?
All TPSMA27AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27AHM3_B/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 TPSMA27AHM3_B/H part is unused and in its original packaging.
Return procedure for TPSMA27AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA27AHM3_B/H Tags
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