BAT46WH - 100V 250mA Schottky Diode SOD-123F | Nexperia
부품 번호: BAT46WH ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.12 | $0.12 |
| 10 | $0.09 | $0.90 |
| 100 | $0.055 | $5.50 |
| 500 | $0.038 | $19.00 |
| 1,000 | $0.029 | $29.00 |
BAT46WH 개요
A Schottky barrier diode is a semiconductor diode formed by a metal-semiconductor junction rather than a P-N junction. Because it stores far less minority-carrier charge than a conventional rectifier diode, a Schottky diode switches very fast and exhibits a lower forward voltage drop, placing it at the top of the rectifier-diode hierarchy within the broader family of discrete semiconductors used in power management and signal protection circuits.
Key features of the BAT46WH include the 100 V reverse voltage rating (well above the 30-40 V of typical small-signal Schottky diodes), the 850 mV maximum forward voltage at rated current, and a 2.5 A non-repetitive surge rating for handling inrush events. A planar construction with an integrated guard ring provides stress protection and stable reverse characteristics, and the flat-lead SOD-123F package improves solder-joint reliability compared with the standard SOD-123 formed lead.
Technically, the device is a single-diode configuration intended for general-purpose high-speed switching, low-loss rectification, reverse-polarity protection, and line termination. The guard-ring structure clamps peak electric fields at the junction edge, which is what enables the unusually high 100 V rating in such a small footprint.
Typical applications include DC-DC converter output rectification, reverse battery and reverse polarity protection on battery-powered equipment, signal clipping and clamping networks, and termination circuits in industrial and consumer electronics.
For design, note that Schottky reverse leakage rises significantly with temperature; verify leakage at the worst-case ambient, and respect the 250 mA average forward current limit plus the 155 C maximum operating temperature.
This page synthesizes distributor pricing, drop-in alternative analysis, pinout detail, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: BAT46WH — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: BAT46WH (동일 폼 팩터 및 풋프린트) — 차이점: Package, Diode Type, Technology, Average Forward Current (IF(AV)), Mounting Type.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
BAT46WJ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$0.024 / 개
데이터시트 보기 →BAT46W
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$0.029 / 개
데이터시트 보기 →BAT46W-E3/W
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
BAT46WH 최대 정격 & 전기적 특성
| Diode Configuration | Single |
| Technology | Planar Schottky barrier with integrated guard ring |
| Repetitive Peak Reverse Voltage (VRRM) | 100 V |
| Forward Current (IF) | 250 mA |
| Forward Voltage (VF) | 850 mV |
| Non-Repetitive Peak Forward Current | 2.5 A |
| Maximum Operating Temperature | 155 C |
| 패키지 | SOD-123F (flat lead) SMD |
| 실장 유형 | Surface Mount |
| Terminal Position | Dual |
| Terminal Form | Flat |
| Number of Terminals | 2 |
| Package Shape | Rectangular |
| Typical Applications | High-speed switching, voltage clamping, line termination, reverse polarity protection |
| RoHS 상태 | Compliant |
BAT46WH 핀 구성
| 핀 1 | K (Cathode) — Cathode terminal, marked by the band on the SOD-123F body |
| 핀 2 | A (Anode) — Anode terminal |
일반적인 애플리케이션
BAT46WH 적합 용도: 6 애플리케이션s: Reverse Polarity Protection, High-Speed Switching Circuits, Voltage Clamping and Clipper Networks, DC-DC Converter Output Rectification, Line Termination and Signal Protection, Industrial and Consumer General-Purpose Rectification.
Reverse Polarity Protection
The BAT46WH is explicitly designated by Nexperia for reverse polarity protection, making it a natural fit for battery-powered and field-wired equipment. Its 100 V repetitive reverse voltage gives wide headroom over 12 V, 24 V, and even 48 V DC buses, so inductive kick or supply transients rarely threaten the device. In a series-protection configuration the 850 mV maximum forward voltage keeps conduction loss modest at currents up to 250 mA; a shunt configuration across the input trades constant leakage for zero series drop. Compared with a standard silicon diode, the Schottky junction eliminates reverse-recovery charge, so it clamps immediately when polarity reverses.
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High-Speed Switching Circuits
Because a Schottky barrier junction stores virtually no minority-carrier charge, the BAT46WH switches between forward and reverse bias with negligible reverse recovery time, which Nexperia lists among its primary use cases. This suits it for switching applications such as detector stages, gating, and waveform-shaping networks where a P-N diode's recovery would corrupt fast edges. The planar construction keeps junction capacitance low, and the 100 V rating means designers can use the same part in both low- and moderately high-voltage signal paths, simplifying the bill of materials. Verify junction capacitance limits from the datasheet curves when operating at very high frequencies.
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Voltage Clamping and Clipper Networks
The BAT46WH's low 850 mV forward voltage and fast switching make it effective as a clamp or clipper that limits signal excursions without introducing significant delay or distortion at moderate frequencies. The integrated guard ring stabilizes the reverse characteristic near breakdown, so clamping behavior remains predictable over temperature and lot-to-lot. With a 100 V VRRM rating, the diode survives large clamped voltage swings that would destroy 30-40 V small-signal Schottkys. Designers should budget the 250 mA average current limit and confirm that clamped energy keeps the junction below the 155 C maximum operating temperature during repetitive transient events.
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DC-DC Converter Output Rectification
In low-power switching converters, the BAT46WH can serve as the output (freewheeling or catch) rectifier for loads up to 250 mA average. The Schottky's absence of reverse recovery reduces switching losses on each converter cycle, improving efficiency compared with a fast-recovery P-N diode, and the 850 mV forward drop limits conduction loss at low duty-cycle outputs. The 2.5 A non-repetitive peak rating covers start-up and capacitor-charging inrush events. Note that Schottky leakage rises with temperature, which slightly degrades light-load efficiency on hot boards; the 100 V rating also allows use on 24 V and 48 V input topologies with adequate switching-node margin.
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Line Termination and Signal Protection
Nexperia lists line termination among the BAT46WH's intended applications. Schottky clamps placed to rail or to ground on data and transmission lines absorb reflected energy quickly, because the junction turns on without recovery delay and conducts at roughly 850 mV. The flat-lead SOD-123F package minimizes parasitic series inductance relative to formed-lead packages, preserving high-frequency clamping performance on the board. With a 100 V standoff the part also survives ESD-class and cable-discharge residual events that over-stress lower-voltage small-signal diodes, making it a robust choice for industrial field-wired I/O and consumer connector ports.
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Industrial and Consumer General-Purpose Rectification
For general low-current rectification on industrial control boards, appliances, and consumer electronics, the BAT46WH offers a compact, RoHS-compliant building block rated 100 V and 250 mA with operation to 155 C, covering most ambient environments without derating complexity. The flat-lead SOD-123F package improves solder-joint fatigue life on boards subject to thermal cycling - a documented reliability advantage over the formed-lead SOD-123. Its low forward drop reduces self-heating at rated current, and the 2.5 A surge rating tolerates capacitor inrush at power-up. Where a legacy SOD-123 footprint exists, the BAT46W provides an electrical match.
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추천 제품 요약
엔지니어링 참조 데이터: BAT46WH — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | BAT46WJ | BAT46W | BAT46W-E3/W |
|---|---|---|---|---|
| Package | SOD-123F (flat lead) | SOD-123F (flat lead) - same | SOD-123 (formed lead) | SOD-123 (formed lead) |
| Brand | Nexperia | Nexperia | Nexperia | Vishay |
| Reverse Voltage (VRRM) | 100 V | 100 V | 100 V | 100 V |
| Lead Form / Footprint | Flat lead (SOD-123F) | Flat lead - pin-to-pin drop-in | Formed lead - footprint check required | Formed lead - footprint check required |
주요 차별점
- 100 V reverse rating in a small SMD package (vs 1N5711WS-7-F)
- Flat-lead SOD-123F improves board reliability (vs BAT46W)
- Integrated guard ring for stress protection (vs Generic SOD-123 Schottky)
설계 노트
Schottky reverse leakage in the BAT46WH approximately doubles roughly every 10 C of junction temperature rise, so leakage on a hot board can be an order of magnitude above the 25 C figure. Estimate power dissipation as P = VF x IF = 0.85 V x 0.25 A = about 0.21 W (Estimated: using datasheet VF and IF maxima) plus leakage loss on the blocking phase. Keep the junction below the 155 C maximum, and for sealed enclosures validate leakage at worst-case ambient since it directly affects standby current in battery products.
The SOD-123F flat-lead package is designed to sit flush on the pad, improving solder-joint reliability - do not substitute a formed-lead SOD-123 footprint without checking pad geometry, since the flat lead changes fillet formation. Keep cathode band orientation confirmed in the pick-and-place file; reversed BAT46WH placement is a common rework cause. Typical land patterns from the Nexperia datasheet package outline should be used as-is for reliable reflow.
Do not exceed the 250 mA average forward current or 100 V repetitive reverse voltage even briefly in repetitive operation - the 2.5 A figure is a NON-REPETITIVE surge rating only. When substituting from other brands' BAT46-family parts, verify that the SOD-123 formed-lead variant actually meets the same VF and leakage limits, since these differ between manufacturers; always order the ,115 suffix code for the RoHS-compliant version.
규정 준수 정보
Ordering code BAT46WH,115 denotes RoHS-compliant, lead-free finish per Nexperia/DigiKey product listings. REACH and halogen-free status not stated in provided data.
