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Taiwan Semiconductor Corporation PU1BMH
- Part No.:
- PU1BMH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
PU1BMH.pdf
- Description:
- DIODE GEN PURP 100V 1A MICRO SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
PU1BMH from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in Micro SMA package, featuring 25ns reverse recovery time, 0.90V forward voltage at 1A/25°C, and AEC-Q101 qualification for automotive use in snubber and freewheeling circuits.
For engineers reviewing the PU1BMH datasheet, PU1BMH pinout, PU1BMH application, or PU1BMH equivalent, key selection criteria include repetitive peak reverse voltage (100V), surge current capability (28A @ 8.3ms), junction temperature range (–55°C to +175°C), thermal resistance (RθJL = 28°C/W), and Micro SMA mechanical compatibility with automated placement.
Technical Context
This device is a planar-structured silicon ultra-fast recovery rectifier optimized for high-frequency switching applications where low reverse recovery charge (Qrr = 40nC) and fast trr (24–25ns) minimize switching losses. Its cathode-band polarity marking and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker requirements.
The PU1BMH operates across –55°C to +175°C junction temperature, with thermal performance characterized on a 5mm × 5mm Cu pad PCB. It delivers stable reverse leakage (<1µA @ 25°C, <15µA @ 125°C) and exhibits 18pF junction capacitance at 1MHz/4V, supporting high-speed DC–DC converter node decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in snubber or freewheeling paths. |
| IF | 1 A - Continuous forward current rating; determines steady-state power dissipation and heatsink sizing. |
| trr | 24–25 ns - Ultra-fast reverse recovery time; reduces switching loss and EMI in >100kHz DC–DC topologies. |
| Qrr | 40 nC - Low reverse recovery charge; minimizes voltage overshoot during diode turn-off in inductive loads. |
| RθJL | 28 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB copper for passive cooling. |
| VF @ 1A/25°C | 0.90 V - Forward voltage drop; sets conduction loss (0.9W @ 1A) and impacts efficiency in low-voltage output stages. |
| IR @ 125°C | <15 µA - Reverse leakage at elevated temperature; ensures reliability in under-hood automotive environments. |
Pinout & Package
Package: Micro SMA - Surface-mount plastic package with molded UL 94V-0 compound, matte tin-plated leads, and cathode band polarity indicator. Dimensions conform to standard Micro SMA outline with 0.006g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of inductive load or switch node; requires adequate trace width for 1A continuous current. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential rail or switch drain/source; critical for correct orientation in freewheeling path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test conditions. |
| Ultra-fast recovery (trr ≤ 25 ns) | Enables operation in high-frequency (>200 kHz) converters without excessive switching loss or ringing. |
| Low Qrr (40 nC) | Reduces voltage spike amplitude during turn-off, easing clamp circuit design and improving MOSFET SOA margin. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling. |
| Junction temp max = +175°C | Supports under-hood placement in LED drivers and engine control modules without derating at ambient up to +125°C. |
Applications
| DC–DC Converter Output Rectification | Automotive LED Lighting Driver |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters powering infotainment displays or instrument clusters. IC Role / Device Role / Timing Role: Freewheeling diode conducting during transformer reset phase; handles 1A average current with minimal conduction loss. Use Value: 0.90V VF limits power loss to 0.9W; 25ns trr prevents cross-conduction in synchronous designs and reduces EMI filtering burden. | Use Scenario: Constant-current LED string supply in headlamp or DRL modules exposed to under-hood thermal transients. IC Role / Device Role / Timing Role: Snubber diode clamping inductive kickback from LED driver MOSFETs during PWM dimming transitions. Use Value: 100V VRRM withstands 60V system transients plus 40V inductive spikes; AEC-Q101 qualification ensures 15-year field life. |
| Freewheeling in Automotive ECUs | Snubber Network in Power Relays |
Use Scenario: Inductive load flyback suppression in engine control unit solenoid drivers or fuel injector interfaces. IC Role / Device Role / Timing Role: Freewheeling path for coil energy dissipation during MOSFET turn-off; conducts brief high-current pulses. Use Value: 28A IFSM (8.3ms) safely absorbs 500mJ surge energy; 175°C TJMAX accommodates localized heating near power stages. | Use Scenario: RC snubber across relay contacts or power MOSFETs in HVAC blower or seat motor control modules. IC Role / Device Role / Timing Role: Fast-recovery diode shunting transient voltage spikes to ground during contact opening or switch turn-off. Use Value: 24ns trr and 18pF CJ provide broadband suppression up to 100MHz; Micro SMA footprint fits compact relay PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 1A/600V, trr = 35ns, VF = 1.15V @ 1A - higher VRRM, slower recovery, higher conduction loss | Designed for higher-voltage industrial SMPS; less optimal for 12–48V automotive snubbers due to excess voltage rating and loss | Select when 600V blocking is required; avoid if minimizing switching loss or board space is critical. |
| MBR1100 | 1A/100V Schottky, VF = 0.82V @ 1A, no reverse recovery - zero Qrr, but IR = 500µA @ 125°C | Used where ultra-low VF dominates; unsuitable for high-temp reverse-biased nodes due to leakage-driven power loss | Prefer for low-loss 25°C operation; reject for under-hood freewheeling where IR >10µA causes thermal runaway risk. |
Compared with STTH1R06 and MBR1100, the PU1BMH uniquely balances 100V rating, 25ns trr, sub-1V VF, and <15µA IR at 125°C - making it optimal for thermally constrained, high-frequency automotive power stages where leakage, speed, and voltage rating must co-optimize.
Availability
PU1BMH is available at Aetrix Electronics and suitable for automotive LED lighting, DC–DC converter output rectification, and freewheeling applications requiring stable component supply, AEC-Q101 compliance, and Micro SMA surface-mount compatibility.
Supply support for PU1BMH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The PU1BMH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-reliability automotive power conversion where fast recovery, low leakage, and thermal robustness are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage rating for PU1BMH?
The PU1BMH has a maximum repetitive peak reverse voltage (VRRM) of 100 V, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet revision C2103. This rating defines the highest reverse voltage the diode can block repeatedly without breakdown under normal operating conditions and must not be exceeded in circuit design.
Is PU1BMH suitable for automotive applications requiring AEC-Q101 qualification?
Yes, PU1BMH is explicitly AEC-Q101 qualified per its official product documentation. This certification covers stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - confirming suitability for under-hood automotive systems such as LED drivers and ECU power stages where PU1BMH is deployed.
What is the forward voltage drop of PU1BMH at 1A and 25°C?
The forward voltage (VF) of PU1BMH is specified as 0.90 V maximum at 1A forward current and 25°C junction temperature, with a typical value of 0.84 V under the same conditions. This parameter is measured using a 0.3ms pulse width and directly impacts conduction loss and thermal design in PU1BMH-based power stages.
Does PU1BMH have a defined reverse recovery time, and what is its value?
Yes, PU1BMH specifies a reverse recovery time (trr) of 24 ns (typical) and 25 ns (maximum), measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A conditions. This ultra-fast recovery characteristic is critical for minimizing switching loss and EMI in high-frequency DC–DC converters where PU1BMH serves as the output rectifier.
What package type does PU1BMH use, and is it compatible with automated SMT assembly?
PU1BMH uses the Micro SMA surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability standards. Its moisture sensitivity level is rated at Level 1 per J-STD-020, meaning it requires no baking prior to reflow - fully supporting high-volume automated placement and reflow processes used in PU1BMH manufacturing.
PU1BMH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 2-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.05 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 36 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 100 V
- Capacitance @ Vr, F:
- 18pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Micro SMA
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU1BMH FAQ
1.How can I place an order for PU1BMH through Aetrix?
Please submit a Request for Quotation (RFQ) for PU1BMH 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 PU1BMH reliable?
The price and inventory of PU1BMH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BMH is usually 5 days.
3.What payment methods are accepted for PU1BMH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BMH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU1BMH?
PU1BMH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU1BMH 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 PU1BMH?
For technical support, including PU1BMH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BMH requirements.
6.How does Aetrix verify that PU1BMH is sourced from the original manufacturer or authorized distributors?
All PU1BMH 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 PU1BMH meets industry standards.
7.What is the process for return or replacement of PU1BMH?
All PU1BMH units undergo pre-shipment inspection (PSI). If there is an issue with PU1BMH, 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 PU1BMH part is unused and in its original packaging.
Return procedure for PU1BMH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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